mirror of https://gerrit.osmocom.org/libosmocore
2804 lines
86 KiB
C
2804 lines
86 KiB
C
/*
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* (C) 2011-2017 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include "config.h"
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/*! \addtogroup socket
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* @{
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* Osmocom socket convenience functions.
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*
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* \file socket.c */
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#ifdef HAVE_SYS_SOCKET_H
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#define _GNU_SOURCE /* for struct ucred on glibc >= 2.8 */
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#include <osmocom/core/logging.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/core/sockaddr_str.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/utils.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/un.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <netdb.h>
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#include <ifaddrs.h>
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#ifdef HAVE_LIBSCTP
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#include <netinet/sctp.h>
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#endif
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static struct addrinfo *addrinfo_helper(uint16_t family, uint16_t type, uint8_t proto,
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const char *host, uint16_t port, bool passive)
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{
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struct addrinfo hints, *result, *rp;
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char portbuf[6];
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int rc;
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snprintf(portbuf, sizeof(portbuf), "%u", port);
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memset(&hints, 0, sizeof(struct addrinfo));
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hints.ai_family = family;
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if (type == SOCK_RAW) {
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/* Workaround for glibc, that returns EAI_SERVICE (-8) if
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* SOCK_RAW and IPPROTO_GRE is used.
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* http://sourceware.org/bugzilla/show_bug.cgi?id=15015
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*/
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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} else {
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hints.ai_socktype = type;
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hints.ai_protocol = proto;
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}
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if (passive)
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hints.ai_flags |= AI_PASSIVE;
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rc = getaddrinfo(host, portbuf, &hints, &result);
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if (rc != 0) {
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LOGP(DLGLOBAL, LOGL_ERROR, "getaddrinfo(%s, %u) failed: %s\n",
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host, port, gai_strerror(rc));
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return NULL;
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}
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for (rp = result; rp != NULL; rp = rp->ai_next) {
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/* Workaround for glibc again */
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if (type == SOCK_RAW) {
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rp->ai_socktype = SOCK_RAW;
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rp->ai_protocol = proto;
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}
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}
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return result;
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}
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#ifdef HAVE_LIBSCTP
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/*! Retrieve an array of addrinfo with specified hints, one for each host in the hosts array.
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* \param[out] addrinfo array of addrinfo pointers, will be filled by the function on success.
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* Its size must be at least the one of hosts.
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* \param[in] family Socket family like AF_INET, AF_INET6.
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* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM.
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* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP.
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* \param[in] hosts array of char pointers (strings) containing the addresses to query.
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* \param[in] host_cnt length of the hosts array (in items).
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* \param[in] port port number in host byte order.
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* \param[in] passive whether to include the AI_PASSIVE flag in getaddrinfo() hints.
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* \returns 0 is returned on success together with a filled addrinfo array; negative on error
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*/
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static int addrinfo_helper_multi(struct addrinfo **addrinfo, uint16_t family, uint16_t type, uint8_t proto,
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const char **hosts, size_t host_cnt, uint16_t port, bool passive)
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{
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unsigned int i, j;
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for (i = 0; i < host_cnt; i++) {
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addrinfo[i] = addrinfo_helper(family, type, proto, hosts[i], port, passive);
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if (!addrinfo[i]) {
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for (j = 0; j < i; j++)
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freeaddrinfo(addrinfo[j]);
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return -EINVAL;
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}
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}
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return 0;
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}
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#endif /* HAVE_LIBSCTP*/
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static int socket_helper_tail(int sfd, unsigned int flags)
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{
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int rc, on = 1;
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uint8_t dscp = GET_OSMO_SOCK_F_DSCP(flags);
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uint8_t prio = GET_OSMO_SOCK_F_PRIO(flags);
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if (flags & OSMO_SOCK_F_NONBLOCK) {
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if (ioctl(sfd, FIONBIO, (unsigned char *)&on) < 0) {
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LOGP(DLGLOBAL, LOGL_ERROR,
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"cannot set this socket unblocking: %s\n",
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strerror(errno));
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close(sfd);
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return -EINVAL;
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}
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}
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if (dscp) {
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rc = osmo_sock_set_dscp(sfd, dscp);
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if (rc) {
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LOGP(DLGLOBAL, LOGL_ERROR, "cannot set IP DSCP of socket to %u: %s\n",
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dscp, strerror(errno));
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/* we consider this a non-fatal error */
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}
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}
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if (prio) {
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rc = osmo_sock_set_priority(sfd, prio);
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if (rc) {
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LOGP(DLGLOBAL, LOGL_ERROR, "cannot set priority of socket to %u: %s\n",
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prio, strerror(errno));
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/* we consider this a non-fatal error */
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}
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}
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return 0;
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}
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static int socket_helper(const struct addrinfo *rp, unsigned int flags)
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{
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int sfd, rc;
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sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
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if (sfd == -1) {
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LOGP(DLGLOBAL, LOGL_ERROR,
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"unable to create socket: %s\n", strerror(errno));
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return sfd;
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}
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rc = socket_helper_tail(sfd, flags);
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if (rc < 0)
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return rc;
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return sfd;
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}
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static int socket_helper_osa(const struct osmo_sockaddr *addr, uint16_t type, uint8_t proto, unsigned int flags)
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{
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int sfd, rc;
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sfd = socket(addr->u.sa.sa_family, type, proto);
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if (sfd == -1) {
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LOGP(DLGLOBAL, LOGL_ERROR,
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"unable to create socket: %s\n", strerror(errno));
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return sfd;
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}
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rc = socket_helper_tail(sfd, flags);
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if (rc < 0)
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return rc;
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return sfd;
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}
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#ifdef HAVE_LIBSCTP
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/* Fill buf with a string representation of the address set, in the form:
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* buf_len == 0: "()"
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* buf_len == 1: "hostA"
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* buf_len >= 2: (hostA|hostB|...|...)
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*/
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static int multiaddr_snprintf(char* buf, size_t buf_len, const char **hosts, size_t host_cnt)
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{
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int len = 0, offset = 0, rem = buf_len;
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size_t i;
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int ret;
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char *after;
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if (buf_len < 3)
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return -EINVAL;
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if (host_cnt != 1) {
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ret = snprintf(buf, rem, "(");
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if (ret < 0)
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return ret;
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OSMO_SNPRINTF_RET(ret, rem, offset, len);
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}
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for (i = 0; i < host_cnt; i++) {
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if (host_cnt == 1)
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after = "";
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else
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after = (i == (host_cnt - 1)) ? ")" : "|";
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ret = snprintf(buf + offset, rem, "%s%s", hosts[i] ? : "0.0.0.0", after);
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OSMO_SNPRINTF_RET(ret, rem, offset, len);
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}
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return len;
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}
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#endif /* HAVE_LIBSCTP */
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static int osmo_sock_init_tail(int fd, uint16_t type, unsigned int flags)
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{
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int rc;
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/* Make sure to call 'listen' on a bound, connection-oriented sock */
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if ((flags & (OSMO_SOCK_F_BIND|OSMO_SOCK_F_CONNECT)) == OSMO_SOCK_F_BIND) {
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switch (type) {
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case SOCK_STREAM:
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case SOCK_SEQPACKET:
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rc = listen(fd, 10);
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if (rc < 0) {
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LOGP(DLGLOBAL, LOGL_ERROR, "unable to listen on socket: %s\n",
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strerror(errno));
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return -errno;
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}
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break;
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}
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}
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if (flags & OSMO_SOCK_F_NO_MCAST_LOOP) {
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rc = osmo_sock_mcast_loop_set(fd, false);
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if (rc < 0) {
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LOGP(DLGLOBAL, LOGL_ERROR, "unable to disable multicast loop: %s\n",
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strerror(errno));
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return rc;
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}
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}
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if (flags & OSMO_SOCK_F_NO_MCAST_ALL) {
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rc = osmo_sock_mcast_all_set(fd, false);
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if (rc < 0) {
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LOGP(DLGLOBAL, LOGL_ERROR, "unable to disable receive of all multicast: %s\n",
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strerror(errno));
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/* do not abort here, as this is just an
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* optional additional optimization that only
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* exists on Linux only */
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}
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}
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return 0;
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}
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/*! Initialize a socket (including bind and/or connect)
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* \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
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* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
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* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
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* \param[in] local_host local host name or IP address in string form
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* \param[in] local_port local port number in host byte order
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* \param[in] remote_host remote host name or IP address in string form
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* \param[in] remote_port remote port number in host byte order
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* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
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* \returns socket file descriptor on success; negative on error
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*
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* This function creates a new socket of the designated \a family, \a
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* type and \a proto and optionally binds it to the \a local_host and \a
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* local_port as well as optionally connects it to the \a remote_host
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* and \q remote_port, depending on the value * of \a flags parameter.
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*
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* As opposed to \ref osmo_sock_init(), this function allows to combine
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* the \ref OSMO_SOCK_F_BIND and \ref OSMO_SOCK_F_CONNECT flags. This
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* is useful if you want to connect to a remote host/port, but still
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* want to bind that socket to either a specific local alias IP and/or a
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* specific local source port.
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*
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* You must specify either \ref OSMO_SOCK_F_BIND, or \ref
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* OSMO_SOCK_F_CONNECT, or both.
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*
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* If \ref OSMO_SOCK_F_NONBLOCK is specified, the socket will be set to
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* non-blocking mode.
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*/
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int osmo_sock_init2(uint16_t family, uint16_t type, uint8_t proto,
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const char *local_host, uint16_t local_port,
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const char *remote_host, uint16_t remote_port, unsigned int flags)
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{
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struct addrinfo *local = NULL, *remote = NULL, *rp;
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int sfd = -1, rc, on = 1;
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bool local_ipv4 = false, local_ipv6 = false;
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bool remote_ipv4 = false, remote_ipv6 = false;
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if ((flags & (OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) == 0) {
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LOGP(DLGLOBAL, LOGL_ERROR, "invalid: you have to specify either "
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"BIND or CONNECT flags\n");
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return -EINVAL;
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}
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/* figure out local address infos */
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if (flags & OSMO_SOCK_F_BIND) {
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local = addrinfo_helper(family, type, proto, local_host, local_port, true);
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if (!local)
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return -EINVAL;
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}
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/* figure out remote address infos */
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if (flags & OSMO_SOCK_F_CONNECT) {
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remote = addrinfo_helper(family, type, proto, remote_host, remote_port, false);
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if (!remote) {
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if (local)
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freeaddrinfo(local);
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return -EINVAL;
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}
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}
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/* It must do a full run to ensure AF_UNSPEC does not fail.
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* In case first local valid entry is IPv4 and only remote valid entry
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* is IPv6 or vice versa */
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if (family == AF_UNSPEC) {
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for (rp = local; rp != NULL; rp = rp->ai_next) {
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switch (rp->ai_family) {
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case AF_INET:
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local_ipv4 = true;
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break;
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case AF_INET6:
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local_ipv6 = true;
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break;
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}
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}
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for (rp = remote; rp != NULL; rp = rp->ai_next) {
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switch (rp->ai_family) {
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case AF_INET:
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remote_ipv4 = true;
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break;
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case AF_INET6:
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remote_ipv6 = true;
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break;
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}
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}
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if ((flags & OSMO_SOCK_F_BIND) && (flags & OSMO_SOCK_F_CONNECT)) {
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/* prioritize ipv6 as per RFC */
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if (local_ipv6 && remote_ipv6)
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family = AF_INET6;
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else if (local_ipv4 && remote_ipv4)
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family = AF_INET;
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else {
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if (local)
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freeaddrinfo(local);
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if (remote)
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freeaddrinfo(remote);
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LOGP(DLGLOBAL, LOGL_ERROR,
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"Unable to find a common protocol (IPv4 or IPv6) "
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"for local host: %s and remote host: %s.\n",
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local_host, remote_host);
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return -ENODEV;
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}
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} else if ((flags & OSMO_SOCK_F_BIND)) {
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family = local_ipv6 ? AF_INET6 : AF_INET;
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} else if ((flags & OSMO_SOCK_F_CONNECT)) {
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family = remote_ipv6 ? AF_INET6 : AF_INET;
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}
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}
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/* figure out local side of socket */
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if (flags & OSMO_SOCK_F_BIND) {
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for (rp = local; rp != NULL; rp = rp->ai_next) {
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/* When called with AF_UNSPEC, family will set to IPv4 or IPv6 */
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if (rp->ai_family != family)
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continue;
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sfd = socket_helper(rp, flags);
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if (sfd < 0)
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continue;
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if (proto != IPPROTO_UDP || flags & OSMO_SOCK_F_UDP_REUSEADDR) {
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rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
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&on, sizeof(on));
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if (rc < 0) {
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LOGP(DLGLOBAL, LOGL_ERROR,
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"cannot setsockopt socket:"
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" %s:%u: %s\n",
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local_host, local_port,
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strerror(errno));
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close(sfd);
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continue;
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}
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}
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if (bind(sfd, rp->ai_addr, rp->ai_addrlen) == -1) {
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LOGP(DLGLOBAL, LOGL_ERROR, "unable to bind socket: %s:%u: %s\n",
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local_host, local_port, strerror(errno));
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close(sfd);
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continue;
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}
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break;
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}
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freeaddrinfo(local);
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if (rp == NULL) {
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if (remote)
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freeaddrinfo(remote);
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LOGP(DLGLOBAL, LOGL_ERROR, "no suitable local addr found for: %s:%u\n",
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local_host, local_port);
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return -ENODEV;
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}
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}
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/* Reached this point, if OSMO_SOCK_F_BIND then sfd is valid (>=0) or it
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was already closed and func returned. If OSMO_SOCK_F_BIND is not
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set, then sfd = -1 */
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/* figure out remote side of socket */
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if (flags & OSMO_SOCK_F_CONNECT) {
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for (rp = remote; rp != NULL; rp = rp->ai_next) {
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/* When called with AF_UNSPEC, family will set to IPv4 or IPv6 */
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if (rp->ai_family != family)
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continue;
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if (sfd < 0) {
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sfd = socket_helper(rp, flags);
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if (sfd < 0)
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continue;
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}
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rc = connect(sfd, rp->ai_addr, rp->ai_addrlen);
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if (rc != 0 && errno != EINPROGRESS) {
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LOGP(DLGLOBAL, LOGL_ERROR, "unable to connect socket: %s:%u: %s\n",
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remote_host, remote_port, strerror(errno));
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/* We want to maintain the bind socket if bind was enabled */
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if (!(flags & OSMO_SOCK_F_BIND)) {
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close(sfd);
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sfd = -1;
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}
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continue;
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}
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break;
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}
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freeaddrinfo(remote);
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if (rp == NULL) {
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LOGP(DLGLOBAL, LOGL_ERROR, "no suitable remote addr found for: %s:%u\n",
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remote_host, remote_port);
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if (sfd >= 0)
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close(sfd);
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return -ENODEV;
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}
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}
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rc = osmo_sock_init_tail(sfd, type, flags);
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if (rc < 0) {
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close(sfd);
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sfd = -1;
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}
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return sfd;
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}
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#define _SOCKADDR_TO_STR(dest, sockaddr) do { \
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if (osmo_sockaddr_str_from_sockaddr(dest, &sockaddr->u.sas)) \
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osmo_strlcpy((dest)->ip, "Invalid IP", 11); \
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} while (0)
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|
|
/*! Initialize a socket (including bind and/or connect)
|
|
* \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] local local address
|
|
* \param[in] remote remote address
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket file descriptor on success; negative on error
|
|
*
|
|
* This function creates a new socket of the
|
|
* \a type and \a proto and optionally binds it to the \a local
|
|
* as well as optionally connects it to the \a remote
|
|
* depending on the value * of \a flags parameter.
|
|
*
|
|
* As opposed to \ref osmo_sock_init(), this function allows to combine
|
|
* the \ref OSMO_SOCK_F_BIND and \ref OSMO_SOCK_F_CONNECT flags. This
|
|
* is useful if you want to connect to a remote host/port, but still
|
|
* want to bind that socket to either a specific local alias IP and/or a
|
|
* specific local source port.
|
|
*
|
|
* You must specify either \ref OSMO_SOCK_F_BIND, or \ref
|
|
* OSMO_SOCK_F_CONNECT, or both.
|
|
*
|
|
* If \ref OSMO_SOCK_F_NONBLOCK is specified, the socket will be set to
|
|
* non-blocking mode.
|
|
*/
|
|
int osmo_sock_init_osa(uint16_t type, uint8_t proto,
|
|
const struct osmo_sockaddr *local,
|
|
const struct osmo_sockaddr *remote,
|
|
unsigned int flags)
|
|
{
|
|
int sfd = -1, rc, on = 1;
|
|
struct osmo_sockaddr_str _sastr = {};
|
|
struct osmo_sockaddr_str *sastr = &_sastr;
|
|
|
|
if ((flags & (OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) == 0) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "invalid: you have to specify either "
|
|
"BIND or CONNECT flags\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((flags & OSMO_SOCK_F_BIND) && !local) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "invalid argument. Cannot BIND when local is NULL\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((flags & OSMO_SOCK_F_CONNECT) && !remote) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "invalid argument. Cannot CONNECT when remote is NULL\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((flags & OSMO_SOCK_F_BIND) &&
|
|
(flags & OSMO_SOCK_F_CONNECT) &&
|
|
local->u.sa.sa_family != remote->u.sa.sa_family) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "invalid: the family for "
|
|
"local and remote endpoint must be same.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* figure out local side of socket */
|
|
if (flags & OSMO_SOCK_F_BIND) {
|
|
sfd = socket_helper_osa(local, type, proto, flags);
|
|
if (sfd < 0) {
|
|
_SOCKADDR_TO_STR(sastr, local);
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "no suitable local addr found for: " OSMO_SOCKADDR_STR_FMT "\n",
|
|
OSMO_SOCKADDR_STR_FMT_ARGS(sastr));
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (proto != IPPROTO_UDP || (flags & OSMO_SOCK_F_UDP_REUSEADDR)) {
|
|
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
|
|
&on, sizeof(on));
|
|
if (rc < 0) {
|
|
int err = errno;
|
|
_SOCKADDR_TO_STR(sastr, local);
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"cannot setsockopt socket: " OSMO_SOCKADDR_STR_FMT ": %s\n",
|
|
OSMO_SOCKADDR_STR_FMT_ARGS(sastr), strerror(err));
|
|
close(sfd);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
if (bind(sfd, &local->u.sa, sizeof(struct osmo_sockaddr)) == -1) {
|
|
int err = errno;
|
|
_SOCKADDR_TO_STR(sastr, local);
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "unable to bind socket: " OSMO_SOCKADDR_STR_FMT ": %s\n",
|
|
OSMO_SOCKADDR_STR_FMT_ARGS(sastr), strerror(err));
|
|
close(sfd);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Reached this point, if OSMO_SOCK_F_BIND then sfd is valid (>=0) or it
|
|
was already closed and func returned. If OSMO_SOCK_F_BIND is not
|
|
set, then sfd = -1 */
|
|
|
|
/* figure out remote side of socket */
|
|
if (flags & OSMO_SOCK_F_CONNECT) {
|
|
if (sfd < 0) {
|
|
sfd = socket_helper_osa(remote, type, proto, flags);
|
|
if (sfd < 0) {
|
|
return sfd;
|
|
}
|
|
}
|
|
|
|
rc = connect(sfd, &remote->u.sa, sizeof(struct osmo_sockaddr));
|
|
if (rc != 0 && errno != EINPROGRESS) {
|
|
int err = errno;
|
|
_SOCKADDR_TO_STR(sastr, remote);
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "unable to connect socket: " OSMO_SOCKADDR_STR_FMT ": %s\n",
|
|
OSMO_SOCKADDR_STR_FMT_ARGS(sastr), strerror(err));
|
|
close(sfd);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
rc = osmo_sock_init_tail(sfd, type, flags);
|
|
if (rc < 0) {
|
|
close(sfd);
|
|
sfd = -1;
|
|
}
|
|
|
|
return sfd;
|
|
}
|
|
|
|
#ifdef HAVE_LIBSCTP
|
|
|
|
/* Check whether there's an addrinfo item in the addrinfo set with an IPv4 or IPv6 option */
|
|
static void addrinfo_has_v4v6addr(const struct addrinfo **result, size_t result_count, bool *has_v4, bool *has_v6)
|
|
{
|
|
size_t host_idx;
|
|
const struct addrinfo *rp;
|
|
*has_v4 = false;
|
|
*has_v6 = false;
|
|
|
|
for (host_idx = 0; host_idx < result_count; host_idx++) {
|
|
for (rp = result[host_idx]; rp != NULL; rp = rp->ai_next) {
|
|
if (result[host_idx]->ai_family == AF_INET)
|
|
*has_v4 = true;
|
|
else if (result[host_idx]->ai_family == AF_INET6)
|
|
*has_v6 = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check whether there's an addrinfo item in the addrinfo set with only an IPv4 or IPv6 option */
|
|
static void addrinfo_has_v4v6only_addr(const struct addrinfo **result, size_t result_count, bool *has_v4only, bool *has_v6only)
|
|
{
|
|
size_t host_idx;
|
|
const struct addrinfo *rp;
|
|
*has_v4only = false;
|
|
*has_v6only = false;
|
|
|
|
for (host_idx = 0; host_idx < result_count; host_idx++) {
|
|
bool has_v4 = false;
|
|
bool has_v6 = false;
|
|
for (rp = result[host_idx]; rp != NULL; rp = rp->ai_next) {
|
|
if (rp->ai_family == AF_INET6)
|
|
has_v6 = true;
|
|
else
|
|
has_v4 = true;
|
|
}
|
|
if (has_v4 && !has_v6)
|
|
*has_v4only = true;
|
|
else if (has_v6 && !has_v4)
|
|
*has_v6only = true;
|
|
}
|
|
}
|
|
|
|
/* Check whether there's an IPv6 with IN6ADDR_ANY_INIT ("::") */
|
|
static bool addrinfo_has_in6addr_any(const struct addrinfo **result, size_t result_count)
|
|
{
|
|
size_t host_idx;
|
|
struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
|
|
const struct addrinfo *rp;
|
|
|
|
for (host_idx = 0; host_idx < result_count; host_idx++) {
|
|
for (rp = result[host_idx]; rp != NULL; rp = rp->ai_next) {
|
|
if (rp->ai_family != AF_INET6)
|
|
continue;
|
|
if (memcmp(&((struct sockaddr_in6 *)rp->ai_addr)->sin6_addr,
|
|
&in6addr_any, sizeof(in6addr_any)) == 0)
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static int socket_helper_multiaddr(uint16_t family, uint16_t type, uint8_t proto, unsigned int flags)
|
|
{
|
|
int sfd, rc;
|
|
|
|
sfd = socket(family, type, proto);
|
|
if (sfd == -1) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"Unable to create socket: %s\n", strerror(errno));
|
|
return sfd;
|
|
}
|
|
|
|
rc = socket_helper_tail(sfd, flags);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
return sfd;
|
|
}
|
|
|
|
/* Build array of addresses taking first addrinfo result of the requested family
|
|
* for each host in addrs_buf. */
|
|
static int addrinfo_to_sockaddr(uint16_t family, const struct addrinfo **result,
|
|
const char **hosts, unsigned int host_cont,
|
|
uint8_t *addrs_buf, size_t addrs_buf_len) {
|
|
size_t host_idx, offset = 0;
|
|
const struct addrinfo *rp;
|
|
|
|
for (host_idx = 0; host_idx < host_cont; host_idx++) {
|
|
/* Addresses are ordered based on RFC 3484, see man getaddrinfo */
|
|
for (rp = result[host_idx]; rp != NULL; rp = rp->ai_next) {
|
|
if (family == AF_UNSPEC || rp->ai_family == family)
|
|
break;
|
|
}
|
|
if (!rp && family == AF_INET6) {
|
|
/* See if we can find an AF_INET addr for the AF_INET6 socket instead: */
|
|
for (rp = result[host_idx]; rp != NULL; rp = rp->ai_next) {
|
|
if (rp->ai_family == AF_INET)
|
|
break;
|
|
}
|
|
}
|
|
if (!rp) { /* No addr could be bound for this host! */
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "No suitable remote address found for host: %s\n",
|
|
hosts[host_idx]);
|
|
return -ENODEV;
|
|
}
|
|
if (offset + rp->ai_addrlen > addrs_buf_len) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "Output buffer to small: %zu\n",
|
|
addrs_buf_len);
|
|
return -ENOSPC;
|
|
}
|
|
memcpy(addrs_buf + offset, rp->ai_addr, rp->ai_addrlen);
|
|
offset += rp->ai_addrlen;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int setsockopt_sctp_auth_supported(int fd, uint32_t val)
|
|
{
|
|
#ifdef SCTP_AUTH_SUPPORTED
|
|
struct sctp_assoc_value assoc_val = {
|
|
.assoc_id = SCTP_FUTURE_ASSOC,
|
|
.assoc_value = val,
|
|
};
|
|
return setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_SUPPORTED, &assoc_val, sizeof(assoc_val));
|
|
#else
|
|
#pragma message "setsockopt(SCTP_AUTH_SUPPORTED) not supported! some SCTP features may not be available!"
|
|
LOGP(DLGLOBAL, LOGL_NOTICE, "Built without support for setsockopt(SCTP_AUTH_SUPPORTED), skipping\n");
|
|
return -ENOTSUP;
|
|
#endif
|
|
}
|
|
|
|
static int setsockopt_sctp_asconf_supported(int fd, uint32_t val)
|
|
{
|
|
#ifdef SCTP_ASCONF_SUPPORTED
|
|
struct sctp_assoc_value assoc_val = {
|
|
.assoc_id = SCTP_FUTURE_ASSOC,
|
|
.assoc_value = val,
|
|
};
|
|
return setsockopt(fd, IPPROTO_SCTP, SCTP_ASCONF_SUPPORTED, &assoc_val, sizeof(assoc_val));
|
|
#else
|
|
#pragma message "setsockopt(SCTP_ASCONF_SUPPORTED) not supported! some SCTP features may not be available!"
|
|
LOGP(DLGLOBAL, LOGL_NOTICE, "Built without support for setsockopt(SCTP_ASCONF_SUPPORTED), skipping\n");
|
|
return -ENOTSUP;
|
|
#endif
|
|
}
|
|
|
|
static int setsockopt_sctp_initmsg(int fd, const struct osmo_sock_init2_multiaddr_pars *pars)
|
|
{
|
|
if (!pars->sctp.sockopt_initmsg.num_ostreams_present &&
|
|
!pars->sctp.sockopt_initmsg.max_instreams_present &&
|
|
!pars->sctp.sockopt_initmsg.max_attempts_present &&
|
|
!pars->sctp.sockopt_initmsg.max_init_timeo_present)
|
|
return 0; /* nothing to set/do */
|
|
|
|
#ifdef SCTP_INITMSG
|
|
struct sctp_initmsg si = {0};
|
|
socklen_t si_len = sizeof(si);
|
|
int rc;
|
|
|
|
/* If at least one field not present, obtain current value from kernel: */
|
|
if (!pars->sctp.sockopt_initmsg.num_ostreams_present ||
|
|
!pars->sctp.sockopt_initmsg.max_instreams_present ||
|
|
!pars->sctp.sockopt_initmsg.max_attempts_present ||
|
|
!pars->sctp.sockopt_initmsg.max_init_timeo_present) {
|
|
rc = getsockopt(fd, IPPROTO_SCTP, SCTP_INITMSG, &si, &si_len);
|
|
if (rc < 0)
|
|
return rc;
|
|
}
|
|
|
|
if (pars->sctp.sockopt_initmsg.num_ostreams_present)
|
|
si.sinit_num_ostreams = pars->sctp.sockopt_initmsg.num_ostreams_value;
|
|
if (pars->sctp.sockopt_initmsg.max_instreams_present)
|
|
si.sinit_max_instreams = pars->sctp.sockopt_initmsg.max_instreams_value;
|
|
if (pars->sctp.sockopt_initmsg.max_attempts_present)
|
|
si.sinit_max_attempts = pars->sctp.sockopt_initmsg.max_attempts_value;
|
|
if (pars->sctp.sockopt_initmsg.max_init_timeo_present)
|
|
si.sinit_max_init_timeo = pars->sctp.sockopt_initmsg.max_init_timeo_value;
|
|
|
|
return setsockopt(fd, IPPROTO_SCTP, SCTP_INITMSG, &si, sizeof(si));
|
|
#else
|
|
#pragma message "setsockopt(SCTP_INITMSG) not supported! some SCTP features may not be available!"
|
|
LOGP(DLGLOBAL, LOGL_NOTICE, "Built without support for setsockopt(SCTP_INITMSG), skipping\n");
|
|
return -ENOTSUP
|
|
#endif
|
|
}
|
|
|
|
/*! Initialize a socket (including bind and/or connect) with multiple local or remote addresses.
|
|
* \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] local_hosts array of char pointers (strings), each containing local host name or IP address in string form
|
|
* \param[in] local_hosts_cnt length of local_hosts (in items)
|
|
* \param[in] local_port local port number in host byte order
|
|
* \param[in] remote_host array of char pointers (strings), each containing remote host name or IP address in string form
|
|
* \param[in] remote_hosts_cnt length of remote_hosts (in items)
|
|
* \param[in] remote_port remote port number in host byte order
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket file descriptor on success; negative on error
|
|
*
|
|
* This function is similar to \ref osmo_sock_init2(), but can be passed an
|
|
* array of local or remote addresses for protocols supporting multiple
|
|
* addresses per socket, like SCTP (currently only one supported). This function
|
|
* should not be used by protocols not supporting this kind of features, but
|
|
* rather \ref osmo_sock_init2() should be used instead.
|
|
* See \ref osmo_sock_init2() for more information on flags and general behavior.
|
|
*/
|
|
int osmo_sock_init2_multiaddr(uint16_t family, uint16_t type, uint8_t proto,
|
|
const char **local_hosts, size_t local_hosts_cnt, uint16_t local_port,
|
|
const char **remote_hosts, size_t remote_hosts_cnt, uint16_t remote_port,
|
|
unsigned int flags)
|
|
{
|
|
return osmo_sock_init2_multiaddr2(family, type, proto, local_hosts, local_hosts_cnt, local_port,
|
|
remote_hosts, remote_hosts_cnt, remote_port, flags, NULL);
|
|
}
|
|
|
|
/*! Initialize a socket (including bind and/or connect) with multiple local or remote addresses.
|
|
* \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] local_hosts array of char pointers (strings), each containing local host name or IP address in string form
|
|
* \param[in] local_hosts_cnt length of local_hosts (in items)
|
|
* \param[in] local_port local port number in host byte order
|
|
* \param[in] remote_host array of char pointers (strings), each containing remote host name or IP address in string form
|
|
* \param[in] remote_hosts_cnt length of remote_hosts (in items)
|
|
* \param[in] remote_port remote port number in host byte order
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \param[in] pars Extra parameters for multi-address specific protocols, such as SCTP. Can be NULL.
|
|
* \returns socket file descriptor on success; negative on error
|
|
*
|
|
* This function is similar to \ref osmo_sock_init2(), but can be passed an
|
|
* array of local or remote addresses for protocols supporting multiple
|
|
* addresses per socket, like SCTP (currently only one supported). This function
|
|
* should not be used by protocols not supporting this kind of features, but
|
|
* rather \ref osmo_sock_init2() should be used instead.
|
|
* See \ref osmo_sock_init2() for more information on flags and general behavior.
|
|
*
|
|
* pars: If "pars" parameter is passed to the function, sctp.version shall be set to 0.
|
|
*/
|
|
int osmo_sock_init2_multiaddr2(uint16_t family, uint16_t type, uint8_t proto,
|
|
const char **local_hosts, size_t local_hosts_cnt, uint16_t local_port,
|
|
const char **remote_hosts, size_t remote_hosts_cnt, uint16_t remote_port,
|
|
unsigned int flags, struct osmo_sock_init2_multiaddr_pars *pars)
|
|
|
|
{
|
|
struct addrinfo *res_loc[OSMO_SOCK_MAX_ADDRS], *res_rem[OSMO_SOCK_MAX_ADDRS];
|
|
int sfd = -1, rc, on = 1;
|
|
unsigned int i;
|
|
bool loc_has_v4addr = false, loc_has_v6addr = false;
|
|
bool rem_has_v4addr = false, rem_has_v6addr = false;
|
|
bool loc_has_v4only_addr, rem_has_v4only_addr;
|
|
bool loc_has_v6only_addr, rem_has_v6only_addr;
|
|
struct sockaddr_in6 addrs_buf[OSMO_SOCK_MAX_ADDRS];
|
|
char strbuf[512];
|
|
|
|
/* TODO: So far this function is only aimed for SCTP, but could be
|
|
reused in the future for other protocols with multi-addr support */
|
|
if (proto != IPPROTO_SCTP)
|
|
return -ENOTSUP;
|
|
|
|
if (pars && pars->sctp.version != 0)
|
|
return -EINVAL;
|
|
|
|
if ((flags & (OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) == 0) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "invalid: you have to specify either "
|
|
"BIND or CONNECT flags\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (((flags & OSMO_SOCK_F_BIND) && !local_hosts_cnt) ||
|
|
((flags & OSMO_SOCK_F_CONNECT) && !remote_hosts_cnt) ||
|
|
local_hosts_cnt > OSMO_SOCK_MAX_ADDRS ||
|
|
remote_hosts_cnt > OSMO_SOCK_MAX_ADDRS)
|
|
return -EINVAL;
|
|
|
|
/* figure out local side of socket */
|
|
if (flags & OSMO_SOCK_F_BIND) {
|
|
rc = addrinfo_helper_multi(res_loc, family, type, proto, local_hosts,
|
|
local_hosts_cnt, local_port, true);
|
|
if (rc < 0)
|
|
return -EINVAL;
|
|
/* Figure out if there's any IPv4 or IPv6 entry in the result set */
|
|
addrinfo_has_v4v6addr((const struct addrinfo **)res_loc, local_hosts_cnt,
|
|
&loc_has_v4addr, &loc_has_v6addr);
|
|
/* Figure out if there's any IPv4-only or IPv6-only addr in the result set */
|
|
addrinfo_has_v4v6only_addr((const struct addrinfo **)res_loc, local_hosts_cnt,
|
|
&loc_has_v4only_addr, &loc_has_v6only_addr);
|
|
if (family == AF_INET && loc_has_v6only_addr) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "Cannot bind an IPv6 address to an AF_INET socket\n");
|
|
rc = -EINVAL;
|
|
goto ret_freeaddrinfo_loc;
|
|
}
|
|
}
|
|
/* figure out remote side of socket */
|
|
if (flags & OSMO_SOCK_F_CONNECT) {
|
|
rc = addrinfo_helper_multi(res_rem, family, type, proto, remote_hosts,
|
|
remote_hosts_cnt, remote_port, false);
|
|
if (rc < 0) {
|
|
rc = -EINVAL;
|
|
goto ret_freeaddrinfo_loc;
|
|
}
|
|
/* Figure out if there's any IPv4 or IPv6 entry in the result set */
|
|
addrinfo_has_v4v6addr((const struct addrinfo **)res_rem, remote_hosts_cnt,
|
|
&rem_has_v4addr, &rem_has_v6addr);
|
|
/* Figure out if there's any IPv4-only or IPv6-only addr in the result set */
|
|
addrinfo_has_v4v6only_addr((const struct addrinfo **)res_rem, remote_hosts_cnt,
|
|
&rem_has_v4only_addr, &rem_has_v6only_addr);
|
|
if (family == AF_INET && rem_has_v6only_addr) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "Cannot connect to an IPv6 address in an AF_INET socket\n");
|
|
rc = -EINVAL;
|
|
goto ret_freeaddrinfo;
|
|
}
|
|
}
|
|
|
|
/* Find out the socket family now if not established by caller:
|
|
* Both are checked here through "or" here to account for "bind flag set,
|
|
* connect flag not set" and viceversa. */
|
|
if (family == AF_UNSPEC) {
|
|
if (!loc_has_v6addr && !rem_has_v6addr)
|
|
family = AF_INET;
|
|
else
|
|
family = AF_INET6;
|
|
}
|
|
|
|
/* if both sets are used, make sure there's at least 1 address of the
|
|
* same type on each set so that SCTP INIT/INIT-ACK can work. */
|
|
if (family == AF_INET6 && ((flags & OSMO_SOCK_F_BIND) && (flags & OSMO_SOCK_F_CONNECT)) &&
|
|
(loc_has_v4addr != rem_has_v4addr || loc_has_v6addr != rem_has_v6addr)) {
|
|
if (!addrinfo_has_in6addr_any((const struct addrinfo **)res_loc, local_hosts_cnt)) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "Invalid v4 vs v6 in local vs remote addresses: "
|
|
"local:%s%s remote:%s%s\n",
|
|
loc_has_v4addr ? " v4" : "", loc_has_v6addr ? " v6" : "",
|
|
rem_has_v4addr ? " v4" : "", rem_has_v6addr ? " v6" : "");
|
|
rc = -EINVAL;
|
|
goto ret_freeaddrinfo;
|
|
}
|
|
}
|
|
|
|
sfd = socket_helper_multiaddr(family, type, proto, flags);
|
|
if (sfd < 0) {
|
|
rc = sfd;
|
|
goto ret_freeaddrinfo;
|
|
}
|
|
|
|
if (pars) {
|
|
if (pars->sctp.sockopt_auth_supported.set) {
|
|
/* RFC 5061 4.2.7: ASCONF also requires AUTH feature. */
|
|
rc = setsockopt_sctp_auth_supported(sfd, pars->sctp.sockopt_auth_supported.value);
|
|
if (rc < 0) {
|
|
int err = errno;
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), local_hosts, local_hosts_cnt);
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"cannot setsockopt(SCTP_AUTH_SUPPORTED) socket: %s:%u: %s\n",
|
|
strbuf, local_port, strerror(err));
|
|
if (pars->sctp.sockopt_auth_supported.abort_on_failure)
|
|
goto ret_close;
|
|
/* do not fail, some features such as Peer Primary Address won't be available
|
|
* unless configured system-wide through sysctl */
|
|
}
|
|
}
|
|
|
|
if (pars->sctp.sockopt_asconf_supported.set) {
|
|
rc = setsockopt_sctp_asconf_supported(sfd, pars->sctp.sockopt_asconf_supported.value);
|
|
if (rc < 0) {
|
|
int err = errno;
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), local_hosts, local_hosts_cnt);
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"cannot setsockopt(SCTP_ASCONF_SUPPORTED) socket: %s:%u: %s\n",
|
|
strbuf, local_port, strerror(err));
|
|
if (pars->sctp.sockopt_asconf_supported.abort_on_failure)
|
|
goto ret_close;
|
|
/* do not fail, some features such as Peer Primary Address won't be available
|
|
* unless configured system-wide through sysctl */
|
|
}
|
|
}
|
|
|
|
if (pars->sctp.sockopt_initmsg.set) {
|
|
rc = setsockopt_sctp_initmsg(sfd, pars);
|
|
if (rc < 0) {
|
|
int err = errno;
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), local_hosts, local_hosts_cnt);
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"cannot setsockopt(SCTP_INITMSG) socket: %s:%u: %s\n",
|
|
strbuf, local_port, strerror(err));
|
|
if (pars->sctp.sockopt_initmsg.abort_on_failure)
|
|
goto ret_close;
|
|
/* do not fail, some parameters will be left as the global default */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (flags & OSMO_SOCK_F_BIND) {
|
|
/* Since so far we only allow IPPROTO_SCTP in this function,
|
|
no need to check below for "proto != IPPROTO_UDP || flags & OSMO_SOCK_F_UDP_REUSEADDR" */
|
|
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
|
|
&on, sizeof(on));
|
|
if (rc < 0) {
|
|
int err = errno;
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), local_hosts, local_hosts_cnt);
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"cannot setsockopt socket:"
|
|
" %s:%u: %s\n",
|
|
strbuf, local_port,
|
|
strerror(err));
|
|
goto ret_close;
|
|
}
|
|
|
|
/* Build array of addresses taking first entry for each host.
|
|
TODO: Ideally we should use backtracking storing last used
|
|
indexes and trying next combination if connect() fails .*/
|
|
/* We could alternatively use v4v6 mapped addresses and call sctp_bindx once with an array od sockaddr_in6 */
|
|
rc = addrinfo_to_sockaddr(family, (const struct addrinfo **)res_loc,
|
|
local_hosts, local_hosts_cnt,
|
|
(uint8_t*)addrs_buf, sizeof(addrs_buf));
|
|
if (rc < 0) {
|
|
rc = -ENODEV;
|
|
goto ret_close;
|
|
}
|
|
|
|
rc = sctp_bindx(sfd, (struct sockaddr *)addrs_buf, local_hosts_cnt, SCTP_BINDX_ADD_ADDR);
|
|
if (rc == -1) {
|
|
int err = errno;
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), local_hosts, local_hosts_cnt);
|
|
LOGP(DLGLOBAL, LOGL_NOTICE, "unable to bind socket: %s:%u: %s\n",
|
|
strbuf, local_port, strerror(err));
|
|
rc = -ENODEV;
|
|
goto ret_close;
|
|
}
|
|
}
|
|
|
|
if (flags & OSMO_SOCK_F_CONNECT) {
|
|
/* Build array of addresses taking first of same family for each host.
|
|
TODO: Ideally we should use backtracking storing last used
|
|
indexes and trying next combination if connect() fails .*/
|
|
rc = addrinfo_to_sockaddr(family, (const struct addrinfo **)res_rem,
|
|
remote_hosts, remote_hosts_cnt,
|
|
(uint8_t*)addrs_buf, sizeof(addrs_buf));
|
|
if (rc < 0) {
|
|
rc = -ENODEV;
|
|
goto ret_close;
|
|
}
|
|
|
|
rc = sctp_connectx(sfd, (struct sockaddr *)addrs_buf, remote_hosts_cnt, NULL);
|
|
if (rc != 0 && errno != EINPROGRESS) {
|
|
int err = errno;
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), remote_hosts, remote_hosts_cnt);
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "unable to connect socket: %s:%u: %s\n",
|
|
strbuf, remote_port, strerror(err));
|
|
rc = -ENODEV;
|
|
goto ret_close;
|
|
}
|
|
}
|
|
|
|
rc = osmo_sock_init_tail(sfd, type, flags);
|
|
if (rc < 0) {
|
|
close(sfd);
|
|
sfd = -1;
|
|
}
|
|
|
|
rc = sfd;
|
|
goto ret_freeaddrinfo;
|
|
|
|
ret_close:
|
|
if (sfd >= 0)
|
|
close(sfd);
|
|
ret_freeaddrinfo:
|
|
if (flags & OSMO_SOCK_F_CONNECT) {
|
|
for (i = 0; i < remote_hosts_cnt; i++)
|
|
freeaddrinfo(res_rem[i]);
|
|
}
|
|
ret_freeaddrinfo_loc:
|
|
if (flags & OSMO_SOCK_F_BIND) {
|
|
for (i = 0; i < local_hosts_cnt; i++)
|
|
freeaddrinfo(res_loc[i]);
|
|
}
|
|
return rc;
|
|
}
|
|
#endif /* HAVE_LIBSCTP */
|
|
|
|
/*! Initialize a socket (including bind/connect)
|
|
* \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] host remote host name or IP address in string form
|
|
* \param[in] port remote port number in host byte order
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket file descriptor on success; negative on error
|
|
*
|
|
* This function creates a new socket of the designated \a family, \a
|
|
* type and \a proto and optionally binds or connects it, depending on
|
|
* the value of \a flags parameter.
|
|
*/
|
|
int osmo_sock_init(uint16_t family, uint16_t type, uint8_t proto,
|
|
const char *host, uint16_t port, unsigned int flags)
|
|
{
|
|
struct addrinfo *result, *rp;
|
|
int sfd = -1; /* initialize to avoid uninitialized false warnings on some gcc versions (11.1.0) */
|
|
int on = 1;
|
|
int rc;
|
|
|
|
if ((flags & (OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) ==
|
|
(OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "invalid: both bind and connect flags set:"
|
|
" %s:%u\n", host, port);
|
|
return -EINVAL;
|
|
}
|
|
|
|
result = addrinfo_helper(family, type, proto, host, port, flags & OSMO_SOCK_F_BIND);
|
|
if (!result)
|
|
return -EINVAL;
|
|
|
|
for (rp = result; rp != NULL; rp = rp->ai_next) {
|
|
sfd = socket_helper(rp, flags);
|
|
if (sfd == -1)
|
|
continue;
|
|
|
|
if (flags & OSMO_SOCK_F_CONNECT) {
|
|
rc = connect(sfd, rp->ai_addr, rp->ai_addrlen);
|
|
if (rc != 0 && errno != EINPROGRESS) {
|
|
close(sfd);
|
|
continue;
|
|
}
|
|
} else {
|
|
if (proto != IPPROTO_UDP || flags & OSMO_SOCK_F_UDP_REUSEADDR) {
|
|
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
|
|
&on, sizeof(on));
|
|
if (rc < 0) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"cannot setsockopt socket:"
|
|
" %s:%u: %s\n",
|
|
host, port, strerror(errno));
|
|
close(sfd);
|
|
continue;
|
|
}
|
|
}
|
|
if (bind(sfd, rp->ai_addr, rp->ai_addrlen) == -1) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "unable to bind socket:"
|
|
"%s:%u: %s\n",
|
|
host, port, strerror(errno));
|
|
close(sfd);
|
|
continue;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
freeaddrinfo(result);
|
|
|
|
if (rp == NULL) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "no suitable addr found for: %s:%u\n",
|
|
host, port);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (proto != IPPROTO_UDP || flags & OSMO_SOCK_F_UDP_REUSEADDR) {
|
|
rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
|
|
if (rc < 0) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR,
|
|
"cannot setsockopt socket: %s:%u: %s\n", host,
|
|
port, strerror(errno));
|
|
close(sfd);
|
|
sfd = -1;
|
|
}
|
|
}
|
|
|
|
rc = osmo_sock_init_tail(sfd, type, flags);
|
|
if (rc < 0) {
|
|
close(sfd);
|
|
sfd = -1;
|
|
}
|
|
|
|
return sfd;
|
|
}
|
|
|
|
/*! fill \ref osmo_fd for a give sfd
|
|
* \param[out] ofd file descriptor (will be filled in)
|
|
* \param[in] sfd socket file descriptor
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket fd on success; negative on error
|
|
*
|
|
* This function fills the \a ofd structure.
|
|
*/
|
|
static inline int osmo_fd_init_ofd(struct osmo_fd *ofd, int sfd, unsigned int flags)
|
|
{
|
|
int rc;
|
|
|
|
if (sfd < 0)
|
|
return sfd;
|
|
|
|
ofd->fd = sfd;
|
|
ofd->when = OSMO_FD_READ;
|
|
|
|
/* if we're doing a non-blocking connect, the completion will be signaled
|
|
* by marking the fd as WRITE-able. So in this exceptional case, we're
|
|
* also interested in when the socket becomes write-able */
|
|
if ((flags & (OSMO_SOCK_F_CONNECT|OSMO_SOCK_F_NONBLOCK)) ==
|
|
(OSMO_SOCK_F_CONNECT|OSMO_SOCK_F_NONBLOCK)) {
|
|
ofd->when |= OSMO_FD_WRITE;
|
|
}
|
|
|
|
rc = osmo_fd_register(ofd);
|
|
if (rc < 0) {
|
|
close(sfd);
|
|
return rc;
|
|
}
|
|
|
|
return sfd;
|
|
}
|
|
|
|
/*! Initialize a socket and fill \ref osmo_fd
|
|
* \param[out] ofd file descriptor (will be filled in)
|
|
* \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] host remote host name or IP address in string form
|
|
* \param[in] port remote port number in host byte order
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket fd on success; negative on error
|
|
*
|
|
* This function creates (and optionall binds/connects) a socket using
|
|
* \ref osmo_sock_init, but also fills the \a ofd structure.
|
|
*/
|
|
int osmo_sock_init_ofd(struct osmo_fd *ofd, int family, int type, int proto,
|
|
const char *host, uint16_t port, unsigned int flags)
|
|
{
|
|
return osmo_fd_init_ofd(ofd, osmo_sock_init(family, type, proto, host, port, flags), flags);
|
|
}
|
|
|
|
/*! Initialize a socket and fill \ref osmo_fd
|
|
* \param[out] ofd file descriptor (will be filled in)
|
|
* \param[in] family Address Family like AF_INET, AF_INET6, AF_UNSPEC
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] local_host local host name or IP address in string form
|
|
* \param[in] local_port local port number in host byte order
|
|
* \param[in] remote_host remote host name or IP address in string form
|
|
* \param[in] remote_port remote port number in host byte order
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket fd on success; negative on error
|
|
*
|
|
* This function creates (and optionall binds/connects) a socket using
|
|
* \ref osmo_sock_init2, but also fills the \a ofd structure.
|
|
*/
|
|
int osmo_sock_init2_ofd(struct osmo_fd *ofd, int family, int type, int proto,
|
|
const char *local_host, uint16_t local_port,
|
|
const char *remote_host, uint16_t remote_port, unsigned int flags)
|
|
{
|
|
return osmo_fd_init_ofd(ofd, osmo_sock_init2(family, type, proto, local_host,
|
|
local_port, remote_host, remote_port, flags), flags);
|
|
}
|
|
|
|
int osmo_sock_init_osa_ofd(struct osmo_fd *ofd, int type, int proto,
|
|
const struct osmo_sockaddr *local,
|
|
const struct osmo_sockaddr *remote, unsigned int flags)
|
|
{
|
|
return osmo_fd_init_ofd(ofd, osmo_sock_init_osa(type, proto, local, remote, flags), flags);
|
|
}
|
|
|
|
/*! Initialize a socket and fill \ref sockaddr
|
|
* \param[out] ss socket address (will be filled in)
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket fd on success; negative on error
|
|
*
|
|
* This function creates (and optionall binds/connects) a socket using
|
|
* \ref osmo_sock_init, but also fills the \a ss structure.
|
|
*/
|
|
int osmo_sock_init_sa(struct sockaddr *ss, uint16_t type,
|
|
uint8_t proto, unsigned int flags)
|
|
{
|
|
char host[NI_MAXHOST];
|
|
uint16_t port;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
int s, sa_len;
|
|
|
|
/* determine port and host from ss */
|
|
switch (ss->sa_family) {
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *) ss;
|
|
sa_len = sizeof(struct sockaddr_in);
|
|
port = ntohs(sin->sin_port);
|
|
break;
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *) ss;
|
|
sa_len = sizeof(struct sockaddr_in6);
|
|
port = ntohs(sin6->sin6_port);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
s = getnameinfo(ss, sa_len, host, NI_MAXHOST,
|
|
NULL, 0, NI_NUMERICHOST);
|
|
if (s != 0) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "getnameinfo failed:"
|
|
" %s\n", strerror(errno));
|
|
return s;
|
|
}
|
|
|
|
return osmo_sock_init(ss->sa_family, type, proto, host, port, flags);
|
|
}
|
|
|
|
#ifdef HAVE_LIBSCTP
|
|
/*! Add addresses to the multi-address (SCTP) socket active binding set
|
|
* \param[in] sfd The multi-address (SCTP) socket
|
|
* \param[in] addrs array of char pointers (strings), each containing local host name or IP address in string form
|
|
* \param[in] addrs_cnt length of addrs_hosts (in items)
|
|
* \returns 0 on success; negative on error
|
|
*
|
|
* This function only supports SCTP sockets so far, and hence it should be
|
|
* called only on socket file descriptions referencing that kind of sockets.
|
|
*/
|
|
int osmo_sock_multiaddr_add_local_addr(int sfd, const char **addrs, size_t addrs_cnt)
|
|
{
|
|
struct osmo_sockaddr osa;
|
|
socklen_t slen = sizeof(osa);
|
|
uint16_t sfd_family;
|
|
uint16_t type = SOCK_STREAM ;/* Fixme: we assume fd is SOCK_STREAM */
|
|
uint8_t proto = IPPROTO_SCTP; /* Fixme: we assume fd is IPPROTO_SCTP */
|
|
struct addrinfo *res[OSMO_SOCK_MAX_ADDRS];
|
|
uint16_t port;
|
|
struct sockaddr_in6 addrs_buf[OSMO_SOCK_MAX_ADDRS];
|
|
unsigned int i;
|
|
int rc;
|
|
bool res_has_v4addr = false, res_has_v6addr = false;
|
|
|
|
rc = getsockname(sfd, &osa.u.sa, &slen);
|
|
if (rc < 0)
|
|
return rc; /* TODO: log error? */
|
|
sfd_family = osa.u.sa.sa_family;
|
|
port = osmo_sockaddr_port(&osa.u.sa);
|
|
|
|
if (sfd_family != AF_INET && sfd_family != AF_INET6)
|
|
return -EINVAL;
|
|
|
|
rc = addrinfo_helper_multi(res, AF_UNSPEC, type, proto, addrs,
|
|
addrs_cnt, port, true);
|
|
if (rc < 0)
|
|
return -EINVAL;
|
|
|
|
addrinfo_has_v4v6addr((const struct addrinfo **)res, addrs_cnt,
|
|
&res_has_v4addr, &res_has_v6addr);
|
|
if (sfd_family == AF_INET && !res_has_v4addr) {
|
|
rc = -EINVAL;
|
|
goto ret_free;
|
|
}
|
|
|
|
uint16_t new_addr_family;
|
|
if (sfd_family == AF_INET)
|
|
new_addr_family = AF_INET;
|
|
else if (sfd_family == AF_INET6 && !res_has_v4addr)
|
|
new_addr_family = AF_INET6;
|
|
else
|
|
new_addr_family = AF_UNSPEC;
|
|
rc = addrinfo_to_sockaddr(new_addr_family, (const struct addrinfo **)res,
|
|
addrs, addrs_cnt,
|
|
(uint8_t *)addrs_buf, sizeof(addrs_buf));
|
|
if (rc < 0) {
|
|
rc = -ENODEV;
|
|
goto ret_free;
|
|
}
|
|
|
|
rc = sctp_bindx(sfd, (struct sockaddr *)addrs_buf, addrs_cnt, SCTP_BINDX_ADD_ADDR);
|
|
if (rc == -1) {
|
|
int err = errno;
|
|
char strbuf[512];
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), addrs, addrs_cnt);
|
|
LOGP(DLGLOBAL, LOGL_NOTICE, "Unable to bind socket to new addresses: %s:%u: %s\n",
|
|
strbuf, port, strerror(err));
|
|
rc = -ENODEV;
|
|
goto ret_free;
|
|
}
|
|
|
|
ret_free:
|
|
for (i = 0; i < addrs_cnt; i++)
|
|
freeaddrinfo(res[i]);
|
|
return rc;
|
|
}
|
|
|
|
/*! Remove addresses from the multi-address (SCTP) socket active binding set
|
|
* \param[in] sfd The multi-address (SCTP) socket
|
|
* \param[in] addrs array of char pointers (strings), each containing local host name or IP address in string form
|
|
* \param[in] addrs_cnt length of addrs_hosts (in items)
|
|
* \returns 0 on success; negative on error
|
|
*
|
|
* This function only supports SCTP sockets so far, and hence it should be
|
|
* called only on socket file descriptions referencing that kind of sockets.
|
|
*/
|
|
int osmo_sock_multiaddr_del_local_addr(int sfd, const char **addrs, size_t addrs_cnt)
|
|
{
|
|
struct osmo_sockaddr osa;
|
|
socklen_t slen = sizeof(osa);
|
|
uint16_t sfd_family;
|
|
uint16_t type = SOCK_STREAM ;/* Fixme: we assume fd is SOCK_STREAM */
|
|
uint8_t proto = IPPROTO_SCTP; /* Fixme: we assume fd is IPPROTO_SCTP */
|
|
struct addrinfo *res[OSMO_SOCK_MAX_ADDRS];
|
|
uint16_t port;
|
|
struct sockaddr_in6 addrs_buf[OSMO_SOCK_MAX_ADDRS];
|
|
unsigned int i;
|
|
int rc;
|
|
bool res_has_v4addr = false, res_has_v6addr = false;
|
|
|
|
rc = getsockname(sfd, &osa.u.sa, &slen);
|
|
if (rc < 0)
|
|
return rc; /* TODO: log error? */
|
|
sfd_family = osa.u.sa.sa_family;
|
|
port = osmo_sockaddr_port(&osa.u.sa);
|
|
|
|
if (sfd_family != AF_INET && sfd_family != AF_INET6)
|
|
return -EINVAL;
|
|
|
|
rc = addrinfo_helper_multi(res, AF_UNSPEC, type, proto, addrs,
|
|
addrs_cnt, port, true);
|
|
if (rc < 0)
|
|
return -EINVAL;
|
|
|
|
addrinfo_has_v4v6addr((const struct addrinfo **)res, addrs_cnt,
|
|
&res_has_v4addr, &res_has_v6addr);
|
|
if (sfd_family == AF_INET && !res_has_v4addr) {
|
|
rc = -EINVAL;
|
|
goto ret_free;
|
|
}
|
|
|
|
uint16_t del_addr_family;
|
|
if (sfd_family == AF_INET)
|
|
del_addr_family = AF_INET;
|
|
else if (sfd_family == AF_INET6 && !res_has_v4addr)
|
|
del_addr_family = AF_INET6;
|
|
else
|
|
del_addr_family = AF_UNSPEC;
|
|
rc = addrinfo_to_sockaddr(del_addr_family, (const struct addrinfo **)res,
|
|
addrs, addrs_cnt,
|
|
(uint8_t *)addrs_buf, sizeof(addrs_buf));
|
|
if (rc < 0) {
|
|
rc = -ENODEV;
|
|
goto ret_free;
|
|
}
|
|
|
|
rc = sctp_bindx(sfd, (struct sockaddr *)addrs_buf, addrs_cnt, SCTP_BINDX_REM_ADDR);
|
|
if (rc == -1) {
|
|
int err = errno;
|
|
char strbuf[512];
|
|
multiaddr_snprintf(strbuf, sizeof(strbuf), addrs, addrs_cnt);
|
|
LOGP(DLGLOBAL, LOGL_NOTICE, "Unable to unbind socket from addresses: %s:%u: %s\n",
|
|
strbuf, port, strerror(err));
|
|
rc = -ENODEV;
|
|
goto ret_free;
|
|
}
|
|
|
|
ret_free:
|
|
for (i = 0; i < addrs_cnt; i++)
|
|
freeaddrinfo(res[i]);
|
|
return rc;
|
|
}
|
|
#endif /* HAVE_LIBSCTP */
|
|
|
|
static int sockaddr_equal(const struct sockaddr *a,
|
|
const struct sockaddr *b, unsigned int len)
|
|
{
|
|
struct sockaddr_in *sin_a, *sin_b;
|
|
struct sockaddr_in6 *sin6_a, *sin6_b;
|
|
|
|
if (a->sa_family != b->sa_family)
|
|
return 0;
|
|
|
|
switch (a->sa_family) {
|
|
case AF_INET:
|
|
sin_a = (struct sockaddr_in *)a;
|
|
sin_b = (struct sockaddr_in *)b;
|
|
if (!memcmp(&sin_a->sin_addr, &sin_b->sin_addr,
|
|
sizeof(struct in_addr)))
|
|
return 1;
|
|
break;
|
|
case AF_INET6:
|
|
sin6_a = (struct sockaddr_in6 *)a;
|
|
sin6_b = (struct sockaddr_in6 *)b;
|
|
if (!memcmp(&sin6_a->sin6_addr, &sin6_b->sin6_addr,
|
|
sizeof(struct in6_addr)))
|
|
return 1;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* linux has a default route:
|
|
local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
|
|
*/
|
|
static int sockaddr_is_local_routed(const struct sockaddr *a)
|
|
{
|
|
#if __linux__
|
|
if (a->sa_family != AF_INET)
|
|
return 0;
|
|
|
|
uint32_t address = ((struct sockaddr_in *)a)->sin_addr.s_addr; /* already BE */
|
|
uint32_t eightmask = htonl(0xff000000); /* /8 mask */
|
|
uint32_t local_prefix_127 = htonl(0x7f000000); /* 127.0.0.0 */
|
|
|
|
if ((address & eightmask) == local_prefix_127)
|
|
return 1;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/*! Determine if the given address is a local address
|
|
* \param[in] addr Socket Address
|
|
* \param[in] addrlen Length of socket address in bytes
|
|
* \returns 1 if address is local, 0 otherwise.
|
|
*/
|
|
int osmo_sockaddr_is_local(struct sockaddr *addr, unsigned int addrlen)
|
|
{
|
|
struct ifaddrs *ifaddr, *ifa;
|
|
|
|
if (sockaddr_is_local_routed(addr))
|
|
return 1;
|
|
|
|
if (getifaddrs(&ifaddr) == -1) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "getifaddrs:"
|
|
" %s\n", strerror(errno));
|
|
return -EIO;
|
|
}
|
|
|
|
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
|
|
if (!ifa->ifa_addr)
|
|
continue;
|
|
if (sockaddr_equal(ifa->ifa_addr, addr, addrlen)) {
|
|
freeifaddrs(ifaddr);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
freeifaddrs(ifaddr);
|
|
return 0;
|
|
}
|
|
|
|
/*! Determine if the given address is an ANY address ("0.0.0.0", "::"). Port is not checked.
|
|
* \param[in] addr Socket Address
|
|
* \param[in] addrlen Length of socket address in bytes
|
|
* \returns 1 if address is ANY, 0 otherwise. -1 is address family not supported/detected.
|
|
*/
|
|
int osmo_sockaddr_is_any(const struct osmo_sockaddr *addr)
|
|
{
|
|
switch (addr->u.sa.sa_family) {
|
|
case AF_INET6: {
|
|
struct in6_addr ip6_any = IN6ADDR_ANY_INIT;
|
|
return memcmp(&addr->u.sin6.sin6_addr,
|
|
&ip6_any, sizeof(ip6_any)) == 0;
|
|
}
|
|
case AF_INET:
|
|
return addr->u.sin.sin_addr.s_addr == INADDR_ANY;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*! Convert sockaddr_in to IP address as char string and port as uint16_t.
|
|
* \param[out] addr String buffer to write IP address to, or NULL.
|
|
* \param[out] addr_len Size of \a addr.
|
|
* \param[out] port Pointer to uint16_t to write the port number to, or NULL.
|
|
* \param[in] sin Sockaddr to convert.
|
|
* \returns the required string buffer size, like osmo_strlcpy(), or 0 if \a addr is NULL.
|
|
*/
|
|
size_t osmo_sockaddr_in_to_str_and_uint(char *addr, unsigned int addr_len, uint16_t *port,
|
|
const struct sockaddr_in *sin)
|
|
{
|
|
if (port)
|
|
*port = ntohs(sin->sin_port);
|
|
|
|
if (addr)
|
|
return osmo_strlcpy(addr, inet_ntoa(sin->sin_addr), addr_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! Convert sockaddr to IP address as char string and port as uint16_t.
|
|
* \param[out] addr String buffer to write IP address to, or NULL.
|
|
* \param[out] addr_len Size of \a addr.
|
|
* \param[out] port Pointer to uint16_t to write the port number to, or NULL.
|
|
* \param[in] sa Sockaddr to convert.
|
|
* \returns the required string buffer size, like osmo_strlcpy(), or 0 if \a addr is NULL.
|
|
*/
|
|
unsigned int osmo_sockaddr_to_str_and_uint(char *addr, unsigned int addr_len, uint16_t *port,
|
|
const struct sockaddr *sa)
|
|
{
|
|
|
|
const struct sockaddr_in6 *sin6;
|
|
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
return osmo_sockaddr_in_to_str_and_uint(addr, addr_len, port,
|
|
(const struct sockaddr_in *)sa);
|
|
case AF_INET6:
|
|
sin6 = (const struct sockaddr_in6 *)sa;
|
|
if (port)
|
|
*port = ntohs(sin6->sin6_port);
|
|
if (addr && inet_ntop(sa->sa_family, &sin6->sin6_addr, addr, addr_len))
|
|
return strlen(addr);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*! inet_ntop() wrapper for a struct sockaddr.
|
|
* \param[in] sa source sockaddr to get the address from.
|
|
* \param[out] dst string buffer of at least INET6_ADDRSTRLEN size.
|
|
* \returns returns a non-null pointer to dst. NULL is returned if there was an
|
|
* error, with errno set to indicate the error.
|
|
*/
|
|
const char *osmo_sockaddr_ntop(const struct sockaddr *sa, char *dst)
|
|
{
|
|
const struct osmo_sockaddr *osa = (const struct osmo_sockaddr *)sa;
|
|
return inet_ntop(osa->u.sa.sa_family,
|
|
osa->u.sa.sa_family == AF_INET6 ?
|
|
(const void *)&osa->u.sin6.sin6_addr :
|
|
(const void *)&osa->u.sin.sin_addr,
|
|
dst, INET6_ADDRSTRLEN);
|
|
}
|
|
|
|
/*! Get sockaddr port content (in host byte order)
|
|
* \param[in] sa source sockaddr to get the port from.
|
|
* \returns returns the sockaddr port in host byte order
|
|
*/
|
|
uint16_t osmo_sockaddr_port(const struct sockaddr *sa)
|
|
{
|
|
const struct osmo_sockaddr *osa = (const struct osmo_sockaddr *)sa;
|
|
switch (osa->u.sa.sa_family) {
|
|
case AF_INET6:
|
|
return ntohs(osa->u.sin6.sin6_port);
|
|
case AF_INET:
|
|
return ntohs(osa->u.sin.sin_port);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*! Set sockaddr port content (to network byte order).
|
|
* \param[out] sa sockaddr to set the port of.
|
|
* \param[in] port port nr to set.
|
|
*/
|
|
void osmo_sockaddr_set_port(struct sockaddr *sa, uint16_t port)
|
|
{
|
|
struct osmo_sockaddr *osa = (struct osmo_sockaddr *)sa;
|
|
switch (osa->u.sa.sa_family) {
|
|
case AF_INET6:
|
|
osa->u.sin6.sin6_port = htons(port);
|
|
return;
|
|
case AF_INET:
|
|
osa->u.sin.sin_port = htons(port);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static unsigned int in6_addr_netmask_to_prefixlen(const struct in6_addr *netmask)
|
|
{
|
|
#if defined(__linux__)
|
|
#define ADDRFIELD(i) s6_addr32[i]
|
|
#else
|
|
#define ADDRFIELD(i) __u6_addr.__u6_addr32[i]
|
|
#endif
|
|
|
|
unsigned int i, j, prefix = 0;
|
|
|
|
for (j = 0; j < 4; j++) {
|
|
uint32_t bits = netmask->ADDRFIELD(j);
|
|
uint8_t *b = (uint8_t *)&bits;
|
|
for (i = 0; i < 4; i++) {
|
|
while (b[i] & 0x80) {
|
|
prefix++;
|
|
b[i] = b[i] << 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
#undef ADDRFIELD
|
|
|
|
return prefix;
|
|
}
|
|
|
|
static unsigned int in_addr_netmask_to_prefixlen(const struct in_addr *netmask)
|
|
{
|
|
uint32_t bits = netmask->s_addr;
|
|
uint8_t *b = (uint8_t *)&bits;
|
|
unsigned int i, prefix = 0;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
while (b[i] & 0x80) {
|
|
prefix++;
|
|
b[i] = b[i] << 1;
|
|
}
|
|
}
|
|
return prefix;
|
|
}
|
|
|
|
/*! Convert netmask to prefix length representation
|
|
* \param[in] netmask sockaddr containing a netmask (consecutive list of 1-bit followed by consecutive list of 0-bit)
|
|
* \returns prefix length representation of the netmask (count of 1-bit from the start of the netmask), negative on error.
|
|
*/
|
|
int osmo_sockaddr_netmask_to_prefixlen(const struct osmo_sockaddr *netmask)
|
|
{
|
|
switch (netmask->u.sa.sa_family) {
|
|
case AF_INET6:
|
|
return in6_addr_netmask_to_prefixlen(&netmask->u.sin6.sin6_addr);
|
|
case AF_INET:
|
|
return in_addr_netmask_to_prefixlen(&netmask->u.sin.sin_addr);
|
|
default:
|
|
return -ENOTSUP;
|
|
}
|
|
}
|
|
|
|
/*! Convert an IP address string (and port number) into a 'struct osmo_sockaddr'.
|
|
* \param[out] osa_out caller-allocated osmo_sockaddr storage
|
|
* \param[in] ipstr IP[v4,v6] address in string format
|
|
* \param[in] port port number (host byte order)
|
|
* \returns 0 on success; negative on error. */
|
|
int osmo_sockaddr_from_str_and_uint(struct osmo_sockaddr *osa_out, const char *ipstr, uint16_t port)
|
|
{
|
|
struct addrinfo *ai = addrinfo_helper(AF_UNSPEC, 0, 0, ipstr, port, true);
|
|
|
|
if (!ai)
|
|
return -EIO;
|
|
|
|
if (ai->ai_addrlen > sizeof(*osa_out))
|
|
return -ENOSPC;
|
|
|
|
memcpy(&osa_out->u.sa, ai->ai_addr, ai->ai_addrlen);
|
|
freeaddrinfo(ai);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! Initialize a unix domain socket (including bind/connect)
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] socket_path path to identify the socket
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket fd on success; negative on error
|
|
*
|
|
* This function creates a new unix domain socket, \a
|
|
* type and \a proto and optionally binds or connects it, depending on
|
|
* the value of \a flags parameter.
|
|
*/
|
|
#if defined(__clang__) && defined(SUN_LEN)
|
|
__attribute__((no_sanitize("undefined")))
|
|
#endif
|
|
int osmo_sock_unix_init(uint16_t type, uint8_t proto,
|
|
const char *socket_path, unsigned int flags)
|
|
{
|
|
struct sockaddr_un local;
|
|
int sfd, rc;
|
|
unsigned int namelen;
|
|
|
|
if ((flags & (OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT)) ==
|
|
(OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT))
|
|
return -EINVAL;
|
|
|
|
local.sun_family = AF_UNIX;
|
|
/* When an AF_UNIX socket is bound, sun_path should be NUL-terminated. See unix(7) man page. */
|
|
if (osmo_strlcpy(local.sun_path, socket_path, sizeof(local.sun_path)) >= sizeof(local.sun_path)) {
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "Socket path exceeds maximum length of %zd bytes: %s\n",
|
|
sizeof(local.sun_path), socket_path);
|
|
return -ENOSPC;
|
|
}
|
|
|
|
#if defined(BSD44SOCKETS) || defined(__UNIXWARE__)
|
|
local.sun_len = strlen(local.sun_path);
|
|
#endif
|
|
#if defined(BSD44SOCKETS) || defined(SUN_LEN)
|
|
namelen = SUN_LEN(&local);
|
|
#else
|
|
namelen = strlen(local.sun_path) +
|
|
offsetof(struct sockaddr_un, sun_path);
|
|
#endif
|
|
|
|
sfd = socket(AF_UNIX, type, proto);
|
|
if (sfd < 0)
|
|
return -errno;
|
|
|
|
if (flags & OSMO_SOCK_F_CONNECT) {
|
|
rc = connect(sfd, (struct sockaddr *)&local, namelen);
|
|
if (rc < 0)
|
|
goto err;
|
|
} else {
|
|
unlink(local.sun_path);
|
|
rc = bind(sfd, (struct sockaddr *)&local, namelen);
|
|
if (rc < 0)
|
|
goto err;
|
|
}
|
|
|
|
rc = socket_helper_tail(sfd, flags);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc = osmo_sock_init_tail(sfd, type, flags);
|
|
if (rc < 0) {
|
|
close(sfd);
|
|
sfd = rc;
|
|
}
|
|
|
|
return sfd;
|
|
err:
|
|
close(sfd);
|
|
return -errno;
|
|
}
|
|
|
|
/*! Initialize a unix domain socket and fill \ref osmo_fd
|
|
* \param[out] ofd file descriptor (will be filled in)
|
|
* \param[in] type Socket type like SOCK_DGRAM, SOCK_STREAM
|
|
* \param[in] proto Protocol like IPPROTO_TCP, IPPROTO_UDP
|
|
* \param[in] socket_path path to identify the socket
|
|
* \param[in] flags flags like \ref OSMO_SOCK_F_CONNECT
|
|
* \returns socket fd on success; negative on error
|
|
*
|
|
* This function creates (and optionally binds/connects) a socket
|
|
* using osmo_sock_unix_init, but also fills the ofd structure.
|
|
*/
|
|
int osmo_sock_unix_init_ofd(struct osmo_fd *ofd, uint16_t type, uint8_t proto,
|
|
const char *socket_path, unsigned int flags)
|
|
{
|
|
return osmo_fd_init_ofd(ofd, osmo_sock_unix_init(type, proto, socket_path, flags), flags);
|
|
}
|
|
|
|
/*! Get the IP and/or port number on socket in separate string buffers.
|
|
* \param[in] fd file descriptor of socket
|
|
* \param[out] ip IP address (will be filled in when not NULL)
|
|
* \param[in] ip_len length of the ip buffer
|
|
* \param[out] port number (will be filled in when not NULL)
|
|
* \param[in] port_len length of the port buffer
|
|
* \param[in] local (true) or remote (false) name will get looked at
|
|
* \returns 0 on success; negative otherwise
|
|
*/
|
|
int osmo_sock_get_ip_and_port(int fd, char *ip, size_t ip_len, char *port, size_t port_len, bool local)
|
|
{
|
|
struct sockaddr_storage sa;
|
|
socklen_t len = sizeof(sa);
|
|
char ipbuf[INET6_ADDRSTRLEN], portbuf[6];
|
|
int rc;
|
|
|
|
rc = local ? getsockname(fd, (struct sockaddr*)&sa, &len) : getpeername(fd, (struct sockaddr*)&sa, &len);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
rc = getnameinfo((const struct sockaddr*)&sa, len, ipbuf, sizeof(ipbuf),
|
|
portbuf, sizeof(portbuf),
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
if (ip)
|
|
strncpy(ip, ipbuf, ip_len);
|
|
if (port)
|
|
strncpy(port, portbuf, port_len);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef HAVE_LIBSCTP
|
|
/*! Get multiple IP addresses and/or port number on socket in separate string buffers
|
|
* \param[in] fd file descriptor of socket.
|
|
* \param[out] ip_proto IPPROTO of the socket, eg: IPPROTO_SCTP.
|
|
* \param[out] ip Pointer to memory holding consecutive buffers of size ip_len.
|
|
* \param[out] ip_cnt length ip array pointer. on return it contains the number of addresses found.
|
|
* \param[in] ip_len length of each of the string buffer in the the ip array.
|
|
* \param[out] port number (will be filled in when not NULL).
|
|
* \param[in] port_len length of the port buffer.
|
|
* \param[in] local (true) or remote (false) name will get looked at.
|
|
* \returns 0 on success; negative otherwise.
|
|
*
|
|
* Upon return, ip_cnt can be set to a higher value than the one set by the
|
|
* caller. This can be used by the caller to find out the required array length
|
|
* and then obtaining by calling the function twice. Only up to ip_cnt addresses
|
|
* are filed in, as per the value provided by the caller.
|
|
*
|
|
* Usage example retrieving all (up to OSMO_SOCK_MAX_ADDRS, 32) bound IP addresses and bound port:
|
|
* char hostbuf[OSMO_SOCK_MAX_ADDRS][INET6_ADDRSTRLEN];
|
|
* size_t num_hostbuf = ARRAY_SIZE(hostbuf);
|
|
* char portbuf[6];
|
|
* rc = osmo_sock_multiaddr_get_ip_and_port(fd, IPPROTO_SCTP, &hostbuf[0][0], &num_hostbuf,
|
|
* sizeof(hostbuf[0]), portbuf, sizeof(portbuf), true);
|
|
* if (rc < 0)
|
|
* goto error;
|
|
* if (num_hostbuf > ARRAY_SIZE(hostbuf))
|
|
* goto not_enough_buffers;
|
|
*/
|
|
int osmo_sock_multiaddr_get_ip_and_port(int fd, int ip_proto, char *ip, size_t *ip_cnt, size_t ip_len,
|
|
char *port, size_t port_len, bool local)
|
|
{
|
|
struct sockaddr *addrs = NULL;
|
|
unsigned int n_addrs, i;
|
|
void *addr_buf;
|
|
int rc;
|
|
|
|
switch (ip_proto) {
|
|
case IPPROTO_SCTP:
|
|
break; /* continue below */
|
|
default:
|
|
if (*ip_cnt == 0) {
|
|
*ip_cnt = 1;
|
|
return 0;
|
|
}
|
|
*ip_cnt = 1;
|
|
return osmo_sock_get_ip_and_port(fd, ip, ip_len, port, port_len, local);
|
|
}
|
|
|
|
rc = local ? sctp_getladdrs(fd, 0, &addrs) : sctp_getpaddrs(fd, 0, &addrs);
|
|
if (rc < 0)
|
|
return rc;
|
|
if (rc == 0)
|
|
return -ENOTCONN;
|
|
|
|
n_addrs = rc;
|
|
addr_buf = (void *)addrs;
|
|
for (i = 0; i < n_addrs; i++) {
|
|
struct sockaddr *sa_addr = (struct sockaddr *)addr_buf;
|
|
size_t addrlen;
|
|
|
|
if (i >= *ip_cnt)
|
|
break;
|
|
|
|
switch (sa_addr->sa_family) {
|
|
case AF_INET:
|
|
addrlen = sizeof(struct sockaddr_in);
|
|
break;
|
|
case AF_INET6:
|
|
addrlen = sizeof(struct sockaddr_in6);
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
goto free_addrs_ret;
|
|
}
|
|
|
|
rc = getnameinfo(sa_addr, addrlen, &ip[i * ip_len], ip_len,
|
|
port, port_len,
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
if (rc < 0)
|
|
goto free_addrs_ret;
|
|
addr_buf += addrlen;
|
|
}
|
|
|
|
*ip_cnt = n_addrs;
|
|
rc = 0;
|
|
free_addrs_ret:
|
|
local ? sctp_freeladdrs(addrs) : sctp_freepaddrs(addrs);
|
|
return rc;
|
|
}
|
|
#endif
|
|
|
|
/*! Get local IP address on socket
|
|
* \param[in] fd file descriptor of socket
|
|
* \param[out] ip IP address (will be filled in)
|
|
* \param[in] len length of the output buffer
|
|
* \returns 0 on success; negative otherwise
|
|
*/
|
|
int osmo_sock_get_local_ip(int fd, char *ip, size_t len)
|
|
{
|
|
return osmo_sock_get_ip_and_port(fd, ip, len, NULL, 0, true);
|
|
}
|
|
|
|
/*! Get local port on socket
|
|
* \param[in] fd file descriptor of socket
|
|
* \param[out] port number (will be filled in)
|
|
* \param[in] len length of the output buffer
|
|
* \returns 0 on success; negative otherwise
|
|
*/
|
|
int osmo_sock_get_local_ip_port(int fd, char *port, size_t len)
|
|
{
|
|
return osmo_sock_get_ip_and_port(fd, NULL, 0, port, len, true);
|
|
}
|
|
|
|
/*! Get remote IP address on socket
|
|
* \param[in] fd file descriptor of socket
|
|
* \param[out] ip IP address (will be filled in)
|
|
* \param[in] len length of the output buffer
|
|
* \returns 0 on success; negative otherwise
|
|
*/
|
|
int osmo_sock_get_remote_ip(int fd, char *ip, size_t len)
|
|
{
|
|
return osmo_sock_get_ip_and_port(fd, ip, len, NULL, 0, false);
|
|
}
|
|
|
|
/*! Get remote port on socket
|
|
* \param[in] fd file descriptor of socket
|
|
* \param[out] port number (will be filled in)
|
|
* \param[in] len length of the output buffer
|
|
* \returns 0 on success; negative otherwise
|
|
*/
|
|
int osmo_sock_get_remote_ip_port(int fd, char *port, size_t len)
|
|
{
|
|
return osmo_sock_get_ip_and_port(fd, NULL, 0, port, len, false);
|
|
}
|
|
|
|
/*! Get address/port information on socket in dyn-alloc string like "(r=1.2.3.4:5<->l=6.7.8.9:10)".
|
|
* Usually, it is better to use osmo_sock_get_name2() for a static string buffer or osmo_sock_get_name_buf() for a
|
|
* caller provided string buffer, to avoid the dynamic talloc allocation.
|
|
* \param[in] ctx talloc context from which to allocate string buffer
|
|
* \param[in] fd file descriptor of socket
|
|
* \returns string identifying the connection of this socket, talloc'd from ctx.
|
|
*/
|
|
char *osmo_sock_get_name(const void *ctx, int fd)
|
|
{
|
|
char str[OSMO_SOCK_NAME_MAXLEN];
|
|
int rc;
|
|
rc = osmo_sock_get_name_buf(str, sizeof(str), fd);
|
|
if (rc <= 0)
|
|
return NULL;
|
|
return talloc_asprintf(ctx, "(%s)", str);
|
|
}
|
|
|
|
#ifdef HAVE_LIBSCTP
|
|
/*! Format multiple IP addresses and/or port number into a combined string buffer
|
|
* \param[out] str Destination string buffer.
|
|
* \param[in] str_len sizeof(str), usually OSMO_SOCK_MULTIADDR_PEER_STR_MAXLEN.
|
|
* \param[out] ip Pointer to memory holding ip_cnt consecutive buffers of size ip_len.
|
|
* \param[out] ip_cnt length ip array pointer. on return it contains the number of addresses found.
|
|
* \param[in] ip_len length of each of the string buffer in the the ip array.
|
|
* \param[out] port number (will be printed in when not NULL).
|
|
* \return String length as returned by snprintf(), or negative on error.
|
|
*
|
|
* This API expects an ip array as the one filled in by
|
|
* osmo_sock_multiaddr_get_ip_and_port(), and hence it's a good companion for
|
|
* that API.
|
|
*/
|
|
int osmo_multiaddr_ip_and_port_snprintf(char *str, size_t str_len,
|
|
const char *ip, size_t ip_cnt, size_t ip_len,
|
|
const char *portbuf)
|
|
{
|
|
struct osmo_strbuf sb = { .buf = str, .len = str_len };
|
|
bool is_v6 = false;
|
|
unsigned int i;
|
|
|
|
if (ip_cnt == 0) {
|
|
OSMO_STRBUF_PRINTF(sb, "NULL:%s", portbuf);
|
|
return sb.chars_needed;
|
|
}
|
|
if (ip_cnt > 1)
|
|
OSMO_STRBUF_PRINTF(sb, "(");
|
|
else if ((is_v6 = !!strchr(&ip[0], ':'))) /* IPv6, add [] to separate from port. */
|
|
OSMO_STRBUF_PRINTF(sb, "[");
|
|
|
|
for (i = 0; i < ip_cnt - 1; i++)
|
|
OSMO_STRBUF_PRINTF(sb, "%s|", &ip[i * ip_len]);
|
|
OSMO_STRBUF_PRINTF(sb, "%s", &ip[i * ip_len]);
|
|
|
|
if (ip_cnt > 1)
|
|
OSMO_STRBUF_PRINTF(sb, ")");
|
|
else if (is_v6)
|
|
OSMO_STRBUF_PRINTF(sb, "]");
|
|
if (portbuf)
|
|
OSMO_STRBUF_PRINTF(sb, ":%s", portbuf);
|
|
|
|
return sb.chars_needed;
|
|
}
|
|
|
|
/*! Get address/port information on socket in provided string buffer, like "r=1.2.3.4:5<->l=6.7.8.9:10".
|
|
* This does not include braces like osmo_sock_get_name().
|
|
* \param[out] str Destination string buffer.
|
|
* \param[in] str_len sizeof(str), usually OSMO_SOCK_MULTIADDR_NAME_MAXLEN.
|
|
* \param[in] fd File descriptor of socket.
|
|
* \param[in] fd IPPROTO of the socket, eg: IPPROTO_SCTP.
|
|
* \return String length as returned by snprintf(), or negative on error.
|
|
*/
|
|
int osmo_sock_multiaddr_get_name_buf(char *str, size_t str_len, int fd, int sk_proto)
|
|
{
|
|
char hostbuf[OSMO_SOCK_MAX_ADDRS][INET6_ADDRSTRLEN];
|
|
size_t num_hostbuf = ARRAY_SIZE(hostbuf);
|
|
char portbuf[6];
|
|
struct osmo_strbuf sb = { .buf = str, .len = str_len };
|
|
|
|
if (fd < 0) {
|
|
osmo_strlcpy(str, "<error-bad-fd>", str_len);
|
|
return sb.chars_needed;
|
|
}
|
|
|
|
switch (sk_proto) {
|
|
case IPPROTO_SCTP:
|
|
break; /* continue below */
|
|
default:
|
|
return osmo_sock_get_name_buf(str, str_len, fd);
|
|
}
|
|
|
|
/* get remote */
|
|
OSMO_STRBUF_PRINTF(sb, "r=");
|
|
if (osmo_sock_multiaddr_get_ip_and_port(fd, sk_proto, &hostbuf[0][0], &num_hostbuf,
|
|
sizeof(hostbuf[0]), portbuf, sizeof(portbuf), false) != 0) {
|
|
OSMO_STRBUF_PRINTF(sb, "NULL");
|
|
} else {
|
|
const bool need_more_bufs = num_hostbuf > ARRAY_SIZE(hostbuf);
|
|
if (need_more_bufs)
|
|
num_hostbuf = ARRAY_SIZE(hostbuf);
|
|
OSMO_STRBUF_APPEND(sb, osmo_multiaddr_ip_and_port_snprintf,
|
|
&hostbuf[0][0], num_hostbuf, sizeof(hostbuf[0]), portbuf);
|
|
if (need_more_bufs)
|
|
OSMO_STRBUF_PRINTF(sb, "<need-more-bufs!>");
|
|
}
|
|
|
|
OSMO_STRBUF_PRINTF(sb, "<->l=");
|
|
|
|
/* get local */
|
|
num_hostbuf = ARRAY_SIZE(hostbuf);
|
|
if (osmo_sock_multiaddr_get_ip_and_port(fd, sk_proto, &hostbuf[0][0], &num_hostbuf,
|
|
sizeof(hostbuf[0]), portbuf, sizeof(portbuf), true) != 0) {
|
|
OSMO_STRBUF_PRINTF(sb, "NULL");
|
|
} else {
|
|
const bool need_more_bufs = num_hostbuf > ARRAY_SIZE(hostbuf);
|
|
if (need_more_bufs)
|
|
num_hostbuf = ARRAY_SIZE(hostbuf);
|
|
OSMO_STRBUF_APPEND(sb, osmo_multiaddr_ip_and_port_snprintf,
|
|
&hostbuf[0][0], num_hostbuf, sizeof(hostbuf[0]), portbuf);
|
|
if (need_more_bufs)
|
|
OSMO_STRBUF_PRINTF(sb, "<need-more-bufs!>");
|
|
}
|
|
|
|
return sb.chars_needed;
|
|
}
|
|
#endif
|
|
|
|
/*! Get address/port information on socket in provided string buffer, like "r=1.2.3.4:5<->l=6.7.8.9:10".
|
|
* This does not include braces like osmo_sock_get_name().
|
|
* \param[out] str Destination string buffer.
|
|
* \param[in] str_len sizeof(str).
|
|
* \param[in] fd File descriptor of socket.
|
|
* \return String length as returned by snprintf(), or negative on error.
|
|
*/
|
|
int osmo_sock_get_name_buf(char *str, size_t str_len, int fd)
|
|
{
|
|
struct osmo_strbuf sb = { .buf = str, .len = str_len };
|
|
struct osmo_sockaddr osa;
|
|
struct sockaddr_un *sun;
|
|
socklen_t len;
|
|
int rc;
|
|
|
|
if (fd < 0) {
|
|
osmo_strlcpy(str, "<error-bad-fd>", str_len);
|
|
return -EBADF;
|
|
}
|
|
|
|
|
|
len = sizeof(osa.u.sas);
|
|
rc = getsockname(fd, &osa.u.sa, &len);
|
|
if (rc < 0) {
|
|
osmo_strlcpy(str, "<error-in-getsockname>", str_len);
|
|
return rc;
|
|
}
|
|
|
|
switch (osa.u.sa.sa_family) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
{
|
|
char hostbuf_l[INET6_ADDRSTRLEN], hostbuf_r[INET6_ADDRSTRLEN];
|
|
char portbuf_l[6], portbuf_r[6];
|
|
|
|
len = sizeof(osa.u.sas);
|
|
rc = getnameinfo(&osa.u.sa, len, hostbuf_l, sizeof(hostbuf_l),
|
|
portbuf_l, sizeof(portbuf_l),
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
if (rc < 0) {
|
|
osmo_strlcpy(str, "<error-in-getnameinfo>", str_len);
|
|
return rc;
|
|
}
|
|
/* Now attempt to get remote: */
|
|
len = sizeof(osa.u.sas);
|
|
rc = getpeername(fd, &osa.u.sa, &len);
|
|
if (rc < 0) {
|
|
OSMO_STRBUF_PRINTF(sb, "r=NULL<->l=%s:%s", hostbuf_l, portbuf_l);
|
|
return sb.chars_needed;
|
|
}
|
|
len = sizeof(osa.u.sas);
|
|
rc = getnameinfo(&osa.u.sa, len, hostbuf_r, sizeof(hostbuf_r),
|
|
portbuf_r, sizeof(portbuf_r),
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
if (rc < 0) {
|
|
OSMO_STRBUF_PRINTF(sb, "r=NULL<->l=%s:%s", hostbuf_l, portbuf_l);
|
|
return sb.chars_needed;
|
|
}
|
|
OSMO_STRBUF_PRINTF(sb, "r=%s:%s<->l=%s:%s", hostbuf_r, portbuf_r, hostbuf_l, portbuf_l);
|
|
return sb.chars_needed;
|
|
}
|
|
case AF_UNIX:
|
|
{
|
|
unsigned long long remote_pid;
|
|
bool have_remote_pid;
|
|
#if defined(SO_PEERCRED)
|
|
struct ucred ucred;
|
|
len = sizeof(struct ucred);
|
|
if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &len) == -1) {
|
|
have_remote_pid = false;
|
|
} else {
|
|
have_remote_pid = true;
|
|
remote_pid = (unsigned long long)ucred.pid;
|
|
}
|
|
#else
|
|
#pragma message "SO_PEERCRED not available"
|
|
have_remote_pid = false;
|
|
#endif
|
|
/* Make sure sun_path is NULL terminated: */
|
|
sun = (struct sockaddr_un *)&osa.u.sa;
|
|
sun->sun_path[sizeof(sun->sun_path) - 1] = '\0';
|
|
if (have_remote_pid)
|
|
OSMO_STRBUF_PRINTF(sb, "r=%llu<->", remote_pid);
|
|
else
|
|
OSMO_STRBUF_PRINTF(sb, "r=NULL<->");
|
|
OSMO_STRBUF_PRINTF(sb, "l=%s:%d", sun->sun_path, fd);
|
|
return sb.chars_needed;
|
|
}
|
|
default:
|
|
osmo_strlcpy(str, "<socket-family-no-supported>", str_len);
|
|
return -ENOTSUP;
|
|
}
|
|
}
|
|
|
|
/*! Get address/port information on socket in static string, like "r=1.2.3.4:5<->l=6.7.8.9:10".
|
|
* This does not include braces like osmo_sock_get_name().
|
|
* \param[in] fd File descriptor of socket.
|
|
* \return Static string buffer containing the result.
|
|
*/
|
|
const char *osmo_sock_get_name2(int fd)
|
|
{
|
|
static __thread char str[OSMO_SOCK_NAME_MAXLEN];
|
|
osmo_sock_get_name_buf(str, sizeof(str), fd);
|
|
return str;
|
|
}
|
|
|
|
/*! Get address/port information on socket in static string, like "r=1.2.3.4:5<->l=6.7.8.9:10".
|
|
* This does not include braces like osmo_sock_get_name().
|
|
* \param[in] fd File descriptor of socket.
|
|
* \return Static string buffer containing the result.
|
|
*/
|
|
char *osmo_sock_get_name2_c(const void *ctx, int fd)
|
|
{
|
|
char *str = talloc_size(ctx, OSMO_SOCK_NAME_MAXLEN);
|
|
if (!str)
|
|
return NULL;
|
|
osmo_sock_get_name_buf(str, OSMO_SOCK_NAME_MAXLEN, fd);
|
|
return str;
|
|
}
|
|
|
|
static int sock_get_domain(int fd)
|
|
{
|
|
int domain;
|
|
#ifdef SO_DOMAIN
|
|
socklen_t dom_len = sizeof(domain);
|
|
int rc;
|
|
|
|
rc = getsockopt(fd, SOL_SOCKET, SO_DOMAIN, &domain, &dom_len);
|
|
if (rc < 0)
|
|
return rc;
|
|
#else
|
|
/* This of course sucks, but what shall we do on OSs like
|
|
* FreeBSD that don't seem to expose a method by which one can
|
|
* learn the address family of a socket? */
|
|
domain = AF_INET;
|
|
#endif
|
|
return domain;
|
|
}
|
|
|
|
|
|
/*! Activate or de-activate local loop-back of transmitted multicast packets
|
|
* \param[in] fd file descriptor of related socket
|
|
* \param[in] enable Enable (true) or disable (false) loop-back
|
|
* \returns 0 on success; negative otherwise */
|
|
int osmo_sock_mcast_loop_set(int fd, bool enable)
|
|
{
|
|
int domain, loop = 0;
|
|
|
|
if (enable)
|
|
loop = 1;
|
|
|
|
domain = sock_get_domain(fd);
|
|
if (domain < 0)
|
|
return domain;
|
|
|
|
switch (domain) {
|
|
case AF_INET:
|
|
return setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop));
|
|
case AF_INET6:
|
|
return setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &loop, sizeof(loop));
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*! Set the TTL of outbound multicast packets
|
|
* \param[in] fd file descriptor of related socket
|
|
* \param[in] ttl TTL of to-be-sent multicast packets
|
|
* \returns 0 on success; negative otherwise */
|
|
int osmo_sock_mcast_ttl_set(int fd, uint8_t ttl)
|
|
{
|
|
int domain, ttli = ttl;
|
|
|
|
domain = sock_get_domain(fd);
|
|
if (domain < 0)
|
|
return domain;
|
|
|
|
switch (domain) {
|
|
case AF_INET:
|
|
return setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttli, sizeof(ttli));
|
|
case AF_INET6:
|
|
return setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttli, sizeof(ttli));
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*! Set the network device to which we should bind the multicast socket
|
|
* \param[in] fd file descriptor of related socket
|
|
* \param[in] ifname name of network interface to user for multicast
|
|
* \returns 0 on success; negative otherwise */
|
|
int osmo_sock_mcast_iface_set(int fd, const char *ifname)
|
|
{
|
|
unsigned int ifindex;
|
|
struct ip_mreqn mr;
|
|
|
|
/* first, resolve interface name to ifindex */
|
|
ifindex = if_nametoindex(ifname);
|
|
if (ifindex == 0)
|
|
return -errno;
|
|
|
|
/* next, configure kernel to use that ifindex for this sockets multicast traffic */
|
|
memset(&mr, 0, sizeof(mr));
|
|
mr.imr_ifindex = ifindex;
|
|
return setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, &mr, sizeof(mr));
|
|
}
|
|
|
|
|
|
/*! Enable/disable receiving all multicast packets, even for non-subscribed groups
|
|
* \param[in] fd file descriptor of related socket
|
|
* \param[in] enable Enable or Disable receiving of all packets
|
|
* \returns 0 on success; negative otherwise */
|
|
int osmo_sock_mcast_all_set(int fd, bool enable)
|
|
{
|
|
int domain, all = 0;
|
|
|
|
if (enable)
|
|
all = 1;
|
|
|
|
domain = sock_get_domain(fd);
|
|
if (domain < 0)
|
|
return domain;
|
|
|
|
switch (domain) {
|
|
case AF_INET:
|
|
#ifdef IP_MULTICAST_ALL
|
|
return setsockopt(fd, IPPROTO_IP, IP_MULTICAST_ALL, &all, sizeof(all));
|
|
#endif
|
|
case AF_INET6:
|
|
/* there seems no equivalent ?!? */
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* FreeBSD calls the socket option differently */
|
|
#if !defined(IPV6_ADD_MEMBERSHIP) && defined(IPV6_JOIN_GROUP)
|
|
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
|
|
#endif
|
|
|
|
/*! Subscribe to the given IP multicast group
|
|
* \param[in] fd file descriptor of related scoket
|
|
* \param[in] grp_addr ASCII representation of the multicast group address
|
|
* \returns 0 on success; negative otherwise */
|
|
int osmo_sock_mcast_subscribe(int fd, const char *grp_addr)
|
|
{
|
|
int rc, domain;
|
|
struct ip_mreq mreq;
|
|
struct ipv6_mreq mreq6;
|
|
struct in6_addr i6a;
|
|
|
|
domain = sock_get_domain(fd);
|
|
if (domain < 0)
|
|
return domain;
|
|
|
|
switch (domain) {
|
|
case AF_INET:
|
|
memset(&mreq, 0, sizeof(mreq));
|
|
mreq.imr_multiaddr.s_addr = inet_addr(grp_addr);
|
|
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
|
|
return setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
|
|
#ifdef IPV6_ADD_MEMBERSHIP
|
|
case AF_INET6:
|
|
memset(&mreq6, 0, sizeof(mreq6));
|
|
rc = inet_pton(AF_INET6, grp_addr, (void *)&i6a);
|
|
if (rc < 0)
|
|
return -EINVAL;
|
|
mreq6.ipv6mr_multiaddr = i6a;
|
|
return setsockopt(fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6));
|
|
#endif
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*! Determine the matching local IP-address for a given remote IP-Address.
|
|
* \param[out] local_ip caller provided memory for resulting local IP-address
|
|
* \param[in] remote_ip remote IP-address
|
|
* \returns 0 on success; negative otherwise
|
|
*
|
|
* The function accepts IPv4 and IPv6 address strings. The caller must provide
|
|
* at least INET6_ADDRSTRLEN bytes for local_ip if an IPv6 is expected as
|
|
* as result. For IPv4 addresses the required amount is INET_ADDRSTRLEN. */
|
|
int osmo_sock_local_ip(char *local_ip, const char *remote_ip)
|
|
{
|
|
int sfd;
|
|
int rc;
|
|
struct addrinfo addrinfo_hint;
|
|
struct addrinfo *addrinfo = NULL;
|
|
struct sockaddr_storage local_addr;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
socklen_t local_addr_len;
|
|
uint16_t family;
|
|
|
|
/* Find out the address family (AF_INET or AF_INET6?) */
|
|
memset(&addrinfo_hint, '\0', sizeof(addrinfo_hint));
|
|
addrinfo_hint.ai_family = AF_UNSPEC;
|
|
addrinfo_hint.ai_flags = AI_NUMERICHOST;
|
|
rc = getaddrinfo(remote_ip, NULL, &addrinfo_hint, &addrinfo);
|
|
if (rc)
|
|
return -EINVAL;
|
|
family = addrinfo->ai_family;
|
|
freeaddrinfo(addrinfo);
|
|
|
|
/* Connect a dummy socket to trick the kernel into determining the
|
|
* ip-address of the interface that would be used if we would send
|
|
* out an actual packet */
|
|
sfd = osmo_sock_init2(family, SOCK_DGRAM, IPPROTO_UDP, NULL, 0, remote_ip, 0, OSMO_SOCK_F_CONNECT);
|
|
if (sfd < 0)
|
|
return -EINVAL;
|
|
|
|
/* Request the IP address of the interface that the kernel has
|
|
* actually choosen. */
|
|
memset(&local_addr, 0, sizeof(local_addr));
|
|
local_addr_len = sizeof(local_addr);
|
|
rc = getsockname(sfd, (struct sockaddr *)&local_addr, &local_addr_len);
|
|
close(sfd);
|
|
if (rc < 0)
|
|
return -EINVAL;
|
|
|
|
switch (local_addr.ss_family) {
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in*)&local_addr;
|
|
if (!inet_ntop(AF_INET, &sin->sin_addr, local_ip, INET_ADDRSTRLEN))
|
|
return -EINVAL;
|
|
break;
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6*)&local_addr;
|
|
if (!inet_ntop(AF_INET6, &sin6->sin6_addr, local_ip, INET6_ADDRSTRLEN))
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! Determine the matching local address for a given remote address.
|
|
* \param[out] local_ip caller provided memory for resulting local address
|
|
* \param[in] remote_ip remote address
|
|
* \returns 0 on success; negative otherwise
|
|
*/
|
|
int osmo_sockaddr_local_ip(struct osmo_sockaddr *local_ip, const struct osmo_sockaddr *remote_ip)
|
|
{
|
|
int sfd;
|
|
int rc;
|
|
socklen_t local_ip_len;
|
|
|
|
sfd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, NULL, remote_ip, OSMO_SOCK_F_CONNECT);
|
|
if (sfd < 0)
|
|
return -EINVAL;
|
|
|
|
memset(local_ip, 0, sizeof(*local_ip));
|
|
local_ip_len = sizeof(*local_ip);
|
|
rc = getsockname(sfd, (struct sockaddr *)local_ip, &local_ip_len);
|
|
close(sfd);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*! Copy the addr part, the IP address octets in network byte order, to a buffer.
|
|
* Useful for encoding network protocols.
|
|
* \param[out] dst Write octets to this buffer.
|
|
* \param[in] dst_maxlen Space available in buffer.
|
|
* \param[in] os Sockaddr to copy IP of.
|
|
* \return nr of octets written on success, negative on error.
|
|
*/
|
|
int osmo_sockaddr_to_octets(uint8_t *dst, size_t dst_maxlen, const struct osmo_sockaddr *os)
|
|
{
|
|
const void *addr;
|
|
size_t len;
|
|
switch (os->u.sa.sa_family) {
|
|
case AF_INET:
|
|
addr = &os->u.sin.sin_addr;
|
|
len = sizeof(os->u.sin.sin_addr);
|
|
break;
|
|
case AF_INET6:
|
|
addr = &os->u.sin6.sin6_addr;
|
|
len = sizeof(os->u.sin6.sin6_addr);
|
|
break;
|
|
default:
|
|
return -ENOTSUP;
|
|
}
|
|
if (dst_maxlen < len)
|
|
return -ENOSPC;
|
|
memcpy(dst, addr, len);
|
|
return len;
|
|
}
|
|
|
|
/*! Copy the addr part, the IP address octets in network byte order, from a buffer.
|
|
* Useful for decoding network protocols.
|
|
* \param[out] os Write IP address to this sockaddr.
|
|
* \param[in] src Source buffer to read IP address octets from.
|
|
* \param[in] src_len Number of octets to copy.
|
|
* \return number of octets read on success, negative on error.
|
|
*/
|
|
int osmo_sockaddr_from_octets(struct osmo_sockaddr *os, const void *src, size_t src_len)
|
|
{
|
|
void *addr;
|
|
size_t len;
|
|
*os = (struct osmo_sockaddr){0};
|
|
switch (src_len) {
|
|
case sizeof(os->u.sin.sin_addr):
|
|
os->u.sa.sa_family = AF_INET;
|
|
addr = &os->u.sin.sin_addr;
|
|
len = sizeof(os->u.sin.sin_addr);
|
|
break;
|
|
case sizeof(os->u.sin6.sin6_addr):
|
|
os->u.sin6.sin6_family = AF_INET6;
|
|
addr = &os->u.sin6.sin6_addr;
|
|
len = sizeof(os->u.sin6.sin6_addr);
|
|
break;
|
|
default:
|
|
return -ENOTSUP;
|
|
}
|
|
memcpy(addr, src, len);
|
|
return len;
|
|
}
|
|
|
|
/*! Compare two osmo_sockaddr.
|
|
* \param[in] a
|
|
* \param[in] b
|
|
* \return 0 if a and b are equal. Otherwise it follows memcmp()
|
|
*/
|
|
int osmo_sockaddr_cmp(const struct osmo_sockaddr *a,
|
|
const struct osmo_sockaddr *b)
|
|
{
|
|
if (a == b)
|
|
return 0;
|
|
if (!a)
|
|
return 1;
|
|
if (!b)
|
|
return -1;
|
|
|
|
if (a->u.sa.sa_family != b->u.sa.sa_family) {
|
|
return OSMO_CMP(a->u.sa.sa_family, b->u.sa.sa_family);
|
|
}
|
|
|
|
switch (a->u.sa.sa_family) {
|
|
case AF_INET:
|
|
return memcmp(&a->u.sin, &b->u.sin, sizeof(struct sockaddr_in));
|
|
case AF_INET6:
|
|
return memcmp(&a->u.sin6, &b->u.sin6, sizeof(struct sockaddr_in6));
|
|
default:
|
|
/* fallback to memcmp for remaining AF over the full osmo_sockaddr length */
|
|
return memcmp(a, b, sizeof(struct osmo_sockaddr));
|
|
}
|
|
}
|
|
|
|
/*! string-format a given osmo_sockaddr address
|
|
* \param[in] sockaddr the osmo_sockaddr to print
|
|
* \return pointer to the string on success; NULL on error
|
|
*/
|
|
const char *osmo_sockaddr_to_str(const struct osmo_sockaddr *sockaddr)
|
|
{
|
|
/* INET6_ADDRSTRLEN contains already a null termination,
|
|
* adding '[' ']' ':' '16 bit port' */
|
|
static __thread char buf[INET6_ADDRSTRLEN + 8];
|
|
return osmo_sockaddr_to_str_buf(buf, sizeof(buf), sockaddr);
|
|
}
|
|
|
|
/*! string-format a given osmo_sockaddr address into a user-supplied buffer.
|
|
* Same as osmo_sockaddr_to_str_buf() but returns a would-be length in snprintf() style.
|
|
* \param[in] buf user-supplied output buffer
|
|
* \param[in] buf_len size of the user-supplied output buffer in bytes
|
|
* \param[in] sockaddr the osmo_sockaddr to print
|
|
* \return number of characters that would be written if the buffer is large enough, like snprintf().
|
|
*/
|
|
int osmo_sockaddr_to_str_buf2(char *buf, size_t buf_len, const struct osmo_sockaddr *sockaddr)
|
|
{
|
|
struct osmo_strbuf sb = { .buf = buf, .len = buf_len };
|
|
uint16_t port = 0;
|
|
|
|
if (!sockaddr) {
|
|
OSMO_STRBUF_PRINTF(sb, "NULL");
|
|
return sb.chars_needed;
|
|
}
|
|
|
|
switch (sockaddr->u.sa.sa_family) {
|
|
case AF_INET:
|
|
OSMO_STRBUF_APPEND(sb, osmo_sockaddr_to_str_and_uint, &port, &sockaddr->u.sa);
|
|
if (port)
|
|
OSMO_STRBUF_PRINTF(sb, ":%u", port);
|
|
break;
|
|
case AF_INET6:
|
|
OSMO_STRBUF_PRINTF(sb, "[");
|
|
OSMO_STRBUF_APPEND(sb, osmo_sockaddr_to_str_and_uint, &port, &sockaddr->u.sa);
|
|
OSMO_STRBUF_PRINTF(sb, "]");
|
|
if (port)
|
|
OSMO_STRBUF_PRINTF(sb, ":%u", port);
|
|
break;
|
|
default:
|
|
OSMO_STRBUF_PRINTF(sb, "unsupported family %d", sockaddr->u.sa.sa_family);
|
|
break;
|
|
}
|
|
|
|
return sb.chars_needed;
|
|
}
|
|
|
|
/*! string-format a given osmo_sockaddr address into a talloc allocated buffer.
|
|
* Like osmo_sockaddr_to_str_buf2() but returns a talloc allocated string.
|
|
* \param[in] ctx talloc context to allocate from, e.g. OTC_SELECT.
|
|
* \param[in] sockaddr the osmo_sockaddr to print.
|
|
* \return human readable string.
|
|
*/
|
|
char *osmo_sockaddr_to_str_c(void *ctx, const struct osmo_sockaddr *sockaddr)
|
|
{
|
|
OSMO_NAME_C_IMPL(ctx, 64, "ERROR", osmo_sockaddr_to_str_buf2, sockaddr)
|
|
}
|
|
|
|
/*! string-format a given osmo_sockaddr address into a user-supplied buffer.
|
|
* Like osmo_sockaddr_to_str_buf2() but returns buf, or NULL if too short.
|
|
* \param[in] buf user-supplied output buffer
|
|
* \param[in] buf_len size of the user-supplied output buffer in bytes
|
|
* \param[in] sockaddr the osmo_sockaddr to print
|
|
* \return pointer to the string on success; NULL on error
|
|
*/
|
|
char *osmo_sockaddr_to_str_buf(char *buf, size_t buf_len,
|
|
const struct osmo_sockaddr *sockaddr)
|
|
{
|
|
int chars_needed = osmo_sockaddr_to_str_buf2(buf, buf_len, sockaddr);
|
|
if (chars_needed >= buf_len)
|
|
return NULL;
|
|
return buf;
|
|
}
|
|
|
|
/*! Set the DSCP (differentiated services code point) of a socket.
|
|
* \param[in] dscp DSCP value in range 0..63
|
|
* \returns 0 on success; negative on error. */
|
|
int osmo_sock_set_dscp(int fd, uint8_t dscp)
|
|
{
|
|
struct sockaddr_storage local_addr;
|
|
socklen_t local_addr_len = sizeof(local_addr);
|
|
uint8_t tos;
|
|
socklen_t tos_len = sizeof(tos);
|
|
int tclass;
|
|
socklen_t tclass_len = sizeof(tclass);
|
|
int rc;
|
|
|
|
/* DSCP is a 6-bit value stored in the upper 6 bits of the 8-bit TOS */
|
|
if (dscp > 63)
|
|
return -EINVAL;
|
|
|
|
rc = getsockname(fd, (struct sockaddr *)&local_addr, &local_addr_len);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
switch (local_addr.ss_family) {
|
|
case AF_INET:
|
|
/* read the original value */
|
|
rc = getsockopt(fd, IPPROTO_IP, IP_TOS, &tos, &tos_len);
|
|
if (rc < 0)
|
|
return rc;
|
|
/* mask-in the DSCP into the upper 6 bits */
|
|
tos &= 0x03;
|
|
tos |= dscp << 2;
|
|
/* and write it back to the kernel */
|
|
rc = setsockopt(fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
|
|
break;
|
|
case AF_INET6:
|
|
/* read the original value */
|
|
rc = getsockopt(fd, IPPROTO_IPV6, IPV6_TCLASS, &tclass, &tclass_len);
|
|
if (rc < 0)
|
|
return rc;
|
|
/* mask-in the DSCP into the upper 6 bits */
|
|
tclass &= 0x03;
|
|
tclass |= dscp << 2;
|
|
/* and write it back to the kernel */
|
|
rc = setsockopt(fd, IPPROTO_IPV6, IPV6_TCLASS, &tclass, sizeof(tclass));
|
|
break;
|
|
case AF_UNSPEC:
|
|
default:
|
|
LOGP(DLGLOBAL, LOGL_ERROR, "No DSCP support for socket family %u\n",
|
|
local_addr.ss_family);
|
|
rc = -1;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*! Set the priority value of a socket.
|
|
* \param[in] prio priority value. Values outside 0..6 require CAP_NET_ADMIN.
|
|
* \returns 0 on success; negative on error. */
|
|
int osmo_sock_set_priority(int fd, int prio)
|
|
{
|
|
/* and write it back to the kernel */
|
|
return setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio));
|
|
}
|
|
|
|
#ifdef HAVE_LIBSCTP
|
|
/*! Fill in array of struct sctp_paddrinfo with each of the remote addresses of an SCTP socket
|
|
* \param[in] fd file descriptor of SCTP socket
|
|
* \param[out] pinfo Pointer to memory holding an array of struct sctp_paddrinfo (pinfo_cnt length).
|
|
* \param[in,out] pinfo_cnt length of pinfo array (in elements). On return it contains the number of addresses found.
|
|
* \returns 0 on success; negative otherwise
|
|
*
|
|
* Upon return, pinfo_cnt can be set to a higher value than the one set by the
|
|
* caller. This can be used by the caller to find out the required array length
|
|
* and then obtaining by calling the function twice. Only up to pinfo_cnt addresses
|
|
* are filled in, as per the value provided by the caller.
|
|
*
|
|
* Usage example retrieving struct sctp_paddrinfo for all (up to OSMO_SOCK_MAX_ADDRS, 32) remote IP addresses:
|
|
* struct sctp_paddrinfo pinfo[OSMO_SOCK_MAX_ADDRS];
|
|
* size_t pinfo_cnt = ARRAY_SIZE(pinfo);
|
|
* rc = osmo_sock_sctp_get_peer_addr_info(fd, &pinfo[0], &num_hostbuf, pinfo_cnt);
|
|
* if (rc < 0)
|
|
* goto error;
|
|
* if (pinfo_cnt > ARRAY_SIZE(hostbuf))
|
|
* goto not_enough_buffers;
|
|
*/
|
|
int osmo_sock_sctp_get_peer_addr_info(int fd, struct sctp_paddrinfo *pinfo, size_t *pinfo_cnt)
|
|
{
|
|
struct sockaddr *addrs = NULL;
|
|
unsigned int n_addrs, i;
|
|
void *addr_buf;
|
|
int rc;
|
|
socklen_t optlen;
|
|
|
|
rc = sctp_getpaddrs(fd, 0, &addrs);
|
|
|
|
if (rc < 0)
|
|
return rc;
|
|
if (rc == 0)
|
|
return -ENOTCONN;
|
|
|
|
n_addrs = rc;
|
|
addr_buf = (void *)addrs;
|
|
for (i = 0; i < n_addrs; i++) {
|
|
struct sockaddr *sa_addr = (struct sockaddr *)addr_buf;
|
|
size_t addrlen;
|
|
|
|
switch (sa_addr->sa_family) {
|
|
case AF_INET:
|
|
addrlen = sizeof(struct sockaddr_in);
|
|
break;
|
|
case AF_INET6:
|
|
addrlen = sizeof(struct sockaddr_in6);
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
goto free_addrs_ret;
|
|
}
|
|
|
|
if (i >= *pinfo_cnt) {
|
|
addr_buf += addrlen;
|
|
continue;
|
|
}
|
|
|
|
memset(&pinfo[i], 0, sizeof(pinfo[0]));
|
|
memcpy(&pinfo[i].spinfo_address, sa_addr, addrlen);
|
|
optlen = sizeof(pinfo[0]);
|
|
rc = getsockopt(fd, SOL_SCTP, SCTP_GET_PEER_ADDR_INFO, &pinfo[i], &optlen);
|
|
if (rc < 0)
|
|
goto free_addrs_ret;
|
|
|
|
addr_buf += addrlen;
|
|
}
|
|
|
|
*pinfo_cnt = n_addrs;
|
|
rc = 0;
|
|
free_addrs_ret:
|
|
sctp_freepaddrs(addrs);
|
|
return rc;
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAVE_SYS_SOCKET_H */
|
|
|
|
/*! @} */
|