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-rw-r--r--generic/tclIOSock.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/generic/tclIOSock.c b/generic/tclIOSock.c
new file mode 100644
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--- /dev/null
+++ b/generic/tclIOSock.c
@@ -0,0 +1,330 @@
+/*
+ * 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.
+ */
+
+#include "tclInt.h"
+
+#if defined(_WIN32) && defined(UNICODE)
+/*
+ * On Windows, we need to do proper Unicode->UTF-8 conversion.
+ */
+
+typedef struct {
+ int initialized;
+ Tcl_DString errorMsg; /* UTF-8 encoded error-message */
+} ThreadSpecificData;
+static Tcl_ThreadDataKey dataKey;
+
+#undef gai_strerror
+static const char *
+gai_strerror(
+ int code)
+{
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+
+ if (tsdPtr->initialized) {
+ Tcl_DStringFree(&tsdPtr->errorMsg);
+ } else {
+ tsdPtr->initialized = 1;
+ }
+ Tcl_WinTCharToUtf(gai_strerrorW(code), -1, &tsdPtr->errorMsg);
+ return Tcl_DStringValue(&tsdPtr->errorMsg);
+}
+#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.
+ *
+ * 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.
+ *
+ * Side effects:
+ * None.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+int
+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;
+ 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);
+ if (sp != NULL) {
+ *portPtr = ntohs((unsigned short) sp->s_port);
+ return TCL_OK;
+ }
+ }
+ if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ if (*portPtr > 0xFFFF) {
+ Tcl_SetObjResult(interp, Tcl_NewStringObj(
+ "couldn't open socket: port number too high", -1));
+ return TCL_ERROR;
+ }
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclSockMinimumBuffers --
+ *
+ * Ensure minimum buffer sizes (non zero).
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * Sets SO_SNDBUF and SO_RCVBUF sizes.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#if !defined(_WIN32) && !defined(__CYGWIN__)
+# define SOCKET int
+#endif
+
+int
+TclSockMinimumBuffers(
+ void *sock, /* Socket file descriptor */
+ int size) /* Minimum buffer size */
+{
+ int current;
+ socklen_t len;
+
+ len = sizeof(int);
+ getsockopt((SOCKET)(size_t) sock, SOL_SOCKET, SO_SNDBUF,
+ (char *) &current, &len);
+ if (current < size) {
+ len = sizeof(int);
+ setsockopt((SOCKET)(size_t) sock, SOL_SOCKET, SO_SNDBUF,
+ (char *) &size, len);
+ }
+ len = sizeof(int);
+ getsockopt((SOCKET)(size_t) sock, SOL_SOCKET, SO_RCVBUF,
+ (char *) &current, &len);
+ if (current < size) {
+ len = sizeof(int);
+ 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;
+
+ 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_GetVar2(interp, "::tcl::unsupported::socketAF", NULL, 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 is probably low even in situations where it works,
+ * 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;
+ }
+ }
+ return 1;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_OpenTcpServer --
+ *
+ * Opens a TCP server socket and creates a channel around it.
+ *
+ * Results:
+ * The channel or NULL if failed. If an error occurred, an error message
+ * is left in the interp's result if interp is not NULL.
+ *
+ * Side effects:
+ * Opens a server socket and creates a new channel.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Channel
+Tcl_OpenTcpServer(
+ Tcl_Interp *interp,
+ int port,
+ const char *host,
+ Tcl_TcpAcceptProc *acceptProc,
+ ClientData callbackData)
+{
+ char portbuf[TCL_INTEGER_SPACE];
+
+ TclFormatInt(portbuf, port);
+ return Tcl_OpenTcpServerEx(interp, portbuf, host, TCL_TCPSERVER_REUSEADDR,
+ acceptProc, callbackData);
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
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