Import ax25-tools 0.0.1 from tarballax25-tools-0.0.1

1 files changed, 240 insertions, 0 deletions

diff --git a/netrom/nrattach.c b/netrom/nrattach.c
new file mode 100644
index 0000000..aee0936
--- /dev/null
+++ b/netrom/nrattach.c
@@ -0,0 +1,240 @@
+#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 <sys/ioctl.h>
+
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+
+#include <netax25/ax25.h>
+#include <netrose/rose.h>
+#include <netax25/axlib.h>
+
+#include <config.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;
+}