354 lines
9.7 KiB
C
354 lines
9.7 KiB
C
/* Stroke for charon is the counterpart to whack from pluto
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* Copyright (C) 2006 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <credentials/auth_cfg.h>
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#include <freeswan.h>
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#include <constants.h>
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#include <defs.h>
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#include <log.h>
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#include <stroke_msg.h>
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#include "starterstroke.h"
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#include "confread.h"
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#include "files.h"
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#define IPV4_LEN 4
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#define IPV6_LEN 16
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static char* push_string(stroke_msg_t *msg, char *string)
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{
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unsigned long string_start = msg->length;
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if (string == NULL || msg->length + strlen(string) >= sizeof(stroke_msg_t))
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{
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return NULL;
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}
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else
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{
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msg->length += strlen(string) + 1;
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strcpy((char*)msg + string_start, string);
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return (char*)string_start;
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}
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}
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static int send_stroke_msg (stroke_msg_t *msg)
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{
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struct sockaddr_un ctl_addr;
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int byte_count;
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char buffer[64];
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ctl_addr.sun_family = AF_UNIX;
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strcpy(ctl_addr.sun_path, CHARON_CTL_FILE);
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/* starter is not called from commandline, and therefore absolutely silent */
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msg->output_verbosity = -1;
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int sock = socket(AF_UNIX, SOCK_STREAM, 0);
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if (sock < 0)
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{
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plog("socket() failed: %s", strerror(errno));
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return -1;
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}
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if (connect(sock, (struct sockaddr *)&ctl_addr, offsetof(struct sockaddr_un, sun_path) + strlen(ctl_addr.sun_path)) < 0)
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{
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plog("connect(charon_ctl) failed: %s", strerror(errno));
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close(sock);
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return -1;
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}
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/* send message */
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if (write(sock, msg, msg->length) != msg->length)
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{
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plog("write(charon_ctl) failed: %s", strerror(errno));
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close(sock);
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return -1;
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}
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while ((byte_count = read(sock, buffer, sizeof(buffer)-1)) > 0)
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{
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buffer[byte_count] = '\0';
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plog("%s", buffer);
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}
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if (byte_count < 0)
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{
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plog("read() failed: %s", strerror(errno));
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}
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close(sock);
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return 0;
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}
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static char* connection_name(starter_conn_t *conn)
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{
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/* if connection name is '%auto', create a new name like conn_xxxxx */
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static char buf[32];
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if (streq(conn->name, "%auto"))
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{
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sprintf(buf, "conn_%lu", conn->id);
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return buf;
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}
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return conn->name;
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}
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static void ip_address2string(ip_address *addr, char *buffer, size_t len)
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{
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switch (((struct sockaddr*)addr)->sa_family)
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{
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case AF_INET6:
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{
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struct sockaddr_in6* sin6 = (struct sockaddr_in6*)addr;
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u_int8_t zeroes[IPV6_LEN];
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memset(zeroes, 0, IPV6_LEN);
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if (memcmp(zeroes, &(sin6->sin6_addr.s6_addr), IPV6_LEN) &&
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inet_ntop(AF_INET6, &sin6->sin6_addr, buffer, len))
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{
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return;
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}
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snprintf(buffer, len, "%%any6");
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break;
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}
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case AF_INET:
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{
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struct sockaddr_in* sin = (struct sockaddr_in*)addr;
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u_int8_t zeroes[IPV4_LEN];
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memset(zeroes, 0, IPV4_LEN);
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if (memcmp(zeroes, &(sin->sin_addr.s_addr), IPV4_LEN) &&
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inet_ntop(AF_INET, &sin->sin_addr, buffer, len))
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{
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return;
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}
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/* fall through to default */
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}
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default:
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snprintf(buffer, len, "%%any");
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break;
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}
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}
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static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, starter_end_t *conn_end)
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{
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char buffer[INET6_ADDRSTRLEN];
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msg_end->auth = push_string(msg, conn_end->auth);
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msg_end->auth2 = push_string(msg, conn_end->auth2);
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msg_end->id = push_string(msg, conn_end->id);
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msg_end->id2 = push_string(msg, conn_end->id2);
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msg_end->cert = push_string(msg, conn_end->cert);
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msg_end->cert2 = push_string(msg, conn_end->cert2);
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msg_end->cert_policy = push_string(msg, conn_end->cert_policy);
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msg_end->ca = push_string(msg, conn_end->ca);
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msg_end->ca2 = push_string(msg, conn_end->ca2);
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msg_end->groups = push_string(msg, conn_end->groups);
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msg_end->updown = push_string(msg, conn_end->updown);
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ip_address2string(&conn_end->addr, buffer, sizeof(buffer));
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msg_end->address = push_string(msg, buffer);
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msg_end->ikeport = conn_end->ikeport;
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msg_end->subnets = push_string(msg, conn_end->subnet);
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msg_end->sourceip = push_string(msg, conn_end->sourceip);
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msg_end->sourceip_mask = conn_end->sourceip_mask;
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msg_end->sendcert = conn_end->sendcert;
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msg_end->hostaccess = conn_end->hostaccess;
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msg_end->tohost = !conn_end->has_client;
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msg_end->protocol = conn_end->protocol;
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msg_end->port = conn_end->port;
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}
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int starter_stroke_add_conn(starter_config_t *cfg, starter_conn_t *conn)
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{
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stroke_msg_t msg;
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memset(&msg, 0, sizeof(msg));
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msg.type = STR_ADD_CONN;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.add_conn.ikev2 = conn->keyexchange != KEY_EXCHANGE_IKEV1;
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msg.add_conn.name = push_string(&msg, connection_name(conn));
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/* PUBKEY is preferred to PSK and EAP */
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if (conn->policy & POLICY_PUBKEY)
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{
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msg.add_conn.auth_method = AUTH_CLASS_PUBKEY;
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}
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else if (conn->policy & POLICY_PSK)
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{
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msg.add_conn.auth_method = AUTH_CLASS_PSK;
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}
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else if (conn->policy & POLICY_XAUTH_PSK)
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{
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msg.add_conn.auth_method = AUTH_CLASS_EAP;
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}
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else
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{
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msg.add_conn.auth_method = AUTH_CLASS_ANY;
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}
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msg.add_conn.eap_type = conn->eap_type;
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msg.add_conn.eap_vendor = conn->eap_vendor;
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msg.add_conn.eap_identity = push_string(&msg, conn->eap_identity);
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msg.add_conn.aaa_identity = push_string(&msg, conn->aaa_identity);
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if (conn->policy & POLICY_TUNNEL)
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{
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msg.add_conn.mode = MODE_TUNNEL;
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}
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else if (conn->policy & POLICY_BEET)
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{
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msg.add_conn.mode = MODE_BEET;
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}
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else if (conn->policy & POLICY_PROXY)
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{
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msg.add_conn.mode = MODE_TRANSPORT;
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msg.add_conn.proxy_mode = TRUE;
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}
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else if (conn->policy & POLICY_SHUNT_PASS)
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{
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msg.add_conn.mode = MODE_PASS;
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}
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else if (conn->policy & (POLICY_SHUNT_DROP | POLICY_SHUNT_REJECT))
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{
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msg.add_conn.mode = MODE_DROP;
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}
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else
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{
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msg.add_conn.mode = MODE_TRANSPORT;
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}
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if (!(conn->policy & POLICY_DONT_REKEY))
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{
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msg.add_conn.rekey.reauth = (conn->policy & POLICY_DONT_REAUTH) == LEMPTY;
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msg.add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
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msg.add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
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msg.add_conn.rekey.margin = conn->sa_rekey_margin;
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msg.add_conn.rekey.life_bytes = conn->sa_ipsec_life_bytes;
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msg.add_conn.rekey.margin_bytes = conn->sa_ipsec_margin_bytes;
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msg.add_conn.rekey.life_packets = conn->sa_ipsec_life_packets;
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msg.add_conn.rekey.margin_packets = conn->sa_ipsec_margin_packets;
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msg.add_conn.rekey.tries = conn->sa_keying_tries;
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msg.add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
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}
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msg.add_conn.mobike = (conn->policy & POLICY_MOBIKE) != 0;
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msg.add_conn.force_encap = (conn->policy & POLICY_FORCE_ENCAP) != 0;
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msg.add_conn.ipcomp = (conn->policy & POLICY_COMPRESS) != 0;
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msg.add_conn.install_policy = conn->install_policy;
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msg.add_conn.crl_policy = cfg->setup.strictcrlpolicy;
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msg.add_conn.unique = cfg->setup.uniqueids;
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msg.add_conn.algorithms.ike = push_string(&msg, conn->ike);
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msg.add_conn.algorithms.esp = push_string(&msg, conn->esp);
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msg.add_conn.dpd.delay = conn->dpd_delay;
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msg.add_conn.dpd.action = conn->dpd_action;
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msg.add_conn.close_action = conn->close_action;
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msg.add_conn.inactivity = conn->inactivity;
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msg.add_conn.ikeme.mediation = conn->me_mediation;
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msg.add_conn.ikeme.mediated_by = push_string(&msg, conn->me_mediated_by);
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msg.add_conn.ikeme.peerid = push_string(&msg, conn->me_peerid);
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msg.add_conn.reqid = conn->reqid;
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msg.add_conn.mark_in.value = conn->mark_in.value;
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msg.add_conn.mark_in.mask = conn->mark_in.mask;
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msg.add_conn.mark_out.value = conn->mark_out.value;
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msg.add_conn.mark_out.mask = conn->mark_out.mask;
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msg.add_conn.tfc = conn->tfc;
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starter_stroke_add_end(&msg, &msg.add_conn.me, &conn->left);
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starter_stroke_add_end(&msg, &msg.add_conn.other, &conn->right);
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return send_stroke_msg(&msg);
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}
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int starter_stroke_del_conn(starter_conn_t *conn)
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{
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stroke_msg_t msg;
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msg.type = STR_DEL_CONN;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.del_conn.name = push_string(&msg, connection_name(conn));
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return send_stroke_msg(&msg);
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}
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int starter_stroke_route_conn(starter_conn_t *conn)
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{
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stroke_msg_t msg;
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msg.type = STR_ROUTE;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.route.name = push_string(&msg, connection_name(conn));
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return send_stroke_msg(&msg);
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}
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int starter_stroke_initiate_conn(starter_conn_t *conn)
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{
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stroke_msg_t msg;
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msg.type = STR_INITIATE;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.initiate.name = push_string(&msg, connection_name(conn));
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return send_stroke_msg(&msg);
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}
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int starter_stroke_add_ca(starter_ca_t *ca)
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{
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stroke_msg_t msg;
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msg.type = STR_ADD_CA;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.add_ca.name = push_string(&msg, ca->name);
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msg.add_ca.cacert = push_string(&msg, ca->cacert);
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msg.add_ca.crluri = push_string(&msg, ca->crluri);
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msg.add_ca.crluri2 = push_string(&msg, ca->crluri2);
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msg.add_ca.ocspuri = push_string(&msg, ca->ocspuri);
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msg.add_ca.ocspuri2 = push_string(&msg, ca->ocspuri2);
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msg.add_ca.certuribase = push_string(&msg, ca->certuribase);
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return send_stroke_msg(&msg);
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}
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int starter_stroke_del_ca(starter_ca_t *ca)
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{
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stroke_msg_t msg;
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msg.type = STR_DEL_CA;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.del_ca.name = push_string(&msg, ca->name);
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return send_stroke_msg(&msg);
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}
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int starter_stroke_configure(starter_config_t *cfg)
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{
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stroke_msg_t msg;
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if (cfg->setup.cachecrls)
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{
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msg.type = STR_CONFIG;
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msg.length = offsetof(stroke_msg_t, buffer);
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msg.config.cachecrl = 1;
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return send_stroke_msg(&msg);
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}
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return 0;
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}
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