/* * Windows networking abstraction. * * For the IPv6 code in here I am indebted to Jeroen Massar and * unfix.org. */ #include /* need to put this first, for winelib builds */ #include #include #include #define NEED_DECLARATION_OF_SELECT /* in order to initialise it */ #include "putty.h" #include "network.h" #include "tree234.h" #include "ssh.h" #include #ifndef NO_IPV6 #ifdef __clang__ #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wmissing-braces" #endif const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; #ifdef __clang__ #pragma clang diagnostic pop #endif #endif #define ipv4_is_loopback(addr) \ ((p_ntohl(addr.s_addr) & 0xFF000000L) == 0x7F000000L) /* * Mutable state that goes with a SockAddr: stores information * about where in the list of candidate IP(v*) addresses we've * currently got to. */ typedef struct SockAddrStep_tag SockAddrStep; struct SockAddrStep_tag { #ifndef NO_IPV6 struct addrinfo *ai; /* steps along addr->ais */ #endif int curraddr; }; typedef struct NetSocket NetSocket; struct NetSocket { const char *error; SOCKET s; Plug *plug; bufchain output_data; bool connected; bool writable; bool frozen; /* this causes readability notifications to be ignored */ bool frozen_readable; /* this means we missed at least one readability * notification while we were frozen */ bool localhost_only; /* for listening sockets */ char oobdata[1]; size_t sending_oob; bool oobinline, nodelay, keepalive, privport; enum { EOF_NO, EOF_PENDING, EOF_SENT } outgoingeof; SockAddr *addr; SockAddrStep step; int port; int pending_error; /* in case send() returns error */ /* * We sometimes need pairs of Socket structures to be linked: * if we are listening on the same IPv6 and v4 port, for * example. So here we define `parent' and `child' pointers to * track this link. */ NetSocket *parent, *child; Socket sock; }; struct SockAddr { int refcount; char *error; bool resolved; bool namedpipe; /* indicates that this SockAddr is phony, holding a Windows * named pipe pathname instead of a network address */ #ifndef NO_IPV6 struct addrinfo *ais; /* Addresses IPv6 style. */ #endif unsigned long *addresses; /* Addresses IPv4 style. */ int naddresses; char hostname[512]; /* Store an unresolved host name. */ }; /* * Which address family this address belongs to. AF_INET for IPv4; * AF_INET6 for IPv6; AF_UNSPEC indicates that name resolution has * not been done and a simple host name is held in this SockAddr * structure. */ #ifndef NO_IPV6 #define SOCKADDR_FAMILY(addr, step) \ (!(addr)->resolved ? AF_UNSPEC : \ (step).ai ? (step).ai->ai_family : AF_INET) #else #define SOCKADDR_FAMILY(addr, step) \ (!(addr)->resolved ? AF_UNSPEC : AF_INET) #endif /* * Start a SockAddrStep structure to step through multiple * addresses. */ #ifndef NO_IPV6 #define START_STEP(addr, step) \ ((step).ai = (addr)->ais, (step).curraddr = 0) #else #define START_STEP(addr, step) \ ((step).curraddr = 0) #endif static tree234 *sktree; static int cmpfortree(void *av, void *bv) { NetSocket *a = (NetSocket *)av, *b = (NetSocket *)bv; uintptr_t as = (uintptr_t) a->s, bs = (uintptr_t) b->s; if (as < bs) return -1; if (as > bs) return +1; if (a < b) return -1; if (a > b) return +1; return 0; } static int cmpforsearch(void *av, void *bv) { NetSocket *b = (NetSocket *)bv; uintptr_t as = (uintptr_t) av, bs = (uintptr_t) b->s; if (as < bs) return -1; if (as > bs) return +1; return 0; } DECL_WINDOWS_FUNCTION(static, int, WSAStartup, (WORD, LPWSADATA)); DECL_WINDOWS_FUNCTION(static, int, WSACleanup, (void)); DECL_WINDOWS_FUNCTION(static, int, closesocket, (SOCKET)); DECL_WINDOWS_FUNCTION(static, u_long, ntohl, (u_long)); DECL_WINDOWS_FUNCTION(static, u_long, htonl, (u_long)); DECL_WINDOWS_FUNCTION(static, u_short, htons, (u_short)); DECL_WINDOWS_FUNCTION(static, u_short, ntohs, (u_short)); DECL_WINDOWS_FUNCTION(static, int, gethostname, (char *, int)); DECL_WINDOWS_FUNCTION(static, struct hostent FAR *, gethostbyname, (const char FAR *)); DECL_WINDOWS_FUNCTION(static, struct servent FAR *, getservbyname, (const char FAR *, const char FAR *)); DECL_WINDOWS_FUNCTION(static, unsigned long, inet_addr, (const char FAR *)); DECL_WINDOWS_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr)); DECL_WINDOWS_FUNCTION(static, const char FAR *, inet_ntop, (int, void FAR *, char *, size_t)); DECL_WINDOWS_FUNCTION(static, int, connect, (SOCKET, const struct sockaddr FAR *, int)); DECL_WINDOWS_FUNCTION(static, int, bind, (SOCKET, const struct sockaddr FAR *, int)); DECL_WINDOWS_FUNCTION(static, int, setsockopt, (SOCKET, int, int, const char FAR *, int)); DECL_WINDOWS_FUNCTION(static, SOCKET, socket, (int, int, int)); DECL_WINDOWS_FUNCTION(static, int, listen, (SOCKET, int)); DECL_WINDOWS_FUNCTION(static, int, send, (SOCKET, const char FAR *, int, int)); DECL_WINDOWS_FUNCTION(static, int, shutdown, (SOCKET, int)); DECL_WINDOWS_FUNCTION(static, int, ioctlsocket, (SOCKET, long, u_long FAR *)); DECL_WINDOWS_FUNCTION(static, SOCKET, accept, (SOCKET, struct sockaddr FAR *, int FAR *)); DECL_WINDOWS_FUNCTION(static, int, getpeername, (SOCKET, struct sockaddr FAR *, int FAR *)); DECL_WINDOWS_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int)); DECL_WINDOWS_FUNCTION(static, int, WSAIoctl, (SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD, LPDWORD, LPWSAOVERLAPPED, LPWSAOVERLAPPED_COMPLETION_ROUTINE)); #ifndef NO_IPV6 DECL_WINDOWS_FUNCTION(static, int, getaddrinfo, (const char *nodename, const char *servname, const struct addrinfo *hints, struct addrinfo **res)); DECL_WINDOWS_FUNCTION(static, void, freeaddrinfo, (struct addrinfo *res)); DECL_WINDOWS_FUNCTION(static, int, getnameinfo, (const struct sockaddr FAR * sa, socklen_t salen, char FAR * host, DWORD hostlen, char FAR * serv, DWORD servlen, int flags)); DECL_WINDOWS_FUNCTION(static, char *, gai_strerror, (int ecode)); DECL_WINDOWS_FUNCTION(static, int, WSAAddressToStringA, (LPSOCKADDR, DWORD, LPWSAPROTOCOL_INFO, LPSTR, LPDWORD)); #endif static HMODULE winsock_module = NULL; static WSADATA wsadata; #ifndef NO_IPV6 static HMODULE winsock2_module = NULL; static HMODULE wship6_module = NULL; #endif static bool sk_startup(int hi, int lo) { WORD winsock_ver; winsock_ver = MAKEWORD(hi, lo); if (p_WSAStartup(winsock_ver, &wsadata)) { return false; } if (LOBYTE(wsadata.wVersion) != LOBYTE(winsock_ver)) { return false; } return true; } DEF_WINDOWS_FUNCTION(WSAAsyncSelect); DEF_WINDOWS_FUNCTION(WSAEventSelect); DEF_WINDOWS_FUNCTION(WSAGetLastError); DEF_WINDOWS_FUNCTION(WSAEnumNetworkEvents); DEF_WINDOWS_FUNCTION(select); void sk_init(void) { #ifndef NO_IPV6 winsock2_module = #endif winsock_module = load_system32_dll("ws2_32.dll"); if (!winsock_module) { winsock_module = load_system32_dll("wsock32.dll"); } if (!winsock_module) modalfatalbox("Unable to load any WinSock library"); #ifndef NO_IPV6 /* Check if we have getaddrinfo in Winsock */ if (GetProcAddress(winsock_module, "getaddrinfo") != NULL) { GET_WINDOWS_FUNCTION(winsock_module, getaddrinfo); GET_WINDOWS_FUNCTION(winsock_module, freeaddrinfo); GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, getnameinfo); /* This function would fail its type-check if we did one, * because the VS header file provides an inline definition * which is __cdecl instead of WINAPI. */ GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, gai_strerror); } else { /* Fall back to wship6.dll for Windows 2000 */ wship6_module = load_system32_dll("wship6.dll"); if (wship6_module) { GET_WINDOWS_FUNCTION(wship6_module, getaddrinfo); GET_WINDOWS_FUNCTION(wship6_module, freeaddrinfo); /* See comment above about type check */ GET_WINDOWS_FUNCTION_NO_TYPECHECK(wship6_module, getnameinfo); GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, gai_strerror); } else { } } GET_WINDOWS_FUNCTION(winsock2_module, WSAAddressToStringA); #endif GET_WINDOWS_FUNCTION(winsock_module, WSAAsyncSelect); GET_WINDOWS_FUNCTION(winsock_module, WSAEventSelect); /* We don't type-check select because at least some MinGW versions * of the Windows API headers seem to disagree with the * documentation on whether the 'struct timeval *' pointer is * const or not. */ GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, select); GET_WINDOWS_FUNCTION(winsock_module, WSAGetLastError); GET_WINDOWS_FUNCTION(winsock_module, WSAEnumNetworkEvents); GET_WINDOWS_FUNCTION(winsock_module, WSAStartup); GET_WINDOWS_FUNCTION(winsock_module, WSACleanup); GET_WINDOWS_FUNCTION(winsock_module, closesocket); #ifndef COVERITY GET_WINDOWS_FUNCTION(winsock_module, ntohl); GET_WINDOWS_FUNCTION(winsock_module, htonl); GET_WINDOWS_FUNCTION(winsock_module, htons); GET_WINDOWS_FUNCTION(winsock_module, ntohs); GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, gethostname); #else /* The toolchain I use for Windows Coverity builds doesn't know * the type signatures of these */ GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, ntohl); GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, htonl); GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, htons); GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, ntohs); GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, gethostname); #endif GET_WINDOWS_FUNCTION(winsock_module, gethostbyname); GET_WINDOWS_FUNCTION(winsock_module, getservbyname); GET_WINDOWS_FUNCTION(winsock_module, inet_addr); GET_WINDOWS_FUNCTION(winsock_module, inet_ntoa); /* Older Visual Studio, and MinGW as of Ubuntu 16.04, don't know * about this function at all, so can't type-check it. Also there * seems to be some disagreement in the VS headers about whether * the second argument is void * or const void *, so I omit the * type check. */ GET_WINDOWS_FUNCTION_NO_TYPECHECK(winsock_module, inet_ntop); GET_WINDOWS_FUNCTION(winsock_module, connect); GET_WINDOWS_FUNCTION(winsock_module, bind); GET_WINDOWS_FUNCTION(winsock_module, setsockopt); GET_WINDOWS_FUNCTION(winsock_module, socket); GET_WINDOWS_FUNCTION(winsock_module, listen); GET_WINDOWS_FUNCTION(winsock_module, send); GET_WINDOWS_FUNCTION(winsock_module, shutdown); GET_WINDOWS_FUNCTION(winsock_module, ioctlsocket); GET_WINDOWS_FUNCTION(winsock_module, accept); GET_WINDOWS_FUNCTION(winsock_module, getpeername); GET_WINDOWS_FUNCTION(winsock_module, recv); GET_WINDOWS_FUNCTION(winsock_module, WSAIoctl); /* Try to get the best WinSock version we can get */ if (!sk_startup(2,2) && !sk_startup(2,0) && !sk_startup(1,1)) { modalfatalbox("Unable to initialise WinSock"); } sktree = newtree234(cmpfortree); } void sk_cleanup(void) { NetSocket *s; int i; if (sktree) { for (i = 0; (s = index234(sktree, i)) != NULL; i++) { p_closesocket(s->s); } freetree234(sktree); sktree = NULL; } if (p_WSACleanup) p_WSACleanup(); if (winsock_module) FreeLibrary(winsock_module); #ifndef NO_IPV6 if (wship6_module) FreeLibrary(wship6_module); #endif } const char *winsock_error_string(int error) { /* * Error codes we know about and have historically had reasonably * sensible error messages for. */ 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"; } /* * Handle any other error code by delegating to win_strerror. */ return win_strerror(error); } 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 { /* * This must be a numeric IPv4 address because it caused a * success return from inet_addr. */ ret->addresses = snewn(1, unsigned long); ret->naddresses = 1; ret->addresses[0] = p_ntohl(a); ret->resolved = true; strncpy(realhost, host, sizeof(realhost)); } realhost[lenof(realhost)-1] = '\0'; *canonicalname = dupstr(realhost); return ret; } SockAddr *sk_nonamelookup(const char *host) { SockAddr *ret = snew(SockAddr); ret->error = NULL; ret->resolved = false; #ifndef NO_IPV6 ret->ais = NULL; #endif ret->namedpipe = false; ret->addresses = NULL; ret->naddresses = 0; ret->refcount = 1; strncpy(ret->hostname, host, lenof(ret->hostname)); ret->hostname[lenof(ret->hostname)-1] = '\0'; return ret; } SockAddr *sk_namedpipe_addr(const char *pipename) { SockAddr *ret = snew(SockAddr); ret->error = NULL; ret->resolved = false; #ifndef NO_IPV6 ret->ais = NULL; #endif ret->namedpipe = true; ret->addresses = NULL; ret->naddresses = 0; ret->refcount = 1; strncpy(ret->hostname, pipename, lenof(ret->hostname)); ret->hostname[lenof(ret->hostname)-1] = '\0'; return ret; } static bool sk_nextaddr(SockAddr *addr, SockAddrStep *step) { #ifndef NO_IPV6 if (step->ai) { if (step->ai->ai_next) { step->ai = step->ai->ai_next; return true; } else return false; } #endif if (step->curraddr+1 < addr->naddresses) { step->curraddr++; return true; } else { return false; } } void sk_getaddr(SockAddr *addr, char *buf, int buflen) { SockAddrStep step; START_STEP(addr, step); #ifndef NO_IPV6 if (step.ai) { int err = 0; if (p_WSAAddressToStringA) { DWORD dwbuflen = buflen; err = p_WSAAddressToStringA(step.ai->ai_addr, step.ai->ai_addrlen, NULL, buf, &dwbuflen); } else err = -1; if (err) { strncpy(buf, addr->hostname, buflen); if (!buf[0]) strncpy(buf, "", buflen); buf[buflen-1] = '\0'; } } else #endif if (SOCKADDR_FAMILY(addr, step) == AF_INET) { struct in_addr a; assert(addr->addresses && step.curraddr < addr->naddresses); a.s_addr = p_htonl(addr->addresses[step.curraddr]); strncpy(buf, p_inet_ntoa(a), buflen); buf[buflen-1] = '\0'; } else { strncpy(buf, addr->hostname, buflen); buf[buflen-1] = '\0'; } } /* * This constructs a SockAddr that points at one specific sub-address * of a parent SockAddr. The returned SockAddr does not own all its * own memory: it points into the old one's data structures, so it * MUST NOT be used after the old one is freed, and it MUST NOT be * passed to sk_addr_free. (The latter is why it's returned by value * rather than dynamically allocated - that should clue in anyone * writing a call to it that something is weird about it.) */ static SockAddr sk_extractaddr_tmp( SockAddr *addr, const SockAddrStep *step) { SockAddr toret; toret = *addr; /* structure copy */ toret.refcount = 1; #ifndef NO_IPV6 toret.ais = step->ai; #endif if (SOCKADDR_FAMILY(addr, *step) == AF_INET #ifndef NO_IPV6 && !toret.ais #endif ) toret.addresses += step->curraddr; return toret; } bool sk_addr_needs_port(SockAddr *addr) { return !addr->namedpipe; } bool sk_hostname_is_local(const char *name) { return !strcmp(name, "localhost") || !strcmp(name, "::1") || !strncmp(name, "127.", 4); } static INTERFACE_INFO local_interfaces[16]; static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */ static bool ipv4_is_local_addr(struct in_addr addr) { if (ipv4_is_loopback(addr)) return true; /* loopback addresses are local */ if (!n_local_interfaces) { SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0); DWORD retbytes; SetHandleInformation((HANDLE)s, HANDLE_FLAG_INHERIT, 0); if (p_WSAIoctl && p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0, local_interfaces, sizeof(local_interfaces), &retbytes, NULL, NULL) == 0) n_local_interfaces = retbytes / sizeof(INTERFACE_INFO); else n_local_interfaces = -1; } if (n_local_interfaces > 0) { int i; for (i = 0; i < n_local_interfaces; i++) { SOCKADDR_IN *address = (SOCKADDR_IN *)&local_interfaces[i].iiAddress; if (address->sin_addr.s_addr == addr.s_addr) return true; /* this address is local */ } } return false; /* this address is not local */ } bool sk_address_is_local(SockAddr *addr) { SockAddrStep step; int family; START_STEP(addr, step); family = SOCKADDR_FAMILY(addr, step); #ifndef NO_IPV6 if (family == AF_INET6) { return IN6_IS_ADDR_LOOPBACK(&((const struct sockaddr_in6 *)step.ai->ai_addr)->sin6_addr); } else #endif if (family == AF_INET) { #ifndef NO_IPV6 if (step.ai) { return ipv4_is_local_addr(((struct sockaddr_in *)step.ai->ai_addr) ->sin_addr); } else #endif { struct in_addr a; assert(addr->addresses && step.curraddr < addr->naddresses); a.s_addr = p_htonl(addr->addresses[step.curraddr]); return ipv4_is_local_addr(a); } } else { assert(family == AF_UNSPEC); return false; /* we don't know; assume not */ } } bool sk_address_is_special_local(SockAddr *addr) { return false; /* no Unix-domain socket analogue here */ } int sk_addrtype(SockAddr *addr) { SockAddrStep step; int family; START_STEP(addr, step); family = SOCKADDR_FAMILY(addr, step); return (family == AF_INET ? ADDRTYPE_IPV4 : #ifndef NO_IPV6 family == AF_INET6 ? ADDRTYPE_IPV6 : #endif ADDRTYPE_NAME); } void sk_addrcopy(SockAddr *addr, char *buf) { SockAddrStep step; int family; START_STEP(addr, step); family = SOCKADDR_FAMILY(addr, step); assert(family != AF_UNSPEC); #ifndef NO_IPV6 if (step.ai) { if (family == AF_INET) memcpy(buf, &((struct sockaddr_in *)step.ai->ai_addr)->sin_addr, sizeof(struct in_addr)); else if (family == AF_INET6) memcpy(buf, &((struct sockaddr_in6 *)step.ai->ai_addr)->sin6_addr, sizeof(struct in6_addr)); else unreachable("bad address family in sk_addrcopy"); } else #endif if (family == AF_INET) { struct in_addr a; assert(addr->addresses && step.curraddr < addr->naddresses); a.s_addr = p_htonl(addr->addresses[step.curraddr]); memcpy(buf, (char*) &a.s_addr, 4); } } void sk_addr_free(SockAddr *addr) { if (--addr->refcount > 0) return; #ifndef NO_IPV6 if (addr->ais && p_freeaddrinfo) p_freeaddrinfo(addr->ais); #endif if (addr->addresses) sfree(addr->addresses); sfree(addr); } SockAddr *sk_addr_dup(SockAddr *addr) { addr->refcount++; return addr; } static Plug *sk_net_plug(Socket *sock, Plug *p) { NetSocket *s = container_of(sock, NetSocket, sock); Plug *ret = s->plug; if (p) s->plug = p; return ret; } static void sk_net_close(Socket *s); static size_t sk_net_write(Socket *s, const void *data, size_t len); static size_t sk_net_write_oob(Socket *s, const void *data, size_t len); static void sk_net_write_eof(Socket *s); static void sk_net_set_frozen(Socket *s, bool is_frozen); static const char *sk_net_socket_error(Socket *s); static SocketPeerInfo *sk_net_peer_info(Socket *s); static const SocketVtable NetSocket_sockvt = { .plug = sk_net_plug, .close = sk_net_close, .write = sk_net_write, .write_oob = sk_net_write_oob, .write_eof = sk_net_write_eof, .set_frozen = sk_net_set_frozen, .socket_error = sk_net_socket_error, .peer_info = sk_net_peer_info, }; static Socket *sk_net_accept(accept_ctx_t ctx, Plug *plug) { DWORD err; const char *errstr; NetSocket *ret; /* * Create NetSocket structure. */ ret = snew(NetSocket); ret->sock.vt = &NetSocket_sockvt; ret->error = NULL; ret->plug = plug; bufchain_init(&ret->output_data); ret->writable = true; /* to start with */ ret->sending_oob = 0; ret->outgoingeof = EOF_NO; ret->frozen = true; ret->frozen_readable = false; ret->localhost_only = false; /* unused, but best init anyway */ ret->pending_error = 0; ret->parent = ret->child = NULL; ret->addr = NULL; ret->s = (SOCKET)ctx.p; if (ret->s == INVALID_SOCKET) { err = p_WSAGetLastError(); ret->error = winsock_error_string(err); return &ret->sock; } ret->oobinline = false; /* Set up a select mechanism. This could be an AsyncSelect on a * window, or an EventSelect on an event object. */ errstr = do_select(ret->s, true); if (errstr) { ret->error = errstr; return &ret->sock; } add234(sktree, ret); return &ret->sock; } static DWORD try_connect(NetSocket *sock) { SOCKET s; #ifndef NO_IPV6 SOCKADDR_IN6 a6; #endif SOCKADDR_IN a; DWORD err; const char *errstr; short localport; int family; if (sock->s != INVALID_SOCKET) { do_select(sock->s, false); p_closesocket(sock->s); } { SockAddr thisaddr = sk_extractaddr_tmp( sock->addr, &sock->step); plug_log(sock->plug, PLUGLOG_CONNECT_TRYING, &thisaddr, sock->port, NULL, 0); } /* * Open socket. */ family = SOCKADDR_FAMILY(sock->addr, sock->step); /* * Remove the socket from the tree before we overwrite its * internal socket id, because that forms part of the tree's * sorting criterion. We'll add it back before exiting this * function, whether we changed anything or not. */ del234(sktree, sock); s = p_socket(family, SOCK_STREAM, 0); sock->s = s; if (s == INVALID_SOCKET) { err = p_WSAGetLastError(); sock->error = winsock_error_string(err); goto ret; } SetHandleInformation((HANDLE)s, HANDLE_FLAG_INHERIT, 0); if (sock->oobinline) { BOOL b = true; p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b)); } if (sock->nodelay) { BOOL b = true; p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b)); } if (sock->keepalive) { BOOL b = true; p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b)); } /* * Bind to local address. */ if (sock->privport) localport = 1023; /* count from 1023 downwards */ else localport = 0; /* just use port 0 (ie winsock picks) */ /* Loop round trying to bind */ while (1) { int sockcode; #ifndef NO_IPV6 if (family == AF_INET6) { memset(&a6, 0, sizeof(a6)); a6.sin6_family = AF_INET6; /*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */ a6.sin6_port = p_htons(localport); } else #endif { a.sin_family = AF_INET; a.sin_addr.s_addr = p_htonl(INADDR_ANY); a.sin_port = p_htons(localport); } #ifndef NO_IPV6 sockcode = p_bind(s, (family == AF_INET6 ? (struct sockaddr *) &a6 : (struct sockaddr *) &a), (family == AF_INET6 ? sizeof(a6) : sizeof(a))); #else sockcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); #endif if (sockcode != SOCKET_ERROR) { err = 0; break; /* done */ } else { err = p_WSAGetLastError(); if (err != WSAEADDRINUSE) /* failed, for a bad reason */ break; } if (localport == 0) break; /* we're only looping once */ localport--; if (localport == 0) break; /* we might have got to the end */ } if (err) { sock->error = winsock_error_string(err); goto ret; } /* * Connect to remote address. */ #ifndef NO_IPV6 if (sock->step.ai) { if (family == AF_INET6) { a6.sin6_family = AF_INET6; a6.sin6_port = p_htons((short) sock->port); a6.sin6_addr = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_addr; a6.sin6_flowinfo = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_flowinfo; a6.sin6_scope_id = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_scope_id; } else { a.sin_family = AF_INET; a.sin_addr = ((struct sockaddr_in *) sock->step.ai->ai_addr)->sin_addr; a.sin_port = p_htons((short) sock->port); } } else #endif { assert(sock->addr->addresses && sock->step.curraddr < sock->addr->naddresses); a.sin_family = AF_INET; a.sin_addr.s_addr = p_htonl(sock->addr->addresses[sock->step.curraddr]); a.sin_port = p_htons((short) sock->port); } /* Set up a select mechanism. This could be an AsyncSelect on a * window, or an EventSelect on an event object. */ errstr = do_select(s, true); if (errstr) { sock->error = errstr; err = 1; goto ret; } if (( #ifndef NO_IPV6 p_connect(s, ((family == AF_INET6) ? (struct sockaddr *) &a6 : (struct sockaddr *) &a), (family == AF_INET6) ? sizeof(a6) : sizeof(a)) #else p_connect(s, (struct sockaddr *) &a, sizeof(a)) #endif ) == SOCKET_ERROR) { err = p_WSAGetLastError(); /* * We expect a potential EWOULDBLOCK here, because the * chances are the front end has done a select for * FD_CONNECT, so that connect() will complete * asynchronously. */ if ( err != WSAEWOULDBLOCK ) { sock->error = winsock_error_string(err); goto ret; } } else { /* * If we _don't_ get EWOULDBLOCK, the connect has completed * and we should set the socket as writable. */ sock->writable = true; SockAddr thisaddr = sk_extractaddr_tmp(sock->addr, &sock->step); plug_log(sock->plug, PLUGLOG_CONNECT_SUCCESS, &thisaddr, sock->port, NULL, 0); } err = 0; ret: /* * No matter what happened, put the socket back in the tree. */ add234(sktree, sock); if (err) { SockAddr thisaddr = sk_extractaddr_tmp( sock->addr, &sock->step); plug_log(sock->plug, PLUGLOG_CONNECT_FAILED, &thisaddr, sock->port, sock->error, err); } return err; } Socket *sk_new(SockAddr *addr, int port, bool privport, bool oobinline, bool nodelay, bool keepalive, Plug *plug) { NetSocket *ret; DWORD err; /* * Create NetSocket structure. */ ret = snew(NetSocket); ret->sock.vt = &NetSocket_sockvt; ret->error = NULL; ret->plug = plug; bufchain_init(&ret->output_data); ret->connected = false; /* to start with */ ret->writable = false; /* to start with */ ret->sending_oob = 0; ret->outgoingeof = EOF_NO; ret->frozen = false; ret->frozen_readable = false; ret->localhost_only = false; /* unused, but best init anyway */ ret->pending_error = 0; ret->parent = ret->child = NULL; ret->oobinline = oobinline; ret->nodelay = nodelay; ret->keepalive = keepalive; ret->privport = privport; ret->port = port; ret->addr = addr; START_STEP(ret->addr, ret->step); ret->s = INVALID_SOCKET; err = 0; do { err = try_connect(ret); } while (err && sk_nextaddr(ret->addr, &ret->step)); return &ret->sock; } Socket *sk_newlistener(const char *srcaddr, int port, Plug *plug, bool local_host_only, int orig_address_family) { SOCKET s; #ifndef NO_IPV6 SOCKADDR_IN6 a6; #endif SOCKADDR_IN a; DWORD err; const char *errstr; NetSocket *ret; int retcode; int address_family; /* * Create NetSocket structure. */ ret = snew(NetSocket); ret->sock.vt = &NetSocket_sockvt; ret->error = NULL; ret->plug = plug; bufchain_init(&ret->output_data); ret->writable = false; /* to start with */ ret->sending_oob = 0; ret->outgoingeof = EOF_NO; ret->frozen = false; ret->frozen_readable = false; ret->localhost_only = local_host_only; ret->pending_error = 0; ret->parent = ret->child = NULL; ret->addr = NULL; /* * Translate address_family from platform-independent constants * into local reality. */ address_family = (orig_address_family == ADDRTYPE_IPV4 ? AF_INET : #ifndef NO_IPV6 orig_address_family == ADDRTYPE_IPV6 ? AF_INET6 : #endif AF_UNSPEC); /* * Our default, if passed the `don't care' value * ADDRTYPE_UNSPEC, is to listen on IPv4. If IPv6 is supported, * we will also set up a second socket listening on IPv6, but * the v4 one is primary since that ought to work even on * non-v6-supporting systems. */ if (address_family == AF_UNSPEC) address_family = AF_INET; /* * Open socket. */ s = p_socket(address_family, SOCK_STREAM, 0); ret->s = s; if (s == INVALID_SOCKET) { err = p_WSAGetLastError(); ret->error = winsock_error_string(err); return &ret->sock; } SetHandleInformation((HANDLE)s, HANDLE_FLAG_INHERIT, 0); ret->oobinline = false; { BOOL on = true; p_setsockopt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (const char *)&on, sizeof(on)); } #ifndef NO_IPV6 if (address_family == AF_INET6) { memset(&a6, 0, sizeof(a6)); a6.sin6_family = AF_INET6; if (local_host_only) a6.sin6_addr = in6addr_loopback; else a6.sin6_addr = in6addr_any; if (srcaddr != NULL && p_getaddrinfo) { struct addrinfo hints; struct addrinfo *ai; int err; memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; hints.ai_flags = 0; { /* strip [] on IPv6 address literals */ char *trimmed_addr = host_strduptrim(srcaddr); err = p_getaddrinfo(trimmed_addr, NULL, &hints, &ai); sfree(trimmed_addr); } if (err == 0 && ai->ai_family == AF_INET6) { a6.sin6_addr = ((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr; } } a6.sin6_port = p_htons(port); } else #endif { bool got_addr = false; a.sin_family = AF_INET; /* * Bind to source address. First try an explicitly * specified one... */ if (srcaddr) { a.sin_addr.s_addr = p_inet_addr(srcaddr); if (a.sin_addr.s_addr != INADDR_NONE) { /* Override localhost_only with specified listen addr. */ ret->localhost_only = ipv4_is_loopback(a.sin_addr); got_addr = true; } } /* * ... and failing that, go with one of the standard ones. */ if (!got_addr) { if (local_host_only) a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK); else a.sin_addr.s_addr = p_htonl(INADDR_ANY); } a.sin_port = p_htons((short)port); } #ifndef NO_IPV6 retcode = p_bind(s, (address_family == AF_INET6 ? (struct sockaddr *) &a6 : (struct sockaddr *) &a), (address_family == AF_INET6 ? sizeof(a6) : sizeof(a))); #else retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a)); #endif if (retcode != SOCKET_ERROR) { err = 0; } else { err = p_WSAGetLastError(); } if (err) { p_closesocket(s); ret->error = winsock_error_string(err); return &ret->sock; } if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) { p_closesocket(s); ret->error = winsock_error_string(p_WSAGetLastError()); return &ret->sock; } /* Set up a select mechanism. This could be an AsyncSelect on a * window, or an EventSelect on an event object. */ errstr = do_select(s, true); if (errstr) { p_closesocket(s); ret->error = errstr; return &ret->sock; } add234(sktree, ret); #ifndef NO_IPV6 /* * If we were given ADDRTYPE_UNSPEC, we must also create an * IPv6 listening socket and link it to this one. */ if (address_family == AF_INET && orig_address_family == ADDRTYPE_UNSPEC) { Socket *other = sk_newlistener(srcaddr, port, plug, local_host_only, ADDRTYPE_IPV6); if (other) { NetSocket *ns = container_of(other, NetSocket, sock); if (!ns->error) { ns->parent = ret; ret->child = ns; } else { sfree(ns); } } } #endif return &ret->sock; } static void sk_net_close(Socket *sock) { NetSocket *s = container_of(sock, NetSocket, sock); if (s->child) sk_net_close(&s->child->sock); bufchain_clear(&s->output_data); del234(sktree, s); do_select(s->s, false); p_closesocket(s->s); if (s->addr) sk_addr_free(s->addr); delete_callbacks_for_context(s); sfree(s); } /* * Deal with socket errors detected in try_send(). */ static void socket_error_callback(void *vs) { NetSocket *s = (NetSocket *)vs; /* * Just in case other socket work has caused this socket to vanish * or become somehow non-erroneous before this callback arrived... */ if (!find234(sktree, s, NULL) || !s->pending_error) return; /* * An error has occurred on this socket. Pass it to the plug. */ plug_closing(s->plug, winsock_error_string(s->pending_error), s->pending_error, 0); } /* * The function which tries to send on a socket once it's deemed * writable. */ void try_send(NetSocket *s) { while (s->sending_oob || bufchain_size(&s->output_data) > 0) { int nsent; DWORD err; const void *data; size_t len; int urgentflag; if (s->sending_oob) { urgentflag = MSG_OOB; len = s->sending_oob; data = &s->oobdata; } else { urgentflag = 0; ptrlen bufdata = bufchain_prefix(&s->output_data); data = bufdata.ptr; len = bufdata.len; } len = min(len, INT_MAX); /* WinSock send() takes an int */ nsent = p_send(s->s, data, len, urgentflag); noise_ultralight(NOISE_SOURCE_IOLEN, nsent); if (nsent <= 0) { err = (nsent < 0 ? p_WSAGetLastError() : 0); if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) { /* * Perfectly normal: we've sent all we can for the moment. * * (Some WinSock send() implementations can return * <0 but leave no sensible error indication - * WSAGetLastError() is called but returns zero or * a small number - so we check that case and treat * it just like WSAEWOULDBLOCK.) */ s->writable = false; return; } else { /* * If send() returns a socket error, we unfortunately * can't just call plug_closing(), because it's quite * likely that we're currently _in_ a call from the * code we'd be calling back to, so we'd have to make * half the SSH code reentrant. Instead we flag a * pending error on the socket, to be dealt with (by * calling plug_closing()) at some suitable future * moment. */ s->pending_error = err; queue_toplevel_callback(socket_error_callback, s); return; } } else { if (s->sending_oob) { if (nsent < len) { memmove(s->oobdata, s->oobdata+nsent, len-nsent); s->sending_oob = len - nsent; } else { s->sending_oob = 0; } } else { bufchain_consume(&s->output_data, nsent); } } } /* * If we reach here, we've finished sending everything we might * have needed to send. Send EOF, if we need to. */ if (s->outgoingeof == EOF_PENDING) { p_shutdown(s->s, SD_SEND); s->outgoingeof = EOF_SENT; } } static size_t sk_net_write(Socket *sock, const void *buf, size_t len) { NetSocket *s = container_of(sock, NetSocket, sock); assert(s->outgoingeof == EOF_NO); /* * Add the data to the buffer list on the socket. */ bufchain_add(&s->output_data, buf, len); /* * Now try sending from the start of the buffer list. */ if (s->writable) try_send(s); return bufchain_size(&s->output_data); } static size_t sk_net_write_oob(Socket *sock, const void *buf, size_t len) { NetSocket *s = container_of(sock, NetSocket, sock); assert(s->outgoingeof == EOF_NO); /* * Replace the buffer list on the socket with the data. */ bufchain_clear(&s->output_data); assert(len <= sizeof(s->oobdata)); memcpy(s->oobdata, buf, len); s->sending_oob = len; /* * Now try sending from the start of the buffer list. */ if (s->writable) try_send(s); return s->sending_oob; } static void sk_net_write_eof(Socket *sock) { NetSocket *s = container_of(sock, NetSocket, sock); assert(s->outgoingeof == EOF_NO); /* * Mark the socket as pending outgoing EOF. */ s->outgoingeof = EOF_PENDING; /* * Now try sending from the start of the buffer list. */ if (s->writable) try_send(s); } void select_result(WPARAM wParam, LPARAM lParam) { int ret; DWORD err; char buf[20480]; /* nice big buffer for plenty of speed */ NetSocket *s; bool atmark; /* wParam is the socket itself */ if (wParam == 0) return; /* boggle */ s = find234(sktree, (void *) wParam, cmpforsearch); if (!s) return; /* boggle */ if ((err = WSAGETSELECTERROR(lParam)) != 0) { /* * An error has occurred on this socket. Pass it to the * plug. */ if (s->addr) { SockAddr thisaddr = sk_extractaddr_tmp( s->addr, &s->step); plug_log(s->plug, PLUGLOG_CONNECT_FAILED, &thisaddr, s->port, winsock_error_string(err), err); while (err && s->addr && sk_nextaddr(s->addr, &s->step)) { err = try_connect(s); } } if (err != 0) plug_closing(s->plug, winsock_error_string(err), err, 0); return; } noise_ultralight(NOISE_SOURCE_IOID, wParam); switch (WSAGETSELECTEVENT(lParam)) { case FD_CONNECT: s->connected = true; s->writable = true; /* * Once a socket is connected, we can stop falling back * through the candidate addresses to connect to. But first, * let the plug know we were successful. */ if (s->addr) { SockAddr thisaddr = sk_extractaddr_tmp( s->addr, &s->step); plug_log(s->plug, PLUGLOG_CONNECT_SUCCESS, &thisaddr, s->port, NULL, 0); sk_addr_free(s->addr); s->addr = NULL; } break; case FD_READ: /* In the case the socket is still frozen, we don't even bother */ if (s->frozen) { s->frozen_readable = true; break; } /* * We have received data on the socket. For an oobinline * socket, this might be data _before_ an urgent pointer, * in which case we send it to the back end with type==1 * (data prior to urgent). */ if (s->oobinline) { u_long atmark_from_ioctl = 1; p_ioctlsocket(s->s, SIOCATMARK, &atmark_from_ioctl); /* * Avoid checking the return value from ioctlsocket(), * on the grounds that some WinSock wrappers don't * support it. If it does nothing, we get atmark==1, * which is equivalent to `no OOB pending', so the * effect will be to non-OOB-ify any OOB data. */ atmark = atmark_from_ioctl; } else atmark = true; ret = p_recv(s->s, buf, sizeof(buf), 0); noise_ultralight(NOISE_SOURCE_IOLEN, ret); if (ret < 0) { err = p_WSAGetLastError(); if (err == WSAEWOULDBLOCK) { break; } } if (ret < 0) { plug_closing(s->plug, winsock_error_string(err), err, 0); } else if (0 == ret) { plug_closing(s->plug, NULL, 0, 0); } else { plug_receive(s->plug, atmark ? 0 : 1, buf, ret); } break; case FD_OOB: /* * This will only happen on a non-oobinline socket. It * indicates that we can immediately perform an OOB read * and get back OOB data, which we will send to the back * end with type==2 (urgent data). */ ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB); noise_ultralight(NOISE_SOURCE_IOLEN, ret); if (ret <= 0) { int err = p_WSAGetLastError(); plug_closing(s->plug, winsock_error_string(err), err, 0); } else { plug_receive(s->plug, 2, buf, ret); } break; case FD_WRITE: { int bufsize_before, bufsize_after; s->writable = true; bufsize_before = s->sending_oob + bufchain_size(&s->output_data); try_send(s); bufsize_after = s->sending_oob + bufchain_size(&s->output_data); if (bufsize_after < bufsize_before) plug_sent(s->plug, bufsize_after); break; } case FD_CLOSE: /* Signal a close on the socket. First read any outstanding data. */ do { ret = p_recv(s->s, buf, sizeof(buf), 0); if (ret < 0) { err = p_WSAGetLastError(); if (err == WSAEWOULDBLOCK) break; plug_closing(s->plug, winsock_error_string(err), err, 0); } else { if (ret) plug_receive(s->plug, 0, buf, ret); else plug_closing(s->plug, NULL, 0, 0); } } while (ret > 0); return; case FD_ACCEPT: { #ifdef NO_IPV6 struct sockaddr_in isa; #else struct sockaddr_storage isa; #endif int addrlen = sizeof(isa); SOCKET t; /* socket of connection */ accept_ctx_t actx; memset(&isa, 0, sizeof(isa)); err = 0; t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen); if (t == INVALID_SOCKET) { err = p_WSAGetLastError(); if (err == WSATRY_AGAIN) break; } actx.p = (void *)t; #ifndef NO_IPV6 if (isa.ss_family == AF_INET && s->localhost_only && !ipv4_is_local_addr(((struct sockaddr_in *)&isa)->sin_addr)) #else if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr)) #endif { p_closesocket(t); /* dodgy WinSock let nonlocal through */ } else if (plug_accepting(s->plug, sk_net_accept, actx)) { p_closesocket(t); /* denied or error */ } break; } } } /* * Special error values are returned from sk_namelookup and sk_new * if there's a problem. These functions extract an error message, * or return NULL if there's no problem. */ const char *sk_addr_error(SockAddr *addr) { return addr->error; } static const char *sk_net_socket_error(Socket *sock) { NetSocket *s = container_of(sock, NetSocket, sock); return s->error; } static SocketPeerInfo *sk_net_peer_info(Socket *sock) { NetSocket *s = container_of(sock, NetSocket, sock); #ifdef NO_IPV6 struct sockaddr_in addr; #else struct sockaddr_storage addr; char buf[INET6_ADDRSTRLEN]; #endif int addrlen = sizeof(addr); SocketPeerInfo *pi; if (p_getpeername(s->s, (struct sockaddr *)&addr, &addrlen) < 0) return NULL; pi = snew(SocketPeerInfo); pi->addressfamily = ADDRTYPE_UNSPEC; pi->addr_text = NULL; pi->port = -1; pi->log_text = NULL; if (((struct sockaddr *)&addr)->sa_family == AF_INET) { pi->addressfamily = ADDRTYPE_IPV4; memcpy(pi->addr_bin.ipv4, &((struct sockaddr_in *)&addr)->sin_addr, 4); pi->port = p_ntohs(((struct sockaddr_in *)&addr)->sin_port); pi->addr_text = dupstr( p_inet_ntoa(((struct sockaddr_in *)&addr)->sin_addr)); pi->log_text = dupprintf("%s:%d", pi->addr_text, pi->port); #ifndef NO_IPV6 } else if (((struct sockaddr *)&addr)->sa_family == AF_INET6) { pi->addressfamily = ADDRTYPE_IPV6; memcpy(pi->addr_bin.ipv6, &((struct sockaddr_in6 *)&addr)->sin6_addr, 16); pi->port = p_ntohs(((struct sockaddr_in6 *)&addr)->sin6_port); pi->addr_text = dupstr( p_inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&addr)->sin6_addr, buf, sizeof(buf))); pi->log_text = dupprintf("[%s]:%d", pi->addr_text, pi->port); #endif } else { sfree(pi); return NULL; } return pi; } static void sk_net_set_frozen(Socket *sock, bool is_frozen) { NetSocket *s = container_of(sock, NetSocket, sock); if (s->frozen == is_frozen) return; s->frozen = is_frozen; if (!is_frozen) { do_select(s->s, true); if (s->frozen_readable) { char c; p_recv(s->s, &c, 1, MSG_PEEK); } } s->frozen_readable = false; } void socket_reselect_all(void) { NetSocket *s; int i; for (i = 0; (s = index234(sktree, i)) != NULL; i++) { if (!s->frozen) do_select(s->s, true); } } /* * For Plink: enumerate all sockets currently active. */ SOCKET first_socket(int *state) { NetSocket *s; *state = 0; s = index234(sktree, (*state)++); return s ? s->s : INVALID_SOCKET; } SOCKET next_socket(int *state) { NetSocket *s = index234(sktree, (*state)++); return s ? s->s : INVALID_SOCKET; } bool socket_writable(SOCKET skt) { NetSocket *s = find234(sktree, (void *)skt, cmpforsearch); if (s) return bufchain_size(&s->output_data) > 0; else return false; } int net_service_lookup(char *service) { struct servent *se; se = p_getservbyname(service, NULL); if (se != NULL) return p_ntohs(se->s_port); else return 0; } char *get_hostname(void) { char hostbuf[256]; /* MSDN docs for gethostname() promise this is enough */ if (p_gethostname(hostbuf, sizeof(hostbuf)) < 0) return NULL; return dupstr(hostbuf); } SockAddr *platform_get_x11_unix_address(const char *display, int displaynum) { SockAddr *ret = snew(SockAddr); memset(ret, 0, sizeof(SockAddr)); ret->error = "unix sockets not supported on this platform"; ret->refcount = 1; return ret; }