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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <syslog.h>
#include <config.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#ifdef __GLIBC__
#include <net/ethernet.h>
#else
#include <linux/if_ether.h>
#endif
#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 "../pathnames.h"
#include "netromd.h"
extern int compliant;
static int validcallsign(ax25_address *a)
{
char c;
int n, end = 0;
for (n = 0; n < 6; n++) {
c = (a->ax25_call[n] >> 1) & 0x7F;
if (!end && (isupper(c) || isdigit(c)))
continue;
if (c == ' ') {
end = 1;
continue;
}
return FALSE;
}
return TRUE;
}
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;
}
static int add_node(int s, unsigned char *buffer, struct nr_route_struct *nr_node, int quality, int index)
{
ax25_address best_neighbour;
int best_quality;
char *p;
memcpy(&nr_node->callsign, buffer + 0, CALLSIGN_LEN);
memcpy(nr_node->mnemonic, buffer + 7, MNEMONIC_LEN);
memcpy(&best_neighbour, buffer + 13, CALLSIGN_LEN);
best_quality = buffer[20];
nr_node->mnemonic[MNEMONIC_LEN] = '\0';
if ((p = strchr(nr_node->mnemonic, ' ')) != NULL)
*p = '\0';
if (!validcallsign(&nr_node->callsign)) {
if (debug && logging)
syslog(LOG_DEBUG, "netromr: add_node: invalid node callsign - %s", ax25_ntoa(&nr_node->callsign));
return -1;
}
if (!validmnemonic(nr_node->mnemonic)) {
if (debug && logging)
syslog(LOG_DEBUG, "netromr: add_node: invalid mnemonic - %s", nr_node->mnemonic);
return -1;
}
if (!validcallsign(&best_neighbour)) {
if (debug && logging)
syslog(LOG_DEBUG, "netromr: add_node: invalid best neighbour callsign - %s", &best_neighbour);
return -1;
}
if (ax25_cmp(&my_call, &best_neighbour) == 0) {
if (debug && logging)
syslog(LOG_DEBUG, "netromr: add_node: route to me");
return FALSE;
}
if (best_quality < port_list[index].worst_qual) {
if (debug && logging)
syslog(LOG_DEBUG, "netromr: add_node: quality less than worst_qual");
return FALSE;
}
nr_node->quality = ((quality * best_quality) + 128) / 256;
/* log this only when logging verbosely */
if (debug > 1 && logging) {
syslog(LOG_DEBUG, "Node update: %s:%s",
ax25_ntoa(&nr_node->callsign), nr_node->mnemonic);
syslog(LOG_DEBUG, "Neighbour: %s device: %s",
ax25_ntoa(&nr_node->neighbour), nr_node->device);
syslog(LOG_DEBUG, "Quality: %d obs: %d ndigis: %d",
nr_node->quality, nr_node->obs_count, nr_node->ndigis);
}
if (ioctl(s, SIOCADDRT, nr_node) == -1) {
if (logging)
syslog(LOG_ERR, "netromr: SIOCADDRT: %m");
return -1;
}
return TRUE;
}
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;
if (!validcallsign(neighbour)) {
if (debug && logging)
syslog(LOG_DEBUG, "rejecting frame, invalid neighbour callsign - %s\n", ax25_ntoa(neighbour));
return;
}
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) {
nr_node.neighbour = *neighbour;
strcpy(nr_node.device, port_list[index].device);
nr_node.obs_count = obs_count;
if (add_node(s, buffer, &nr_node, quality, index) == -1) {
close(s);
return;
}
buffer += ROUTE_LEN;
length -= ROUTE_LEN;
}
close(s);
}
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