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ctdb-common: Fix a bug in non-Linux (PCAP) TCP packet capturing

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Captured packets include a link-layer header, which is considered in
the Linux code but not the PCAP code.  Also, the actual captured
length is in caplen, not len.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This commit is contained in:
Martin Schwenke 2018-08-17 15:36:41 +10:00 committed by Amitay Isaacs
parent 0beb16f34e
commit f3a1f1e1fa
1 changed files with 1 additions and 1 deletions
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2
ctdb/common/system_socket.c
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@ -962,7 +962,7 @@ int ctdb_sys_read_tcp_packet(int s,
/* make sure its not a short packet */
if (offsetof(struct tcphdr, th_ack) + 4 +
(ip->ip_hl*4) > pkthdr.len) {
(ip->ip_hl*4) + sizeof(*eth) > pkthdr.caplen) {
return -1;
}
/* TCP */