diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/connect.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/connect.c b/lib/connect.c index b277d912e..e2350482c 100644 --- a/lib/connect.c +++ b/lib/connect.c @@ -852,13 +852,35 @@ static void nosigpipe(struct connectdata *conn, Work-around: Make the Socket Send Buffer Size Larger Than the Program Send Buffer Size + The problem described in this knowledge-base is applied only to pre-Vista + Windows. Following function trying to detect OS version and skips + SO_SNDBUF adjustment for Windows Vista and above. */ +#define DETECT_OS_NONE 0 +#define DETECT_OS_PREVISTA 1 +#define DETECT_OS_VISTA_OR_LATER 2 + void Curl_sndbufset(curl_socket_t sockfd) { int val = CURL_MAX_WRITE_SIZE + 32; int curval = 0; int curlen = sizeof(curval); + OSVERSIONINFO osver; + static int detectOsState = DETECT_OS_NONE; + + if(detectOsState == DETECT_OS_NONE) { + memset(&osver, 0, sizeof(osver)); + osver.dwOSVersionInfoSize = sizeof(osver); + detectOsState = DETECT_OS_PREVISTA; + if(GetVersionEx(&osver)) { + if(osver.dwMajorVersion >= 6) + detectOsState = DETECT_OS_VISTA_OR_LATER; + } + } + if(detectOsState == DETECT_OS_VISTA_OR_LATER) + return; + if(getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char *)&curval, &curlen) == 0) if(curval > val) return; |