1 files changed, 131 insertions, 0 deletions
diff --git a/tests/findalldevstest.c b/tests/findalldevstest.c
new file mode 100644
index 0000000..ec7c950
--- /dev/null
+++ b/tests/findalldevstest.c
@@ -0,0 +1,131 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include <pcap.h>
+
+static void ifprint(pcap_if_t *d);
+static char *iptos(bpf_u_int32 in);
+
+int main(int argc, char **argv)
+{
+  pcap_if_t *alldevs;
+  pcap_if_t *d;
+  char *s;
+  bpf_u_int32 net, mask;
+  
+  char errbuf[PCAP_ERRBUF_SIZE+1];
+  if (pcap_findalldevs(&alldevs, errbuf) == -1)
+  {
+    fprintf(stderr,"Error in pcap_findalldevs: %s\n",errbuf);
+    exit(1);
+  }
+  for(d=alldevs;d;d=d->next)
+  {
+    ifprint(d);
+  }
+
+  if ( (s = pcap_lookupdev(errbuf)) == NULL)
+  {
+    fprintf(stderr,"Error in pcap_lookupdev: %s\n",errbuf);
+  }
+  else
+  {
+    printf("Preferred device name: %s\n",s);
+  }
+
+  if (pcap_lookupnet(s, &net, &mask, errbuf) < 0)
+  {
+    fprintf(stderr,"Error in pcap_lookupnet: %s\n",errbuf);
+  }
+  else
+  {
+    printf("Preferred device is on network: %s/%s\n",iptos(net), iptos(mask));
+  }
+  
+  exit(0);
+}
+
+static void ifprint(pcap_if_t *d)
+{
+  pcap_addr_t *a;
+#ifdef INET6
+  char ntop_buf[INET6_ADDRSTRLEN];
+#endif
+
+  printf("%s\n",d->name);
+  if (d->description)
+    printf("\tDescription: %s\n",d->description);
+  printf("\tLoopback: %s\n",(d->flags & PCAP_IF_LOOPBACK)?"yes":"no");
+
+  for(a=d->addresses;a;a=a->next) {
+    switch(a->addr->sa_family)
+    {
+      case AF_INET:
+        printf("\tAddress Family: AF_INET\n");
+        if (a->addr)
+          printf("\t\tAddress: %s\n",
+            inet_ntoa(((struct sockaddr_in *)(a->addr))->sin_addr));
+        if (a->netmask)
+          printf("\t\tNetmask: %s\n",
+            inet_ntoa(((struct sockaddr_in *)(a->netmask))->sin_addr));
+        if (a->broadaddr)
+          printf("\t\tBroadcast Address: %s\n",
+            inet_ntoa(((struct sockaddr_in *)(a->broadaddr))->sin_addr));
+        if (a->dstaddr)
+          printf("\t\tDestination Address: %s\n",
+            inet_ntoa(((struct sockaddr_in *)(a->dstaddr))->sin_addr));
+        break;
+#ifdef INET6
+      case AF_INET6:
+        printf("\tAddress Family: AF_INET6\n");
+        if (a->addr)
+          printf("\t\tAddress: %s\n",
+            inet_ntop(AF_INET6,
+               ((struct sockaddr_in6 *)(a->addr))->sin6_addr.s6_addr,
+               ntop_buf, sizeof ntop_buf));
+        if (a->netmask)
+          printf("\t\tNetmask: %s\n",
+            inet_ntop(AF_INET6,
+              ((struct sockaddr_in6 *)(a->netmask))->sin6_addr.s6_addr,
+               ntop_buf, sizeof ntop_buf));
+        if (a->broadaddr)
+          printf("\t\tBroadcast Address: %s\n",
+            inet_ntop(AF_INET6,
+              ((struct sockaddr_in6 *)(a->broadaddr))->sin6_addr.s6_addr,
+               ntop_buf, sizeof ntop_buf));
+        if (a->dstaddr)
+          printf("\t\tDestination Address: %s\n",
+            inet_ntop(AF_INET6,
+              ((struct sockaddr_in6 *)(a->dstaddr))->sin6_addr.s6_addr,
+               ntop_buf, sizeof ntop_buf));
+        break;
+#endif
+      default:
+        printf("\tAddress Family: Unknown (%d)\n", a->addr->sa_family);
+        break;
+    }
+  }
+  printf("\n");
+}
+
+/* From tcptraceroute */
+#define IPTOSBUFFERS	12
+static char *iptos(bpf_u_int32 in)
+{
+	static char output[IPTOSBUFFERS][3*4+3+1];
+	static short which;
+	u_char *p;
+
+	p = (u_char *)&in;
+	which = (which + 1 == IPTOSBUFFERS ? 0 : which + 1);
+	sprintf(output[which], "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
+	return output[which];
+}