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-rw-r--r--axconfig.c367
1 files changed, 113 insertions, 254 deletions
diff --git a/axconfig.c b/axconfig.c
index 4f64f9a..f6c3e3b 100644
--- a/axconfig.c
+++ b/axconfig.c
@@ -27,8 +27,6 @@
#include "pathnames.h"
#include "axconfig.h"
-#define _PATH_PROCNET_DEV "/proc/net/dev"
-
typedef struct _axport
{
struct _axport *Next;
@@ -44,24 +42,6 @@ typedef struct _axport
static AX_Port *ax25_ports = NULL;
static AX_Port *ax25_port_tail = NULL;
-typedef struct _axiface
-{
- struct _axiface *Next;
- char *Name;
- char *Call;
- char *Device;
-} AX_Iface;
-
-static AX_Iface *ax25_ifaces = NULL;
-
-static int ax25_hw_cmp(char *callsign, char *hw_addr)
-{
- ax25_address call;
-
- ax25_aton_entry(callsign, call.ax25_call);
-
- return ax25_cmp(&call, (ax25_address *)hw_addr) == 0;
-}
static AX_Port *ax25_port_ptr(char *name)
{
@@ -73,6 +53,8 @@ static AX_Port *ax25_port_ptr(char *name)
while (p != NULL) {
if (strcasecmp(p->Name, name) == 0)
return p;
+ if (strcasecmp(p->Call, name) == 0)
+ return p;
p = p->Next;
}
@@ -195,171 +177,12 @@ char *ax25_config_get_desc(char *name)
return p->Description;
}
-static void free_ax25_ports() {
- AX_Port *axp;
- for (axp = ax25_ports; axp; ) {
- AX_Port *q = axp->Next;
- if (axp->Name) free(axp->Name);
- if (axp->Call) free(axp->Call);
- if (axp->Device) free(axp->Device);
- if (axp->Description) free(axp->Description);
- free(axp);
- axp = q;
- }
- ax25_ports = ax25_port_tail = NULL;
-}
-
-static void free_ax25_ifaces() {
- AX_Iface *axif;
- for (axif = ax25_ifaces; axif; ) {
- AX_Iface *q = axif->Next;
- if (axif->Name) free(axif->Name);
- if (axif->Device) free(axif->Device);
- if (axif->Call) free(axif->Call);
- free(axif);
- axif = q;
- }
- ax25_ifaces = NULL;
-}
-
-static int test_and_add_ax25_iface(int fd, char *name, struct ifreq *ifr) {
- AX_Iface *axif;
-
- if (fd == -1)
- return 0;
- if (!name)
- return 0;
- if (!strcmp(name, "lo")) return 0;
- if (!ifr)
- return 0;
-
- strncpy(ifr->ifr_name, name, IFNAMSIZ-1);
- ifr->ifr_name[IFNAMSIZ-1] = 0;
-
- if (ioctl(fd, SIOCGIFFLAGS, ifr) < 0) {
- fprintf(stderr, "axconfig: SIOCGIFFLAGS: %s\n", strerror(errno));
- return -1;
- }
-
- if (!(ifr->ifr_flags & IFF_UP)) return 0;
-
- if (ioctl(fd, SIOCGIFHWADDR, ifr) < 0) {
- fprintf(stderr, "axconfig: SIOCGIFHWADDR: %s\n", strerror(errno));
- return -1;
- }
-
- if (ifr->ifr_hwaddr.sa_family != ARPHRD_AX25) return 0;
-
- if ((axif = (AX_Iface *)malloc(sizeof(AX_Iface))) == NULL) {
- fprintf(stderr, "axconfig: out of memory!\n");
- return -1;
- }
- if (!(axif->Name = strdup(name))) {
- fprintf(stderr, "axconfig: out of memory!\n");
- free(axif);
- return -1;
- }
- if (!(axif->Device = strdup(ifr->ifr_name))) {
- fprintf(stderr, "axconfig: out of memory!\n");
- free(axif->Name);
- free(axif);
- return -1;
- }
- if (!(axif->Call = strdup(ifr->ifr_hwaddr.sa_data))) {
- free(axif->Name);
- free(axif->Device);
- free(axif);
- fprintf(stderr, "axconfig: out of memory!\n");
- return -1;
- }
- axif->Next = ax25_ifaces;
- ax25_ifaces = axif;
-
- return 1;
-}
-
-#ifdef FIND_ALL_INTERFACES
-static char *proc_get_iface_name(char *line) {
- char *p;
-
- if (!(p = strchr(line, ':')))
- return 0;
- *p = 0;
- while (*line && isspace(*line & 0xff))
- line++;
- if (!*line)
- return 0;
- return line;
-}
-#endif
-
-static int get_ax25_ifaces(void) {
-#ifdef FIND_ALL_INTERFACES
- FILE *fp;
-#endif
- struct ifreq ifr;
- int fd = -1;
- int ret = -1;
-
- free_ax25_ifaces();
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- fprintf(stderr, "axconfig: unable to open socket (%s)\n", strerror(errno));
- goto out;
- }
-
-#ifdef FIND_ALL_INTERFACES /* will be default soon, after tracing a kernel error */
- if ((fp = fopen(_PATH_PROCNET_DEV, "r"))) {
- /* Because ifc.ifc_req does not show interfaces without
- * IP-Address assigned, we use the device list via /proc.
- * This concept was inspired by net-tools / ifconfig
- */
- char buf[512];
- int i = 0;
- ret = 0;
- while (fgets(buf, sizeof(buf), fp)) {
- /* skip proc header */
- if (i < 2) {
- i++;
- continue;
- }
- if (test_and_add_ax25_iface(fd, proc_get_iface_name(buf), &ifr) > 0)
- ret++;
- }
- fclose(fp);
- } else {
-#else
- {
-#endif
- struct ifconf ifc;
- struct ifreq *ifrp;
- char buffer[1024];
- int n = 0;
- ifc.ifc_len = sizeof(buffer);
- ifc.ifc_buf = buffer;
-
- if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
- fprintf(stderr, "axconfig: SIOCGIFCONF: %s\n", strerror(errno));
- goto out;
- }
- ret = 0;
-
- for (ifrp = ifc.ifc_req, n = ifc.ifc_len / sizeof(struct ifreq); --n >= 0; ifrp++)
- if (test_and_add_ax25_iface(fd, ifrp->ifr_name, &ifr) > 0)
- ret++;
- }
-
-out:
- if (fd != -1)
- close(fd);
- return ret;
-}
-
-static int ax25_config_init_port(int lineno, char *line)
+static int ax25_config_init_port(int fd, int lineno, char *line, const char **ifcalls, const char **ifdevs)
{
AX_Port *p;
- AX_Iface *axif = NULL;
- char *name, *call, *baud, *paclen, *window, *desc, *dev = NULL;
- int found = 0;
+ char *name, *call, *baud, *paclen, *window, *desc;
+ const char *dev = NULL;
+ int found;
name = strtok(line, " \t");
call = strtok(NULL, " \t");
@@ -371,93 +194,66 @@ static int ax25_config_init_port(int lineno, char *line)
if (name == NULL || call == NULL || baud == NULL ||
paclen == NULL || window == NULL || desc == NULL) {
fprintf(stderr, "axconfig: unable to parse line %d of axports file\n", lineno);
- return -1;
+ return FALSE;
}
for (p = ax25_ports; p != NULL; p = p->Next) {
if (strcasecmp(name, p->Name) == 0) {
fprintf(stderr, "axconfig: duplicate port name %s in line %d of axports file\n", name, lineno);
- return -1;
+ return FALSE;
}
- /* dl9sau: why? */
if (strcasecmp(call, p->Call) == 0) {
fprintf(stderr, "axconfig: duplicate callsign %s in line %d of axports file\n", call, lineno);
- return -1;
+ return FALSE;
}
}
if (atoi(baud) < 0) {
fprintf(stderr, "axconfig: invalid baud rate setting %s in line %d of axports file\n", baud, lineno);
- return -1;
+ return FALSE;
}
if (atoi(paclen) <= 0) {
fprintf(stderr, "axconfig: invalid packet size setting %s in line %d of axports file\n", paclen, lineno);
- return -1;
+ return FALSE;
}
if (atoi(window) <= 0) {
fprintf(stderr, "axconfig: invalid window size setting %s in line %d of axports file\n", window, lineno);
- return -1;
+ return FALSE;
}
strupr(call);
- for (axif = ax25_ifaces; axif; axif = axif->Next) {
- if (ax25_hw_cmp(call, axif->Call)) {
- /* associate list of ifaces with the name from axports we just found */
- if (!strcmp(axif->Name, name)) {
- free(axif->Name);
- if (!(axif->Name = strdup(name))) {
- fprintf(stderr, "axconfig: out of memory!\n");
- return -1;
- }
- }
- dev = axif->Device;
- found = 1;
- break;
- }
+ found = 0;
+ for (;ifcalls && *ifcalls; ++ifcalls, ++ifdevs) {
+ if (strcmp(call,*ifcalls) == 0) {
+ found = 1;
+ dev = *ifdevs;
+ break;
+ }
}
+
if (!found) {
- fprintf(stderr, "axconfig: port %s not active\n", name);
- return -1;
+#if 0 /* None of your business to complain about some port being down... */
+ fprintf(stderr, "axconfig: port with call '%s' is not active\n", call);
+#endif
+ return FALSE;
}
if ((p = (AX_Port *)malloc(sizeof(AX_Port))) == NULL) {
fprintf(stderr, "axconfig: out of memory!\n");
- return -1;
+ return FALSE;
}
- if (!(p->Name = strdup(name))) {
- fprintf(stderr, "axconfig: out of memory!\n");
- free(p);
- return -1;
- }
- if (!(p->Call = strdup(call))) {
- fprintf(stderr, "axconfig: out of memory!\n");
- free(p->Name);
- free(p);
- return -1;
- }
- if (!(p->Device = strdup(dev))) {
- fprintf(stderr, "axconfig: out of memory!\n");
- free(p->Name);
- free(p->Call);
- free(p);
- return -1;
- }
- if (!(p->Description = strdup(desc))) {
- fprintf(stderr, "axconfig: out of memory!\n");
- free(p->Name);
- free(p->Call);
- free(p->Description);
- free(p);
- return -1;
- }
+ p->Name = strdup(name);
+ p->Call = strdup(call);
+ p->Device = strdup(dev);
p->Baud = atoi(baud);
p->Window = atoi(window);
p->Paclen = atoi(paclen);
+ p->Description = strdup(desc);
if (ax25_ports == NULL)
ax25_ports = p;
@@ -468,44 +264,107 @@ static int ax25_config_init_port(int lineno, char *line)
p->Next = NULL;
- return 0;
+ return TRUE;
}
int ax25_config_load_ports(void)
{
- FILE *fp;
+ FILE *fp = NULL;
char buffer[256], *s;
- int lineno = 1;
- int n = 0;
+ int fd = -1, lineno = 1, n = 0, i;
+ const char **calllist = NULL;
+ const char **devlist = NULL;
+ int callcount = 0;
+ struct ifreq ifr;
+
+ /* Reliable listing of all network ports on Linux
+ is only available via reading /proc/net/dev ... */
+
+
+ if ((fd = socket(PF_FILE, SOCK_DGRAM, 0)) < 0) {
+ fprintf(stderr, "axconfig: unable to open socket (%s)\n", strerror(errno));
+ goto cleanup;
+ }
- /* in case of a "reload" */
- free_ax25_ports();
+ if ((fp = fopen("/proc/net/dev", "r"))) {
+ /* Two header lines.. */
+ s = fgets(buffer, sizeof(buffer), fp);
+ s = fgets(buffer, sizeof(buffer), fp);
+ /* .. then network interface names */
+ while (!feof(fp)) {
+ if (!fgets(buffer, sizeof(buffer), fp))
+ break;
+ s = strchr(buffer, ':');
+ if (s) *s = 0;
+ s = buffer;
+ while (*s == ' ') ++s;
+
+ memset(&ifr, 0, sizeof(ifr));
+ strcpy(ifr.ifr_name, s);
+
+ if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0) {
+ fprintf(stderr, "axconfig: SIOCGIFHWADDR: %s\n", strerror(errno));
+ return FALSE;
+ }
+
+ if (ifr.ifr_hwaddr.sa_family != ARPHRD_AX25)
+ continue;
+
+ /* store found interface callsigns */
+ /* ax25_ntoa() returns pointer to static buffer */
+ s = ax25_ntoa((void*)ifr.ifr_hwaddr.sa_data);
+
+ if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
+ fprintf(stderr, "axconfig: SIOCGIFFLAGS: %s\n", strerror(errno));
+ return FALSE;
+ }
+
+ if (!(ifr.ifr_flags & IFF_UP))
+ continue;
+
+
+ calllist = realloc(calllist, sizeof(char *) * (callcount+2));
+ devlist = realloc(devlist, sizeof(char *) * (callcount+2));
+ calllist[callcount] = strdup(s);
+ devlist [callcount] = strdup(ifr.ifr_name);
+ ++callcount;
+ calllist[callcount] = NULL;
+ devlist [callcount] = NULL;
+ }
+ fclose(fp);
+ fp = NULL;
+ }
- if (get_ax25_ifaces() <= 0)
- goto out;
if ((fp = fopen(CONF_AXPORTS_FILE, "r")) == NULL) {
- fprintf(stderr, "axconfig: unable to open axports file %s (%s)\n", CONF_AXPORTS_FILE, strerror(errno));
- goto out;
+ fprintf(stderr, "axconfig: unable to open axports file %s (%s)\n", CONF_AXPORTS_FILE, strerror(errno));
+ goto cleanup;
}
- while (fgets(buffer, 255, fp) != NULL) {
- if ((s = strchr(buffer, '\n')) != NULL)
- *s = '\0';
+ while (fp && fgets(buffer, 255, fp)) {
+ if ((s = strchr(buffer, '\n')))
+ *s = '\0';
- if (strlen(buffer) > 0 && *buffer != '#')
- if (!ax25_config_init_port(lineno, buffer))
- n++;
+ if (strlen(buffer) > 0 && *buffer != '#')
+ if (ax25_config_init_port(fd, lineno, buffer, calllist, devlist))
+ n++;
- lineno++;
+ lineno++;
}
- fclose(fp);
+ cleanup:;
+ if (fd >= 0) close(fd);
+ if (fp) fclose(fp);
+
+ for(i = 0; calllist && calllist[i]; ++i) {
+ free((void*)calllist[i]);
+ free((void*)devlist[i]);
+ }
+ if (calllist) free(calllist);
+ if (devlist) free(devlist);
if (ax25_ports == NULL)
- n = 0;
+ return 0;
-out:
- free_ax25_ifaces();
return n;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-03 04:38:39 +0000