Import ax25-tools 0.0.1 from tarballax25-tools-0.0.1

1 files changed, 164 insertions, 0 deletions

diff --git a/netrom/netromr.c b/netrom/netromr.c
new file mode 100644
index 0000000..eafd225
--- /dev/null
+++ b/netrom/netromr.c
@@ -0,0 +1,164 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <syslog.h>
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <net/ethernet.h>
+
+#include <netax25/ax25.h>
+#include <netrom/netrom.h>
+#include <netrose/rose.h>
+#include <netax25/axlib.h>
+#include "../pathnames.h"
+
+#include "netromd.h"
+
+extern int compliant;
+
+static int validmnemonic(char *mnemonic)
+{
+	if (compliant) {
+		if (strspn(mnemonic, "#_&-/ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789") == strlen(mnemonic))
+			return TRUE;
+	} else {
+		if (strspn(mnemonic, "#_&-/abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789") == strlen(mnemonic))
+			return TRUE;
+	}
+
+	return FALSE;
+}
+
+void receive_nodes(unsigned char *buffer, int length, ax25_address *neighbour, int index)
+{
+	struct nr_route_struct nr_node;
+	char neigh_buffer[90], *portcall, *p;
+	FILE *fp;
+	int s;
+	int quality, obs_count, qual, lock;
+	char *addr, *callsign, *device;
+
+	nr_node.type   = NETROM_NODE;
+	/*nr_node.ndigis = 0;*/
+
+	sprintf(neigh_buffer, "%s/obsolescence_count_initialiser", PROC_NR_SYSCTL_DIR);
+
+	if ((fp = fopen(neigh_buffer, "r")) == NULL) {
+		if (logging)
+			syslog(LOG_ERR, "netromr: cannot open %s\n", neigh_buffer);
+		return;
+	}
+
+	fgets(neigh_buffer, 90, fp);
+	
+	obs_count = atoi(neigh_buffer);
+
+	fclose(fp);
+
+	if ((s = socket(AF_NETROM, SOCK_SEQPACKET, 0)) < 0) {
+		if (logging)
+			syslog(LOG_ERR, "netromr: socket: %m");
+		return;
+	}
+
+	if ((fp = fopen(PROC_NR_NEIGH_FILE, "r")) == NULL) {
+		if (logging)
+			syslog(LOG_ERR, "netromr: cannot open %s\n", PROC_NR_NEIGH_FILE);
+		close(s);
+		return;
+	}
+
+	fgets(neigh_buffer, 90, fp);
+	
+	portcall = ax25_ntoa(neighbour);
+
+	quality = port_list[index].default_qual;
+
+	while (fgets(neigh_buffer, 90, fp) != NULL) {
+		addr     = strtok(neigh_buffer, " ");
+		callsign = strtok(NULL, " ");
+		device   = strtok(NULL, " ");
+		qual     = atoi(strtok(NULL, " "));
+		lock     = atoi(strtok(NULL, " "));
+
+		if (strcmp(callsign, portcall) == 0 &&
+		    strcmp(device, port_list[index].device) == 0 &&
+		    lock == 1) {
+			quality = qual;
+			break;
+		}
+	}
+
+	fclose(fp);
+
+	nr_node.callsign    = *neighbour;
+	memcpy(nr_node.mnemonic, buffer, MNEMONIC_LEN);
+	nr_node.mnemonic[MNEMONIC_LEN] = '\0';
+
+	if ((p = strchr(nr_node.mnemonic, ' ')) != NULL)
+		*p = '\0';
+
+	if (!validmnemonic(nr_node.mnemonic)) {
+		if (debug && logging)
+			syslog(LOG_DEBUG, "rejecting route, invalid mnemonic - %s\n", nr_node.mnemonic);
+	} else {
+		nr_node.neighbour   = *neighbour;
+		strcpy(nr_node.device, port_list[index].device);
+		nr_node.quality     = quality;
+		nr_node.obs_count   = obs_count;
+
+		if (ioctl(s, SIOCADDRT, &nr_node) == -1) {
+			if (logging)
+				syslog(LOG_ERR, "netromr: SIOCADDRT: %m");
+			close(s);
+			return;
+		}
+	}
+
+	buffer += MNEMONIC_LEN;
+	length -= MNEMONIC_LEN;
+
+	while (length >= ROUTE_LEN) {
+		/*
+		 * Ensure that a) the route is not via me, and
+		 *             b) it is better than my minimum acceptable quality
+		 */
+		if (ax25_cmp(&my_call, (ax25_address *)(buffer + 13)) != 0 &&
+		    buffer[20] > port_list[index].worst_qual) {
+			memcpy(&nr_node.callsign, buffer + 0, CALLSIGN_LEN);
+			memcpy(nr_node.mnemonic,  buffer + 7, MNEMONIC_LEN);
+			nr_node.mnemonic[MNEMONIC_LEN] = '\0';
+
+			if ((p = strchr(nr_node.mnemonic, ' ')) != NULL)
+				*p = '\0';
+
+			if (!validmnemonic(nr_node.mnemonic)) {
+				if (debug && logging)
+					syslog(LOG_DEBUG, "rejecting route, invalid mnemonic - %s\n", nr_node.mnemonic);
+			} else {
+				nr_node.neighbour   = *neighbour;
+				strcpy(nr_node.device, port_list[index].device);
+				nr_node.quality     = ((quality * buffer[20]) + 128) / 256;
+				nr_node.obs_count   = obs_count;
+
+				if (ioctl(s, SIOCADDRT, &nr_node) == -1) {
+					if (logging)
+						syslog(LOG_ERR, "netromr: SIOCADDRT: %m");
+					close(s);
+					return;
+				}
+			}
+		}
+
+		buffer += ROUTE_LEN;
+		length -= ROUTE_LEN;
+	}
+
+	close(s);
+}