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Fix async connect on Windows #1073

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merged 3 commits into from
Jun 26, 2022
Merged

Fix async connect on Windows #1073

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5e002bc
Support failed async connects on windows.
kristjanvalur Mar 26, 2021
94c1985
Use correct type for getsockopt()
kristjanvalur Apr 8, 2021
f246ee4
Whitespace, style
michael-grunder Jun 26, 2022
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20 changes: 18 additions & 2 deletions net.c
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Original file line number Diff line number Diff line change
Expand Up @@ -277,12 +277,28 @@ int redisCheckConnectDone(redisContext *c, int *completed) {
*completed = 1;
return REDIS_OK;
}
switch (errno) {
int error = errno;
if (error == EINPROGRESS) {
/* must check error to see if connect failed. Get the socket error */
int fail, so_error;
socklen_t optlen = sizeof(so_error);
fail = getsockopt(c->fd, SOL_SOCKET, SO_ERROR, &so_error, &optlen);
if (fail == 0) {
if (so_error == 0) {
/* Socket is connected! */
*completed = 1;
return REDIS_OK;
}
/* connection error; */
errno = so_error;
error = so_error;
}
}
switch (error) {
case EISCONN:
*completed = 1;
return REDIS_OK;
case EALREADY:
case EINPROGRESS:
case EWOULDBLOCK:
*completed = 0;
return REDIS_OK;
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19 changes: 17 additions & 2 deletions sockcompat.c
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Original file line number Diff line number Diff line change
Expand Up @@ -180,10 +180,17 @@ int win32_connect(SOCKET sockfd, const struct sockaddr *addr, socklen_t addrlen)

/* For Winsock connect(), the WSAEWOULDBLOCK error means the same thing as
* EINPROGRESS for POSIX connect(), so we do that translation to keep POSIX
* logic consistent. */
if (errno == EWOULDBLOCK) {
* logic consistent.
* Additionally, WSAALREADY is can be reported as WSAEINVAL to and this is
* translated to EIO. Convert appropriately
*/
int err = errno;
if (err == EWOULDBLOCK) {
errno = EINPROGRESS;
}
else if (err == EIO) {
errno = EALREADY;
}

return ret != SOCKET_ERROR ? ret : -1;
}
Expand All @@ -205,6 +212,14 @@ int win32_getsockopt(SOCKET sockfd, int level, int optname, void *optval, sockle
} else {
ret = getsockopt(sockfd, level, optname, (char*)optval, optlen);
}
if (ret != SOCKET_ERROR && level == SOL_SOCKET && optname == SO_ERROR) {
/* translate SO_ERROR codes, if non-zero */
int err = *(int*)optval;
if (err != 0) {
err = _wsaErrorToErrno(err);
*(int*)optval = err;
}
}
_updateErrno(ret != SOCKET_ERROR);
return ret != SOCKET_ERROR ? ret : -1;
}
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