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Enable support for MSG_DONTWAIT in lwip_recvmsg()

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Enables support for MSG_DONTWAIT in lwip_recvmsg(). Support already
exists in lwip_recv_tcp() and lwip_recvfrom_udp_raw(); these are both
accessible from lwip_recvfrom(), which already supports MSG_DONTWAIT.

Signed-off-by: Nate Karstens <nate.karstens@garmin.com>
Signed-off-by: Joel Cunningham <joel.cunningham@me.com>
This commit is contained in:
Nate Karstens 2017-10-18 10:23:48 -05:00 committed by Joel Cunningham
parent f41b5b84b1
commit 1960937df3
1 changed files with 2 additions and 3 deletions
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5
src/api/sockets.c
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@ -1212,7 +1212,7 @@ lwip_recvmsg(int s, struct msghdr *message, int flags)
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvmsg(%d, message=%p, flags=0x%x)\n", s, (void *)message, flags)); LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvmsg(%d, message=%p, flags=0x%x)\n", s, (void *)message, flags));
LWIP_ERROR("lwip_recvmsg: invalid message pointer", message != NULL, return ERR_ARG;); LWIP_ERROR("lwip_recvmsg: invalid message pointer", message != NULL, return ERR_ARG;);
LWIP_ERROR("lwip_recvmsg: unsupported flags", ((flags == 0) || (flags == MSG_PEEK)), LWIP_ERROR("lwip_recvmsg: unsupported flags", (flags & ~(MSG_PEEK|MSG_DONTWAIT)) == 0,
set_errno(EOPNOTSUPP); return -1;); set_errno(EOPNOTSUPP); return -1;);
if ((message->msg_iovlen <= 0) || (message->msg_iovlen > IOV_MAX)) { if ((message->msg_iovlen <= 0) || (message->msg_iovlen > IOV_MAX)) {
@ -1260,8 +1260,7 @@ lwip_recvmsg(int s, struct msghdr *message, int flags)
} }
break; break;
} }
/* while MSG_DONTWAIT is not supported for this function, we pass it to /* pass MSG_DONTWAIT to lwip_recv_tcp() to prevent waiting for more data */
lwip_recv_tcp() to prevent waiting for more data */
recv_flags |= MSG_DONTWAIT; recv_flags |= MSG_DONTWAIT;
} }
if (buflen > 0) { if (buflen > 0) {