char *do_select(SOCKET skt, int startup) { int events; if (startup) sftp_ssh_socket = skt; else sftp_ssh_socket = INVALID_SOCKET; if (p_WSAEventSelect) { if (startup) { events = (FD_CONNECT | FD_READ | FD_WRITE | FD_OOB | FD_CLOSE | FD_ACCEPT); netevent = CreateEvent(NULL, FALSE, FALSE, NULL); } else { events = 0; } if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) { switch (p_WSAGetLastError()) { case WSAENETDOWN: return "Network is down"; default: return "WSAEventSelect(): unknown error"; } } } return NULL; }
char *do_select(SOCKET skt, int startup) { int events; if (startup) { events = (FD_CONNECT | FD_READ | FD_WRITE | FD_OOB | FD_CLOSE | FD_ACCEPT); } else { events = 0; } if (p_WSAEventSelect(skt, netevent, events) == SOCKET_ERROR) { switch (p_WSAGetLastError()) { case WSAENETDOWN: return "Network is down"; default: return "WSAEventSelect(): unknown error"; } } return NULL; }
SockAddr *sk_namelookup(const char *host, char **canonicalname, int address_family) { SockAddr *ret = snew(SockAddr); unsigned long a; char realhost[8192]; int hint_family; /* Default to IPv4. */ hint_family = (address_family == ADDRTYPE_IPV4 ? AF_INET : #ifndef NO_IPV6 address_family == ADDRTYPE_IPV6 ? AF_INET6 : #endif AF_UNSPEC); /* Clear the structure and default to IPv4. */ memset(ret, 0, sizeof(SockAddr)); #ifndef NO_IPV6 ret->ais = NULL; #endif ret->namedpipe = false; ret->addresses = NULL; ret->resolved = false; ret->refcount = 1; *realhost = '\0'; if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) { struct hostent *h = NULL; int err = 0; #ifndef NO_IPV6 /* * Use getaddrinfo when it's available */ if (p_getaddrinfo) { struct addrinfo hints; memset(&hints, 0, sizeof(hints)); hints.ai_family = hint_family; hints.ai_flags = AI_CANONNAME; { /* strip [] on IPv6 address literals */ char *trimmed_host = host_strduptrim(host); err = p_getaddrinfo(trimmed_host, NULL, &hints, &ret->ais); sfree(trimmed_host); } if (err == 0) ret->resolved = true; } else #endif { /* * Otherwise use the IPv4-only gethostbyname... * (NOTE: we don't use gethostbyname as a fallback!) */ if ( (h = p_gethostbyname(host)) ) ret->resolved = true; else err = p_WSAGetLastError(); } if (!ret->resolved) { ret->error = (err == WSAENETDOWN ? "Network is down" : err == WSAHOST_NOT_FOUND ? "Host does not exist" : err == WSATRY_AGAIN ? "Host not found" : #ifndef NO_IPV6 p_getaddrinfo&&p_gai_strerror ? p_gai_strerror(err) : #endif "gethostbyname: unknown error"); } else { ret->error = NULL; #ifndef NO_IPV6 /* If we got an address info use that... */ if (ret->ais) { /* Are we in IPv4 fallback mode? */ /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */ if (ret->ais->ai_family == AF_INET) memcpy(&a, (char *) &((SOCKADDR_IN *) ret->ais-> ai_addr)->sin_addr, sizeof(a)); if (ret->ais->ai_canonname) strncpy(realhost, ret->ais->ai_canonname, lenof(realhost)); else strncpy(realhost, host, lenof(realhost)); } /* We used the IPv4-only gethostbyname()... */ else #endif { int n; for (n = 0; h->h_addr_list[n]; n++); ret->addresses = snewn(n, unsigned long); ret->naddresses = n; for (n = 0; n < ret->naddresses; n++) { memcpy(&a, h->h_addr_list[n], sizeof(a)); ret->addresses[n] = p_ntohl(a); } memcpy(&a, h->h_addr, sizeof(a)); /* This way we are always sure the h->h_name is valid :) */ strncpy(realhost, h->h_name, sizeof(realhost)); } } } else {