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Add errno support to if_indextoname()

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This commit adds support in if_indextoname() to return ENXIO when
no interface is found.  This conforms to the Open Group/RFC 3493
specification

In order to leverage errno set support, the set_errno macro from
sockets.c was moved to sockets_priv.h
This commit is contained in:
Joel Cunningham
2017-02-09 22:32:29 -06:00
parent 852993029d
commit 3a7e03aaff
3 changed files with 16 additions and 16 deletions
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8
src/include/lwip/priv/sockets_priv.h
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@@ -48,6 +48,14 @@
extern "C" {
#endif
#if LWIP_SOCKET_SET_ERRNO
#ifndef set_errno
#define set_errno(err) do { if (err) { errno = (err); } } while(0)
#endif
#else /* LWIP_SOCKET_SET_ERRNO */
#define set_errno(err)
#endif /* LWIP_SOCKET_SET_ERRNO */
#if !LWIP_TCPIP_CORE_LOCKING
/** Maximum optlen used by setsockopt/getsockopt */
#define LWIP_SETGETSOCKOPT_MAXOPTLEN 16