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/*
* Copyright 1997-2000 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Parts derived from code by Angelos D. Keromytis, kermit@forthnet.gr
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This is an experimental implementation of the Photuris Session Key Management
* Protocol, as of draft-ietf-ipsec-photuris-06.txt.
*
* The usual disclaimers/non-guarantees etc. etc. apply.
*/
#ifndef lint
static char rcsid[] = "$Id: api.c,v 1.4 2000/12/15 02:50:37 provos Exp $";
#endif
#define _API_C_
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "state.h"
#include "photuris.h"
#include "config.h"
#include "api.h"
#include "log.h"
#include "buffer.h"
#include "schedule.h"
#include "server.h"
#include "packet.h"
/*
* process_api:
* process requests from user processes or kernel notify
*/
void
process_api(int fd, int sendsock)
{
struct stateob *st;
int sz, i;
#ifdef DEBUG
printf("Entering API.\n");
#endif
bzero(buffer, BUFFER_SIZE);
if ((sz = read(fd, buffer, BUFFER_SIZE)) == -1)
log_fatal("read() in process_api()");
buffer[sz >= BUFFER_SIZE ? BUFFER_SIZE -1 : sz] = 0;
if (!sz)
return;
/* Set up a new state object */
if ((st = state_new()) == NULL) {
log_error("state_new() in process_api()");
return;
}
startup_parse(st, buffer);
#ifndef DEBUG
if (addresses != (char **) NULL && strlen(st->address))
for (i = 0; i < num_ifs; i++) {
if (addresses[i] == (char *)NULL)
continue;
if (!strcmp(addresses[i], st->address)) {
/* XXX Code to notify kernel of failure here */
log_print("discarded request to initiate KES with localhost");
state_value_reset(st);
free(st);
return;
}
}
#endif
startup_end(st);
#ifdef DEBUG
printf("API finished.\n");
#endif
}
int
start_exchange(int sd, struct stateob *st, char *address, int port)
{
struct sockaddr_in sin;
/* Now fill it in */
strncpy(st->address, address, 15);
st->address[15] = '\0';
st->port = port;
st->initiator = 1;
/* Determine sender address before we invalidate buffer */
sin.sin_addr.s_addr = inet_addr(st->address);
sin.sin_port = htons(st->port);
sin.sin_family = AF_INET;
packet_size = PACKET_BUFFER_SIZE;
if (photuris_cookie_request(st, packet_buffer, &packet_size) == -1) {
log_print("photuris_cookie_request() in start_exchange() "
"for %s:%d", st->address, st->port);
return -1;
}
/* Save the packets for later retransmits */
packet_save(st, packet_buffer, packet_size);
if (sendto(sd, packet_buffer, packet_size, 0,
(struct sockaddr *) &sin, sizeof(sin)) != packet_size) {
/* XXX Code to notify kernel of failure */
log_error("sendto() in start_exchange() for %s:%d",
st->address, st->port);
return -1;
}
schedule_insert(TIMEOUT, retrans_timeout, st->icookie, COOKIE_SIZE);
return 0;
}
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