add samples and IPX service configuration

samples/rip.c

@@ -0,0 +1,84 @@
+#include "samples.h"
+
+struct rip_data
+{
+	uint32_t rip_net;
+	uint16_t rip_hops;
+	uint16_t rip_ticks;
+} __attribute__ ((packed));
+
+int main(int argc, char **argv)
+{
+	struct sockaddr_ipx sipx;
+	int result;
+	int s;
+	char msg[1024];
+	char *bptr;
+	struct rip_data *rp;
+
+	(void)argc;
+	(void)argv;
+
+	s = socket(AF_IPX, SOCK_DGRAM, AF_IPX);
+	if (s < 0)
+	{
+		perror("IPX: socket: ");
+		exit(-1);
+	}
+
+	sipx.sipx_family = AF_IPX;
+	sipx.sipx_network = 0;
+	sipx.sipx_port = htons(0x453);
+	sipx.sipx_type = 17;
+
+	result = bind(s, (struct sockaddr *) &sipx, sizeof(sipx));
+	if (result < 0)
+	{
+		perror("IPX: bind: ");
+		exit(-1);
+	}
+
+	while (1)
+	{
+		socklen_t len;
+		size_t rclen;
+
+		len = sizeof(sipx);
+		result = recvfrom(s, msg, sizeof(msg), 0,
+				  (struct sockaddr *) &sipx, &len);
+		if (result < 0)
+		{
+			perror("IPX: recvfrom");
+			exit(-1);
+		}
+
+		if (result < 2)
+		{
+			fprintf(stderr,
+				"Received packet is too short to be RIP packet (%d bytes)\n",
+				result);
+			continue;
+		}
+
+		rclen = (size_t)result - 2;
+		bptr = msg;
+
+		printf("RIP packet from: %08X:%02X%02X%02X%02X%02X%02X\n",
+		       (uint32_t)ntohl(sipx.sipx_network),
+		       sipx.sipx_node[0], sipx.sipx_node[1],
+		       sipx.sipx_node[2], sipx.sipx_node[3],
+		       sipx.sipx_node[4], sipx.sipx_node[5]);
+
+		bptr += 2;
+		rp = (struct rip_data *) bptr;
+
+		while (rclen >= sizeof(struct rip_data))
+		{
+			printf("\tNET: %08X HOPS: %d\n",
+			       (uint32_t)ntohl(rp->rip_net),
+			       ntohs(rp->rip_hops));
+			rclen -= sizeof(struct rip_data);
+			rp++;
+		}
+	}
+}