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Don't exit mbedtls_net_poll on interruption of select

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If the select UNIX system call is interrupted by a signal handler,
it is not automatically restarted but returns EINTR. This commit
modifies the use of select in mbedtls_net_poll from net_sockets.c
to retry the select call in this case.
This commit is contained in:
Hanno Becker 2018-03-15 12:19:31 +00:00
parent adfa64f0c4
commit 9ac640326b
1 changed files with 5 additions and 2 deletions
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3
library/net_sockets.c
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@ -470,8 +470,11 @@ int mbedtls_net_poll( mbedtls_net_context *ctx, uint32_t rw, uint32_t timeout )
tv.tv_sec = timeout / 1000; tv.tv_sec = timeout / 1000;
tv.tv_usec = ( timeout % 1000 ) * 1000; tv.tv_usec = ( timeout % 1000 ) * 1000;
do
{
ret = select( fd + 1, &read_fds, &write_fds, NULL, ret = select( fd + 1, &read_fds, &write_fds, NULL,
timeout == (uint32_t) -1 ? NULL : &tv ); timeout == (uint32_t) -1 ? NULL : &tv );
} while( ret == EINTR );
if( ret < 0 ) if( ret < 0 )
return( MBEDTLS_ERR_NET_POLL_FAILED ); return( MBEDTLS_ERR_NET_POLL_FAILED );