+++ /dev/null
-/*\r
- * Windows networking abstraction.\r
- *\r
- * For the IPv6 code in here I am indebted to Jeroen Massar and\r
- * unfix.org.\r
- */\r
-\r
-#include <stdio.h>\r
-#include <stdlib.h>\r
-#include <assert.h>\r
-\r
-#define DEFINE_PLUG_METHOD_MACROS\r
-#include "putty.h"\r
-#include "network.h"\r
-#include "tree234.h"\r
-\r
-#include <ws2tcpip.h>\r
-\r
-#ifndef NO_IPV6\r
-const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;\r
-const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;\r
-#endif\r
-\r
-#define ipv4_is_loopback(addr) \\r
- ((p_ntohl(addr.s_addr) & 0xFF000000L) == 0x7F000000L)\r
-\r
-/*\r
- * We used to typedef struct Socket_tag *Socket.\r
- *\r
- * Since we have made the networking abstraction slightly more\r
- * abstract, Socket no longer means a tcp socket (it could mean\r
- * an ssl socket). So now we must use Actual_Socket when we know\r
- * we are talking about a tcp socket.\r
- */\r
-typedef struct Socket_tag *Actual_Socket;\r
-\r
-/*\r
- * Mutable state that goes with a SockAddr: stores information\r
- * about where in the list of candidate IP(v*) addresses we've\r
- * currently got to.\r
- */\r
-typedef struct SockAddrStep_tag SockAddrStep;\r
-struct SockAddrStep_tag {\r
-#ifndef NO_IPV6\r
- struct addrinfo *ai; /* steps along addr->ais */\r
-#endif\r
- int curraddr;\r
-};\r
-\r
-struct Socket_tag {\r
- const struct socket_function_table *fn;\r
- /* the above variable absolutely *must* be the first in this structure */\r
- char *error;\r
- SOCKET s;\r
- Plug plug;\r
- void *private_ptr;\r
- bufchain output_data;\r
- int connected;\r
- int writable;\r
- int frozen; /* this causes readability notifications to be ignored */\r
- int frozen_readable; /* this means we missed at least one readability\r
- * notification while we were frozen */\r
- int localhost_only; /* for listening sockets */\r
- char oobdata[1];\r
- int sending_oob;\r
- int oobinline, nodelay, keepalive, privport;\r
- SockAddr addr;\r
- SockAddrStep step;\r
- int port;\r
- int pending_error; /* in case send() returns error */\r
- /*\r
- * We sometimes need pairs of Socket structures to be linked:\r
- * if we are listening on the same IPv6 and v4 port, for\r
- * example. So here we define `parent' and `child' pointers to\r
- * track this link.\r
- */\r
- Actual_Socket parent, child;\r
-};\r
-\r
-struct SockAddr_tag {\r
- int refcount;\r
- char *error;\r
- int resolved;\r
-#ifndef NO_IPV6\r
- struct addrinfo *ais; /* Addresses IPv6 style. */\r
-#endif\r
- unsigned long *addresses; /* Addresses IPv4 style. */\r
- int naddresses;\r
- char hostname[512]; /* Store an unresolved host name. */\r
-};\r
-\r
-/*\r
- * Which address family this address belongs to. AF_INET for IPv4;\r
- * AF_INET6 for IPv6; AF_UNSPEC indicates that name resolution has\r
- * not been done and a simple host name is held in this SockAddr\r
- * structure.\r
- */\r
-#ifndef NO_IPV6\r
-#define SOCKADDR_FAMILY(addr, step) \\r
- (!(addr)->resolved ? AF_UNSPEC : \\r
- (step).ai ? (step).ai->ai_family : AF_INET)\r
-#else\r
-#define SOCKADDR_FAMILY(addr, step) \\r
- (!(addr)->resolved ? AF_UNSPEC : AF_INET)\r
-#endif\r
-\r
-/*\r
- * Start a SockAddrStep structure to step through multiple\r
- * addresses.\r
- */\r
-#ifndef NO_IPV6\r
-#define START_STEP(addr, step) \\r
- ((step).ai = (addr)->ais, (step).curraddr = 0)\r
-#else\r
-#define START_STEP(addr, step) \\r
- ((step).curraddr = 0)\r
-#endif\r
-\r
-static tree234 *sktree;\r
-\r
-static int cmpfortree(void *av, void *bv)\r
-{\r
- Actual_Socket a = (Actual_Socket) av, b = (Actual_Socket) bv;\r
- unsigned long as = (unsigned long) a->s, bs = (unsigned long) b->s;\r
- if (as < bs)\r
- return -1;\r
- if (as > bs)\r
- return +1;\r
- if (a < b)\r
- return -1;\r
- if (a > b)\r
- return +1;\r
- return 0;\r
-}\r
-\r
-static int cmpforsearch(void *av, void *bv)\r
-{\r
- Actual_Socket b = (Actual_Socket) bv;\r
- unsigned long as = (unsigned long) av, bs = (unsigned long) b->s;\r
- if (as < bs)\r
- return -1;\r
- if (as > bs)\r
- return +1;\r
- return 0;\r
-}\r
-\r
-DECL_WINDOWS_FUNCTION(static, int, WSAStartup, (WORD, LPWSADATA));\r
-DECL_WINDOWS_FUNCTION(static, int, WSACleanup, (void));\r
-DECL_WINDOWS_FUNCTION(static, int, closesocket, (SOCKET));\r
-DECL_WINDOWS_FUNCTION(static, u_long, ntohl, (u_long));\r
-DECL_WINDOWS_FUNCTION(static, u_long, htonl, (u_long));\r
-DECL_WINDOWS_FUNCTION(static, u_short, htons, (u_short));\r
-DECL_WINDOWS_FUNCTION(static, u_short, ntohs, (u_short));\r
-DECL_WINDOWS_FUNCTION(static, int, gethostname, (char *, int));\r
-DECL_WINDOWS_FUNCTION(static, struct hostent FAR *, gethostbyname,\r
- (const char FAR *));\r
-DECL_WINDOWS_FUNCTION(static, struct servent FAR *, getservbyname,\r
- (const char FAR *, const char FAR *));\r
-DECL_WINDOWS_FUNCTION(static, unsigned long, inet_addr, (const char FAR *));\r
-DECL_WINDOWS_FUNCTION(static, char FAR *, inet_ntoa, (struct in_addr));\r
-DECL_WINDOWS_FUNCTION(static, int, connect,\r
- (SOCKET, const struct sockaddr FAR *, int));\r
-DECL_WINDOWS_FUNCTION(static, int, bind,\r
- (SOCKET, const struct sockaddr FAR *, int));\r
-DECL_WINDOWS_FUNCTION(static, int, setsockopt,\r
- (SOCKET, int, int, const char FAR *, int));\r
-DECL_WINDOWS_FUNCTION(static, SOCKET, socket, (int, int, int));\r
-DECL_WINDOWS_FUNCTION(static, int, listen, (SOCKET, int));\r
-DECL_WINDOWS_FUNCTION(static, int, send, (SOCKET, const char FAR *, int, int));\r
-DECL_WINDOWS_FUNCTION(static, int, ioctlsocket,\r
- (SOCKET, long, u_long FAR *));\r
-DECL_WINDOWS_FUNCTION(static, SOCKET, accept,\r
- (SOCKET, struct sockaddr FAR *, int FAR *));\r
-DECL_WINDOWS_FUNCTION(static, int, recv, (SOCKET, char FAR *, int, int));\r
-DECL_WINDOWS_FUNCTION(static, int, WSAIoctl,\r
- (SOCKET, DWORD, LPVOID, DWORD, LPVOID, DWORD,\r
- LPDWORD, LPWSAOVERLAPPED,\r
- LPWSAOVERLAPPED_COMPLETION_ROUTINE));\r
-#ifndef NO_IPV6\r
-DECL_WINDOWS_FUNCTION(static, int, getaddrinfo,\r
- (const char *nodename, const char *servname,\r
- const struct addrinfo *hints, struct addrinfo **res));\r
-DECL_WINDOWS_FUNCTION(static, void, freeaddrinfo, (struct addrinfo *res));\r
-DECL_WINDOWS_FUNCTION(static, int, getnameinfo,\r
- (const struct sockaddr FAR * sa, socklen_t salen,\r
- char FAR * host, size_t hostlen, char FAR * serv,\r
- size_t servlen, int flags));\r
-DECL_WINDOWS_FUNCTION(static, char *, gai_strerror, (int ecode));\r
-DECL_WINDOWS_FUNCTION(static, int, WSAAddressToStringA,\r
- (LPSOCKADDR, DWORD, LPWSAPROTOCOL_INFO,\r
- LPSTR, LPDWORD));\r
-#endif\r
-\r
-static HMODULE winsock_module = NULL;\r
-static WSADATA wsadata;\r
-#ifndef NO_IPV6\r
-static HMODULE winsock2_module = NULL;\r
-static HMODULE wship6_module = NULL;\r
-#endif\r
-\r
-int sk_startup(int hi, int lo)\r
-{\r
- WORD winsock_ver;\r
-\r
- winsock_ver = MAKEWORD(hi, lo);\r
-\r
- if (p_WSAStartup(winsock_ver, &wsadata)) {\r
- return FALSE;\r
- }\r
-\r
- if (LOBYTE(wsadata.wVersion) != LOBYTE(winsock_ver)) {\r
- return FALSE;\r
- }\r
-\r
-#ifdef NET_SETUP_DIAGNOSTICS\r
- {\r
- char buf[80];\r
- sprintf(buf, "Using WinSock %d.%d", hi, lo);\r
- logevent(NULL, buf);\r
- }\r
-#endif\r
- return TRUE;\r
-}\r
-\r
-void sk_init(void)\r
-{\r
-#ifndef NO_IPV6\r
- winsock2_module =\r
-#endif\r
- winsock_module = load_system32_dll("ws2_32.dll");\r
- if (!winsock_module) {\r
- winsock_module = load_system32_dll("wsock32.dll");\r
- }\r
- if (!winsock_module)\r
- fatalbox("Unable to load any WinSock library");\r
-\r
-#ifndef NO_IPV6\r
- /* Check if we have getaddrinfo in Winsock */\r
- if (GetProcAddress(winsock_module, "getaddrinfo") != NULL) {\r
-#ifdef NET_SETUP_DIAGNOSTICS\r
- logevent(NULL, "Native WinSock IPv6 support detected");\r
-#endif\r
- GET_WINDOWS_FUNCTION(winsock_module, getaddrinfo);\r
- GET_WINDOWS_FUNCTION(winsock_module, freeaddrinfo);\r
- GET_WINDOWS_FUNCTION(winsock_module, getnameinfo);\r
- GET_WINDOWS_FUNCTION(winsock_module, gai_strerror);\r
- } else {\r
- /* Fall back to wship6.dll for Windows 2000 */\r
- wship6_module = load_system32_dll("wship6.dll");\r
- if (wship6_module) {\r
-#ifdef NET_SETUP_DIAGNOSTICS\r
- logevent(NULL, "WSH IPv6 support detected");\r
-#endif\r
- GET_WINDOWS_FUNCTION(wship6_module, getaddrinfo);\r
- GET_WINDOWS_FUNCTION(wship6_module, freeaddrinfo);\r
- GET_WINDOWS_FUNCTION(wship6_module, getnameinfo);\r
- GET_WINDOWS_FUNCTION(wship6_module, gai_strerror);\r
- } else {\r
-#ifdef NET_SETUP_DIAGNOSTICS\r
- logevent(NULL, "No IPv6 support detected");\r
-#endif\r
- }\r
- }\r
- GET_WINDOWS_FUNCTION(winsock2_module, WSAAddressToStringA);\r
-#else\r
-#ifdef NET_SETUP_DIAGNOSTICS\r
- logevent(NULL, "PuTTY was built without IPv6 support");\r
-#endif\r
-#endif\r
-\r
- GET_WINDOWS_FUNCTION(winsock_module, WSAAsyncSelect);\r
- GET_WINDOWS_FUNCTION(winsock_module, WSAEventSelect);\r
- GET_WINDOWS_FUNCTION(winsock_module, select);\r
- GET_WINDOWS_FUNCTION(winsock_module, WSAGetLastError);\r
- GET_WINDOWS_FUNCTION(winsock_module, WSAEnumNetworkEvents);\r
- GET_WINDOWS_FUNCTION(winsock_module, WSAStartup);\r
- GET_WINDOWS_FUNCTION(winsock_module, WSACleanup);\r
- GET_WINDOWS_FUNCTION(winsock_module, closesocket);\r
- GET_WINDOWS_FUNCTION(winsock_module, ntohl);\r
- GET_WINDOWS_FUNCTION(winsock_module, htonl);\r
- GET_WINDOWS_FUNCTION(winsock_module, htons);\r
- GET_WINDOWS_FUNCTION(winsock_module, ntohs);\r
- GET_WINDOWS_FUNCTION(winsock_module, gethostname);\r
- GET_WINDOWS_FUNCTION(winsock_module, gethostbyname);\r
- GET_WINDOWS_FUNCTION(winsock_module, getservbyname);\r
- GET_WINDOWS_FUNCTION(winsock_module, inet_addr);\r
- GET_WINDOWS_FUNCTION(winsock_module, inet_ntoa);\r
- GET_WINDOWS_FUNCTION(winsock_module, connect);\r
- GET_WINDOWS_FUNCTION(winsock_module, bind);\r
- GET_WINDOWS_FUNCTION(winsock_module, setsockopt);\r
- GET_WINDOWS_FUNCTION(winsock_module, socket);\r
- GET_WINDOWS_FUNCTION(winsock_module, listen);\r
- GET_WINDOWS_FUNCTION(winsock_module, send);\r
- GET_WINDOWS_FUNCTION(winsock_module, ioctlsocket);\r
- GET_WINDOWS_FUNCTION(winsock_module, accept);\r
- GET_WINDOWS_FUNCTION(winsock_module, recv);\r
- GET_WINDOWS_FUNCTION(winsock_module, WSAIoctl);\r
-\r
- /* Try to get the best WinSock version we can get */\r
- if (!sk_startup(2,2) &&\r
- !sk_startup(2,0) &&\r
- !sk_startup(1,1)) {\r
- fatalbox("Unable to initialise WinSock");\r
- }\r
-\r
- sktree = newtree234(cmpfortree);\r
-}\r
-\r
-void sk_cleanup(void)\r
-{\r
- Actual_Socket s;\r
- int i;\r
-\r
- if (sktree) {\r
- for (i = 0; (s = index234(sktree, i)) != NULL; i++) {\r
- p_closesocket(s->s);\r
- }\r
- freetree234(sktree);\r
- sktree = NULL;\r
- }\r
-\r
- if (p_WSACleanup)\r
- p_WSACleanup();\r
- if (winsock_module)\r
- FreeLibrary(winsock_module);\r
-#ifndef NO_IPV6\r
- if (wship6_module)\r
- FreeLibrary(wship6_module);\r
-#endif\r
-}\r
-\r
-char *winsock_error_string(int error)\r
-{\r
- switch (error) {\r
- case WSAEACCES:\r
- return "Network error: Permission denied";\r
- case WSAEADDRINUSE:\r
- return "Network error: Address already in use";\r
- case WSAEADDRNOTAVAIL:\r
- return "Network error: Cannot assign requested address";\r
- case WSAEAFNOSUPPORT:\r
- return\r
- "Network error: Address family not supported by protocol family";\r
- case WSAEALREADY:\r
- return "Network error: Operation already in progress";\r
- case WSAECONNABORTED:\r
- return "Network error: Software caused connection abort";\r
- case WSAECONNREFUSED:\r
- return "Network error: Connection refused";\r
- case WSAECONNRESET:\r
- return "Network error: Connection reset by peer";\r
- case WSAEDESTADDRREQ:\r
- return "Network error: Destination address required";\r
- case WSAEFAULT:\r
- return "Network error: Bad address";\r
- case WSAEHOSTDOWN:\r
- return "Network error: Host is down";\r
- case WSAEHOSTUNREACH:\r
- return "Network error: No route to host";\r
- case WSAEINPROGRESS:\r
- return "Network error: Operation now in progress";\r
- case WSAEINTR:\r
- return "Network error: Interrupted function call";\r
- case WSAEINVAL:\r
- return "Network error: Invalid argument";\r
- case WSAEISCONN:\r
- return "Network error: Socket is already connected";\r
- case WSAEMFILE:\r
- return "Network error: Too many open files";\r
- case WSAEMSGSIZE:\r
- return "Network error: Message too long";\r
- case WSAENETDOWN:\r
- return "Network error: Network is down";\r
- case WSAENETRESET:\r
- return "Network error: Network dropped connection on reset";\r
- case WSAENETUNREACH:\r
- return "Network error: Network is unreachable";\r
- case WSAENOBUFS:\r
- return "Network error: No buffer space available";\r
- case WSAENOPROTOOPT:\r
- return "Network error: Bad protocol option";\r
- case WSAENOTCONN:\r
- return "Network error: Socket is not connected";\r
- case WSAENOTSOCK:\r
- return "Network error: Socket operation on non-socket";\r
- case WSAEOPNOTSUPP:\r
- return "Network error: Operation not supported";\r
- case WSAEPFNOSUPPORT:\r
- return "Network error: Protocol family not supported";\r
- case WSAEPROCLIM:\r
- return "Network error: Too many processes";\r
- case WSAEPROTONOSUPPORT:\r
- return "Network error: Protocol not supported";\r
- case WSAEPROTOTYPE:\r
- return "Network error: Protocol wrong type for socket";\r
- case WSAESHUTDOWN:\r
- return "Network error: Cannot send after socket shutdown";\r
- case WSAESOCKTNOSUPPORT:\r
- return "Network error: Socket type not supported";\r
- case WSAETIMEDOUT:\r
- return "Network error: Connection timed out";\r
- case WSAEWOULDBLOCK:\r
- return "Network error: Resource temporarily unavailable";\r
- case WSAEDISCON:\r
- return "Network error: Graceful shutdown in progress";\r
- default:\r
- return "Unknown network error";\r
- }\r
-}\r
-\r
-SockAddr sk_namelookup(const char *host, char **canonicalname,\r
- int address_family)\r
-{\r
- SockAddr ret = snew(struct SockAddr_tag);\r
- unsigned long a;\r
- char realhost[8192];\r
- int hint_family;\r
-\r
- /* Default to IPv4. */\r
- hint_family = (address_family == ADDRTYPE_IPV4 ? AF_INET :\r
-#ifndef NO_IPV6\r
- address_family == ADDRTYPE_IPV6 ? AF_INET6 :\r
-#endif\r
- AF_UNSPEC);\r
-\r
- /* Clear the structure and default to IPv4. */\r
- memset(ret, 0, sizeof(struct SockAddr_tag));\r
-#ifndef NO_IPV6\r
- ret->ais = NULL;\r
-#endif\r
- ret->addresses = NULL;\r
- ret->resolved = FALSE;\r
- ret->refcount = 1;\r
- *realhost = '\0';\r
-\r
- if ((a = p_inet_addr(host)) == (unsigned long) INADDR_NONE) {\r
- struct hostent *h = NULL;\r
- int err;\r
-#ifndef NO_IPV6\r
- /*\r
- * Use getaddrinfo when it's available\r
- */\r
- if (p_getaddrinfo) {\r
- struct addrinfo hints;\r
-#ifdef NET_SETUP_DIAGNOSTICS\r
- logevent(NULL, "Using getaddrinfo() for resolving");\r
-#endif\r
- memset(&hints, 0, sizeof(hints));\r
- hints.ai_family = hint_family;\r
- hints.ai_flags = AI_CANONNAME;\r
- if ((err = p_getaddrinfo(host, NULL, &hints, &ret->ais)) == 0)\r
- ret->resolved = TRUE;\r
- } else\r
-#endif\r
- {\r
-#ifdef NET_SETUP_DIAGNOSTICS\r
- logevent(NULL, "Using gethostbyname() for resolving");\r
-#endif\r
- /*\r
- * Otherwise use the IPv4-only gethostbyname...\r
- * (NOTE: we don't use gethostbyname as a fallback!)\r
- */\r
- if ( (h = p_gethostbyname(host)) )\r
- ret->resolved = TRUE;\r
- else\r
- err = p_WSAGetLastError();\r
- }\r
-\r
- if (!ret->resolved) {\r
- ret->error = (err == WSAENETDOWN ? "Network is down" :\r
- err == WSAHOST_NOT_FOUND ? "Host does not exist" :\r
- err == WSATRY_AGAIN ? "Host not found" :\r
-#ifndef NO_IPV6\r
- p_getaddrinfo&&p_gai_strerror ? p_gai_strerror(err) :\r
-#endif\r
- "gethostbyname: unknown error");\r
- } else {\r
- ret->error = NULL;\r
-\r
-#ifndef NO_IPV6\r
- /* If we got an address info use that... */\r
- if (ret->ais) {\r
- /* Are we in IPv4 fallback mode? */\r
- /* We put the IPv4 address into the a variable so we can further-on use the IPv4 code... */\r
- if (ret->ais->ai_family == AF_INET)\r
- memcpy(&a,\r
- (char *) &((SOCKADDR_IN *) ret->ais->\r
- ai_addr)->sin_addr, sizeof(a));\r
-\r
- if (ret->ais->ai_canonname)\r
- strncpy(realhost, ret->ais->ai_canonname, lenof(realhost));\r
- else\r
- strncpy(realhost, host, lenof(realhost));\r
- }\r
- /* We used the IPv4-only gethostbyname()... */\r
- else\r
-#endif\r
- {\r
- int n;\r
- for (n = 0; h->h_addr_list[n]; n++);\r
- ret->addresses = snewn(n, unsigned long);\r
- ret->naddresses = n;\r
- for (n = 0; n < ret->naddresses; n++) {\r
- memcpy(&a, h->h_addr_list[n], sizeof(a));\r
- ret->addresses[n] = p_ntohl(a);\r
- }\r
- memcpy(&a, h->h_addr, sizeof(a));\r
- /* This way we are always sure the h->h_name is valid :) */\r
- strncpy(realhost, h->h_name, sizeof(realhost));\r
- }\r
- }\r
- } else {\r
- /*\r
- * This must be a numeric IPv4 address because it caused a\r
- * success return from inet_addr.\r
- */\r
- ret->addresses = snewn(1, unsigned long);\r
- ret->naddresses = 1;\r
- ret->addresses[0] = p_ntohl(a);\r
- ret->resolved = TRUE;\r
- strncpy(realhost, host, sizeof(realhost));\r
- }\r
- realhost[lenof(realhost)-1] = '\0';\r
- *canonicalname = snewn(1+strlen(realhost), char);\r
- strcpy(*canonicalname, realhost);\r
- return ret;\r
-}\r
-\r
-SockAddr sk_nonamelookup(const char *host)\r
-{\r
- SockAddr ret = snew(struct SockAddr_tag);\r
- ret->error = NULL;\r
- ret->resolved = FALSE;\r
-#ifndef NO_IPV6\r
- ret->ais = NULL;\r
-#endif\r
- ret->addresses = NULL;\r
- ret->naddresses = 0;\r
- ret->refcount = 1;\r
- strncpy(ret->hostname, host, lenof(ret->hostname));\r
- ret->hostname[lenof(ret->hostname)-1] = '\0';\r
- return ret;\r
-}\r
-\r
-int sk_nextaddr(SockAddr addr, SockAddrStep *step)\r
-{\r
-#ifndef NO_IPV6\r
- if (step->ai) {\r
- if (step->ai->ai_next) {\r
- step->ai = step->ai->ai_next;\r
- return TRUE;\r
- } else\r
- return FALSE;\r
- }\r
-#endif\r
- if (step->curraddr+1 < addr->naddresses) {\r
- step->curraddr++;\r
- return TRUE;\r
- } else {\r
- return FALSE;\r
- }\r
-}\r
-\r
-void sk_getaddr(SockAddr addr, char *buf, int buflen)\r
-{\r
- SockAddrStep step;\r
- START_STEP(addr, step);\r
-\r
-#ifndef NO_IPV6\r
- if (step.ai) {\r
- int err = 0;\r
- if (p_WSAAddressToStringA) {\r
- DWORD dwbuflen = buflen;\r
- err = p_WSAAddressToStringA(step.ai->ai_addr, step.ai->ai_addrlen,\r
- NULL, buf, &dwbuflen);\r
- } else\r
- err = -1;\r
- if (err) {\r
- strncpy(buf, addr->hostname, buflen);\r
- if (!buf[0])\r
- strncpy(buf, "<unknown>", buflen);\r
- buf[buflen-1] = '\0';\r
- }\r
- } else\r
-#endif\r
- if (SOCKADDR_FAMILY(addr, step) == AF_INET) {\r
- struct in_addr a;\r
- assert(addr->addresses && step.curraddr < addr->naddresses);\r
- a.s_addr = p_htonl(addr->addresses[step.curraddr]);\r
- strncpy(buf, p_inet_ntoa(a), buflen);\r
- buf[buflen-1] = '\0';\r
- } else {\r
- strncpy(buf, addr->hostname, buflen);\r
- buf[buflen-1] = '\0';\r
- }\r
-}\r
-\r
-int sk_hostname_is_local(char *name)\r
-{\r
- return !strcmp(name, "localhost") ||\r
- !strcmp(name, "::1") ||\r
- !strncmp(name, "127.", 4);\r
-}\r
-\r
-static INTERFACE_INFO local_interfaces[16];\r
-static int n_local_interfaces; /* 0=not yet, -1=failed, >0=number */\r
-\r
-static int ipv4_is_local_addr(struct in_addr addr)\r
-{\r
- if (ipv4_is_loopback(addr))\r
- return 1; /* loopback addresses are local */\r
- if (!n_local_interfaces) {\r
- SOCKET s = p_socket(AF_INET, SOCK_DGRAM, 0);\r
- DWORD retbytes;\r
-\r
- if (p_WSAIoctl &&\r
- p_WSAIoctl(s, SIO_GET_INTERFACE_LIST, NULL, 0,\r
- local_interfaces, sizeof(local_interfaces),\r
- &retbytes, NULL, NULL) == 0)\r
- n_local_interfaces = retbytes / sizeof(INTERFACE_INFO);\r
- else\r
- logevent(NULL, "Unable to get list of local IP addresses");\r
- }\r
- if (n_local_interfaces > 0) {\r
- int i;\r
- for (i = 0; i < n_local_interfaces; i++) {\r
- SOCKADDR_IN *address =\r
- (SOCKADDR_IN *)&local_interfaces[i].iiAddress;\r
- if (address->sin_addr.s_addr == addr.s_addr)\r
- return 1; /* this address is local */\r
- }\r
- }\r
- return 0; /* this address is not local */\r
-}\r
-\r
-int sk_address_is_local(SockAddr addr)\r
-{\r
- SockAddrStep step;\r
- int family;\r
- START_STEP(addr, step);\r
- family = SOCKADDR_FAMILY(addr, step);\r
-\r
-#ifndef NO_IPV6\r
- if (family == AF_INET6) {\r
- return IN6_IS_ADDR_LOOPBACK((const struct in6_addr *)step.ai->ai_addr);\r
- } else\r
-#endif\r
- if (family == AF_INET) {\r
-#ifndef NO_IPV6\r
- if (step.ai) {\r
- return ipv4_is_local_addr(((struct sockaddr_in *)step.ai->ai_addr)\r
- ->sin_addr);\r
- } else\r
-#endif\r
- {\r
- struct in_addr a;\r
- assert(addr->addresses && step.curraddr < addr->naddresses);\r
- a.s_addr = p_htonl(addr->addresses[step.curraddr]);\r
- return ipv4_is_local_addr(a);\r
- }\r
- } else {\r
- assert(family == AF_UNSPEC);\r
- return 0; /* we don't know; assume not */\r
- }\r
-}\r
-\r
-int sk_addrtype(SockAddr addr)\r
-{\r
- SockAddrStep step;\r
- int family;\r
- START_STEP(addr, step);\r
- family = SOCKADDR_FAMILY(addr, step);\r
-\r
- return (family == AF_INET ? ADDRTYPE_IPV4 :\r
-#ifndef NO_IPV6\r
- family == AF_INET6 ? ADDRTYPE_IPV6 :\r
-#endif\r
- ADDRTYPE_NAME);\r
-}\r
-\r
-void sk_addrcopy(SockAddr addr, char *buf)\r
-{\r
- SockAddrStep step;\r
- int family;\r
- START_STEP(addr, step);\r
- family = SOCKADDR_FAMILY(addr, step);\r
-\r
- assert(family != AF_UNSPEC);\r
-#ifndef NO_IPV6\r
- if (step.ai) {\r
- if (family == AF_INET)\r
- memcpy(buf, &((struct sockaddr_in *)step.ai->ai_addr)->sin_addr,\r
- sizeof(struct in_addr));\r
- else if (family == AF_INET6)\r
- memcpy(buf, &((struct sockaddr_in6 *)step.ai->ai_addr)->sin6_addr,\r
- sizeof(struct in6_addr));\r
- else\r
- assert(FALSE);\r
- } else\r
-#endif\r
- if (family == AF_INET) {\r
- struct in_addr a;\r
- assert(addr->addresses && step.curraddr < addr->naddresses);\r
- a.s_addr = p_htonl(addr->addresses[step.curraddr]);\r
- memcpy(buf, (char*) &a.s_addr, 4);\r
- }\r
-}\r
-\r
-void sk_addr_free(SockAddr addr)\r
-{\r
- if (--addr->refcount > 0)\r
- return;\r
-#ifndef NO_IPV6\r
- if (addr->ais && p_freeaddrinfo)\r
- p_freeaddrinfo(addr->ais);\r
-#endif\r
- if (addr->addresses)\r
- sfree(addr->addresses);\r
- sfree(addr);\r
-}\r
-\r
-SockAddr sk_addr_dup(SockAddr addr)\r
-{\r
- addr->refcount++;\r
- return addr;\r
-}\r
-\r
-static Plug sk_tcp_plug(Socket sock, Plug p)\r
-{\r
- Actual_Socket s = (Actual_Socket) sock;\r
- Plug ret = s->plug;\r
- if (p)\r
- s->plug = p;\r
- return ret;\r
-}\r
-\r
-static void sk_tcp_flush(Socket s)\r
-{\r
- /*\r
- * We send data to the socket as soon as we can anyway,\r
- * so we don't need to do anything here. :-)\r
- */\r
-}\r
-\r
-static void sk_tcp_close(Socket s);\r
-static int sk_tcp_write(Socket s, const char *data, int len);\r
-static int sk_tcp_write_oob(Socket s, const char *data, int len);\r
-static void sk_tcp_set_private_ptr(Socket s, void *ptr);\r
-static void *sk_tcp_get_private_ptr(Socket s);\r
-static void sk_tcp_set_frozen(Socket s, int is_frozen);\r
-static const char *sk_tcp_socket_error(Socket s);\r
-\r
-extern char *do_select(SOCKET skt, int startup);\r
-\r
-Socket sk_register(void *sock, Plug plug)\r
-{\r
- static const struct socket_function_table fn_table = {\r
- sk_tcp_plug,\r
- sk_tcp_close,\r
- sk_tcp_write,\r
- sk_tcp_write_oob,\r
- sk_tcp_flush,\r
- sk_tcp_set_private_ptr,\r
- sk_tcp_get_private_ptr,\r
- sk_tcp_set_frozen,\r
- sk_tcp_socket_error\r
- };\r
-\r
- DWORD err;\r
- char *errstr;\r
- Actual_Socket ret;\r
-\r
- /*\r
- * Create Socket structure.\r
- */\r
- ret = snew(struct Socket_tag);\r
- ret->fn = &fn_table;\r
- ret->error = NULL;\r
- ret->plug = plug;\r
- bufchain_init(&ret->output_data);\r
- ret->writable = 1; /* to start with */\r
- ret->sending_oob = 0;\r
- ret->frozen = 1;\r
- ret->frozen_readable = 0;\r
- ret->localhost_only = 0; /* unused, but best init anyway */\r
- ret->pending_error = 0;\r
- ret->parent = ret->child = NULL;\r
- ret->addr = NULL;\r
-\r
- ret->s = (SOCKET)sock;\r
-\r
- if (ret->s == INVALID_SOCKET) {\r
- err = p_WSAGetLastError();\r
- ret->error = winsock_error_string(err);\r
- return (Socket) ret;\r
- }\r
-\r
- ret->oobinline = 0;\r
-\r
- /* Set up a select mechanism. This could be an AsyncSelect on a\r
- * window, or an EventSelect on an event object. */\r
- errstr = do_select(ret->s, 1);\r
- if (errstr) {\r
- ret->error = errstr;\r
- return (Socket) ret;\r
- }\r
-\r
- add234(sktree, ret);\r
-\r
- return (Socket) ret;\r
-}\r
-\r
-static DWORD try_connect(Actual_Socket sock)\r
-{\r
- SOCKET s;\r
-#ifndef NO_IPV6\r
- SOCKADDR_IN6 a6;\r
-#endif\r
- SOCKADDR_IN a;\r
- DWORD err;\r
- char *errstr;\r
- short localport;\r
- int family;\r
-\r
- if (sock->s != INVALID_SOCKET) {\r
- do_select(sock->s, 0);\r
- p_closesocket(sock->s);\r
- }\r
-\r
- plug_log(sock->plug, 0, sock->addr, sock->port, NULL, 0);\r
-\r
- /*\r
- * Open socket.\r
- */\r
- family = SOCKADDR_FAMILY(sock->addr, sock->step);\r
-\r
- /*\r
- * Remove the socket from the tree before we overwrite its\r
- * internal socket id, because that forms part of the tree's\r
- * sorting criterion. We'll add it back before exiting this\r
- * function, whether we changed anything or not.\r
- */\r
- del234(sktree, sock);\r
-\r
- s = p_socket(family, SOCK_STREAM, 0);\r
- sock->s = s;\r
-\r
- if (s == INVALID_SOCKET) {\r
- err = p_WSAGetLastError();\r
- sock->error = winsock_error_string(err);\r
- goto ret;\r
- }\r
-\r
- if (sock->oobinline) {\r
- BOOL b = TRUE;\r
- p_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (void *) &b, sizeof(b));\r
- }\r
-\r
- if (sock->nodelay) {\r
- BOOL b = TRUE;\r
- p_setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void *) &b, sizeof(b));\r
- }\r
-\r
- if (sock->keepalive) {\r
- BOOL b = TRUE;\r
- p_setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *) &b, sizeof(b));\r
- }\r
-\r
- /*\r
- * Bind to local address.\r
- */\r
- if (sock->privport)\r
- localport = 1023; /* count from 1023 downwards */\r
- else\r
- localport = 0; /* just use port 0 (ie winsock picks) */\r
-\r
- /* Loop round trying to bind */\r
- while (1) {\r
- int sockcode;\r
-\r
-#ifndef NO_IPV6\r
- if (family == AF_INET6) {\r
- memset(&a6, 0, sizeof(a6));\r
- a6.sin6_family = AF_INET6;\r
- /*a6.sin6_addr = in6addr_any; */ /* == 0 done by memset() */\r
- a6.sin6_port = p_htons(localport);\r
- } else\r
-#endif\r
- {\r
- a.sin_family = AF_INET;\r
- a.sin_addr.s_addr = p_htonl(INADDR_ANY);\r
- a.sin_port = p_htons(localport);\r
- }\r
-#ifndef NO_IPV6\r
- sockcode = p_bind(s, (family == AF_INET6 ?\r
- (struct sockaddr *) &a6 :\r
- (struct sockaddr *) &a),\r
- (family == AF_INET6 ? sizeof(a6) : sizeof(a)));\r
-#else\r
- sockcode = p_bind(s, (struct sockaddr *) &a, sizeof(a));\r
-#endif\r
- if (sockcode != SOCKET_ERROR) {\r
- err = 0;\r
- break; /* done */\r
- } else {\r
- err = p_WSAGetLastError();\r
- if (err != WSAEADDRINUSE) /* failed, for a bad reason */\r
- break;\r
- }\r
-\r
- if (localport == 0)\r
- break; /* we're only looping once */\r
- localport--;\r
- if (localport == 0)\r
- break; /* we might have got to the end */\r
- }\r
-\r
- if (err) {\r
- sock->error = winsock_error_string(err);\r
- goto ret;\r
- }\r
-\r
- /*\r
- * Connect to remote address.\r
- */\r
-#ifndef NO_IPV6\r
- if (sock->step.ai) {\r
- if (family == AF_INET6) {\r
- a6.sin6_family = AF_INET6;\r
- a6.sin6_port = p_htons((short) sock->port);\r
- a6.sin6_addr =\r
- ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_addr;\r
- a6.sin6_flowinfo = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_flowinfo;\r
- a6.sin6_scope_id = ((struct sockaddr_in6 *) sock->step.ai->ai_addr)->sin6_scope_id;\r
- } else {\r
- a.sin_family = AF_INET;\r
- a.sin_addr =\r
- ((struct sockaddr_in *) sock->step.ai->ai_addr)->sin_addr;\r
- a.sin_port = p_htons((short) sock->port);\r
- }\r
- } else\r
-#endif\r
- {\r
- assert(sock->addr->addresses && sock->step.curraddr < sock->addr->naddresses);\r
- a.sin_family = AF_INET;\r
- a.sin_addr.s_addr = p_htonl(sock->addr->addresses[sock->step.curraddr]);\r
- a.sin_port = p_htons((short) sock->port);\r
- }\r
-\r
- /* Set up a select mechanism. This could be an AsyncSelect on a\r
- * window, or an EventSelect on an event object. */\r
- errstr = do_select(s, 1);\r
- if (errstr) {\r
- sock->error = errstr;\r
- err = 1;\r
- goto ret;\r
- }\r
-\r
- if ((\r
-#ifndef NO_IPV6\r
- p_connect(s,\r
- ((family == AF_INET6) ? (struct sockaddr *) &a6 :\r
- (struct sockaddr *) &a),\r
- (family == AF_INET6) ? sizeof(a6) : sizeof(a))\r
-#else\r
- p_connect(s, (struct sockaddr *) &a, sizeof(a))\r
-#endif\r
- ) == SOCKET_ERROR) {\r
- err = p_WSAGetLastError();\r
- /*\r
- * We expect a potential EWOULDBLOCK here, because the\r
- * chances are the front end has done a select for\r
- * FD_CONNECT, so that connect() will complete\r
- * asynchronously.\r
- */\r
- if ( err != WSAEWOULDBLOCK ) {\r
- sock->error = winsock_error_string(err);\r
- goto ret;\r
- }\r
- } else {\r
- /*\r
- * If we _don't_ get EWOULDBLOCK, the connect has completed\r
- * and we should set the socket as writable.\r
- */\r
- sock->writable = 1;\r
- }\r
-\r
- err = 0;\r
-\r
- ret:\r
-\r
- /*\r
- * No matter what happened, put the socket back in the tree.\r
- */\r
- add234(sktree, sock);\r
-\r
- if (err)\r
- plug_log(sock->plug, 1, sock->addr, sock->port, sock->error, err);\r
- return err;\r
-}\r
-\r
-Socket sk_new(SockAddr addr, int port, int privport, int oobinline,\r
- int nodelay, int keepalive, Plug plug)\r
-{\r
- static const struct socket_function_table fn_table = {\r
- sk_tcp_plug,\r
- sk_tcp_close,\r
- sk_tcp_write,\r
- sk_tcp_write_oob,\r
- sk_tcp_flush,\r
- sk_tcp_set_private_ptr,\r
- sk_tcp_get_private_ptr,\r
- sk_tcp_set_frozen,\r
- sk_tcp_socket_error\r
- };\r
-\r
- Actual_Socket ret;\r
- DWORD err;\r
-\r
- /*\r
- * Create Socket structure.\r
- */\r
- ret = snew(struct Socket_tag);\r
- ret->fn = &fn_table;\r
- ret->error = NULL;\r
- ret->plug = plug;\r
- bufchain_init(&ret->output_data);\r
- ret->connected = 0; /* to start with */\r
- ret->writable = 0; /* to start with */\r
- ret->sending_oob = 0;\r
- ret->frozen = 0;\r
- ret->frozen_readable = 0;\r
- ret->localhost_only = 0; /* unused, but best init anyway */\r
- ret->pending_error = 0;\r
- ret->parent = ret->child = NULL;\r
- ret->oobinline = oobinline;\r
- ret->nodelay = nodelay;\r
- ret->keepalive = keepalive;\r
- ret->privport = privport;\r
- ret->port = port;\r
- ret->addr = addr;\r
- START_STEP(ret->addr, ret->step);\r
- ret->s = INVALID_SOCKET;\r
-\r
- err = 0;\r
- do {\r
- err = try_connect(ret);\r
- } while (err && sk_nextaddr(ret->addr, &ret->step));\r
-\r
- return (Socket) ret;\r
-}\r
-\r
-Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only,\r
- int orig_address_family)\r
-{\r
- static const struct socket_function_table fn_table = {\r
- sk_tcp_plug,\r
- sk_tcp_close,\r
- sk_tcp_write,\r
- sk_tcp_write_oob,\r
- sk_tcp_flush,\r
- sk_tcp_set_private_ptr,\r
- sk_tcp_get_private_ptr,\r
- sk_tcp_set_frozen,\r
- sk_tcp_socket_error\r
- };\r
-\r
- SOCKET s;\r
-#ifndef NO_IPV6\r
- SOCKADDR_IN6 a6;\r
-#endif\r
- SOCKADDR_IN a;\r
-\r
- DWORD err;\r
- char *errstr;\r
- Actual_Socket ret;\r
- int retcode;\r
- int on = 1;\r
-\r
- int address_family;\r
-\r
- /*\r
- * Create Socket structure.\r
- */\r
- ret = snew(struct Socket_tag);\r
- ret->fn = &fn_table;\r
- ret->error = NULL;\r
- ret->plug = plug;\r
- bufchain_init(&ret->output_data);\r
- ret->writable = 0; /* to start with */\r
- ret->sending_oob = 0;\r
- ret->frozen = 0;\r
- ret->frozen_readable = 0;\r
- ret->localhost_only = local_host_only;\r
- ret->pending_error = 0;\r
- ret->parent = ret->child = NULL;\r
- ret->addr = NULL;\r
-\r
- /*\r
- * Translate address_family from platform-independent constants\r
- * into local reality.\r
- */\r
- address_family = (orig_address_family == ADDRTYPE_IPV4 ? AF_INET :\r
-#ifndef NO_IPV6\r
- orig_address_family == ADDRTYPE_IPV6 ? AF_INET6 :\r
-#endif\r
- AF_UNSPEC);\r
-\r
- /*\r
- * Our default, if passed the `don't care' value\r
- * ADDRTYPE_UNSPEC, is to listen on IPv4. If IPv6 is supported,\r
- * we will also set up a second socket listening on IPv6, but\r
- * the v4 one is primary since that ought to work even on\r
- * non-v6-supporting systems.\r
- */\r
- if (address_family == AF_UNSPEC) address_family = AF_INET;\r
-\r
- /*\r
- * Open socket.\r
- */\r
- s = p_socket(address_family, SOCK_STREAM, 0);\r
- ret->s = s;\r
-\r
- if (s == INVALID_SOCKET) {\r
- err = p_WSAGetLastError();\r
- ret->error = winsock_error_string(err);\r
- return (Socket) ret;\r
- }\r
-\r
- ret->oobinline = 0;\r
-\r
- p_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *)&on, sizeof(on));\r
-\r
-#ifndef NO_IPV6\r
- if (address_family == AF_INET6) {\r
- memset(&a6, 0, sizeof(a6));\r
- a6.sin6_family = AF_INET6;\r
- /* FIXME: srcaddr is ignored for IPv6, because I (SGT) don't\r
- * know how to do it. :-)\r
- * (jeroen:) saddr is specified as an address.. eg 2001:db8::1\r
- * Thus we need either a parser that understands [2001:db8::1]:80\r
- * style addresses and/or enhance this to understand hostnames too. */\r
- if (local_host_only)\r
- a6.sin6_addr = in6addr_loopback;\r
- else\r
- a6.sin6_addr = in6addr_any;\r
- a6.sin6_port = p_htons(port);\r
- } else\r
-#endif\r
- {\r
- int got_addr = 0;\r
- a.sin_family = AF_INET;\r
-\r
- /*\r
- * Bind to source address. First try an explicitly\r
- * specified one...\r
- */\r
- if (srcaddr) {\r
- a.sin_addr.s_addr = p_inet_addr(srcaddr);\r
- if (a.sin_addr.s_addr != INADDR_NONE) {\r
- /* Override localhost_only with specified listen addr. */\r
- ret->localhost_only = ipv4_is_loopback(a.sin_addr);\r
- got_addr = 1;\r
- }\r
- }\r
-\r
- /*\r
- * ... and failing that, go with one of the standard ones.\r
- */\r
- if (!got_addr) {\r
- if (local_host_only)\r
- a.sin_addr.s_addr = p_htonl(INADDR_LOOPBACK);\r
- else\r
- a.sin_addr.s_addr = p_htonl(INADDR_ANY);\r
- }\r
-\r
- a.sin_port = p_htons((short)port);\r
- }\r
-#ifndef NO_IPV6\r
- retcode = p_bind(s, (address_family == AF_INET6 ?\r
- (struct sockaddr *) &a6 :\r
- (struct sockaddr *) &a),\r
- (address_family ==\r
- AF_INET6 ? sizeof(a6) : sizeof(a)));\r
-#else\r
- retcode = p_bind(s, (struct sockaddr *) &a, sizeof(a));\r
-#endif\r
- if (retcode != SOCKET_ERROR) {\r
- err = 0;\r
- } else {\r
- err = p_WSAGetLastError();\r
- }\r
-\r
- if (err) {\r
- p_closesocket(s);\r
- ret->error = winsock_error_string(err);\r
- return (Socket) ret;\r
- }\r
-\r
-\r
- if (p_listen(s, SOMAXCONN) == SOCKET_ERROR) {\r
- p_closesocket(s);\r
- ret->error = winsock_error_string(err);\r
- return (Socket) ret;\r
- }\r
-\r
- /* Set up a select mechanism. This could be an AsyncSelect on a\r
- * window, or an EventSelect on an event object. */\r
- errstr = do_select(s, 1);\r
- if (errstr) {\r
- p_closesocket(s);\r
- ret->error = errstr;\r
- return (Socket) ret;\r
- }\r
-\r
- add234(sktree, ret);\r
-\r
-#ifndef NO_IPV6\r
- /*\r
- * If we were given ADDRTYPE_UNSPEC, we must also create an\r
- * IPv6 listening socket and link it to this one.\r
- */\r
- if (address_family == AF_INET && orig_address_family == ADDRTYPE_UNSPEC) {\r
- Actual_Socket other;\r
-\r
- other = (Actual_Socket) sk_newlistener(srcaddr, port, plug,\r
- local_host_only, ADDRTYPE_IPV6);\r
-\r
- if (other) {\r
- if (!other->error) {\r
- other->parent = ret;\r
- ret->child = other;\r
- } else {\r
- sfree(other);\r
- }\r
- }\r
- }\r
-#endif\r
-\r
- return (Socket) ret;\r
-}\r
-\r
-static void sk_tcp_close(Socket sock)\r
-{\r
- extern char *do_select(SOCKET skt, int startup);\r
- Actual_Socket s = (Actual_Socket) sock;\r
-\r
- if (s->child)\r
- sk_tcp_close((Socket)s->child);\r
-\r
- del234(sktree, s);\r
- do_select(s->s, 0);\r
- p_closesocket(s->s);\r
- if (s->addr)\r
- sk_addr_free(s->addr);\r
- sfree(s);\r
-}\r
-\r
-/*\r
- * The function which tries to send on a socket once it's deemed\r
- * writable.\r
- */\r
-void try_send(Actual_Socket s)\r
-{\r
- while (s->sending_oob || bufchain_size(&s->output_data) > 0) {\r
- int nsent;\r
- DWORD err;\r
- void *data;\r
- int len, urgentflag;\r
-\r
- if (s->sending_oob) {\r
- urgentflag = MSG_OOB;\r
- len = s->sending_oob;\r
- data = &s->oobdata;\r
- } else {\r
- urgentflag = 0;\r
- bufchain_prefix(&s->output_data, &data, &len);\r
- }\r
- nsent = p_send(s->s, data, len, urgentflag);\r
- noise_ultralight(nsent);\r
- if (nsent <= 0) {\r
- err = (nsent < 0 ? p_WSAGetLastError() : 0);\r
- if ((err < WSABASEERR && nsent < 0) || err == WSAEWOULDBLOCK) {\r
- /*\r
- * Perfectly normal: we've sent all we can for the moment.\r
- * \r
- * (Some WinSock send() implementations can return\r
- * <0 but leave no sensible error indication -\r
- * WSAGetLastError() is called but returns zero or\r
- * a small number - so we check that case and treat\r
- * it just like WSAEWOULDBLOCK.)\r
- */\r
- s->writable = FALSE;\r
- return;\r
- } else if (nsent == 0 ||\r
- err == WSAECONNABORTED || err == WSAECONNRESET) {\r
- /*\r
- * If send() returns CONNABORTED or CONNRESET, we\r
- * unfortunately can't just call plug_closing(),\r
- * because it's quite likely that we're currently\r
- * _in_ a call from the code we'd be calling back\r
- * to, so we'd have to make half the SSH code\r
- * reentrant. Instead we flag a pending error on\r
- * the socket, to be dealt with (by calling\r
- * plug_closing()) at some suitable future moment.\r
- */\r
- s->pending_error = err;\r
- return;\r
- } else {\r
- /* We're inside the Windows frontend here, so we know\r
- * that the frontend handle is unnecessary. */\r
- logevent(NULL, winsock_error_string(err));\r
- fatalbox("%s", winsock_error_string(err));\r
- }\r
- } else {\r
- if (s->sending_oob) {\r
- if (nsent < len) {\r
- memmove(s->oobdata, s->oobdata+nsent, len-nsent);\r
- s->sending_oob = len - nsent;\r
- } else {\r
- s->sending_oob = 0;\r
- }\r
- } else {\r
- bufchain_consume(&s->output_data, nsent);\r
- }\r
- }\r
- }\r
-}\r
-\r
-static int sk_tcp_write(Socket sock, const char *buf, int len)\r
-{\r
- Actual_Socket s = (Actual_Socket) sock;\r
-\r
- /*\r
- * Add the data to the buffer list on the socket.\r
- */\r
- bufchain_add(&s->output_data, buf, len);\r
-\r
- /*\r
- * Now try sending from the start of the buffer list.\r
- */\r
- if (s->writable)\r
- try_send(s);\r
-\r
- return bufchain_size(&s->output_data);\r
-}\r
-\r
-static int sk_tcp_write_oob(Socket sock, const char *buf, int len)\r
-{\r
- Actual_Socket s = (Actual_Socket) sock;\r
-\r
- /*\r
- * Replace the buffer list on the socket with the data.\r
- */\r
- bufchain_clear(&s->output_data);\r
- assert(len <= sizeof(s->oobdata));\r
- memcpy(s->oobdata, buf, len);\r
- s->sending_oob = len;\r
-\r
- /*\r
- * Now try sending from the start of the buffer list.\r
- */\r
- if (s->writable)\r
- try_send(s);\r
-\r
- return s->sending_oob;\r
-}\r
-\r
-int select_result(WPARAM wParam, LPARAM lParam)\r
-{\r
- int ret, open;\r
- DWORD err;\r
- char buf[20480]; /* nice big buffer for plenty of speed */\r
- Actual_Socket s;\r
- u_long atmark;\r
-\r
- /* wParam is the socket itself */\r
-\r
- if (wParam == 0)\r
- return 1; /* boggle */\r
-\r
- s = find234(sktree, (void *) wParam, cmpforsearch);\r
- if (!s)\r
- return 1; /* boggle */\r
-\r
- if ((err = WSAGETSELECTERROR(lParam)) != 0) {\r
- /*\r
- * An error has occurred on this socket. Pass it to the\r
- * plug.\r
- */\r
- if (s->addr) {\r
- plug_log(s->plug, 1, s->addr, s->port,\r
- winsock_error_string(err), err);\r
- while (s->addr && sk_nextaddr(s->addr, &s->step)) {\r
- err = try_connect(s);\r
- }\r
- }\r
- if (err != 0)\r
- return plug_closing(s->plug, winsock_error_string(err), err, 0);\r
- else\r
- return 1;\r
- }\r
-\r
- noise_ultralight(lParam);\r
-\r
- switch (WSAGETSELECTEVENT(lParam)) {\r
- case FD_CONNECT:\r
- s->connected = s->writable = 1;\r
- /*\r
- * Once a socket is connected, we can stop falling\r
- * back through the candidate addresses to connect\r
- * to.\r
- */\r
- if (s->addr) {\r
- sk_addr_free(s->addr);\r
- s->addr = NULL;\r
- }\r
- break;\r
- case FD_READ:\r
- /* In the case the socket is still frozen, we don't even bother */\r
- if (s->frozen) {\r
- s->frozen_readable = 1;\r
- break;\r
- }\r
-\r
- /*\r
- * We have received data on the socket. For an oobinline\r
- * socket, this might be data _before_ an urgent pointer,\r
- * in which case we send it to the back end with type==1\r
- * (data prior to urgent).\r
- */\r
- if (s->oobinline) {\r
- atmark = 1;\r
- p_ioctlsocket(s->s, SIOCATMARK, &atmark);\r
- /*\r
- * Avoid checking the return value from ioctlsocket(),\r
- * on the grounds that some WinSock wrappers don't\r
- * support it. If it does nothing, we get atmark==1,\r
- * which is equivalent to `no OOB pending', so the\r
- * effect will be to non-OOB-ify any OOB data.\r
- */\r
- } else\r
- atmark = 1;\r
-\r
- ret = p_recv(s->s, buf, sizeof(buf), 0);\r
- noise_ultralight(ret);\r
- if (ret < 0) {\r
- err = p_WSAGetLastError();\r
- if (err == WSAEWOULDBLOCK) {\r
- break;\r
- }\r
- }\r
- if (ret < 0) {\r
- return plug_closing(s->plug, winsock_error_string(err), err,\r
- 0);\r
- } else if (0 == ret) {\r
- return plug_closing(s->plug, NULL, 0, 0);\r
- } else {\r
- return plug_receive(s->plug, atmark ? 0 : 1, buf, ret);\r
- }\r
- break;\r
- case FD_OOB:\r
- /*\r
- * This will only happen on a non-oobinline socket. It\r
- * indicates that we can immediately perform an OOB read\r
- * and get back OOB data, which we will send to the back\r
- * end with type==2 (urgent data).\r
- */\r
- ret = p_recv(s->s, buf, sizeof(buf), MSG_OOB);\r
- noise_ultralight(ret);\r
- if (ret <= 0) {\r
- char *str = (ret == 0 ? "Internal networking trouble" :\r
- winsock_error_string(p_WSAGetLastError()));\r
- /* We're inside the Windows frontend here, so we know\r
- * that the frontend handle is unnecessary. */\r
- logevent(NULL, str);\r
- fatalbox("%s", str);\r
- } else {\r
- return plug_receive(s->plug, 2, buf, ret);\r
- }\r
- break;\r
- case FD_WRITE:\r
- {\r
- int bufsize_before, bufsize_after;\r
- s->writable = 1;\r
- bufsize_before = s->sending_oob + bufchain_size(&s->output_data);\r
- try_send(s);\r
- bufsize_after = s->sending_oob + bufchain_size(&s->output_data);\r
- if (bufsize_after < bufsize_before)\r
- plug_sent(s->plug, bufsize_after);\r
- }\r
- break;\r
- case FD_CLOSE:\r
- /* Signal a close on the socket. First read any outstanding data. */\r
- open = 1;\r
- do {\r
- ret = p_recv(s->s, buf, sizeof(buf), 0);\r
- if (ret < 0) {\r
- err = p_WSAGetLastError();\r
- if (err == WSAEWOULDBLOCK)\r
- break;\r
- return plug_closing(s->plug, winsock_error_string(err),\r
- err, 0);\r
- } else {\r
- if (ret)\r
- open &= plug_receive(s->plug, 0, buf, ret);\r
- else\r
- open &= plug_closing(s->plug, NULL, 0, 0);\r
- }\r
- } while (ret > 0);\r
- return open;\r
- case FD_ACCEPT:\r
- {\r
-#ifdef NO_IPV6\r
- struct sockaddr_in isa;\r
-#else\r
- struct sockaddr_storage isa;\r
-#endif\r
- int addrlen = sizeof(isa);\r
- SOCKET t; /* socket of connection */\r
-\r
- memset(&isa, 0, sizeof(isa));\r
- err = 0;\r
- t = p_accept(s->s,(struct sockaddr *)&isa,&addrlen);\r
- if (t == INVALID_SOCKET)\r
- {\r
- err = p_WSAGetLastError();\r
- if (err == WSATRY_AGAIN)\r
- break;\r
- }\r
-#ifndef NO_IPV6\r
- if (isa.ss_family == AF_INET &&\r
- s->localhost_only &&\r
- !ipv4_is_local_addr(((struct sockaddr_in *)&isa)->sin_addr))\r
-#else\r
- if (s->localhost_only && !ipv4_is_local_addr(isa.sin_addr))\r
-#endif\r
- {\r
- p_closesocket(t); /* dodgy WinSock let nonlocal through */\r
- } else if (plug_accepting(s->plug, (void*)t)) {\r
- p_closesocket(t); /* denied or error */\r
- }\r
- }\r
- }\r
-\r
- return 1;\r
-}\r
-\r
-/*\r
- * Deal with socket errors detected in try_send().\r
- */\r
-void net_pending_errors(void)\r
-{\r
- int i;\r
- Actual_Socket s;\r
-\r
- /*\r
- * This might be a fiddly business, because it's just possible\r
- * that handling a pending error on one socket might cause\r
- * others to be closed. (I can't think of any reason this might\r
- * happen in current SSH implementation, but to maintain\r
- * generality of this network layer I'll assume the worst.)\r
- * \r
- * So what we'll do is search the socket list for _one_ socket\r
- * with a pending error, and then handle it, and then search\r
- * the list again _from the beginning_. Repeat until we make a\r
- * pass with no socket errors present. That way we are\r
- * protected against the socket list changing under our feet.\r
- */\r
-\r
- do {\r
- for (i = 0; (s = index234(sktree, i)) != NULL; i++) {\r
- if (s->pending_error) {\r
- /*\r
- * An error has occurred on this socket. Pass it to the\r
- * plug.\r
- */\r
- plug_closing(s->plug,\r
- winsock_error_string(s->pending_error),\r
- s->pending_error, 0);\r
- break;\r
- }\r
- }\r
- } while (s);\r
-}\r
-\r
-/*\r
- * Each socket abstraction contains a `void *' private field in\r
- * which the client can keep state.\r
- */\r
-static void sk_tcp_set_private_ptr(Socket sock, void *ptr)\r
-{\r
- Actual_Socket s = (Actual_Socket) sock;\r
- s->private_ptr = ptr;\r
-}\r
-\r
-static void *sk_tcp_get_private_ptr(Socket sock)\r
-{\r
- Actual_Socket s = (Actual_Socket) sock;\r
- return s->private_ptr;\r
-}\r
-\r
-/*\r
- * Special error values are returned from sk_namelookup and sk_new\r
- * if there's a problem. These functions extract an error message,\r
- * or return NULL if there's no problem.\r
- */\r
-const char *sk_addr_error(SockAddr addr)\r
-{\r
- return addr->error;\r
-}\r
-static const char *sk_tcp_socket_error(Socket sock)\r
-{\r
- Actual_Socket s = (Actual_Socket) sock;\r
- return s->error;\r
-}\r
-\r
-static void sk_tcp_set_frozen(Socket sock, int is_frozen)\r
-{\r
- Actual_Socket s = (Actual_Socket) sock;\r
- if (s->frozen == is_frozen)\r
- return;\r
- s->frozen = is_frozen;\r
- if (!is_frozen) {\r
- do_select(s->s, 1);\r
- if (s->frozen_readable) {\r
- char c;\r
- p_recv(s->s, &c, 1, MSG_PEEK);\r
- }\r
- }\r
- s->frozen_readable = 0;\r
-}\r
-\r
-void socket_reselect_all(void)\r
-{\r
- Actual_Socket s;\r
- int i;\r
-\r
- for (i = 0; (s = index234(sktree, i)) != NULL; i++) {\r
- if (!s->frozen)\r
- do_select(s->s, 1);\r
- }\r
-}\r
-\r
-/*\r
- * For Plink: enumerate all sockets currently active.\r
- */\r
-SOCKET first_socket(int *state)\r
-{\r
- Actual_Socket s;\r
- *state = 0;\r
- s = index234(sktree, (*state)++);\r
- return s ? s->s : INVALID_SOCKET;\r
-}\r
-\r
-SOCKET next_socket(int *state)\r
-{\r
- Actual_Socket s = index234(sktree, (*state)++);\r
- return s ? s->s : INVALID_SOCKET;\r
-}\r
-\r
-extern int socket_writable(SOCKET skt)\r
-{\r
- Actual_Socket s = find234(sktree, (void *)skt, cmpforsearch);\r
-\r
- if (s)\r
- return bufchain_size(&s->output_data) > 0;\r
- else\r
- return 0;\r
-}\r
-\r
-int net_service_lookup(char *service)\r
-{\r
- struct servent *se;\r
- se = p_getservbyname(service, NULL);\r
- if (se != NULL)\r
- return p_ntohs(se->s_port);\r
- else\r
- return 0;\r
-}\r
-\r
-char *get_hostname(void)\r
-{\r
- int len = 128;\r
- char *hostname = NULL;\r
- do {\r
- len *= 2;\r
- hostname = sresize(hostname, len, char);\r
- if (p_gethostname(hostname, len) < 0) {\r
- sfree(hostname);\r
- hostname = NULL;\r
- break;\r
- }\r
- } while (strlen(hostname) >= (size_t)(len-1));\r
- return hostname;\r
-}\r
-\r
-SockAddr platform_get_x11_unix_address(const char *display, int displaynum,\r
- char **canonicalname)\r
-{\r
- SockAddr ret = snew(struct SockAddr_tag);\r
- memset(ret, 0, sizeof(struct SockAddr_tag));\r
- ret->error = "unix sockets not supported on this platform";\r
- ret->refcount = 1;\r
- return ret;\r
-}\r
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