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Apply improved WinSock error handling to the few situations it still

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hadn't been applied to.

[originally from svn r827]
This commit is contained in:
Simon Tatham 2000-12-18 09:20:26 +00:00
parent 7a580aa4d8
commit d3f120884c
1 changed files with 45 additions and 55 deletions
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100
winnet.c
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@ -56,6 +56,47 @@ void sk_init(void) {
sktree = newtree234(cmpfortree); sktree = newtree234(cmpfortree);
} }
char *winsock_error_string(int error) {
switch (error) {
case WSAEACCES: return "Network error: Permission denied";
case WSAEADDRINUSE: return "Network error: Address already in use";
case WSAEADDRNOTAVAIL: return "Network error: Cannot assign requested address";
case WSAEAFNOSUPPORT: return "Network error: Address family not supported by protocol family";
case WSAEALREADY: return "Network error: Operation already in progress";
case WSAECONNABORTED: return "Network error: Software caused connection abort";
case WSAECONNREFUSED: return "Network error: Connection refused";
case WSAECONNRESET: return "Network error: Connection reset by peer";
case WSAEDESTADDRREQ: return "Network error: Destination address required";
case WSAEFAULT: return "Network error: Bad address";
case WSAEHOSTDOWN: return "Network error: Host is down";
case WSAEHOSTUNREACH: return "Network error: No route to host";
case WSAEINPROGRESS: return "Network error: Operation now in progress";
case WSAEINTR: return "Network error: Interrupted function call";
case WSAEINVAL: return "Network error: Invalid argument";
case WSAEISCONN: return "Network error: Socket is already connected";
case WSAEMFILE: return "Network error: Too many open files";
case WSAEMSGSIZE: return "Network error: Message too long";
case WSAENETDOWN: return "Network error: Network is down";
case WSAENETRESET: return "Network error: Network dropped connection on reset";
case WSAENETUNREACH: return "Network error: Network is unreachable";
case WSAENOBUFS: return "Network error: No buffer space available";
case WSAENOPROTOOPT: return "Network error: Bad protocol option";
case WSAENOTCONN: return "Network error: Socket is not connected";
case WSAENOTSOCK: return "Network error: Socket operation on non-socket";
case WSAEOPNOTSUPP: return "Network error: Operation not supported";
case WSAEPFNOSUPPORT: return "Network error: Protocol family not supported";
case WSAEPROCLIM: return "Network error: Too many processes";
case WSAEPROTONOSUPPORT: return "Network error: Protocol not supported";
case WSAEPROTOTYPE: return "Network error: Protocol wrong type for socket";
case WSAESHUTDOWN: return "Network error: Cannot send after socket shutdown";
case WSAESOCKTNOSUPPORT: return "Network error: Socket type not supported";
case WSAETIMEDOUT: return "Network error: Connection timed out";
case WSAEWOULDBLOCK: return "Network error: Resource temporarily unavailable";
case WSAEDISCON: return "Network error: Graceful shutdown in progress";
default: return "Unknown network error";
}
}
SockAddr sk_namelookup(char *host, char **canonicalname) { SockAddr sk_namelookup(char *host, char **canonicalname) {
SockAddr ret = smalloc(sizeof(struct SockAddr_tag)); SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
unsigned long a; unsigned long a;
@ -65,10 +106,7 @@ SockAddr sk_namelookup(char *host, char **canonicalname) {
if ( (a = inet_addr(host)) == (unsigned long) INADDR_NONE) { if ( (a = inet_addr(host)) == (unsigned long) INADDR_NONE) {
if ( (h = gethostbyname(host)) == NULL) { if ( (h = gethostbyname(host)) == NULL) {
DWORD err = WSAGetLastError(); DWORD err = WSAGetLastError();
ret->error = (err == WSAENETDOWN ? "Network is down" : ret->error = winsock_error_string(err);
err == WSAHOST_NOT_FOUND ? "Host does not exist" :
err == WSATRY_AGAIN ? "Host not found" :
"gethostbyname: unknown error");
} else { } else {
memcpy (&a, h->h_addr, sizeof(a)); memcpy (&a, h->h_addr, sizeof(a));
*canonicalname = h->h_name; *canonicalname = h->h_name;
@ -112,9 +150,7 @@ Socket sk_new(SockAddr addr, int port, sk_receiver_t receiver) {
if (s == INVALID_SOCKET) { if (s == INVALID_SOCKET) {
err = WSAGetLastError(); err = WSAGetLastError();
ret->error = (err == WSAENETDOWN ? "Network is down" : ret->error = winsock_error_string(err);
err == WSAEAFNOSUPPORT ? "TCP/IP support not present" :
"socket(): unknown error");
return ret; return ret;
} }
@ -126,8 +162,7 @@ Socket sk_new(SockAddr addr, int port, sk_receiver_t receiver) {
a.sin_port = htons(0); a.sin_port = htons(0);
if (bind (s, (struct sockaddr *)&a, sizeof(a)) == SOCKET_ERROR) { if (bind (s, (struct sockaddr *)&a, sizeof(a)) == SOCKET_ERROR) {
err = WSAGetLastError(); err = WSAGetLastError();
ret->error = (err == WSAENETDOWN ? "Network is down" : ret->error = winsock_error_string(err);
"bind(): unknown error");
return ret; return ret;
} }
@ -138,11 +173,7 @@ Socket sk_new(SockAddr addr, int port, sk_receiver_t receiver) {
a.sin_port = htons((short)port); a.sin_port = htons((short)port);
if (connect (s, (struct sockaddr *)&a, sizeof(a)) == SOCKET_ERROR) { if (connect (s, (struct sockaddr *)&a, sizeof(a)) == SOCKET_ERROR) {
err = WSAGetLastError(); err = WSAGetLastError();
ret->error = (err == WSAENETDOWN ? "Network is down" : ret->error = winsock_error_string(err);
err == WSAECONNREFUSED ? "Connection refused" :
err == WSAENETUNREACH ? "Network is unreachable" :
err == WSAEHOSTUNREACH ? "No route to host" :
"connect(): unknown error");
return ret; return ret;
} }
@ -166,47 +197,6 @@ void sk_close(Socket s) {
sfree(s); sfree(s);
} }
char *winsock_error_string(int error) {
switch (error) {
case WSAEACCES: return "Network error: Permission denied";
case WSAEADDRINUSE: return "Network error: Address already in use";
case WSAEADDRNOTAVAIL: return "Network error: Cannot assign requested address";
case WSAEAFNOSUPPORT: return "Network error: Address family not supported by protocol family";
case WSAEALREADY: return "Network error: Operation already in progress";
case WSAECONNABORTED: return "Network error: Software caused connection abort";
case WSAECONNREFUSED: return "Network error: Connection refused";
case WSAECONNRESET: return "Network error: Connection reset by peer";
case WSAEDESTADDRREQ: return "Network error: Destination address required";
case WSAEFAULT: return "Network error: Bad address";
case WSAEHOSTDOWN: return "Network error: Host is down";
case WSAEHOSTUNREACH: return "Network error: No route to host";
case WSAEINPROGRESS: return "Network error: Operation now in progress";
case WSAEINTR: return "Network error: Interrupted function call";
case WSAEINVAL: return "Network error: Invalid argument";
case WSAEISCONN: return "Network error: Socket is already connected";
case WSAEMFILE: return "Network error: Too many open files";
case WSAEMSGSIZE: return "Network error: Message too long";
case WSAENETDOWN: return "Network error: Network is down";
case WSAENETRESET: return "Network error: Network dropped connection on reset";
case WSAENETUNREACH: return "Network error: Network is unreachable";
case WSAENOBUFS: return "Network error: No buffer space available";
case WSAENOPROTOOPT: return "Network error: Bad protocol option";
case WSAENOTCONN: return "Network error: Socket is not connected";
case WSAENOTSOCK: return "Network error: Socket operation on non-socket";
case WSAEOPNOTSUPP: return "Network error: Operation not supported";
case WSAEPFNOSUPPORT: return "Network error: Protocol family not supported";
case WSAEPROCLIM: return "Network error: Too many processes";
case WSAEPROTONOSUPPORT: return "Network error: Protocol not supported";
case WSAEPROTOTYPE: return "Network error: Protocol wrong type for socket";
case WSAESHUTDOWN: return "Network error: Cannot send after socket shutdown";
case WSAESOCKTNOSUPPORT: return "Network error: Socket type not supported";
case WSAETIMEDOUT: return "Network error: Connection timed out";
case WSAEWOULDBLOCK: return "Network error: Resource temporarily unavailable";
case WSAEDISCON: return "Network error: Graceful shutdown in progress";
default: return "Unknown network error";
}
}
/* /*
* The function which tries to send on a socket once it's deemed * The function which tries to send on a socket once it's deemed
* writable. * writable.