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https://github.com/torvalds/linux
27 March 2024, 02:37:15 UTC
Revision 2c8d85182348021fc0a1bed193a4be4161dc8364 authored by Erik Hugne on 28 August 2013, 07:29:58 UTC, committed by David S. Miller on 30 August 2013, 20:06:57 UTC 
tipc: set sk_err correctly when connection fails
 
Should a connect fail, if the publication/server is unavailable or
due to some other error, a positive value will be returned and errno
is never set. If the application code checks for an explicit zero
return from connect (success) or a negative return (failure), it
will not catch the error and subsequent send() calls will fail as
shown from the strace snippet below.

socket(0x1e /* PF_??? */, SOCK_SEQPACKET, 0) = 3
connect(3, {sa_family=0x1e /* AF_??? */, sa_data="\2\1\322\4\0\0\322\4\0\0\0\0\0\0"}, 16) = 111
sendto(3, "test", 4, 0, NULL, 0)        = -1 EPIPE (Broken pipe)

The reason for this behaviour is that TIPC wrongly inverts error
codes set in sk_err.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent eb8895d
History
Tip revision: 2c8d85182348021fc0a1bed193a4be4161dc8364 authored by Erik Hugne on 28 August 2013, 07:29:58 UTC
tipc: set sk_err correctly when connection fails
Tip revision: 2c8d851
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