diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/gtls.c | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/lib/gtls.c b/lib/gtls.c index 84410eda8..93bb91de6 100644 --- a/lib/gtls.c +++ b/lib/gtls.c @@ -85,15 +85,52 @@ static bool gtls_inited = FALSE; * We use custom functions rather than the GNU TLS defaults because it allows * us to get specific about the fourth "flags" argument, and to use arbitrary * private data with gnutls_transport_set_ptr if we wish. + * + * On Windows translate WSAGetLastError() to errno values as GNU TLS does it + * internally too. This is necessary because send() and recv() on Windows + * don't set errno when they fail but GNU TLS expects a proper errno value. + * + * Use gnutls_transport_set_global_errno() like the GNU TLS documentation + * suggests to avoid problems with different errno variables when GNU TLS and + * curl are linked to different versions of msvcrt.dll. */ +#ifdef USE_WINSOCK +static void translate_wsa_to_errno(void) +{ + switch(WSAGetLastError()) { + case WSAEWOULDBLOCK: + gnutls_transport_set_global_errno(EAGAIN); + break; + case WSAEINTR: + gnutls_transport_set_global_errno(EINTR); + break; + default: + gnutls_transport_set_global_errno(EIO); + break; + } +} +#endif + static ssize_t Curl_gtls_push(void *s, const void *buf, size_t len) { - return swrite(GNUTLS_POINTER_TO_INT_CAST(s), buf, len); + ssize_t ret = swrite(GNUTLS_POINTER_TO_INT_CAST(s), buf, len); +#ifdef USE_WINSOCK + if(ret < 0) { + translate_wsa_to_errno(); + } +#endif + return ret; } static ssize_t Curl_gtls_pull(void *s, void *buf, size_t len) { - return sread(GNUTLS_POINTER_TO_INT_CAST(s), buf, len); + ssize_t ret = sread(GNUTLS_POINTER_TO_INT_CAST(s), buf, len); +#ifdef USE_WINSOCK + if(ret < 0) { + translate_wsa_to_errno(); + } +#endif + return ret; } /* Curl_gtls_init() |