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Fix a bug in the TCP tracerouting which resulted in not accepting any

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incoming packets. So all packets seemed to be lost.

MFC after: 1 week
This commit is contained in:
Michael Tuexen 2012-04-26 13:45:17 +00:00
parent faf6e9484f
commit 7a7a6331a9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=234701
1 changed files with 3 additions and 4 deletions
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7
contrib/traceroute/traceroute.c
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@ -1406,8 +1406,7 @@ tcp_prep(struct outdata *outdata)
tcp->th_sport = htons(ident);
tcp->th_dport = htons(port + (fixedPort ? 0 : outdata->seq));
tcp->th_seq = (tcp->th_sport << 16) | (tcp->th_dport +
(fixedPort ? outdata->seq : 0));
tcp->th_seq = (tcp->th_sport << 16) | tcp->th_dport;
tcp->th_ack = 0;
tcp->th_off = 5;
tcp->th_flags = TH_SYN;
@ -1425,8 +1424,8 @@ tcp_check(const u_char *data, int seq)
struct tcphdr *const tcp = (struct tcphdr *) data;
return (ntohs(tcp->th_sport) == ident
&& ntohs(tcp->th_dport) == port + (fixedPort ? 0 : seq))
&& tcp->th_seq == (((tcp_seq)ident << 16) | (port + seq));
&& ntohs(tcp->th_dport) == port + (fixedPort ? 0 : seq)
&& tcp->th_seq == (tcp_seq)((tcp->th_sport << 16) | tcp->th_dport));
}
void