547 lines
14 KiB
C
547 lines
14 KiB
C
/*
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* Copyright (c) 2001, Adam Dunkels.
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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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* 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. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* Below define allows importing saved output into Wireshark as "Raw IP" packet type */
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#define WIRESHARK_IMPORT_FORMAT 1
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#include "contiki.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 <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <termios.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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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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#include "net/netstack.h"
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#include "net/packetbuf.h"
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#include "cmd.h"
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#include "border-router-cmds.h"
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extern int slip_config_verbose;
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extern int slip_config_flowcontrol;
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extern const char *slip_config_siodev;
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extern const char *slip_config_host;
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extern const char *slip_config_port;
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extern uint16_t slip_config_basedelay;
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extern speed_t slip_config_b_rate;
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#ifdef SLIP_DEV_CONF_SEND_DELAY
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#define SEND_DELAY SLIP_DEV_CONF_SEND_DELAY
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#else
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#define SEND_DELAY 0
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#endif
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int devopen(const char *dev, int flags);
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static FILE *inslip;
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/* for statistics */
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long slip_sent = 0;
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long slip_received = 0;
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int slipfd = 0;
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//#define PROGRESS(s) fprintf(stderr, s)
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#define PROGRESS(s) do { } while(0)
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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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/*---------------------------------------------------------------------------*/
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static 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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/*---------------------------------------------------------------------------*/
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static int
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connect_to_server(const char *host, const char *port)
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{
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/* Setup TCP connection */
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struct addrinfo hints, *servinfo, *p;
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char s[INET6_ADDRSTRLEN];
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int rv, fd;
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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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return -1;
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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((fd = socket(p->ai_family, p->ai_socktype, 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(fd, p->ai_addr, p->ai_addrlen) == -1) {
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close(fd);
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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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return -1;
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}
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fcntl(fd, 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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/* all done with this structure */
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freeaddrinfo(servinfo);
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return fd;
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}
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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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/*---------------------------------------------------------------------------*/
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void
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slip_packet_input(unsigned char *data, int len)
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{
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packetbuf_copyfrom(data, len);
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if(slip_config_verbose > 0) {
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printf("Packet input over SLIP: %d\n", len);
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}
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NETSTACK_RDC.input();
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}
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/*---------------------------------------------------------------------------*/
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/*
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* Read from serial, when we have a packet call slip_packet_input. 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_input(FILE *inslip)
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{
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static unsigned char inbuf[2048];
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static int inbufptr = 0;
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int ret,i;
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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_input: 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(inbuf)) {
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fprintf(stderr, "*** dropping large %d byte packet\n", inbufptr);
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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_input: 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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}
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slip_received++;
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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(inbuf[0] == '!') {
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command_context = CMD_CONTEXT_RADIO;
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cmd_input(inbuf, inbufptr);
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} else if(inbuf[0] == '?') {
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#define DEBUG_LINE_MARKER '\r'
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} else if(inbuf[0] == DEBUG_LINE_MARKER) {
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fwrite(inbuf + 1, inbufptr - 1, 1, stdout);
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} else if(is_sensible_string(inbuf, inbufptr)) {
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if(slip_config_verbose == 1) { /* strings already echoed below for verbose>1 */
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fwrite(inbuf, inbufptr, 1, stdout);
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}
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} else {
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if(slip_config_verbose > 2) {
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printf("Packet from SLIP of length %d - write TUN\n", inbufptr);
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if(slip_config_verbose > 4) {
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#if WIRESHARK_IMPORT_FORMAT
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printf("0000");
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for(i = 0; i < inbufptr; i++) printf(" %02x", inbuf[i]);
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#else
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printf(" ");
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for(i = 0; i < inbufptr; i++) {
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printf("%02x", inbuf[i]);
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if((i & 3) == 3) printf(" ");
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if((i & 15) == 15) printf("\n ");
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}
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#endif
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printf("\n");
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}
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}
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slip_packet_input(inbuf, inbufptr);
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}
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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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inbuf[inbufptr++] = c;
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/* Echo lines as they are received for verbose=2,3,5+ */
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/* Echo all printable characters for verbose==4 */
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if(slip_config_verbose == 4) {
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if(c == 0 || c == '\r' || c == '\n' || c == '\t' || (c >= ' ' && c <= '~')) {
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fwrite(&c, 1, 1, stdout);
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}
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} else if(slip_config_verbose >= 2) {
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if(c == '\n' && is_sensible_string(inbuf, inbufptr)) {
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fwrite(inbuf, inbufptr, 1, stdout);
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inbufptr = 0;
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}
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}
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break;
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}
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goto read_more;
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}
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unsigned char slip_buf[2048];
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int slip_end, slip_begin, slip_packet_end, slip_packet_count;
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static struct timer send_delay_timer;
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/* delay between slip packets */
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static clock_time_t send_delay = SEND_DELAY;
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/*---------------------------------------------------------------------------*/
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static 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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slip_sent++;
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if(c == SLIP_END) {
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/* Full packet received. */
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slip_packet_count++;
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if(slip_packet_end == 0) {
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slip_packet_end = slip_end;
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}
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}
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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_packet_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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}
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n = write(fd, slip_buf + slip_begin, slip_packet_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"); /* Outqueue is full! */
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} else {
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slip_begin += n;
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if(slip_begin == slip_packet_end) {
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slip_packet_count--;
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if(slip_end > slip_packet_end) {
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memcpy(slip_buf, slip_buf + slip_packet_end,
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slip_end - slip_packet_end);
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}
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slip_end -= slip_packet_end;
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slip_begin = slip_packet_end = 0;
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if(slip_end > 0) {
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/* Find end of next slip packet */
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for(n = 1; n < slip_end; n++) {
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if(slip_buf[n] == SLIP_END) {
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slip_packet_end = n + 1;
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break;
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}
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}
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/* a delay between slip packets to avoid losing data */
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if(send_delay > 0) {
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timer_set(&send_delay_timer, send_delay);
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}
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}
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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write_to_serial(int outfd, const uint8_t *inbuf, int len)
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{
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const uint8_t *p = inbuf;
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int i;
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if(slip_config_verbose > 2) {
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#ifdef __CYGWIN__
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printf("Packet from WPCAP of length %d - write SLIP\n", len);
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#else
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printf("Packet from TUN of length %d - write SLIP\n", len);
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#endif
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if(slip_config_verbose > 4) {
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#if WIRESHARK_IMPORT_FORMAT
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printf("0000");
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for(i = 0; i < len; i++) printf(" %02x", p[i]);
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#else
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printf(" ");
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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) printf(" ");
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if((i & 15) == 15) printf("\n ");
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}
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#endif
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printf("\n");
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}
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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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PROGRESS("t");
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}
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/*---------------------------------------------------------------------------*/
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/* writes an 802.15.4 packet to slip-radio */
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void
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write_to_slip(const uint8_t *buf, int len)
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{
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if(slipfd > 0) {
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write_to_serial(slipfd, buf, len);
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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stty_telos(int fd)
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{
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struct termios tty;
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speed_t speed = slip_config_b_rate;
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int i;
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if(tcflush(fd, TCIOFLUSH) == -1) err(1, "tcflush");
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if(tcgetattr(fd, &tty) == -1) err(1, "tcgetattr");
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cfmakeraw(&tty);
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/* Nonblocking read. */
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tty.c_cc[VTIME] = 0;
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tty.c_cc[VMIN] = 0;
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if(slip_config_flowcontrol) {
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tty.c_cflag |= CRTSCTS;
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} else {
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tty.c_cflag &= ~CRTSCTS;
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}
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tty.c_cflag &= ~HUPCL;
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tty.c_cflag &= ~CLOCAL;
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cfsetispeed(&tty, speed);
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cfsetospeed(&tty, speed);
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if(tcsetattr(fd, TCSAFLUSH, &tty) == -1) err(1, "tcsetattr");
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#if 1
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/* Nonblocking read and write. */
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/* if(fcntl(fd, F_SETFL, O_NONBLOCK) == -1) err(1, "fcntl"); */
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tty.c_cflag |= CLOCAL;
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if(tcsetattr(fd, TCSAFLUSH, &tty) == -1) err(1, "tcsetattr");
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i = TIOCM_DTR;
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if(ioctl(fd, TIOCMBIS, &i) == -1) err(1, "ioctl");
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#endif
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usleep(10*1000); /* Wait for hardware 10ms. */
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/* Flush input and output buffers. */
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if(tcflush(fd, TCIOFLUSH) == -1) err(1, "tcflush");
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}
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/*---------------------------------------------------------------------------*/
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static int
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set_fd(fd_set *rset, fd_set *wset)
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{
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/* Anything to flush? */
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if(!slip_empty() && (send_delay == 0 || timer_expired(&send_delay_timer))) {
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FD_SET(slipfd, wset);
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}
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FD_SET(slipfd, rset); /* Read from slip ASAP! */
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static void
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handle_fd(fd_set *rset, fd_set *wset)
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{
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if(FD_ISSET(slipfd, rset)) {
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serial_input(inslip);
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}
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if(FD_ISSET(slipfd, wset)) {
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slip_flushbuf(slipfd);
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}
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}
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/*---------------------------------------------------------------------------*/
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static const struct select_callback slip_callback = { set_fd, handle_fd };
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/*---------------------------------------------------------------------------*/
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void
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slip_init(void)
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{
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setvbuf(stdout, NULL, _IOLBF, 0); /* Line buffered output. */
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if(slip_config_host != NULL) {
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if(slip_config_port == NULL) {
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slip_config_port = "60001";
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}
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slipfd = connect_to_server(slip_config_host, slip_config_port);
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if(slipfd == -1) {
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err(1, "can't connect to ``%s:%s''", slip_config_host, slip_config_port);
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}
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} else if(slip_config_siodev != NULL) {
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if(strcmp(slip_config_siodev, "null") == 0) {
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/* Disable slip */
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return;
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}
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slipfd = devopen(slip_config_siodev, O_RDWR | O_NONBLOCK);
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if(slipfd == -1) {
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err(1, "can't open siodev ``/dev/%s''", slip_config_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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slip_config_siodev = siodevs[i];
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slipfd = devopen(slip_config_siodev, O_RDWR | O_NONBLOCK);
|
|
if(slipfd != -1) {
|
|
break;
|
|
}
|
|
}
|
|
if(slipfd == -1) {
|
|
err(1, "can't open siodev");
|
|
}
|
|
}
|
|
|
|
select_set_callback(slipfd, &slip_callback);
|
|
|
|
if(slip_config_host != NULL) {
|
|
fprintf(stderr, "********SLIP opened to ``%s:%s''\n", slip_config_host,
|
|
slip_config_port);
|
|
} else {
|
|
fprintf(stderr, "********SLIP started on ``/dev/%s''\n", slip_config_siodev);
|
|
stty_telos(slipfd);
|
|
}
|
|
|
|
timer_set(&send_delay_timer, 0);
|
|
slip_send(slipfd, SLIP_END);
|
|
inslip = fdopen(slipfd, "r");
|
|
if(inslip == NULL) {
|
|
err(1, "main: fdopen");
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|