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Update FREERTOS + LWIP support

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Alex Alashkin authored and Alex Alashkin committed 2021-08-12 13:54:43 +03:00
1 parent 104c4fab19
commit 453d4be4d0
6 files changed
+58 -20
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src/sock.c
+15 -8
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@@ -118,6 +118,8 @@ static void mg_set_non_blocking_mode(SOCKET fd) {
const BaseType_t off = 0;
setsockopt(fd, 0, FREERTOS_SO_RCVTIMEO, &off, sizeof(off));
setsockopt(fd, 0, FREERTOS_SO_SNDTIMEO, &off, sizeof(off));
#elif MG_ARCH == MG_ARCH_FREERTOS_LWIP
lwip_fcntl(fd, F_SETFL, O_NONBLOCK);
#else
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK, FD_CLOEXEC);
#endif
@@ -135,16 +137,21 @@ SOCKET mg_open_listener(const char *url, struct mg_addr *addr) {
int on = 1, af = addr->is_ip6 ? AF_INET6 : AF_INET;
int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM;
int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP;
(void)on;
if ((fd = socket(af, type, proto)) != INVALID_SOCKET &&
#if !defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE)
// SO_RESUSEADDR is not enabled on Windows because the semantics of
// SO_REUSEADDR on UNIX and Windows is different. On Windows,
// SO_REUSEADDR allows to bind a socket to a port without error even if
// the port is already open by another program. This is not the behavior
// SO_REUSEADDR was designed for, and leads to hard-to-track failure
// scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless
// SO_EXCLUSIVEADDRUSE is supported and set on a socket.
#if (!defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE)) \
&& (!defined(LWIP_SOCKET) || (defined(LWIP_SOCKET) && SO_REUSE == 1))
// 1. SO_RESUSEADDR is not enabled on Windows because the semantics of
// SO_REUSEADDR on UNIX and Windows is different. On Windows,
// SO_REUSEADDR allows to bind a socket to a port without error even if
// the port is already open by another program. This is not the behavior
// SO_REUSEADDR was designed for, and leads to hard-to-track failure
// scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless
// SO_EXCLUSIVEADDRUSE is supported and set on a socket.
// 2. In case of LWIP, SO_REUSEADDR should be explicitly enabled, by defining
// SO_REUSE (in lwipopts.h), otherwise the code below will compile
// but won't work! (setsockopt will return EINVAL)
!setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) &&
#endif
#if defined(_WIN32) && defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE)