"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "src/protocols/ec_tcp.c" between
ettercap-0.8.3.tar.gz and ettercap-0.8.3.1.tar.gz

About: ettercap is a multipurpose sniffer/interceptor/logger for switched LAN.

ec_tcp.c  (ettercap-0.8.3)	:	ec_tcp.c  (ettercap-0.8.3.1)
skipping to change at line 176		skipping to change at line 176
* don't have valid checksums as presented to the machine's packet-capt ure		* don't have valid checksums as presented to the machine's packet-capt ure
* mechanism, as those packets are wrapped around internally rather		* mechanism, as those packets are wrapped around internally rather
* than being captured after passing through the network interface, as		* than being captured after passing through the network interface, as
* the OS doesn't bother computing the checksum and adding it to the pa cket		* the OS doesn't bother computing the checksum and adding it to the pa cket
* it leaves that up to the network interface.		* it leaves that up to the network interface.
* (taken from a bug report by Guy Harris - libpcap engi neer)		* (taken from a bug report by Guy Harris - libpcap engi neer)
*		*
* For Windows at least, TCP checksum off-loading can be disabled with a		* For Windows at least, TCP checksum off-loading can be disabled with a
* registry setting.		* registry setting.
*		*
* Same for Linux, but sometimes even ethtool doesnt turn this feature off.		* Same for Linux, but sometimes even ethtool doesn't turn this feature off.
*		*
* if the source is the ettercap host, don't display the message		* if the source is the ettercap host, don't display the message
*/		*/
if (ip_addr_is_ours(&PACKET->L3.src) == E_FOUND)		if (ip_addr_is_ours(&PACKET->L3.src) == E_FOUND)
return NULL;		return NULL;
#endif		#endif
if (EC_GBL_CONF->checksum_warning)		if (EC_GBL_CONF->checksum_warning)
USER_MSG("Invalid TCP packet from %s:%d : csum [%#x] should be (%#x) \n", ip_addr_ntoa(&PACKET->L3.src, tmp),		USER_MSG("Invalid TCP packet from %s:%d : csum [%#x] should be (%#x) \n", ip_addr_ntoa(&PACKET->L3.src, tmp),
ntohs(tcp->sport), ntohs(tcp->csum), checksu m_shouldbe(tcp->csum, sum));		ntohs(tcp->sport), ntohs(tcp->csum), checksu m_shouldbe(tcp->csum, sum));
return NULL;		return NULL;
End of changes. 1 change blocks.
1 lines changed or deleted		1 lines changed or added

---