63 lines
2.2 KiB
Plaintext
63 lines
2.2 KiB
Plaintext
$OpenBSD: patch-despoof_c,v 1.3 2005/03/15 01:37:06 mjc Exp $
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--- despoof.c.orig Tue Jul 25 07:51:24 2000
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+++ despoof.c Mon Mar 14 10:51:17 2005
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@@ -34,7 +34,7 @@ struct bpf_program pcapfilter;
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struct in_addr net, mask;
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pcap_t *pd;
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char pcap_err[PCAP_ERRBUF_SIZE];
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-u_char *ebuf;
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+u_char ebuf[LIBNET_ERRBUF_SIZE];
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char *dev;
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struct libnet_link_int *l;
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int num_of_questions, link_offset, verbose, target_answers, unexpected, inquery;
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@@ -150,7 +150,7 @@ void grab_packet(u_char *data1, struct p
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if (targetaddr == ip->ip_src.s_addr)
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{
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- if (((inquery == 1) && (icmp->icmp_type == ICMP_ECHOREPLY)) || ((inquery == 2) && (icmp->icmp_type == ICMP_TIMESTAMPREPLY)) || ((inquery == 3) && (sport == ntohs(tcphdr->th_dport))))
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+ if (((inquery == 1) && (icmp->icmp_type == ICMP_ECHOREPLY)) || ((inquery == 2) && (icmp->icmp_type == ICMP_TSTAMPREPLY)) || ((inquery == 3) && (sport == ntohs(tcphdr->th_dport))))
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{
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if (ttlval == ip->ip_ttl)
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{
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@@ -285,7 +285,7 @@ void usage(char *prog)
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fprintf(stderr," -a set ACK flag on TCP packets\n");
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fprintf(stderr," -h this help screen\n");
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fprintf(stderr," -v verbose\n");
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- fprintf(stderr," -d device to grab local IP or sniff from, default is eth0\n");
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+ fprintf(stderr," -d device to grab local IP or sniff from\n");
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fprintf(stderr," -l local port to bind to, default is 80\n");
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fprintf(stderr," -p target port to send to, default is 80\n");
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fprintf(stderr," -i inquery packet type to send/receive, types include the following:\n");
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@@ -306,12 +306,12 @@ int main(int argc, char **argv)
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extern int optind;
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extern int optopt;
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extern int opterr;
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- char ch;
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+ int ch;
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int spoof = 0, setdev = 0, timeout = 10, ttl = 0;
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u_long dst_ip = 0;
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pid_t pid;
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- dev = "eth0"; /* default */
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+ dev = NULL;
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verbose = 0;
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prog = argv[0];
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sport = 80;
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@@ -408,6 +408,16 @@ int main(int argc, char **argv)
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fprintf(stderr, "=== and spoof your source IP address at the same time.\n");
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usage(prog);
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exit(-1);
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+ }
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+
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+ if (dev == NULL)
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+ {
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+ dev = pcap_lookupdev(pcap_err);
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+ if (dev == NULL)
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+ {
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+ fprintf(stderr, "=== No devices found.\n");
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+ exit(-1);
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+ }
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}
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if(!spoof)
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