957 lines
22 KiB
C
957 lines
22 KiB
C
/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "config.h"
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#include <sofia-sip/su_addrinfo.h>
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#include <sofia-sip/su.h>
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#ifndef IN_LOOPBACKNET
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#define IN_LOOPBACKNET 127
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#endif
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#ifndef IN_EXPERIMENTAL
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#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
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#endif
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#if !HAVE_GETADDRINFO
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#include <string.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <ctype.h>
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/*
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* "#ifdef FAITH" part is local hack for supporting IPv4-v6 translator.
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*
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* Issues to be discussed:
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* - Thread safe-ness must be checked.
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* - Return values. There are nonstandard return values defined and used
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* in the source code. This is because RFC2133 is silent about which error
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* code must be returned for which situation.
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* - PF_UNSPEC case would be handled in getipnodebyname() with the AI_ALL flag.
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*/
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#if defined(__KAME__) && defined(INET6)
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# define FAITH
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#endif
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#define SUCCESS 0
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#define GAI_ANY 0
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#define YES 1
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#define NO 0
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#undef SU_HAVE_IN6
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#ifdef FAITH
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static int translate = NO;
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static struct in6_addr faith_prefix = IN6ADDR_GAI_ANY_INIT;
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#endif
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static const char in_addrany[] = { 0, 0, 0, 0 };
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static const char in6_addrany[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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static const char in_loopback[] = { 127, 0, 0, 1 };
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static const char in6_loopback[] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
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};
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struct sockinet {
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u_char si_len;
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u_char si_family;
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u_short si_port;
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};
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static struct gai_afd {
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int a_af;
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int a_addrlen;
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int a_socklen;
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int a_off;
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const char *a_addrany;
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const char *a_loopback;
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} gai_afdl [] = {
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#if SU_HAVE_IN6
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#define N_INET6 0
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{PF_INET6, sizeof(struct in6_addr),
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sizeof(struct sockaddr_in6),
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offsetof(struct sockaddr_in6, sin6_addr),
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in6_addrany, in6_loopback},
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#define N_INET 1
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#else
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#define N_INET 0
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#endif
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{PF_INET, sizeof(struct in_addr),
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sizeof(struct sockaddr_in),
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offsetof(struct sockaddr_in, sin_addr),
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in_addrany, in_loopback},
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{0, 0, 0, 0, NULL, NULL},
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};
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#if SU_HAVE_IN6
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#define PTON_MAX 16
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#else
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#define PTON_MAX 4
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#endif
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#if SU_HAVE_IN6 && !defined(s6_addr8)
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# define s6_addr8 s6_addr
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#endif
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#if !SU_HAVE_IN6
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#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
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#else
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extern int h_errno;
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#endif
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#endif
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static int get_name(const char *, struct gai_afd *,
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struct addrinfo **, char *, struct addrinfo *,
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int);
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static int get_addr(const char *, int, struct addrinfo **,
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struct addrinfo *, int);
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static int str_isnumber(const char *);
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#define GET_CANONNAME(ai, str) \
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if (pai->ai_flags & AI_CANONNAME) {\
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if (((ai)->ai_canonname = (char *)malloc(strlen(str) + 1)) != NULL) {\
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strcpy((ai)->ai_canonname, (str));\
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} else {\
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error = EAI_MEMORY;\
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goto free;\
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}\
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}
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#if SU_HAVE_SOCKADDR_SA_LEN
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#define GET_AI(ai, gai_afd, addr, port) {\
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char *p;\
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if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\
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((gai_afd)->a_socklen)))\
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== NULL) goto free;\
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memcpy(ai, pai, sizeof(struct addrinfo));\
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(ai)->ai_addr = (struct sockaddr *)((ai) + 1);\
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memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\
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(ai)->ai_addr->sa_len = (ai)->ai_addrlen = (gai_afd)->a_socklen;\
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(ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\
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((struct sockinet *)(ai)->ai_addr)->si_port = port;\
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p = (char *)((ai)->ai_addr);\
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memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\
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}
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#else
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#define GET_AI(ai, gai_afd, addr, port) {\
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char *p;\
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if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\
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((gai_afd)->a_socklen)))\
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== NULL) goto free;\
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memcpy(ai, pai, sizeof(struct addrinfo));\
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(ai)->ai_addr = (struct sockaddr *)((ai) + 1);\
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memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\
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(ai)->ai_addrlen = (gai_afd)->a_socklen; \
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(ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\
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((struct sockinet *)(ai)->ai_addr)->si_port = port;\
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p = (char *)((ai)->ai_addr);\
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memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\
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}
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#endif
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#define ERR(err) { error = (err); goto bad; }
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static int
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str_isnumber(p)
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const char *p;
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{
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char *q = (char *)p;
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while (*q) {
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if (! isdigit(*q))
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return NO;
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q++;
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}
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return YES;
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}
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static
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int
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getaddrinfo(hostname, servname, hints, res)
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const char *hostname, *servname;
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const struct addrinfo *hints;
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struct addrinfo **res;
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{
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struct addrinfo sentinel;
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struct addrinfo *top = NULL;
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struct addrinfo *cur;
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int i, error = 0;
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char pton[PTON_MAX];
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struct addrinfo ai;
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struct addrinfo *pai;
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u_short port;
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#ifdef FAITH
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static int firsttime = 1;
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if (firsttime) {
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/* translator hack */
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{
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char *q = getenv("GAI");
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if (q && inet_pton(AF_INET6, q, &faith_prefix) == 1)
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translate = YES;
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}
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firsttime = 0;
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}
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#endif
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/* initialize file static vars */
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sentinel.ai_next = NULL;
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cur = &sentinel;
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pai = &ai;
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pai->ai_flags = 0;
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pai->ai_family = PF_UNSPEC;
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pai->ai_socktype = GAI_ANY;
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pai->ai_protocol = GAI_ANY;
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pai->ai_addrlen = 0;
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pai->ai_canonname = NULL;
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pai->ai_addr = NULL;
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pai->ai_next = NULL;
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port = GAI_ANY;
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if (hostname == NULL && servname == NULL)
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return EAI_NONAME;
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if (hints) {
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/* error check for hints */
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if (hints->ai_addrlen || hints->ai_canonname ||
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hints->ai_addr || hints->ai_next)
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ERR(EAI_BADHINTS); /* xxx */
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if (hints->ai_flags & ~AI_MASK)
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ERR(EAI_BADFLAGS);
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switch (hints->ai_family) {
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case PF_UNSPEC:
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case PF_INET:
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#if SU_HAVE_IN6
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case PF_INET6:
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#endif
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break;
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default:
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ERR(EAI_FAMILY);
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}
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memcpy(pai, hints, sizeof(*pai));
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switch (pai->ai_socktype) {
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case GAI_ANY:
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switch (pai->ai_protocol) {
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case GAI_ANY:
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break;
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case IPPROTO_UDP:
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pai->ai_socktype = SOCK_DGRAM;
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break;
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case IPPROTO_TCP:
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pai->ai_socktype = SOCK_STREAM;
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break;
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#if HAVE_SCTP
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case IPPROTO_SCTP:
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pai->ai_socktype = SOCK_STREAM;
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break;
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#endif
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default:
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pai->ai_socktype = SOCK_RAW;
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break;
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}
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break;
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case SOCK_RAW:
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break;
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case SOCK_DGRAM:
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if (pai->ai_protocol != IPPROTO_UDP &&
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#if HAVE_SCTP
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pai->ai_protocol != IPPROTO_SCTP &&
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#endif
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pai->ai_protocol != GAI_ANY)
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ERR(EAI_BADHINTS); /*xxx*/
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if (pai->ai_protocol == GAI_ANY)
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pai->ai_protocol = IPPROTO_UDP;
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break;
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case SOCK_STREAM:
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if (pai->ai_protocol != IPPROTO_TCP &&
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#if HAVE_SCTP
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pai->ai_protocol != IPPROTO_SCTP &&
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#endif
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pai->ai_protocol != GAI_ANY)
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ERR(EAI_BADHINTS); /*xxx*/
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if (pai->ai_protocol == GAI_ANY)
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pai->ai_protocol = IPPROTO_TCP;
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break;
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#if HAVE_SCTP
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case SOCK_SEQPACKET:
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if (pai->ai_protocol != IPPROTO_SCTP &&
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pai->ai_protocol != GAI_ANY)
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ERR(EAI_BADHINTS); /*xxx*/
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if (pai->ai_protocol == GAI_ANY)
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pai->ai_protocol = IPPROTO_SCTP;
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break;
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#endif
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default:
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ERR(EAI_SOCKTYPE);
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break;
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}
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}
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/*
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* service port
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*/
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if (servname) {
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if (str_isnumber(servname)) {
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if (pai->ai_socktype == GAI_ANY) {
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/* caller accept *GAI_ANY* socktype */
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pai->ai_socktype = SOCK_DGRAM;
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pai->ai_protocol = IPPROTO_UDP;
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}
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port = htons(atoi(servname));
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} else {
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struct servent *sp;
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char *proto;
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proto = NULL;
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switch (pai->ai_socktype) {
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case GAI_ANY:
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proto = NULL;
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break;
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case SOCK_DGRAM:
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proto = "udp";
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break;
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case SOCK_STREAM:
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proto = "tcp";
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break;
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default:
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fprintf(stderr, "panic!\n");
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break;
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}
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if ((sp = getservbyname(servname, proto)) == NULL)
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ERR(EAI_SERVICE);
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port = sp->s_port;
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if (pai->ai_socktype == GAI_ANY) {
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if (strcmp(sp->s_proto, "udp") == 0) {
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pai->ai_socktype = SOCK_DGRAM;
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pai->ai_protocol = IPPROTO_UDP;
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} else if (strcmp(sp->s_proto, "tcp") == 0) {
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pai->ai_socktype = SOCK_STREAM;
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pai->ai_protocol = IPPROTO_TCP;
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#if HAVE_SCTP
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} else if (strcmp(sp->s_proto, "sctp") == 0) {
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pai->ai_socktype = SOCK_STREAM;
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pai->ai_protocol = IPPROTO_SCTP;
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#endif
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} else
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ERR(EAI_PROTOCOL); /*xxx*/
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}
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}
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}
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/*
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* hostname == NULL.
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* passive socket -> anyaddr (0.0.0.0 or ::)
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* non-passive socket -> localhost (127.0.0.1 or ::1)
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*/
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if (hostname == NULL) {
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struct gai_afd *gai_afd;
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for (gai_afd = &gai_afdl[0]; gai_afd->a_af; gai_afd++) {
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if (!(pai->ai_family == PF_UNSPEC
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|| pai->ai_family == gai_afd->a_af)) {
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continue;
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}
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if (pai->ai_flags & AI_PASSIVE) {
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GET_AI(cur->ai_next, gai_afd, gai_afd->a_addrany, port);
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/* xxx meaningless?
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* GET_CANONNAME(cur->ai_next, "anyaddr");
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*/
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} else {
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GET_AI(cur->ai_next, gai_afd, gai_afd->a_loopback,
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port);
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/* xxx meaningless?
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* GET_CANONNAME(cur->ai_next, "localhost");
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*/
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}
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cur = cur->ai_next;
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}
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top = sentinel.ai_next;
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if (top)
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goto good;
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else
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ERR(EAI_FAMILY);
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}
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/* hostname as numeric name */
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for (i = 0; gai_afdl[i].a_af; i++) {
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if (inet_pton(gai_afdl[i].a_af, hostname, pton)) {
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u_long v4a;
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u_char pfx;
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switch (gai_afdl[i].a_af) {
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case AF_INET:
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v4a = ((struct in_addr *)pton)->s_addr;
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if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
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pai->ai_flags &= ~AI_CANONNAME;
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v4a >>= IN_CLASSA_NSHIFT;
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if (v4a == 0 || v4a == IN_LOOPBACKNET)
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pai->ai_flags &= ~AI_CANONNAME;
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break;
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#if SU_HAVE_IN6
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case AF_INET6:
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pfx = ((struct in6_addr *)pton)->s6_addr8[0];
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if (pfx == 0 || pfx == 0xfe || pfx == 0xff)
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pai->ai_flags &= ~AI_CANONNAME;
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break;
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#endif
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}
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if (pai->ai_family == gai_afdl[i].a_af ||
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pai->ai_family == PF_UNSPEC) {
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if (! (pai->ai_flags & AI_CANONNAME)) {
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GET_AI(top, &gai_afdl[i], pton, port);
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goto good;
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}
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/*
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* if AI_CANONNAME and if reverse lookup
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* fail, return ai anyway to pacify
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* calling application.
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*
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* XXX getaddrinfo() is a name->address
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* translation function, and it looks strange
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* that we do addr->name translation here.
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*/
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get_name(pton, &gai_afdl[i], &top, pton, pai, port);
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goto good;
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} else
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ERR(EAI_FAMILY); /*xxx*/
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}
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}
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if (pai->ai_flags & AI_NUMERICHOST)
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ERR(EAI_NONAME);
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/* hostname as alphabetical name */
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error = get_addr(hostname, pai->ai_family, &top, pai, port);
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if (error == 0) {
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if (top) {
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good:
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*res = top;
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return SUCCESS;
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} else
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error = EAI_FAIL;
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}
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free:
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if (top)
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freeaddrinfo(top);
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bad:
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*res = NULL;
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return error;
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}
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static int
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get_name(addr, gai_afd, res, numaddr, pai, port0)
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const char *addr;
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struct gai_afd *gai_afd;
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struct addrinfo **res;
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char *numaddr;
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struct addrinfo *pai;
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int port0;
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{
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u_short port = port0 & 0xffff;
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struct hostent *hp;
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struct addrinfo *cur;
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int error = 0, h_error;
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#if SU_HAVE_IN6
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hp = getipnodebyaddr(addr, gai_afd->a_addrlen, gai_afd->a_af, &h_error);
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#else
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hp = gethostbyaddr(addr, gai_afd->a_addrlen, AF_INET);
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#endif
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if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
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GET_AI(cur, gai_afd, hp->h_addr_list[0], port);
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GET_CANONNAME(cur, hp->h_name);
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} else
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GET_AI(cur, gai_afd, numaddr, port);
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#if SU_HAVE_IN6
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if (hp)
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freehostent(hp);
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#endif
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*res = cur;
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return SUCCESS;
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free:
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if (cur)
|
|
freeaddrinfo(cur);
|
|
#if SU_HAVE_IN6
|
|
if (hp)
|
|
freehostent(hp);
|
|
#endif
|
|
/* bad: */
|
|
*res = NULL;
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
get_addr(hostname, af, res, pai, port0)
|
|
const char *hostname;
|
|
int af;
|
|
struct addrinfo **res;
|
|
struct addrinfo *pai;
|
|
int port0;
|
|
{
|
|
u_short port = port0 & 0xffff;
|
|
struct addrinfo sentinel;
|
|
struct hostent *hp;
|
|
struct addrinfo *top, *cur;
|
|
struct gai_afd *gai_afd;
|
|
int i, error = 0, h_error;
|
|
char *ap;
|
|
|
|
top = NULL;
|
|
sentinel.ai_next = NULL;
|
|
cur = &sentinel;
|
|
#if SU_HAVE_IN6
|
|
if (af == AF_UNSPEC) {
|
|
hp = getipnodebyname(hostname, AF_INET6,
|
|
AI_ADDRCONFIG|AI_ALL|AI_V4MAPPED, &h_error);
|
|
} else
|
|
hp = getipnodebyname(hostname, af, AI_ADDRCONFIG, &h_error);
|
|
#else
|
|
hp = gethostbyname(hostname);
|
|
h_error = h_errno;
|
|
#endif
|
|
if (hp == NULL) {
|
|
switch (h_error) {
|
|
case HOST_NOT_FOUND:
|
|
case NO_DATA:
|
|
error = EAI_NODATA;
|
|
break;
|
|
case TRY_AGAIN:
|
|
error = EAI_AGAIN;
|
|
break;
|
|
case NO_RECOVERY:
|
|
default:
|
|
error = EAI_FAIL;
|
|
break;
|
|
}
|
|
goto bad;
|
|
}
|
|
|
|
if ((hp->h_name == NULL) || (hp->h_name[0] == 0) ||
|
|
(hp->h_addr_list[0] == NULL))
|
|
ERR(EAI_FAIL);
|
|
|
|
for (i = 0; (ap = hp->h_addr_list[i]) != NULL; i++) {
|
|
switch (af) {
|
|
#if SU_HAVE_IN6
|
|
case AF_INET6:
|
|
gai_afd = &gai_afdl[N_INET6];
|
|
break;
|
|
#endif
|
|
#ifndef INET6
|
|
default: /* AF_UNSPEC */
|
|
#endif
|
|
case AF_INET:
|
|
gai_afd = &gai_afdl[N_INET];
|
|
break;
|
|
#if SU_HAVE_IN6
|
|
default: /* AF_UNSPEC */
|
|
if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)ap)) {
|
|
ap += sizeof(struct in6_addr) -
|
|
sizeof(struct in_addr);
|
|
gai_afd = &gai_afdl[N_INET];
|
|
} else
|
|
gai_afd = &gai_afdl[N_INET6];
|
|
break;
|
|
#endif
|
|
}
|
|
#ifdef FAITH
|
|
if (translate && gai_afd->a_af == AF_INET) {
|
|
struct in6_addr *in6;
|
|
|
|
GET_AI(cur->ai_next, &gai_afdl[N_INET6], ap, port);
|
|
in6 = &((struct sockaddr_in6 *)cur->ai_next->ai_addr)->sin6_addr;
|
|
memcpy(&in6->s6_addr32[0], &faith_prefix,
|
|
sizeof(struct in6_addr) - sizeof(struct in_addr));
|
|
memcpy(&in6->s6_addr32[3], ap, sizeof(struct in_addr));
|
|
} else
|
|
#endif /* FAITH */
|
|
GET_AI(cur->ai_next, gai_afd, ap, port);
|
|
if (cur == &sentinel) {
|
|
top = cur->ai_next;
|
|
GET_CANONNAME(top, hp->h_name);
|
|
}
|
|
cur = cur->ai_next;
|
|
}
|
|
#if SU_HAVE_IN6
|
|
freehostent(hp);
|
|
#endif
|
|
*res = top;
|
|
return SUCCESS;
|
|
free:
|
|
if (top)
|
|
freeaddrinfo(top);
|
|
#if SU_HAVE_IN6
|
|
if (hp)
|
|
freehostent(hp);
|
|
#endif
|
|
bad:
|
|
*res = NULL;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Issues to be discussed:
|
|
* - Thread safe-ness must be checked
|
|
* - Return values. There seems to be no standard for return value (RFC2133)
|
|
* but INRIA implementation returns EAI_xxx defined for getaddrinfo().
|
|
*/
|
|
|
|
#define SUCCESS 0
|
|
#define YES 1
|
|
#define NO 0
|
|
|
|
static struct gni_afd {
|
|
int a_af;
|
|
int a_addrlen;
|
|
int a_socklen;
|
|
int a_off;
|
|
} gni_afdl [] = {
|
|
#if SU_HAVE_IN6
|
|
{PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),
|
|
offsetof(struct sockaddr_in6, sin6_addr)},
|
|
#endif
|
|
{PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),
|
|
offsetof(struct sockaddr_in, sin_addr)},
|
|
{0, 0, 0},
|
|
};
|
|
|
|
struct gni_sockinet {
|
|
u_char si_len;
|
|
u_char si_family;
|
|
u_short si_port;
|
|
};
|
|
|
|
#define ENI_NOSOCKET EAI_FAIL
|
|
#define ENI_NOSERVNAME EAI_NONAME
|
|
#define ENI_NOHOSTNAME EAI_NONAME
|
|
#define ENI_MEMORY EAI_MEMORY
|
|
#define ENI_SYSTEM EAI_SYSTEM
|
|
#define ENI_FAMILY EAI_FAMILY
|
|
#define ENI_SALEN EAI_MEMORY
|
|
|
|
static
|
|
int
|
|
getnameinfo(sa, salen, host, hostlen, serv, servlen, flags)
|
|
const struct sockaddr *sa;
|
|
size_t salen;
|
|
char *host;
|
|
size_t hostlen;
|
|
char *serv;
|
|
size_t servlen;
|
|
int flags;
|
|
{
|
|
struct gni_afd *gni_afd;
|
|
struct servent *sp;
|
|
struct hostent *hp;
|
|
u_short port;
|
|
int family, len, i;
|
|
char *addr, *p;
|
|
u_long v4a;
|
|
u_char pfx;
|
|
int h_error;
|
|
char numserv[512];
|
|
char numaddr[512];
|
|
|
|
if (sa == NULL)
|
|
return ENI_NOSOCKET;
|
|
|
|
#if SU_HAVE_SOCKADDR_SA_LEN
|
|
len = sa->sa_len;
|
|
if (len != salen) return ENI_SALEN;
|
|
#else
|
|
len = salen;
|
|
#endif
|
|
|
|
family = sa->sa_family;
|
|
for (i = 0; gni_afdl[i].a_af; i++)
|
|
if (gni_afdl[i].a_af == family) {
|
|
gni_afd = &gni_afdl[i];
|
|
goto found;
|
|
}
|
|
return ENI_FAMILY;
|
|
|
|
found:
|
|
if (len != gni_afd->a_socklen) return ENI_SALEN;
|
|
|
|
port = ((struct gni_sockinet *)sa)->si_port; /* network byte order */
|
|
addr = (char *)sa + gni_afd->a_off;
|
|
|
|
if (serv == NULL || servlen == 0) {
|
|
/* what we should do? */
|
|
} else if (flags & NI_NUMERICSERV) {
|
|
snprintf(numserv, sizeof(numserv), "%d", ntohs(port));
|
|
if (strlen(numserv) > servlen)
|
|
return ENI_MEMORY;
|
|
strcpy(serv, numserv);
|
|
} else {
|
|
sp = getservbyport(port, (flags & NI_DGRAM) ? "udp" : "tcp");
|
|
if (sp) {
|
|
if (strlen(sp->s_name) > servlen)
|
|
return ENI_MEMORY;
|
|
strcpy(serv, sp->s_name);
|
|
} else
|
|
return ENI_NOSERVNAME;
|
|
}
|
|
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
v4a = ((struct sockaddr_in *)sa)->sin_addr.s_addr;
|
|
if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
|
|
flags |= NI_NUMERICHOST;
|
|
v4a >>= IN_CLASSA_NSHIFT;
|
|
if (v4a == 0 || v4a == IN_LOOPBACKNET)
|
|
flags |= NI_NUMERICHOST;
|
|
break;
|
|
#if SU_HAVE_IN6
|
|
case AF_INET6:
|
|
pfx = ((struct sockaddr_in6 *)sa)->sin6_addr.s6_addr8[0];
|
|
if (pfx == 0 || pfx == 0xfe || pfx == 0xff)
|
|
flags |= NI_NUMERICHOST;
|
|
break;
|
|
#endif
|
|
}
|
|
if (host == NULL || hostlen == 0) {
|
|
/* what should we do? */
|
|
} else if (flags & NI_NUMERICHOST) {
|
|
if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr))
|
|
== NULL)
|
|
return ENI_SYSTEM;
|
|
if (strlen(numaddr) > hostlen)
|
|
return ENI_MEMORY;
|
|
strcpy(host, numaddr);
|
|
} else {
|
|
#if SU_HAVE_IN6
|
|
hp = getipnodebyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af, &h_error);
|
|
#else
|
|
hp = gethostbyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af);
|
|
h_error = h_errno;
|
|
#endif
|
|
|
|
if (hp) {
|
|
if (flags & NI_NOFQDN) {
|
|
p = strchr(hp->h_name, '.');
|
|
if (p) *p = '\0';
|
|
}
|
|
if (strlen(hp->h_name) > hostlen) {
|
|
#if SU_HAVE_IN6
|
|
freehostent(hp);
|
|
#endif
|
|
return ENI_MEMORY;
|
|
}
|
|
strcpy(host, hp->h_name);
|
|
#if SU_HAVE_IN6
|
|
freehostent(hp);
|
|
#endif
|
|
} else {
|
|
if (flags & NI_NAMEREQD)
|
|
return ENI_NOHOSTNAME;
|
|
if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr))
|
|
== NULL)
|
|
return ENI_NOHOSTNAME;
|
|
if (strlen(numaddr) > hostlen)
|
|
return ENI_MEMORY;
|
|
strcpy(host, numaddr);
|
|
}
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
#endif /* !HAVE_GETNAMEINFO */
|
|
|
|
#if !HAVE_FREEADDRINFO
|
|
static
|
|
void
|
|
freeaddrinfo(ai)
|
|
struct addrinfo *ai;
|
|
{
|
|
struct addrinfo *next;
|
|
|
|
do {
|
|
next = ai->ai_next;
|
|
if (ai->ai_canonname)
|
|
free(ai->ai_canonname);
|
|
/* no need to free(ai->ai_addr) */
|
|
free(ai);
|
|
} while ((ai = next) != NULL);
|
|
}
|
|
#endif
|
|
|
|
#if !HAVE_GAI_STRERROR
|
|
static
|
|
char *
|
|
gai_strerror(ecode)
|
|
int ecode;
|
|
{
|
|
switch (ecode) {
|
|
case 0:
|
|
return "success.";
|
|
#if defined(EAI_ADDRFAMILY)
|
|
case EAI_ADDRFAMILY:
|
|
return "address family for hostname not supported.";
|
|
#endif
|
|
#if defined(EAI_AGAIN)
|
|
case EAI_AGAIN:
|
|
return "temporary failure in name resolution.";
|
|
#endif
|
|
#if defined(EAI_BADFLAGS)
|
|
case EAI_BADFLAGS:
|
|
return "invalid value for ai_flags.";
|
|
#endif
|
|
#if defined(EAI_FAIL)
|
|
case EAI_FAIL:
|
|
return "non-recoverable failure in name resolution.";
|
|
#endif
|
|
#if defined(EAI_FAMILY)
|
|
case EAI_FAMILY:
|
|
return "ai_family not supported.";
|
|
#endif
|
|
#if defined(EAI_MEMORY)
|
|
case EAI_MEMORY:
|
|
return "memory allocation failure.";
|
|
#endif
|
|
#if defined(EAI_NODATA)
|
|
case EAI_NODATA:
|
|
return "no address associated with hostname.";
|
|
#endif
|
|
#if defined(EAI_NONAME)
|
|
case EAI_NONAME:
|
|
return "hostname nor servname provided, or not known.";
|
|
#endif
|
|
#if defined(EAI_SERVICE)
|
|
case EAI_SERVICE:
|
|
return "servname not supported for ai_socktype.";
|
|
#endif
|
|
#if defined(EAI_SOCKTYPE)
|
|
case EAI_SOCKTYPE:
|
|
return "ai_socktype not supported.";
|
|
#endif
|
|
#if defined(EAI_SYSTEM)
|
|
case EAI_SYSTEM:
|
|
return "system error returned in errno.";
|
|
#endif
|
|
#if defined(EAI_BADHINTS)
|
|
case EAI_BADHINTS:
|
|
return "invalid value for hints.";
|
|
#endif
|
|
#if defined(EAI_PROTOCOL)
|
|
case EAI_PROTOCOL:
|
|
return "resolved protocol is unknown.";
|
|
#endif
|
|
default:
|
|
return "unknown error.";
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/** Translate address and service.
|
|
*
|
|
* This is a getaddrinfo() supporting SCTP and other exotic protocols.
|
|
*/
|
|
int su_getaddrinfo(char const *node, char const *service,
|
|
su_addrinfo_t const *hints,
|
|
su_addrinfo_t **res)
|
|
{
|
|
#if HAVE_SCTP
|
|
if (res && hints && hints->ai_protocol == IPPROTO_SCTP) {
|
|
su_addrinfo_t *ai, system_hints[1];
|
|
int retval, socktype;
|
|
|
|
socktype = hints->ai_socktype;
|
|
|
|
if (!(socktype == 0 ||
|
|
socktype == SOCK_SEQPACKET ||
|
|
socktype == SOCK_STREAM ||
|
|
socktype == SOCK_DGRAM))
|
|
return EAI_SOCKTYPE;
|
|
|
|
*system_hints = *hints;
|
|
system_hints->ai_protocol = IPPROTO_TCP;
|
|
system_hints->ai_socktype = SOCK_STREAM;
|
|
|
|
retval = getaddrinfo(node, service, system_hints, res);
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (socktype == 0)
|
|
socktype = SOCK_STREAM;
|
|
|
|
for (ai = *res; ai; ai = ai->ai_next) {
|
|
ai->ai_protocol = IPPROTO_SCTP;
|
|
ai->ai_socktype = socktype;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
return getaddrinfo(node, service, hints, res);
|
|
}
|
|
|
|
/** Free su_addrinfo_t structure allocated by su_getaddrinfo(). */
|
|
void su_freeaddrinfo(su_addrinfo_t *res)
|
|
{
|
|
freeaddrinfo(res);
|
|
}
|
|
|
|
/** Return string describing address translation error. */
|
|
char const *su_gai_strerror(int errcode)
|
|
{
|
|
return (char const *)gai_strerror(errcode);
|
|
}
|
|
|
|
/** Resolve socket address into hostname and service name.
|
|
*
|
|
* @note
|
|
* This function uses now @RFC2133 prototype. The @RFC3493 redefines the
|
|
* prototype as well as ai_addrlen to use socklen_t instead of size_t.
|
|
* If your application allocates more than 2 gigabytes for resolving the
|
|
* hostname, you probably lose.
|
|
*/
|
|
int
|
|
su_getnameinfo(const su_sockaddr_t *su, size_t sulen,
|
|
char *return_host, size_t hostlen,
|
|
char *return_serv, size_t servlen,
|
|
int flags)
|
|
{
|
|
return getnameinfo(&su->su_sa, (socklen_t)sulen,
|
|
return_host, (socklen_t)hostlen,
|
|
return_serv, (socklen_t)servlen,
|
|
flags);
|
|
}
|