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/* Stroke for charon is the counterpart to whack from pluto
* Copyright (C) 2006 Martin Willi - Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* RCSID $Id: starterstroke.c $
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <linux/stddef.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <freeswan.h>
#include <constants.h>
#include <defs.h>
#include <log.h>
#include <stroke.h>
#include "starterstroke.h"
#include "confread.h"
#include "files.h"
static char* push_string(stroke_msg_t *msg, char *string)
{
u_int string_start = msg->length;
if (string == NULL || msg->length + strlen(string) >= sizeof(stroke_msg_t))
{
return NULL;
}
else
{
msg->length += strlen(string) + 1;
strcpy((char*)msg + string_start, string);
return (char*)string_start;
}
}
static int send_stroke_msg (stroke_msg_t *msg)
{
struct sockaddr_un ctl_addr = { AF_UNIX, CHARON_CTL_FILE };
int byte_count;
char buffer[64];
int sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock < 0)
{
plog("socket() failed: %s", strerror(errno));
return -1;
}
if (connect(sock, (struct sockaddr *)&ctl_addr, offsetof(struct sockaddr_un, sun_path) + strlen(ctl_addr.sun_path)) < 0)
{
plog("connect(charon_ctl) failed: %s", strerror(errno));
close(sock);
return -1;
}
/* send message */
if (write(sock, msg, msg->length) != msg->length)
{
plog("write(charon_ctl) failed: %s", strerror(errno));
close(sock);
return -1;
}
while ((byte_count = read(sock, buffer, sizeof(buffer)-1)) > 0)
{
buffer[byte_count] = '\0';
plog("%s", buffer);
}
if (byte_count < 0)
{
plog("read() failed: %s", strerror(errno));
}
close(sock);
return 0;
}
static char* connection_name(starter_conn_t *conn)
{
/* if connection name is '%auto', create a new name like conn_xxxxx */
static char buf[32];
if (streq(conn->name, "%auto"))
{
sprintf(buf, "conn_%ld", conn->id);
return buf;
}
return conn->name;
}
static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, starter_end_t *conn_end)
{
msg_end->id = push_string(msg, conn_end->id);
msg_end->cert = push_string(msg, conn_end->cert);
msg_end->ca = push_string(msg, conn_end->ca);
msg_end->address = push_string(msg, inet_ntoa(conn_end->addr.u.v4.sin_addr));
msg_end->subnet = push_string(msg, inet_ntoa(conn_end->subnet.addr.u.v4.sin_addr));
msg_end->subnet_mask = conn_end->subnet.maskbits;
msg_end->sendcert = conn_end->sendcert;
}
int starter_stroke_add_conn(starter_conn_t *conn)
{
stroke_msg_t msg;
msg.type = STR_ADD_CONN;
msg.length = offsetof(stroke_msg_t, buffer);
msg.add_conn.ikev2 = conn->keyexchange == KEY_EXCHANGE_IKEV2;
msg.add_conn.name = push_string(&msg, connection_name(conn));
msg.add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
msg.add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
msg.add_conn.rekey.margin = conn->sa_rekey_margin;
msg.add_conn.rekey.tries = conn->sa_keying_tries;
msg.add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
starter_stroke_add_end(&msg, &msg.add_conn.me, &conn->right);
starter_stroke_add_end(&msg, &msg.add_conn.other, &conn->left);
return send_stroke_msg(&msg);
}
int starter_stroke_del_conn(starter_conn_t *conn)
{
stroke_msg_t msg;
msg.type = STR_DEL_CONN;
msg.length = offsetof(stroke_msg_t, buffer);
msg.install.name = push_string(&msg, connection_name(conn));
return send_stroke_msg(&msg);
}
int starter_stroke_route_conn(starter_conn_t *conn)
{
stroke_msg_t msg;
msg.type = STR_INSTALL;
msg.length = offsetof(stroke_msg_t, buffer);
msg.install.name = push_string(&msg, connection_name(conn));
return send_stroke_msg(&msg);
}
int starter_stroke_initiate_conn(starter_conn_t *conn)
{
stroke_msg_t msg;
msg.type = STR_INITIATE;
msg.length = offsetof(stroke_msg_t, buffer);
msg.initiate.name = push_string(&msg, connection_name(conn));
return send_stroke_msg(&msg);
}
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