diff options
Diffstat (limited to 'generic/tclIOSock.c')
| -rw-r--r-- | generic/tclIOSock.c | 231 |
1 files changed, 199 insertions, 32 deletions
diff --git a/generic/tclIOSock.c b/generic/tclIOSock.c index 82d10a8..694501f 100644 --- a/generic/tclIOSock.c +++ b/generic/tclIOSock.c @@ -1,32 +1,34 @@ -/* +/* * tclIOSock.c -- * * Common routines used by all socket based channel types. * * Copyright (c) 1995-1997 Sun Microsystems, Inc. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclIOSock.c,v 1.5 2000/03/31 08:52:04 hobbs Exp $ + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tclInt.h" -#include "tclPort.h" + +#if defined(_WIN32) && defined(UNICODE) +/* On Windows, we always need the ASCII version. */ +# undef gai_strerror +# define gai_strerror gai_strerrorA +#endif /* *--------------------------------------------------------------------------- * * TclSockGetPort -- * - * Maps from a string, which could be a service name, to a port. - * Used by socket creation code to get port numbers and resolve - * registered service names to port numbers. + * Maps from a string, which could be a service name, to a port. Used by + * socket creation code to get port numbers and resolve registered + * service names to port numbers. * * Results: - * A standard Tcl result. On success, the port number is returned - * in portPtr. On failure, an error message is left in the interp's - * result. + * A standard Tcl result. On success, the port number is returned in + * portPtr. On failure, an error message is left in the interp's result. * * Side effects: * None. @@ -35,21 +37,21 @@ */ int -TclSockGetPort(interp, string, proto, portPtr) - Tcl_Interp *interp; - char *string; /* Integer or service name */ - char *proto; /* "tcp" or "udp", typically */ - int *portPtr; /* Return port number */ +TclSockGetPort( + Tcl_Interp *interp, + const char *string, /* Integer or service name */ + const char *proto, /* "tcp" or "udp", typically */ + int *portPtr) /* Return port number */ { struct servent *sp; /* Protocol info for named services */ Tcl_DString ds; - char *native; + const char *native; if (Tcl_GetInt(NULL, string, portPtr) != TCL_OK) { /* * Don't bother translating 'proto' to native. */ - + native = Tcl_UtfToExternalDString(NULL, string, -1, &ds); sp = getservbyname(native, proto); /* INTL: Native. */ Tcl_DStringFree(&ds); @@ -62,8 +64,8 @@ TclSockGetPort(interp, string, proto, portPtr) return TCL_ERROR; } if (*portPtr > 0xFFFF) { - Tcl_AppendResult(interp, "couldn't open socket: port number too high", - (char *) NULL); + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "couldn't open socket: port number too high", -1)); return TCL_ERROR; } return TCL_OK; @@ -85,28 +87,193 @@ TclSockGetPort(interp, string, proto, portPtr) *---------------------------------------------------------------------- */ +#if !defined(_WIN32) && !defined(__CYGWIN__) +# define SOCKET int +#endif + int -TclSockMinimumBuffers(sock, size) - int sock; /* Socket file descriptor */ - int size; /* Minimum buffer size */ +TclSockMinimumBuffers( + void *sock, /* Socket file descriptor */ + int size) /* Minimum buffer size */ { int current; - /* - * Should be socklen_t, but HP10.20 (g)cc chokes - */ - size_t len; + socklen_t len; len = sizeof(int); - getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)¤t, &len); + getsockopt((SOCKET)(size_t) sock, SOL_SOCKET, SO_SNDBUF, + (char *) ¤t, &len); if (current < size) { len = sizeof(int); - setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&size, len); + setsockopt((SOCKET)(size_t) sock, SOL_SOCKET, SO_SNDBUF, + (char *) &size, len); } len = sizeof(int); - getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)¤t, &len); + getsockopt((SOCKET)(size_t) sock, SOL_SOCKET, SO_RCVBUF, + (char *) ¤t, &len); if (current < size) { len = sizeof(int); - setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len); + setsockopt((SOCKET)(size_t) sock, SOL_SOCKET, SO_RCVBUF, + (char *) &size, len); } return TCL_OK; } + +/* + *---------------------------------------------------------------------- + * + * TclCreateSocketAddress -- + * + * This function initializes a sockaddr structure for a host and port. + * + * Results: + * 1 if the host was valid, 0 if the host could not be converted to an IP + * address. + * + * Side effects: + * Fills in the *sockaddrPtr structure. + * + *---------------------------------------------------------------------- + */ + +int +TclCreateSocketAddress( + Tcl_Interp *interp, /* Interpreter for querying + * the desired socket family */ + struct addrinfo **addrlist, /* Socket address list */ + const char *host, /* Host. NULL implies INADDR_ANY */ + int port, /* Port number */ + int willBind, /* Is this an address to bind() to or + * to connect() to? */ + const char **errorMsgPtr) /* Place to store the error message + * detail, if available. */ +{ + struct addrinfo hints; + struct addrinfo *p; + struct addrinfo *v4head = NULL, *v4ptr = NULL; + struct addrinfo *v6head = NULL, *v6ptr = NULL; + char *native = NULL, portbuf[TCL_INTEGER_SPACE], *portstring; + const char *family = NULL; + Tcl_DString ds; + int result, i; + + if (host != NULL) { + native = Tcl_UtfToExternalDString(NULL, host, -1, &ds); + } + + /* + * Workaround for OSX's apparent inability to resolve "localhost", "0" + * when the loopback device is the only available network interface. + */ + if (host != NULL && port == 0) { + portstring = NULL; + } else { + TclFormatInt(portbuf, port); + portstring = portbuf; + } + + (void) memset(&hints, 0, sizeof(hints)); + hints.ai_family = AF_UNSPEC; + + /* + * Magic variable to enforce a certain address family - to be superseded + * by a TIP that adds explicit switches to [socket] + */ + + if (interp != NULL) { + family = Tcl_GetVar(interp, "::tcl::unsupported::socketAF", 0); + if (family != NULL) { + if (strcmp(family, "inet") == 0) { + hints.ai_family = AF_INET; + } else if (strcmp(family, "inet6") == 0) { + hints.ai_family = AF_INET6; + } + } + } + + hints.ai_socktype = SOCK_STREAM; + +#if 0 + /* + * We found some problems when using AI_ADDRCONFIG, e.g. on systems that + * have no networking besides the loopback interface and want to resolve + * localhost. See [Bugs 3385024, 3382419, 3382431]. As the advantage of + * using AI_ADDRCONFIG in situations where it works, is probably low, + * we'll leave it out for now. After all, it is just an optimisation. + * + * Missing on: OpenBSD, NetBSD. + * Causes failure when used on AIX 5.1 and HP-UX + */ + +#if defined(AI_ADDRCONFIG) && !defined(_AIX) && !defined(__hpux) + hints.ai_flags |= AI_ADDRCONFIG; +#endif /* AI_ADDRCONFIG && !_AIX && !__hpux */ +#endif /* 0 */ + + if (willBind) { + hints.ai_flags |= AI_PASSIVE; + } + + result = getaddrinfo(native, portstring, &hints, addrlist); + + if (host != NULL) { + Tcl_DStringFree(&ds); + } + + if (result != 0) { + *errorMsgPtr = +#ifdef EAI_SYSTEM /* Doesn't exist on Windows */ + (result == EAI_SYSTEM) ? Tcl_PosixError(interp) : +#endif /* EAI_SYSTEM */ + gai_strerror(result); + return 0; + } + + /* + * Put IPv4 addresses before IPv6 addresses to maximize backwards + * compatibility of [fconfigure -sockname] output. + * + * There might be more elegant/efficient ways to do this. + */ + if (willBind) { + for (p = *addrlist; p != NULL; p = p->ai_next) { + if (p->ai_family == AF_INET) { + if (v4head == NULL) { + v4head = p; + } else { + v4ptr->ai_next = p; + } + v4ptr = p; + } else { + if (v6head == NULL) { + v6head = p; + } else { + v6ptr->ai_next = p; + } + v6ptr = p; + } + } + *addrlist = NULL; + if (v6head != NULL) { + *addrlist = v6head; + v6ptr->ai_next = NULL; + } + if (v4head != NULL) { + v4ptr->ai_next = *addrlist; + *addrlist = v4head; + } + } + i = 0; + for (p = *addrlist; p != NULL; p = p->ai_next) { + i++; + } + + return 1; +} + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |