+\f
+/* Wget expects network calls such as connect, recv, send, etc., to set
+ errno on failure. To achieve that, Winsock calls are wrapped with code
+ that, in case of error, sets errno to the value of WSAGetLastError().
+ In addition, we provide a wrapper around strerror, which recognizes
+ Winsock errors and prints the appropriate error message. */
+
+/* Define a macro that creates a function definition that wraps FUN into
+ a function that sets errno the way the rest of the code expects. */
+
+#define WRAP(fun, decl, call) int wrapped_##fun decl { \
+ int retval = fun call; \
+ if (retval < 0) \
+ errno = WSAGetLastError (); \
+ return retval; \
+}
+
+WRAP (socket, (int domain, int type, int protocol), (domain, type, protocol))
+WRAP (bind, (int s, struct sockaddr *a, int alen), (s, a, alen))
+WRAP (connect, (int s, const struct sockaddr *a, int alen), (s, a, alen))
+WRAP (listen, (int s, int backlog), (s, backlog))
+WRAP (accept, (int s, struct sockaddr *a, int *alen), (s, a, alen))
+WRAP (recv, (int s, void *buf, int len, int flags), (s, buf, len, flags))
+WRAP (send, (int s, const void *buf, int len, int flags), (s, buf, len, flags))
+WRAP (select, (int n, fd_set *r, fd_set *w, fd_set *e, const struct timeval *tm),
+ (n, r, w, e, tm))
+WRAP (getsockname, (int s, struct sockaddr *n, int *nlen), (s, n, nlen))
+WRAP (getpeername, (int s, struct sockaddr *n, int *nlen), (s, n, nlen))
+WRAP (setsockopt, (int s, int level, int opt, const void *val, int len),
+ (s, level, opt, val, len))
+WRAP (closesocket, (int s), (s))
+
+/* Return the text of the error message for Winsock error WSERR. */
+
+static const char *
+get_winsock_error (int wserr)
+{
+ switch (wserr) {
+ case WSAEINTR: return "Interrupted system call";
+ case WSAEBADF: return "Bad file number";
+ case WSAEACCES: return "Permission denied";
+ case WSAEFAULT: return "Bad address";
+ case WSAEINVAL: return "Invalid argument";
+ case WSAEMFILE: return "Too many open files";
+ case WSAEWOULDBLOCK: return "Resource temporarily unavailable";
+ case WSAEINPROGRESS: return "Operation now in progress";
+ case WSAEALREADY: return "Operation already in progress";
+ case WSAENOTSOCK: return "Socket operation on nonsocket";
+ case WSAEDESTADDRREQ: return "Destination address required";
+ case WSAEMSGSIZE: return "Message too long";
+ case WSAEPROTOTYPE: return "Protocol wrong type for socket";
+ case WSAENOPROTOOPT: return "Bad protocol option";
+ case WSAEPROTONOSUPPORT: return "Protocol not supported";
+ case WSAESOCKTNOSUPPORT: return "Socket type not supported";
+ case WSAEOPNOTSUPP: return "Operation not supported";
+ case WSAEPFNOSUPPORT: return "Protocol family not supported";
+ case WSAEAFNOSUPPORT: return "Address family not supported by protocol family";
+ case WSAEADDRINUSE: return "Address already in use";
+ case WSAEADDRNOTAVAIL: return "Cannot assign requested address";
+ case WSAENETDOWN: return "Network is down";
+ case WSAENETUNREACH: return "Network is unreachable";
+ case WSAENETRESET: return "Network dropped connection on reset";
+ case WSAECONNABORTED: return "Software caused connection abort";
+ case WSAECONNRESET: return "Connection reset by peer";
+ case WSAENOBUFS: return "No buffer space available";
+ case WSAEISCONN: return "Socket is already connected";
+ case WSAENOTCONN: return "Socket is not connected";
+ case WSAESHUTDOWN: return "Cannot send after socket shutdown";
+ case WSAETOOMANYREFS: return "Too many references";
+ case WSAETIMEDOUT: return "Connection timed out";
+ case WSAECONNREFUSED: return "Connection refused";
+ case WSAELOOP: return "Too many levels of symbolic links";
+ case WSAENAMETOOLONG: return "File name too long";
+ case WSAEHOSTDOWN: return "Host is down";
+ case WSAEHOSTUNREACH: return "No route to host";
+ case WSAENOTEMPTY: return "Not empty";
+ case WSAEPROCLIM: return "Too many processes";
+ case WSAEUSERS: return "Too many users";
+ case WSAEDQUOT: return "Bad quota";
+ case WSAESTALE: return "Something is stale";
+ case WSAEREMOTE: return "Remote error";
+ case WSAEDISCON: return "Disconnected";
+
+ /* Extended Winsock errors */
+ case WSASYSNOTREADY: return "Winsock library is not ready";
+ case WSANOTINITIALISED: return "Winsock library not initalised";
+ case WSAVERNOTSUPPORTED: return "Winsock version not supported";
+
+ case WSAHOST_NOT_FOUND: return "Host not found";
+ case WSATRY_AGAIN: return "Host not found, try again";
+ case WSANO_RECOVERY: return "Unrecoverable error in call to nameserver";
+ case WSANO_DATA: return "No data record of requested type";
+
+ default:
+ return NULL;
+ }
+}
+
+/* Return the error message corresponding to ERR. This is different
+ from Windows libc strerror() in that it handles Winsock errors
+ correctly. */
+
+const char *
+windows_strerror (int err)
+{
+ const char *p;
+ if (err >= 0 && err < sys_nerr)
+ return strerror (err);
+ else if ((p = get_winsock_error (err)) != NULL)
+ return p;
+ else
+ {
+ static char buf[32];
+ snprintf (buf, sizeof (buf), "Unknown error %d (%#x)", err, err);
+ return buf;
+ }
+}
+\f
+#ifdef ENABLE_IPV6
+/* An inet_ntop implementation that uses WSAAddressToString.
+ Prototype complies with POSIX 1003.1-2004. This is only used under
+ IPv6 because Wget prints IPv4 addresses using inet_ntoa. */
+
+const char *
+inet_ntop (int af, const void *src, char *dst, socklen_t cnt)
+{
+ /* struct sockaddr can't accomodate struct sockaddr_in6. */
+ union {
+ struct sockaddr_in6 sin6;
+ struct sockaddr_in sin;
+ } sa;
+ DWORD dstlen = cnt;
+ size_t srcsize;
+
+ xzero (sa);
+ switch (af)
+ {
+ case AF_INET:
+ sa.sin.sin_family = AF_INET;
+ sa.sin.sin_addr = *(struct in_addr *) src;
+ srcsize = sizeof (sa.sin);
+ break;
+ case AF_INET6:
+ sa.sin6.sin6_family = AF_INET6;
+ sa.sin6.sin6_addr = *(struct in6_addr *) src;
+ srcsize = sizeof (sa.sin6);
+ break;
+ default:
+ abort ();
+ }
+
+ if (WSAAddressToString ((struct sockaddr *) &sa, srcsize, NULL, dst, &dstlen) != 0)
+ {
+ errno = WSAGetLastError();
+ return NULL;
+ }
+ return (const char *) dst;
+}
+#endif