952 lines
22 KiB
C
952 lines
22 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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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 Institute 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 INSTITUTE 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 INSTITUTE 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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* This file is part of the Contiki operating system.
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*
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* Author: Oliver Schmidt <ol.sc@web.de>
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*
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef __CYGWIN__
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#include <alloca.h>
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#else /* __CYGWIN__ */
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#include <malloc.h>
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#endif /* __CYGWIN__ */
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <err.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#define PROGRESS(x)
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void wpcap_start(char *ethifaddr, char *netaddr, char *netmask, int logging);
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void wpcap_send(void *buf, int len);
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uint16_t wpcap_poll(char **buf);
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#include "net/tcpdump.h"
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static int should_print = 0;
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#define IP_HLEN 20
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/*---------------------------------------------------------------------------*/
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static void
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print_packet(uint8_t *packet, int len)
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{
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char buf[2000];
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if(should_print) {
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tcpdump_format(packet, len, buf, sizeof(buf));
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printf("%s\n", buf);
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}
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}
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/*---------------------------------------------------------------------------*/
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void cleanup(void);
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/*---------------------------------------------------------------------------*/
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void
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sigcleanup(int signo)
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{
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fprintf(stderr, "signal %d\n", signo);
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exit(0); /* exit(0) will call cleanup() */
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}
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/*---------------------------------------------------------------------------*/
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#define SLIP_END 0300
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#define SLIP_ESC 0333
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#define SLIP_ESC_END 0334
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#define SLIP_ESC_ESC 0335
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struct ip {
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u_int8_t ip_vhl; /* version and header length */
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#define IP_V4 0x40
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#define IP_V 0xf0
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#define IP_HL 0x0f
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u_int8_t ip_tos; /* type of service */
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u_int16_t ip_len; /* total length */
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u_int16_t ip_id; /* identification */
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u_int16_t ip_off; /* fragment offset field */
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#define IP_RF 0x8000 /* reserved fragment flag */
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#define IP_DF 0x4000 /* dont fragment flag */
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#define IP_MF 0x2000 /* more fragments flag */
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#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
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u_int8_t ip_ttl; /* time to live */
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u_int8_t ip_p; /* protocol */
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u_int16_t ip_sum; /* checksum */
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u_int32_t ip_src, ip_dst; /* source and dest address */
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u_int16_t uh_sport; /* source port */
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u_int16_t uh_dport; /* destination port */
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u_int16_t uh_ulen; /* udp length */
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u_int16_t uh_sum; /* udp checksum */
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};
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static int ip_id, last_id;
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int
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ssystem(const char *fmt, ...) __attribute__((__format__ (__printf__, 1, 2)));
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int
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ssystem(const char *fmt, ...)
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{
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char cmd[128];
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(cmd, sizeof(cmd), fmt, ap);
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va_end(ap);
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printf("%s\n", cmd);
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fflush(stdout);
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return system(cmd);
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}
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int
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is_sensible_string(const unsigned char *s, int len)
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{
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int i;
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for(i = 1; i < len; i++) {
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if(s[i] == 0 || s[i] == '\r' || s[i] == '\n' || s[i] == '\t') {
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continue;
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} else if(s[i] < ' ' || '~' < s[i]) {
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return 0;
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}
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}
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return 1;
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}
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u_int16_t
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ip4sum(u_int16_t sum, const void *_p, u_int16_t len)
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{
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u_int16_t t;
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const u_int8_t *p = _p;
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const u_int8_t *end = p + len;
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while(p < (end-1)) {
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t = (p[0] << 8) + p[1];
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sum += t;
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if (sum < t) sum++;
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p += 2;
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}
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if(p < end) {
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t = (p[0] << 8) + 0;
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sum += t;
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if (sum < t) sum++;
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}
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return sum;
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}
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static uint16_t
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chksum(const void *p, uint16_t len)
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{
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uint16_t sum = ip4sum(0, p, len);
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return (sum == 0) ? 0xffff : uip_htons(sum);
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}
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int
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check_ip(const struct ip *ip, unsigned ip_len)
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{
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u_int16_t sum, ip_hl;
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/* Check IP version and length. */
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if((ip->ip_vhl & IP_V) != IP_V4) {
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return -1;
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}
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if(uip_ntohs(ip->ip_len) > ip_len) {
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return -2;
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}
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if(uip_ntohs(ip->ip_len) < ip_len) {
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return -3;
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}
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/* Check IP header. */
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ip_hl = 4*(ip->ip_vhl & IP_HL);
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sum = ip4sum(0, ip, ip_hl);
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if(sum != 0xffff && sum != 0x0) {
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return -4;
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}
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if(ip->ip_p == 6 || ip->ip_p == 17) { /* Check TCP or UDP header. */
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u_int16_t tcp_len = ip_len - ip_hl;
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/* Sum pseudoheader. */
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sum = ip->ip_p + tcp_len; /* proto and len, no carry */
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sum = ip4sum(sum, &ip->ip_src, 8); /* src and dst */
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/* Sum TCP/UDP header and data. */
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sum = ip4sum(sum, (u_int8_t*)ip + ip_hl, tcp_len);
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/* Failed checksum test? */
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if(sum != 0xffff && sum != 0x0) {
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if(ip->ip_p == 6) { /* TCP == 6 */
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return -5;
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} else { /* UDP */
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/* Deal with disabled UDP checksums. */
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if(ip->uh_sum != 0) {
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return -6;
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}
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}
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}
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} else if (ip->ip_p == 1) { /* ICMP */
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u_int16_t icmp_len = ip_len - ip_hl;
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sum = ip4sum(0, (u_int8_t*)ip + ip_hl, icmp_len);
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if(sum != 0xffff && sum != 0x0) {
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return -7;
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}
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}
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return 0;
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}
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/*
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* Read from serial, when we have a packet write it to tun. No output
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* buffering, input buffered by stdio.
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*/
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void
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serial_to_wpcap(FILE *inslip)
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{
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static union {
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unsigned char inbuf[2000];
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struct ip iphdr;
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} uip;
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static int inbufptr = 0;
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int ret;
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unsigned char c;
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#ifdef linux
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ret = fread(&c, 1, 1, inslip);
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if(ret == -1 || ret == 0) err(1, "serial_to_tun: read");
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goto after_fread;
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#endif
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read_more:
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if(inbufptr >= sizeof(uip.inbuf)) {
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inbufptr = 0;
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}
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ret = fread(&c, 1, 1, inslip);
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#ifdef linux
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after_fread:
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#endif
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if(ret == -1) {
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err(1, "serial_to_tun: read");
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}
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if(ret == 0) {
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clearerr(inslip);
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return;
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fprintf(stderr, "serial_to_tun: EOF\n");
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exit(1);
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}
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/* fprintf(stderr, ".");*/
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switch(c) {
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case SLIP_END:
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if(inbufptr > 0) {
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/*
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* Sanity checks.
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*/
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#define DEBUG_LINE_MARKER '\r'
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int ecode;
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ecode = check_ip(&uip.iphdr, inbufptr);
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if(ecode < 0 && inbufptr == 8 && strncmp(uip.inbuf, "=IPA", 4) == 0) {
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static struct in_addr ipa;
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inbufptr = 0;
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if(memcmp(&ipa, &uip.inbuf[4], sizeof(ipa)) == 0) {
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break;
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}
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/* New address. */
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if(ipa.s_addr != 0) {
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#if 0
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#ifdef linux
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ssystem("route delete -net %s netmask %s dev %s",
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inet_ntoa(ipa), "255.255.255.255", tundev);
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#else
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ssystem("route delete -net %s -netmask %s -interface %s",
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inet_ntoa(ipa), "255.255.255.255", tundev);
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#endif
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#endif /* 0 */
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}
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memcpy(&ipa, &uip.inbuf[4], sizeof(ipa));
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if(ipa.s_addr != 0) {
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#if 0
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#ifdef linux
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ssystem("route add -net %s netmask %s dev %s",
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inet_ntoa(ipa), "255.255.255.255", tundev);
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#else
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ssystem("route add -net %s -netmask %s -interface %s",
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inet_ntoa(ipa), "255.255.255.255", tundev);
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#endif
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#endif /* 0 */
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}
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break;
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} else if(ecode < 0) {
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/*
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* If sensible ASCII string, print it as debug info!
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*/
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/* printf("----------------------------------\n");*/
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if(uip.inbuf[0] == DEBUG_LINE_MARKER) {
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fwrite(uip.inbuf + 1, inbufptr - 1, 1, stderr);
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} else if(is_sensible_string(uip.inbuf, inbufptr)) {
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fwrite(uip.inbuf, inbufptr, 1, stderr);
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} else {
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fprintf(stderr,
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"serial_to_tun: drop packet len=%d ecode=%d\n",
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inbufptr, ecode);
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}
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inbufptr = 0;
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break;
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}
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PROGRESS("s");
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#if 0
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if(dhsock != -1) {
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struct ip *ip = (void *)uip.inbuf;
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if(ip->ip_p == 17 && ip->ip_dst == 0xffffffff /* UDP and broadcast */
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&& ip->uh_sport == uip_ntohs(BOOTPC) && ip->uh_dport == uip_ntohs(BOOTPS)) {
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relay_dhcp_to_server(ip, inbufptr);
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inbufptr = 0;
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}
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}
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#endif /* 0 */
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/* if(write(outfd, uip.inbuf, inbufptr) != inbufptr) {
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err(1, "serial_to_tun: write");
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}*/
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/* printf("Sending to wpcap\n");*/
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print_packet(uip.inbuf, inbufptr);
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wpcap_send(uip.inbuf, inbufptr);
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/* printf("After sending to wpcap\n");*/
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inbufptr = 0;
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}
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break;
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case SLIP_ESC:
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if(fread(&c, 1, 1, inslip) != 1) {
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clearerr(inslip);
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/* Put ESC back and give up! */
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ungetc(SLIP_ESC, inslip);
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return;
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}
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switch(c) {
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case SLIP_ESC_END:
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c = SLIP_END;
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break;
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case SLIP_ESC_ESC:
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c = SLIP_ESC;
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break;
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}
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/* FALLTHROUGH */
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default:
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uip.inbuf[inbufptr++] = c;
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break;
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}
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goto read_more;
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}
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/*---------------------------------------------------------------------------*/
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unsigned char slip_buf[2000];
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int slip_end, slip_begin;
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/*---------------------------------------------------------------------------*/
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void
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slip_send(int fd, unsigned char c)
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{
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if(slip_end >= sizeof(slip_buf)) {
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err(1, "slip_send overflow");
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}
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slip_buf[slip_end] = c;
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slip_end++;
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}
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/*---------------------------------------------------------------------------*/
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int
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slip_empty()
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{
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return slip_end == 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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slip_flushbuf(int fd)
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{
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int n;
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if (slip_empty())
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return;
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n = write(fd, slip_buf + slip_begin, (slip_end - slip_begin));
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if(n == -1 && errno != EAGAIN) {
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err(1, "slip_flushbuf write failed");
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} else if(n == -1) {
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PROGRESS("Q"); /* Outqueueis full! */
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} else {
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slip_begin += n;
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if(slip_begin == slip_end) {
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slip_begin = slip_end = 0;
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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write_to_serial(int outfd, void *inbuf, int len)
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{
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u_int8_t *p = inbuf;
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int i, ecode;
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struct ip *iphdr = inbuf;
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/*
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* Sanity checks.
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*/
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ecode = check_ip(inbuf, len);
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if(ecode < 0) {
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fprintf(stderr, "write_to_serial: drop packet %d\n", ecode);
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return;
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}
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if(iphdr->ip_id == 0 && iphdr->ip_off & IP_DF) {
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uint16_t nid = uip_htons(ip_id++);
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iphdr->ip_id = nid;
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nid = ~nid; /* negate */
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iphdr->ip_sum += nid; /* add */
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if(iphdr->ip_sum < nid) { /* 1-complement overflow? */
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iphdr->ip_sum++;
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}
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ecode = check_ip(inbuf, len);
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if(ecode < 0) {
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fprintf(stderr, "write_to_serial: drop packet %d\n", ecode);
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return;
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}
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}
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iphdr->ip_ttl = uip_htons(uip_htons(iphdr->ip_ttl) + 1);
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if(iphdr->ip_ttl == 0) {
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fprintf(stderr, "Packet with ttl %d dropped\n", iphdr->ip_ttl);
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return;
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}
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iphdr->ip_sum = 0;
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iphdr->ip_sum = ~chksum(iphdr, 4 * (iphdr->ip_vhl & IP_HL));
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ecode = check_ip(inbuf, len);
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if(ecode < 0) {
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fprintf(stderr, "write_to_serial: drop packet %d\n", ecode);
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return;
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}
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/* It would be ``nice'' to send a SLIP_END here but it's not
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* really necessary.
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*/
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/* slip_send(outfd, SLIP_END); */
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for(i = 0; i < len; i++) {
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switch(p[i]) {
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case SLIP_END:
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slip_send(outfd, SLIP_ESC);
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slip_send(outfd, SLIP_ESC_END);
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break;
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case SLIP_ESC:
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slip_send(outfd, SLIP_ESC);
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slip_send(outfd, SLIP_ESC_ESC);
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break;
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default:
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slip_send(outfd, p[i]);
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break;
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}
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}
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slip_send(outfd, SLIP_END);
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/* printf("slip end\n");*/
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PROGRESS("t");
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}
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/*---------------------------------------------------------------------------*/
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/*
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* Read from tun, write to slip.
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*/
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#if 0
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void
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tun_to_serial(int infd, int outfd)
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{
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static union {
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unsigned char inbuf[2000];
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struct ip iphdr;
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} uip;
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int size;
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if((size = read(infd, uip.inbuf, 2000)) == -1) {
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err(1, "tun_to_serial: read");
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}
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write_to_serial(outfd, uip.inbuf, size);
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}
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#endif /* 0 */
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/*---------------------------------------------------------------------------*/
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#ifndef BAUDRATE
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#define BAUDRATE B115200
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#endif
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speed_t b_rate = BAUDRATE;
|
|
|
|
void
|
|
cfmakeraw(t)
|
|
struct termios *t;
|
|
{
|
|
|
|
t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
|
|
t->c_iflag |= IGNBRK;
|
|
t->c_oflag &= ~OPOST;
|
|
t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP);
|
|
t->c_cflag &= ~(CSIZE|PARENB);
|
|
t->c_cflag |= CS8|CREAD;
|
|
t->c_cc[VMIN] = 1;
|
|
t->c_cc[VTIME] = 0;
|
|
}
|
|
|
|
void
|
|
stty_telos(int fd)
|
|
{
|
|
struct termios options;
|
|
speed_t speed = b_rate;
|
|
|
|
/* if(fcntl(fd, F_SETFL, 0) < 0) {
|
|
perror("could not set fcntl");
|
|
exit(-1);
|
|
}*/
|
|
|
|
if(tcgetattr(fd, &options) < 0) {
|
|
perror("could not get options");
|
|
exit(-1);
|
|
}
|
|
|
|
cfsetispeed(&options, speed);
|
|
cfsetospeed(&options, speed);
|
|
/* Enable the receiver and set local mode */
|
|
options.c_cflag |= (CLOCAL | CREAD);
|
|
/* Mask the character size bits and turn off (odd) parity */
|
|
options.c_cflag &= ~(CSIZE|PARENB|PARODD);
|
|
/* Select 8 data bits */
|
|
options.c_cflag |= CS8;
|
|
|
|
/* Raw input */
|
|
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
|
|
/* Raw output */
|
|
options.c_oflag &= ~OPOST;
|
|
|
|
if (tcsetattr(fd, TCSANOW, &options) < 0) {
|
|
perror("could not set options");
|
|
exit(-1);
|
|
}
|
|
|
|
#if 0
|
|
struct termios tty;
|
|
speed_t speed = b_rate;
|
|
int i;
|
|
|
|
if(tcflush(fd, TCIOFLUSH) == -1) err(1, "tcflush");
|
|
|
|
if(tcgetattr(fd, &tty) == -1) err(1, "tcgetattr");
|
|
|
|
cfmakeraw(&tty);
|
|
|
|
/* Nonblocking read. */
|
|
tty.c_cc[VTIME] = 0;
|
|
tty.c_cc[VMIN] = 0;
|
|
tty.c_cflag &= ~CRTSCTS;
|
|
tty.c_cflag &= ~HUPCL;
|
|
tty.c_cflag &= ~CLOCAL;
|
|
|
|
cfsetispeed(&tty, speed);
|
|
cfsetospeed(&tty, speed);
|
|
|
|
if(tcsetattr(fd, TCSAFLUSH, &tty) == -1) err(1, "tcsetattr");
|
|
|
|
#if 1
|
|
/* Nonblocking read and write. */
|
|
/* if(fcntl(fd, F_SETFL, O_NONBLOCK) == -1) err(1, "fcntl"); */
|
|
|
|
tty.c_cflag |= CLOCAL;
|
|
if(tcsetattr(fd, TCSAFLUSH, &tty) == -1) err(1, "tcsetattr");
|
|
|
|
i = TIOCM_DTR;
|
|
if(ioctl(fd, TIOCMBIS, &i) == -1) err(1, "ioctl");
|
|
#endif
|
|
|
|
usleep(10*1000); /* Wait for hardware 10ms. */
|
|
|
|
/* Flush input and output buffers. */
|
|
if(tcflush(fd, TCIOFLUSH) == -1) err(1, "tcflush");
|
|
#endif /* 0 */
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
devopen(const char *dev, int flags)
|
|
{
|
|
char t[32];
|
|
strcpy(t, "/dev/");
|
|
strcat(t, dev);
|
|
return open(t, flags);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/*const char *ipaddr;*/
|
|
/*const char *netmask;*/
|
|
static int got_sigalarm;
|
|
void
|
|
sigalarm(int signo)
|
|
{
|
|
got_sigalarm = 1;
|
|
return;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
sigalarm_reset()
|
|
{
|
|
#ifdef linux
|
|
#define TIMEOUT (997*1000)
|
|
#else
|
|
#define TIMEOUT (2451*1000)
|
|
#endif
|
|
ualarm(TIMEOUT, TIMEOUT);
|
|
got_sigalarm = 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int c;
|
|
int slipfd, maxfd;
|
|
int ret;
|
|
fd_set rset, wset;
|
|
FILE *inslip;
|
|
const char *siodev = NULL;
|
|
const char *dhcp_server = NULL;
|
|
/* u_int16_t myport = BOOTPS, dhport = BOOTPS;*/
|
|
int baudrate = -2;
|
|
char buf[4000];
|
|
int logging = 0;
|
|
|
|
ip_id = getpid() * time(NULL);
|
|
|
|
setvbuf(stdout, NULL, _IOLBF, 0); /* Line buffered output. */
|
|
|
|
while((c = getopt(argc, argv, "B:D:hls:t:T")) != -1) {
|
|
switch (c) {
|
|
case 'B':
|
|
baudrate = atoi(optarg);
|
|
break;
|
|
|
|
case 'D':
|
|
dhcp_server = optarg;
|
|
break;
|
|
|
|
case 's':
|
|
if(strncmp("/dev/", optarg, 5) == 0) {
|
|
siodev = optarg + 5;
|
|
} else {
|
|
siodev = optarg;
|
|
}
|
|
break;
|
|
|
|
#if 0
|
|
case 't':
|
|
if(strncmp("/dev/", optarg, 5) == 0) {
|
|
strcpy(tundev, optarg + 5);
|
|
} else {
|
|
strcpy(tundev, optarg);
|
|
}
|
|
break;
|
|
#endif /* 0 */
|
|
|
|
case 'T':
|
|
should_print = 1;
|
|
break;
|
|
|
|
case 'l':
|
|
logging = 1;
|
|
break;
|
|
|
|
case '?':
|
|
case 'h':
|
|
default:
|
|
err(1, "usage: wpcapslip [-B baudrate] [-s siodev] [-D dhcp-server] [-T] ipaddress netmask [dhcp-server]");
|
|
break;
|
|
}
|
|
}
|
|
argc -= (optind - 1);
|
|
argv += (optind - 1);
|
|
|
|
if(argc != 4) {
|
|
err(1, "usage: wpcapslip [-s siodev] [-D dhcp-server] [-T] <IP address of local Ethernet card> <IP address of SLIP network> <netmask of SLIP network>");
|
|
}
|
|
/* ipaddr = argv[1];
|
|
netmask = argv[2];*/
|
|
wpcap_start(argv[1], argv[2], argv[3], logging);
|
|
/* netaddr = inet_addr(ipaddr) & inet_addr(netmask);*/
|
|
|
|
switch(baudrate) {
|
|
case -2:
|
|
break; /* Use default. */
|
|
case 9600:
|
|
b_rate = B9600;
|
|
break;
|
|
case 19200:
|
|
b_rate = B19200;
|
|
break;
|
|
case 38400:
|
|
b_rate = B38400;
|
|
break;
|
|
case 57600:
|
|
b_rate = B57600;
|
|
break;
|
|
case 115200:
|
|
b_rate = B115200;
|
|
break;
|
|
default:
|
|
err(1, "unknown baudrate %d", baudrate);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Set up DHCP relay agent socket and find the address of this relay
|
|
* agent.
|
|
*/
|
|
#if 0
|
|
if(argc == 4) {
|
|
dhcp_server = argv[3];
|
|
}
|
|
if(dhcp_server != NULL) {
|
|
struct sockaddr_in myaddr;
|
|
socklen_t len;
|
|
in_addr_t a;
|
|
|
|
if(strchr(dhcp_server, ':') != NULL) {
|
|
dhport = atoi(strchr(dhcp_server, ':') + 1);
|
|
myport = dhport + 1;
|
|
*strchr(dhcp_server, ':') = '\0';
|
|
}
|
|
a = inet_addr(dhcp_server);
|
|
if(a == -1) {
|
|
err(1, "illegal dhcp-server address");
|
|
}
|
|
#ifndef linux
|
|
dhaddr.sin_len = sizeof(dhaddr);
|
|
#endif
|
|
dhaddr.sin_family = AF_INET;
|
|
dhaddr.sin_port = uip_htons(dhport);
|
|
dhaddr.sin_addr.s_addr = a;
|
|
|
|
dhsock = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if(dhsock < 0) {
|
|
err (1, "socket");
|
|
}
|
|
memset(&myaddr, 0x0, sizeof(myaddr));
|
|
#ifndef linux
|
|
myaddr.sin_len = sizeof(myaddr);
|
|
#endif
|
|
myaddr.sin_family = AF_INET;
|
|
myaddr.sin_addr.s_addr = INADDR_ANY;
|
|
myaddr.sin_port = uip_htons(myport);
|
|
if(bind(dhsock, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
|
|
err(1, "bind dhcp-relay");
|
|
}
|
|
|
|
if(connect(dhsock, (struct sockaddr *)&dhaddr, sizeof(dhaddr)) < 0) {
|
|
err(1, "connect to dhcp-server");
|
|
}
|
|
|
|
len = sizeof(myaddr);
|
|
if(getsockname(dhsock, (struct sockaddr *)&myaddr, &len) < 0) {
|
|
err(1, "getsockname dhsock");
|
|
}
|
|
|
|
giaddr = myaddr.sin_addr.s_addr;
|
|
|
|
/*
|
|
* Don't want connected socket.
|
|
*/
|
|
close(dhsock);
|
|
dhsock = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if(dhsock < 0) {
|
|
err (1, "socket");
|
|
}
|
|
myaddr.sin_family = AF_INET;
|
|
myaddr.sin_addr.s_addr = INADDR_ANY;
|
|
myaddr.sin_port = uip_htons(myport);
|
|
if(bind(dhsock, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
|
|
err(1, "bind dhcp-relay");
|
|
}
|
|
fprintf(stderr, "DHCP server at %s:%d\n", dhcp_server, dhport);
|
|
}
|
|
#endif /* 0 */
|
|
|
|
if(siodev != NULL) {
|
|
slipfd = devopen(siodev, O_RDWR | O_NONBLOCK | O_NOCTTY | O_NDELAY | O_DIRECT | O_SYNC );
|
|
if(slipfd == -1) {
|
|
err(1, "can't open siodev ``/dev/%s''", siodev);
|
|
}
|
|
} else {
|
|
static const char *siodevs[] = {
|
|
"ttyUSB0", "cuaU0", "ucom0" /* linux, fbsd6, fbsd5 */
|
|
};
|
|
int i;
|
|
for(i = 0; i < 3; i++) {
|
|
siodev = siodevs[i];
|
|
slipfd = devopen(siodev, O_RDWR | O_NONBLOCK);
|
|
if(slipfd != -1) {
|
|
break;
|
|
}
|
|
}
|
|
if(slipfd == -1) {
|
|
err(1, "can't open siodev");
|
|
}
|
|
}
|
|
fprintf(stderr, "slip started on ``/dev/%s''\n", siodev);
|
|
stty_telos(slipfd);
|
|
slip_send(slipfd, SLIP_END);
|
|
inslip = fdopen(slipfd, "r");
|
|
if(inslip == NULL) {
|
|
err(1, "main: fdopen");
|
|
}
|
|
|
|
/* tunfd = tun_alloc(tundev);
|
|
if(tunfd == -1) err(1, "main: open");
|
|
fprintf(stderr, "opened device ``/dev/%s''\n", tundev);*/
|
|
|
|
atexit(cleanup);
|
|
signal(SIGHUP, sigcleanup);
|
|
signal(SIGTERM, sigcleanup);
|
|
signal(SIGINT, sigcleanup);
|
|
signal(SIGALRM, sigalarm);
|
|
/* ifconf(tundev, ipaddr, netmask);*/
|
|
|
|
while(1) {
|
|
maxfd = 0;
|
|
FD_ZERO(&rset);
|
|
FD_ZERO(&wset);
|
|
|
|
if(got_sigalarm) {
|
|
/* Send "?IPA". */
|
|
slip_send(slipfd, '?');
|
|
slip_send(slipfd, 'I');
|
|
slip_send(slipfd, 'P');
|
|
slip_send(slipfd, 'A');
|
|
slip_send(slipfd, SLIP_END);
|
|
got_sigalarm = 0;
|
|
}
|
|
|
|
if(!slip_empty()) { /* Anything to flush? */
|
|
FD_SET(slipfd, &wset);
|
|
}
|
|
|
|
FD_SET(slipfd, &rset); /* Read from slip ASAP! */
|
|
if(slipfd > maxfd) {
|
|
maxfd = slipfd;
|
|
}
|
|
|
|
/* We only have one packet at a time queued for slip output. */
|
|
if(slip_empty()) {
|
|
/* FD_SET(tunfd, &rset);
|
|
if(tunfd > maxfd) maxfd = tunfd;
|
|
if(dhsock != -1) {
|
|
FD_SET(dhsock, &rset);
|
|
if(dhsock > maxfd) maxfd = dhsock;
|
|
}*/
|
|
}
|
|
|
|
|
|
if(slip_empty()) {
|
|
char *pbuf = buf;
|
|
|
|
ret = wpcap_poll(&pbuf);
|
|
if(ret > 0) {
|
|
struct ip *iphdr = (struct ip *)pbuf;
|
|
if(iphdr->ip_id != last_id) {
|
|
last_id = iphdr->ip_id;
|
|
/* printf("------ wpcap_poll ret %d\n", ret);*/
|
|
print_packet(pbuf, ret);
|
|
write_to_serial(slipfd, pbuf, ret);
|
|
slip_flushbuf(slipfd);
|
|
sigalarm_reset();
|
|
}
|
|
}
|
|
/* } else {
|
|
printf("!slip_empty\n");*/
|
|
}
|
|
{
|
|
struct timeval tv;
|
|
tv.tv_sec = 0;
|
|
tv.tv_usec = 10;
|
|
ret = select(maxfd + 1, &rset, &wset, NULL, &tv);
|
|
}
|
|
if(ret == -1 && errno != EINTR) {
|
|
err(1, "select");
|
|
} else if(ret > 0) {
|
|
if(FD_ISSET(slipfd, &rset)) {
|
|
/* printf("serial_to_wpcap\n");*/
|
|
/*serial_to_tun(inslip, tunfd);*/
|
|
serial_to_wpcap(inslip);
|
|
/* printf("End of serial_to_wpcap\n");*/
|
|
}
|
|
|
|
if(FD_ISSET(slipfd, &wset)) {
|
|
/* printf("slip_flushbuf\n");*/
|
|
slip_flushbuf(slipfd);
|
|
sigalarm_reset();
|
|
}
|
|
|
|
/* if(slip_empty() && FD_ISSET(tunfd, &rset)) {
|
|
tun_to_serial(tunfd, slipfd);
|
|
slip_flushbuf(slipfd);
|
|
sigalarm_reset();
|
|
}*/
|
|
|
|
#if 0
|
|
if(dhsock != -1 && slip_empty() && FD_ISSET(dhsock, &rset)) {
|
|
relay_dhcp_to_client(slipfd);
|
|
slip_flushbuf(slipfd);
|
|
}
|
|
#endif /* 0 */
|
|
}
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|