71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
#include "samples.h"
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struct rip_data
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{
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u_int32_t rip_net __attribute__((packed));
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u_int16_t rip_hops __attribute__((packed));
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u_int16_t rip_ticks __attribute__((packed));
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} __attribute__((packed));
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int
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main(int argc, char **argv)
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{
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struct sockaddr_ipx sipx;
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int result;
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int s;
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char msg[1024];
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char *bptr;
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struct rip_data *rp;
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s = socket(AF_IPX, SOCK_DGRAM, AF_IPX);
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if (s < 0)
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{
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perror("IPX: socket: ");
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exit(-1);
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}
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sipx.sipx_family = AF_IPX;
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sipx.sipx_network = 0;
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sipx.sipx_port = htons(0x453);
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sipx.sipx_type = 17;
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result = bind(s, (struct sockaddr *) &sipx, sizeof(sipx));
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if (result < 0)
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{
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perror("IPX: bind: ");
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exit(-1);
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}
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while (1)
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{
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socklen_t len;
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size_t rclen;
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len = sizeof(sipx);
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result = recvfrom(s, msg, sizeof(msg), 0,
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(struct sockaddr *) &sipx, &len);
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if (result < 0)
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{
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perror("IPX: recvfrom");
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exit(-1);
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}
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if (result < 2) {
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fprintf(stderr, "Received packet is too short to be RIP packet (%d bytes)\n", result);
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continue;
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}
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rclen = result - 2;
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bptr = msg;
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printf("RIP packet from: %08X:%02X%02X%02X%02X%02X%02X\n",
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(u_int32_t)htonl(sipx.sipx_network),
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sipx.sipx_node[0], sipx.sipx_node[1],
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sipx.sipx_node[2], sipx.sipx_node[3],
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sipx.sipx_node[6], sipx.sipx_node[5]);
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bptr += 2;
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rp = (struct rip_data *) bptr;
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while (rclen >= sizeof(struct rip_data))
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{
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printf("\tNET: %08X HOPS: %d\n", (u_int32_t)ntohl(rp->rip_net),
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ntohs(rp->rip_hops));
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rclen -= sizeof(struct rip_data);
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rp++;
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}
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}
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}
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