1 files changed, 307 insertions, 0 deletions
diff --git a/nrconfig.c b/nrconfig.c
new file mode 100644
index 0000000..ddcd538
--- /dev/null
+++ b/nrconfig.c
@@ -0,0 +1,307 @@
+#define _LINUX_STRING_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <netax25/ax25.h>
+#include <netrose/rose.h>
+
+#include "pathnames.h"
+#include "axlib.h"
+#include "nrconfig.h"
+
+typedef struct _nrport
+{
+	struct _nrport *Next;
+	char *Name;
+	char *Call;
+	char *Alias;
+	char *Device;
+	int  Paclen;
+	char *Description;
+} NR_Port;
+
+static NR_Port *nr_ports       = NULL;
+static NR_Port *nr_port_tail   = NULL;
+
+static int ax25_hw_cmp(unsigned char *callsign, unsigned char *hw_addr)
+{
+	ax25_address call;
+
+	convert_call_entry(callsign, call.ax25_call);
+	
+	return ax25cmp(&call, (ax25_address *)hw_addr) == 0;
+}
+
+static NR_Port *nr_port_ptr(char *name)
+{
+	NR_Port *p = nr_ports;
+
+	if (name == NULL)
+		return p;
+
+	while (p != NULL) {
+		if (strcasecmp(name, p->Name) == 0)
+			return p;
+
+		p = p->Next;
+	}
+
+	return NULL;
+}
+
+char *nr_config_get_next(char *name)
+{
+	NR_Port *p;
+	
+	if (nr_ports == NULL)
+		return NULL;
+		
+	if (name == NULL)
+		return nr_ports->Name;
+		
+	if ((p = nr_port_ptr(name)) == NULL)
+		return NULL;
+		
+	p = p->Next;
+
+	if (p == NULL)
+		return NULL;
+		
+	return p->Name;
+}
+
+char *nr_config_get_name(char *device)
+{
+	NR_Port *p = nr_ports;
+
+	while (p != NULL) {
+		if (strcmp(device, p->Device) == 0)
+			return p->Name;
+
+		p = p->Next;
+	}
+
+	return NULL;
+}
+
+char *nr_config_get_addr(char *name)
+{
+	NR_Port *p = nr_port_ptr(name);
+
+	if (p == NULL)
+		return NULL;
+
+	return p->Call;
+}
+
+char *nr_config_get_dev(char *name)
+{
+	NR_Port *p = nr_port_ptr(name);
+
+	if (p == NULL)
+		return NULL;
+
+	return p->Device;
+}
+
+char *nr_config_get_port(ax25_address *callsign)
+{
+	NR_Port *p = nr_ports;
+	ax25_address addr;
+
+	while (p != NULL) {
+		convert_call_entry(p->Call, (char *)&addr);
+	
+		if (ax25cmp(callsign, &addr) == 0)
+			return p->Name;
+
+		p = p->Next;
+	}
+
+	return NULL;
+}
+
+char *nr_config_get_alias(char *name)
+{
+	NR_Port *p = nr_port_ptr(name);
+
+	if (p == NULL)
+		return NULL;
+
+	return p->Alias;
+}
+
+int nr_config_get_paclen(char *name)
+{
+	NR_Port *p = nr_port_ptr(name);
+
+	if (p == NULL)
+		return 0;
+
+	return p->Paclen;
+}
+
+char *nr_config_get_desc(char *name)
+{
+	NR_Port *p = nr_port_ptr(name);
+
+	if (p == NULL)
+		return NULL;
+
+	return p->Description;
+}
+
+static int nr_config_init_port(int fd, int lineno, char *line)
+{
+	NR_Port *p;
+	char buffer[1024];
+	char *name, *call, *alias, *paclen, *desc, *dev = NULL;
+	struct ifconf ifc;
+	struct ifreq *ifrp;
+	struct ifreq ifr;
+	int n, found = 0;
+	
+	name   = strtok(line, " \t");
+	call   = strtok(NULL, " \t");
+	alias  = strtok(NULL, " \t");
+	paclen = strtok(NULL, " \t");
+	desc   = strtok(NULL, "");
+
+	if (name == NULL || call == NULL || alias == NULL || paclen == NULL ||
+	    desc == NULL) {
+		fprintf(stderr, "nrconfig: unable to parse line %d of config file\n", lineno);
+		return FALSE;
+	}
+
+	for (p = nr_ports; p != NULL; p = p->Next) {
+		if (strcasecmp(name, p->Name) == 0) {
+			fprintf(stderr, "nrconfig: duplicate port name in line %d of config file\n", lineno);
+			return FALSE;
+		}
+		if (strcasecmp(call, p->Call) == 0) {
+			fprintf(stderr, "nrconfig: duplicate callsign in line %d of config file\n", lineno);
+			return FALSE;
+		}
+		if (strcasecmp(alias, p->Alias) == 0) {
+			fprintf(stderr, "nrconfig: duplicate alias in line %d of config file\n", lineno);
+			return FALSE;
+		}
+	}
+
+	if (atoi(paclen) <= 0) {
+		fprintf(stderr, "nrconfig: invalid packet size in line %d of config file\n", lineno);
+		return FALSE;
+	}
+
+	strupr(call);
+	strupr(alias);
+
+	ifc.ifc_len = sizeof(buffer);
+	ifc.ifc_buf = buffer;
+	
+	if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
+		fprintf(stderr, "nrconfig: SIOCGIFCONF: %s\n", strerror(errno));
+		return FALSE;
+	}
+
+	for (ifrp = ifc.ifc_req, n = ifc.ifc_len / sizeof(struct ifreq); --n >= 0; ifrp++) {
+		strcpy(ifr.ifr_name, ifrp->ifr_name);
+
+		if (strcmp(ifr.ifr_name, "lo") == 0) continue;
+
+		if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
+			fprintf(stderr, "nrconfig: SIOCGIFFLAGS: %s\n", strerror(errno));
+			return FALSE;
+		}
+
+		if (!(ifr.ifr_flags & IFF_UP)) continue;
+
+		if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0) {
+			fprintf(stderr, "nrconfig: SIOCGIFHWADDR: %s\n", strerror(errno));
+			return FALSE;
+		}
+
+		if (ifr.ifr_hwaddr.sa_family != ARPHRD_NETROM) continue;
+
+		if (ax25_hw_cmp(call, ifr.ifr_hwaddr.sa_data)) {
+			dev = ifr.ifr_name;
+			found = 1;
+			break;
+		}
+	}
+
+	if (!found) {
+		fprintf(stderr, "nrconfig: port %s not active\n", name);
+		return FALSE;
+	}
+
+	if ((p = (NR_Port *)malloc(sizeof(NR_Port))) == NULL) {
+		fprintf(stderr, "nrconfig: out of memory!\n");
+		return FALSE;
+	}
+
+	p->Name        = strdup(name);
+	p->Call        = strdup(call);
+	p->Alias       = strdup(alias);
+	p->Device      = strdup(dev);
+	p->Paclen      = atoi(paclen);
+	p->Description = strdup(desc);
+
+	if (nr_ports == NULL)
+		nr_ports = p;
+	else
+		nr_port_tail->Next = p;
+
+	nr_port_tail = p;
+
+	p->Next = NULL;
+	
+	return TRUE;
+}
+
+int nr_config_load_ports(void)
+{
+	FILE *fp;
+	char buffer[256], *s;
+	int fd, lineno = 1, n = 0;
+
+	if ((fp = fopen(CONF_NRPORTS_FILE, "r")) == NULL) {
+		fprintf(stderr, "nrconfig: unable to open nrports file\n");
+		return 0;
+	}
+
+	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+		fprintf(stderr, "nrconfig: unable to open socket\n");
+		fclose(fp);
+		return 0;
+	}
+
+	while (fgets(buffer, 255, fp) != NULL) {
+		if ((s = strchr(buffer, '\n')) != NULL)
+			*s = '\0';
+
+		if (strlen(buffer) > 0 && buffer[0] != '#')
+			if (nr_config_init_port(fd, lineno, buffer))
+				n++;
+
+		lineno++;
+	}
+
+	fclose(fp);
+	close(fd);
+
+	if (nr_ports == NULL)
+		return 0;
+
+	return n;
+}