Added option to connect to server instead of serial port
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nifi
parent
4aba60ad25
commit
99b2dd8ef7
1 changed files with 125 additions and 42 deletions
167
tools/tunslip6.c
167
tools/tunslip6.c
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2001, Adam Dunkels.
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* Copyright (c) 2009, 2010 Joakim Eriksson, Niclas Finne.
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* Copyright (c) 2009, 2010 Joakim Eriksson, Niclas Finne, Dogan Yazar.
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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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@ -29,7 +29,7 @@
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*
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* This file is part of the uIP TCP/IP stack.
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*
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* $Id: tunslip6.c,v 1.2 2010/04/16 12:39:46 joxe Exp $
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* $Id: tunslip6.c,v 1.3 2010/05/07 12:22:41 nifi Exp $
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*
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*/
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@ -50,6 +50,7 @@
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <err.h>
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@ -62,7 +63,7 @@ void write_to_serial(int outfd, void *inbuf, int len);
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//#define PROGRESS(s) fprintf(stderr, s)
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#define PROGRESS(s) do { } while (0)
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char tundev[32] = { "tun0" };
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char tundev[32] = { "" };
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int
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ssystem(const char *fmt, ...) __attribute__((__format__ (__printf__, 1, 2)));
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@ -86,6 +87,16 @@ ssystem(const char *fmt, ...)
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#define SLIP_ESC_ESC 0335
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/* get sockaddr, IPv4 or IPv6: */
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void *
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get_in_addr(struct sockaddr *sa)
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{
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if(sa->sa_family == AF_INET) {
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return &(((struct sockaddr_in*)sa)->sin_addr);
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}
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return &(((struct sockaddr_in6*)sa)->sin6_addr);
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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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@ -124,6 +135,7 @@ serial_to_tun(FILE *inslip, int outfd)
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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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fprintf(stderr, "*** dropping too large packet\n");
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}
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ret = fread(&c, 1, 1, inslip);
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#ifdef linux
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@ -135,21 +147,19 @@ serial_to_tun(FILE *inslip, int outfd)
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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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if(uip.inbuf[0] == '!') {
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if (uip.inbuf[1] == 'M') {
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if(uip.inbuf[1] == 'M') {
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/* Read gateway MAC address and autoconfigure tap0 interface */
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char macs[24];
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int i, pos;
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for(i = 0, pos = 0; i < 16; i++) {
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macs[pos++] = uip.inbuf[2 + i];
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if ((i & 1) == 1 && i < 14) {
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if((i & 1) == 1 && i < 14) {
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macs[pos++] = ':';
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}
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}
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@ -166,7 +176,7 @@ serial_to_tun(FILE *inslip, int outfd)
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} else if(is_sensible_string(uip.inbuf, inbufptr)) {
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fwrite(uip.inbuf, inbufptr, 1, stdout);
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} else {
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if (verbose) printf("Writing to tun len: %d\n", inbufptr);
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if(verbose) printf("Writing to tun len: %d\n", inbufptr);
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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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@ -206,8 +216,9 @@ int slip_end, slip_begin;
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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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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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@ -223,9 +234,10 @@ 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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if(slip_empty()) {
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return;
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}
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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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@ -244,14 +256,15 @@ 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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int i;
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if (verbose) {
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if(verbose) {
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printf("Got packet of length %d - write SLIP\n", len);
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for(i = 0; i < len; i++) {
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printf("%02x", p[i]);
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if((i & 3) == 3)
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if((i & 3) == 3) {
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printf(" ");
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}
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if((i & 15) == 15)
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printf("\n");
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}
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@ -279,7 +292,6 @@ write_to_serial(int outfd, void *inbuf, int len)
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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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PROGRESS("t");
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@ -354,7 +366,7 @@ devopen(const char *dev, int flags)
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{
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char t[32];
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strcpy(t, "/dev/");
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strcat(t, dev);
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strncat(t, dev, sizeof(t) - 5);
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return open(t, flags);
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}
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@ -368,8 +380,9 @@ tun_alloc(char *dev, int tap)
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struct ifreq ifr;
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int fd, err;
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if( (fd = open("/dev/net/tun", O_RDWR)) < 0 )
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if( (fd = open("/dev/net/tun", O_RDWR)) < 0 ) {
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return -1;
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}
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memset(&ifr, 0, sizeof(ifr));
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@ -382,7 +395,7 @@ tun_alloc(char *dev, int tap)
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if(*dev != 0)
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strncpy(ifr.ifr_name, dev, IFNAMSIZ);
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if((err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ){
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if((err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ) {
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close(fd);
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return err;
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}
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@ -465,13 +478,18 @@ main(int argc, char **argv)
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fd_set rset, wset;
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FILE *inslip;
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const char *siodev = NULL;
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const char *host = NULL;
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const char *port = NULL;
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const char *prog;
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int baudrate = -2;
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int tap = 0;
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slipfd = 0;
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prog = argv[0];
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setvbuf(stdout, NULL, _IOLBF, 0); /* Line buffered output. */
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while((c = getopt(argc, argv, "B:D:hs:t:v:T")) != -1) {
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switch (c) {
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while((c = getopt(argc, argv, "B:D:hs:t:v:a:p:T")) != -1) {
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switch(c) {
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case 'B':
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baudrate = atoi(optarg);
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break;
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@ -486,22 +504,30 @@ main(int argc, char **argv)
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case 't':
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if(strncmp("/dev/", optarg, 5) == 0) {
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strcpy(tundev, optarg + 5);
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strncpy(tundev, optarg + 5, sizeof(tundev));
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} else {
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strcpy(tundev, optarg);
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strncpy(tundev, optarg, sizeof(tundev));
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}
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break;
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case 'a':
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host = optarg;
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break;
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case 'p':
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port = optarg;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'T':
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printf("TAP");
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tap = 1;
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break;
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case '?':
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case 'h':
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default:
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err(1, "usage: tunslip6 [-B baudrate] [-s siodev] [-t tundev] [-T] ipaddress");
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err(1, "usage: %s [-B baudrate] [-s siodev] [-t tundev] [-T] [-a serveraddress] [-p serverport] ipaddress", prog);
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break;
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}
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}
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@ -509,7 +535,7 @@ main(int argc, char **argv)
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argv += (optind - 1);
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if(argc != 2 && argc != 3) {
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err(1, "usage: tunslip6 [-B baudrate] [-s siodev] [-t tundev] [-T] ipaddress ");
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err(1, "usage: %s [-B baudrate] [-s siodev] [-t tundev] [-T] [-a serveraddress] [-p serverport] ipaddress", prog);
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}
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ipaddr = argv[1];
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@ -536,36 +562,93 @@ main(int argc, char **argv)
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break;
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}
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if(*tundev == '\0') {
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/* Use default. */
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if(tap) {
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strcpy(tundev, "tap0");
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} else {
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strcpy(tundev, "tun0");
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}
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}
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if(host != NULL) {
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struct addrinfo hints, *servinfo, *p;
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int rv;
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char s[INET6_ADDRSTRLEN];
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if(siodev != NULL) {
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if(port == NULL) {
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port = "60001";
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}
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memset(&hints, 0, sizeof hints);
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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if((rv = getaddrinfo(host, port, &hints, &servinfo)) != 0) {
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err(1, "getaddrinfo: %s", gai_strerror(rv));
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}
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/* loop through all the results and connect to the first we can */
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for(p = servinfo; p != NULL; p = p->ai_next) {
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if((slipfd = socket(p->ai_family, p->ai_socktype,
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p->ai_protocol)) == -1) {
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perror("client: socket");
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continue;
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}
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if(connect(slipfd, p->ai_addr, p->ai_addrlen) == -1) {
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close(slipfd);
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perror("client: connect");
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continue;
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}
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break;
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}
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if(p == NULL) {
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err(1, "can't connect to ``%s:%s''", host, port);
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}
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fcntl(slipfd, F_SETFL, O_NONBLOCK);
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inet_ntop(p->ai_family, get_in_addr((struct sockaddr *)p->ai_addr),
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s, sizeof(s));
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fprintf(stderr, "slip connected to ``%s:%s''\n", s, port);
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/* all done with this structure */
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freeaddrinfo(servinfo);
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} else {
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if(siodev != NULL) {
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slipfd = devopen(siodev, O_RDWR | O_NONBLOCK);
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if(slipfd == -1) {
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err(1, "can't open siodev ``/dev/%s''", siodev);
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}
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} else {
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static const char *siodevs[] = {
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"ttyUSB0", "cuaU0", "ucom0" /* linux, fbsd6, fbsd5 */
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};
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int i;
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for(i = 0; i < 3; i++) {
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siodev = siodevs[i];
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slipfd = devopen(siodev, O_RDWR | O_NONBLOCK);
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if (slipfd != -1)
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break;
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}
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if(slipfd == -1) {
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err(1, "can't open siodev");
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} else {
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static const char *siodevs[] = {
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"ttyUSB0", "cuaU0", "ucom0" /* linux, fbsd6, fbsd5 */
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};
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int i;
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for(i = 0; i < 3; i++) {
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siodev = siodevs[i];
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slipfd = devopen(siodev, O_RDWR | O_NONBLOCK);
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if(slipfd != -1) {
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break;
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}
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}
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if(slipfd == -1) {
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err(1, "can't open siodev");
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}
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}
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fprintf(stderr, "slip started on ``/dev/%s''\n", siodev);
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stty_telos(slipfd);
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}
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fprintf(stderr, "slip started on ``/dev/%s''\n", siodev);
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stty_telos(slipfd);
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slip_send(slipfd, SLIP_END);
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inslip = fdopen(slipfd, "r");
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if(inslip == NULL) err(1, "main: fdopen");
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tunfd = tun_alloc(tundev, tap);
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if(tunfd == -1) err(1, "main: open");
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fprintf(stderr, "opened device ``/dev/%s''\n", tundev);
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fprintf(stderr, "opened %s device ``/dev/%s''\n",
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tap ? "tap" : "tun", tundev);
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atexit(cleanup);
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signal(SIGHUP, sigcleanup);
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