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-rw-r--r--generic/tclIOSock.c147
1 files changed, 146 insertions, 1 deletions
diff --git a/generic/tclIOSock.c b/generic/tclIOSock.c
index 6887b0c..15de01e 100644
--- a/generic/tclIOSock.c
+++ b/generic/tclIOSock.c
@@ -8,7 +8,7 @@
* 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 1.11 2007/02/20 23:24:04 nijtmans Exp $
+ * RCS: @(#) $Id: tclIOSock.c,v 1.12 2010/09/28 15:13:54 rmax Exp $
*/
#include "tclInt.h"
@@ -107,6 +107,151 @@ TclSockMinimumBuffers(
}
/*
+ *----------------------------------------------------------------------
+ *
+ * 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, portstring[TCL_INTEGER_SPACE];
+ const char *family;
+ Tcl_DString ds;
+ int result, i;
+
+ TclFormatInt(portstring, port);
+
+ if (host != NULL) {
+ native = Tcl_UtfToExternalDString(NULL, host, -1, &ds);
+ }
+
+ (void) memset(&hints, 0, sizeof(hints));
+
+ hints.ai_family = AF_UNSPEC;
+ /* Magic variable to enforce a certain address family */
+ 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 defined(AI_ADDRCONFIG) && !defined(_AIX)
+ /* Missing on: OpenBSD, NetBSD. Causes failure when used on AIX 5.1 */
+ hints.ai_flags |= AI_ADDRCONFIG;
+#endif
+ if (willBind) {
+ hints.ai_flags |= AI_PASSIVE;
+ }
+
+ result = getaddrinfo(native, portstring, &hints, addrlist);
+
+ if (host != NULL) {
+ Tcl_DStringFree(&ds);
+ }
+
+ if (result != 0) {
+ goto error;
+ }
+
+ /*
+ * 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;
+
+ /*
+ * Ought to use gai_strerror() here...
+ */
+
+error:
+ switch (result) {
+ case EAI_NONAME:
+ case EAI_SERVICE:
+#if defined(EAI_ADDRFAMILY) && EAI_ADDRFAMILY != EAI_NONAME
+ case EAI_ADDRFAMILY:
+#endif
+#if defined(EAI_NODATA) && EAI_NODATA != EAI_NONAME
+ case EAI_NODATA:
+#endif
+ *errorMsgPtr = gai_strerror(result);
+ errno = EHOSTUNREACH;
+ return 0;
+#ifdef EAI_SYSTEM
+ case EAI_SYSTEM:
+ return 0;
+#endif
+ default:
+ *errorMsgPtr = gai_strerror(result);
+ errno = ENXIO;
+ return 0;
+ }
+}
+
+/*
* Local Variables:
* mode: c
* c-basic-offset: 4