429 lines
11 KiB
C
429 lines
11 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 "net/uip.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 <signal.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <errno.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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extern int slip_config_verbose;
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extern const char *slip_config_ipaddr;
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extern int slip_config_flowcontrol;
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extern const char *slip_config_siodev;
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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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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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void slip_send(int fd, unsigned char c);
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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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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 union {
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unsigned char inbuf[2000];
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} uip;
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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(uip.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(uip.inbuf[0] == '!') {
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cmd_input(uip.inbuf, inbufptr);
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} else if(uip.inbuf[0] == '?') {
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#define DEBUG_LINE_MARKER '\r'
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} else if(uip.inbuf[0] == DEBUG_LINE_MARKER) {
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fwrite(uip.inbuf + 1, inbufptr - 1, 1, stdout);
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} else if(is_sensible_string(uip.inbuf, inbufptr)) {
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if(slip_config_verbose == 1) { /* strings already echoed below for verbose>1 */
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fwrite(uip.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", uip.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", uip.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(uip.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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uip.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(uip.inbuf, inbufptr)) {
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fwrite(uip.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[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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slip_sent++;
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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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}
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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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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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/* printf("Packet to SLIP: %d\n", len); */
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write_to_serial(slipfd, buf, len);
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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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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_siodev != NULL) {
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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);
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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", slip_config_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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}
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/*---------------------------------------------------------------------------*/
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int
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slip_set_fd(int maxfd, fd_set *rset, fd_set *wset)
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{
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if(!slip_empty()) { /* Anything to flush? */
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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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if(slipfd > maxfd) maxfd = slipfd;
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return maxfd;
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}
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/*---------------------------------------------------------------------------*/
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void
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slip_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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