#include "samples.h"

struct sap_data
{
	uint16_t sap_type;
	char sap_name[48];
	uint32_t sap_net;
	unsigned char sap_node[6];
	uint16_t sap_sock;
	uint16_t sap_hops;
} __attribute__ ((packed));

int main(int argc, char **argv)
{
	struct sockaddr_ipx sipx;
	int result;
	int s;
	char msg[1024];
	char *bptr;
	struct sap_data *sp;

	(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(0x452);
	sipx.sipx_type = 0x4;

	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 SAP packet (%d bytes)\n",
				result);
			continue;
		}

		rclen = (size_t)result - 2;
		bptr = msg;

		printf("SAP 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;
		sp = (struct sap_data *) bptr;

		while (rclen >= sizeof(struct sap_data))
		{
			int i;

			/* Keep output readable if the SAP name is blank-padded. */
			sp->sap_name[47] = '\0';
			for (i = 46; i > 0 && sp->sap_name[i] == '_'; i--)
				;
			sp->sap_name[i + 1] = '\0';

			printf("NAME: %s TYPE: %x HOPS: %x\n",
			       sp->sap_name,
			       ntohs(sp->sap_type),
			       ntohs(sp->sap_hops));

			printf("\tADDR: %08X:%02X%02X%02X%02X%02X%02X:%04X\n",
			       (uint32_t)ntohl(sp->sap_net),
			       sp->sap_node[0], sp->sap_node[1],
			       sp->sap_node[2], sp->sap_node[3],
			       sp->sap_node[4], sp->sap_node[5],
			       ntohs(sp->sap_sock));

			rclen -= sizeof(struct sap_data);
			sp++;
		}
	}
}