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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <signal.h>
#include <ctype.h>
#include <netdb.h>
#include <config.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#ifdef HAVE_NETAX25_AX25_H
#include <netax25/ax25.h>
#else
#include <netax25/kernel_ax25.h>
#endif
#ifdef HAVE_NETROM_NETROM_H
#include <netrom/netrom.h>
#else
#include <netax25/kernel_netrom.h>
#endif
#ifdef HAVE_NETROSE_ROSE_H
#include <netrose/rose.h>
#else
#include <netax25/kernel_rose.h>
#endif
#include <netax25/axlib.h>
#include <netax25/nrconfig.h>
#include "../pathnames.h"
char *callsign;
int mtu = 0;
int readconfig(char *port)
{
FILE *fp;
char buffer[90], *s;
int n = 0;
if ((fp = fopen(CONF_NRPORTS_FILE, "r")) == NULL) {
fprintf(stderr, "nrattach: cannot open nrports file\n");
return FALSE;
}
while (fgets(buffer, 90, fp) != NULL) {
n++;
if ((s = strchr(buffer, '\n')) != NULL)
*s = '\0';
if (strlen(buffer) > 0 && *buffer == '#')
continue;
if ((s = strtok(buffer, " \t\r\n")) == NULL) {
fprintf(stderr, "nrattach: unable to parse line %d of the nrports file\n", n);
return FALSE;
}
if (strcmp(s, port) != 0)
continue;
if ((s = strtok(NULL, " \t\r\n")) == NULL) {
fprintf(stderr, "nrattach: unable to parse line %d of the nrports file\n", n);
return FALSE;
}
callsign = strdup(s);
if ((s = strtok(NULL, " \t\r\n")) == NULL) {
fprintf(stderr, "nrattach: unable to parse line %d of the nrports file\n", n);
return FALSE;
}
if ((s = strtok(NULL, " \t\r\n")) == NULL) {
fprintf(stderr, "nrattach: unable to parse line %d of the nrports file\n", n);
return FALSE;
}
if (mtu == 0) {
if ((mtu = atoi(s)) <= 0) {
fprintf(stderr, "nrattach: invalid paclen setting\n");
return FALSE;
}
}
fclose(fp);
return TRUE;
}
fclose(fp);
fprintf(stderr, "nrattach: cannot find port %s in nrports\n", port);
return FALSE;
}
int getfreedev(char *dev)
{
struct ifreq ifr;
int fd;
int i;
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("nrattach: socket");
return FALSE;
}
for (i = 0; i < 4; i++) {
sprintf(dev, "nr%d", i);
strcpy(ifr.ifr_name, dev);
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
perror("nrattach: SIOCGIFFLAGS");
return FALSE;
}
if (!(ifr.ifr_flags & IFF_UP)) {
close(fd);
return TRUE;
}
}
close(fd);
return FALSE;
}
int startiface(char *dev, struct hostent *hp)
{
struct ifreq ifr;
char call[7];
int fd;
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("nrattach: socket");
return FALSE;
}
strcpy(ifr.ifr_name, dev);
if (hp != NULL) {
ifr.ifr_addr.sa_family = AF_INET;
ifr.ifr_addr.sa_data[0] = 0;
ifr.ifr_addr.sa_data[1] = 0;
ifr.ifr_addr.sa_data[2] = hp->h_addr_list[0][0];
ifr.ifr_addr.sa_data[3] = hp->h_addr_list[0][1];
ifr.ifr_addr.sa_data[4] = hp->h_addr_list[0][2];
ifr.ifr_addr.sa_data[5] = hp->h_addr_list[0][3];
ifr.ifr_addr.sa_data[6] = 0;
if (ioctl(fd, SIOCSIFADDR, &ifr) < 0) {
perror("nrattach: SIOCSIFADDR");
return FALSE;
}
}
if (ax25_aton_entry(callsign, call) == -1)
return FALSE;
ifr.ifr_hwaddr.sa_family = ARPHRD_NETROM;
memcpy(ifr.ifr_hwaddr.sa_data, call, 7);
if (ioctl(fd, SIOCSIFHWADDR, &ifr) != 0) {
perror("nrattach: SIOCSIFHWADDR");
return FALSE;
}
ifr.ifr_mtu = mtu;
if (ioctl(fd, SIOCSIFMTU, &ifr) < 0) {
perror("nrattach: SIOCSIFMTU");
return FALSE;
}
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
perror("nrattach: SIOCGIFFLAGS");
return FALSE;
}
ifr.ifr_flags &= IFF_NOARP;
ifr.ifr_flags |= IFF_UP;
ifr.ifr_flags |= IFF_RUNNING;
if (ioctl(fd, SIOCSIFFLAGS, &ifr) < 0) {
perror("nrattach: SIOCSIFFLAGS");
return FALSE;
}
close(fd);
return TRUE;
}
int main(int argc, char *argv[])
{
int fd;
char dev[64];
struct hostent *hp = NULL;
while ((fd = getopt(argc, argv, "i:m:v")) != -1) {
switch (fd) {
case 'i':
if ((hp = gethostbyname(optarg)) == NULL) {
fprintf(stderr, "nrattach: invalid internet name/address - %s\n", optarg);
return 1;
}
break;
case 'm':
if ((mtu = atoi(optarg)) <= 0) {
fprintf(stderr, "nrattach: invalid mtu size - %s\n", optarg);
return 1;
}
break;
case 'v':
printf("nrattach: %s\n", VERSION);
return 0;
case ':':
case '?':
fprintf(stderr, "usage: nrattach [-i inetaddr] [-m mtu] [-v] port\n");
return 1;
}
}
if ((argc - optind) != 1) {
fprintf(stderr, "usage: nrattach [-i inetaddr] [-m mtu] [-v] port\n");
return 1;
}
if (!readconfig(argv[optind]))
return 1;
if (!getfreedev(dev)) {
fprintf(stderr, "nrattach: cannot find free NET/ROM device\n");
return 1;
}
if (!startiface(dev, hp))
return 1;
printf("NET/ROM port %s bound to device %s\n", argv[optind], dev);
return 0;
}
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