ICE (work in progress): use single socket for all candidates in component, and implemented IP interface enumeration on Win32

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@1104 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 136 insertions, 0 deletions

diff --git a/pjlib/src/pj/ip_helper_win32.c b/pjlib/src/pj/ip_helper_win32.c
new file mode 100644
index 00000000..094cfc9f
--- /dev/null
+++ b/pjlib/src/pj/ip_helper_win32.c
@@ -0,0 +1,136 @@
+/* $Id$ */
+/* 
+ * Copyright (C)2003-2007 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+/* PMIB_ICMP_EX is not declared in VC6, causing error */
+#if defined(_MSC_VER) && _MSC_VER < 1400
+#   define PMIB_ICMP_EX void*
+#endif
+#include <Iphlpapi.h>
+
+#include <pj/ip_helper.h>
+#include <pj/assert.h>
+#include <pj/errno.h>
+#include <pj/string.h>
+
+
+/*
+ * Enumerate the local IP interface currently active in the host.
+ */
+PJ_DEF(pj_status_t) pj_enum_ip_interface(unsigned *p_cnt,
+					 pj_in_addr ifs[])
+{
+    /* Provide enough buffer or otherwise it will fail with 
+     * error 22 ("Not Enough Buffer") error.
+     */
+    MIB_IPADDRTABLE ipTabBuff[4];
+    MIB_IPADDRTABLE *pTab;
+    ULONG tabSize;
+    unsigned i, count;
+    DWORD rc;
+
+    PJ_ASSERT_RETURN(p_cnt && ifs, PJ_EINVAL);
+
+    pTab = ipTabBuff;
+
+    /* Get IP address table */
+    tabSize = sizeof(ipTabBuff);
+    rc = GetIpAddrTable(ipTabBuff, &tabSize, FALSE);
+    if (rc != NO_ERROR)
+	return PJ_RETURN_OS_ERROR(rc);
+
+    /* Reset result */
+    pj_bzero(ifs, sizeof(ifs[0]) * (*p_cnt));
+
+    /* Now fill out the entries */
+    count = (pTab->dwNumEntries < *p_cnt) ? pTab->dwNumEntries : *p_cnt;
+    for (i=0; i<count; ++i) {
+	ifs[i].s_addr = pTab->table[i].dwAddr;
+    }
+
+    *p_cnt = count;
+
+    return PJ_SUCCESS;
+
+}
+
+
+/*
+ * Enumerate the IP routing table for this host.
+ */
+PJ_DEF(pj_status_t) pj_enum_ip_route(unsigned *p_cnt,
+				     pj_ip_route_entry routes[])
+{
+    MIB_IPADDRTABLE ipTabBuff[4];
+    MIB_IPADDRTABLE *pIpTab;
+    MIB_IPFORWARDTABLE rtabBuff[4];
+    MIB_IPFORWARDTABLE *prTab;
+    ULONG tabSize;
+    unsigned i, count;
+    DWORD rc;
+
+    PJ_ASSERT_RETURN(p_cnt && routes, PJ_EINVAL);
+
+    pIpTab = ipTabBuff;
+    prTab = rtabBuff;
+
+    /* First get IP address table */
+    tabSize = sizeof(ipTabBuff);
+    rc = GetIpAddrTable(ipTabBuff, &tabSize, FALSE);
+    if (rc != NO_ERROR)
+	return PJ_RETURN_OS_ERROR(rc);
+
+    /* Next get IP route table */
+    tabSize = sizeof(rtabBuff);
+    rc = GetIpForwardTable(rtabBuff, &tabSize, 1);
+    if (rc != NO_ERROR)
+	return PJ_RETURN_OS_ERROR(rc);
+
+    /* Reset routes */
+    pj_bzero(routes, sizeof(routes[0]) * (*p_cnt));
+
+    /* Now fill out the route entries */
+    count = (prTab->dwNumEntries < *p_cnt) ? prTab->dwNumEntries : *p_cnt;
+    *p_cnt = 0;
+    for (i=0; i<count; ++i) {
+	unsigned j;
+
+	/* Find interface entry */
+	for (j=0; j<pIpTab->dwNumEntries; ++j) {
+	    if (pIpTab->table[j].dwIndex == prTab->table[i].dwForwardIfIndex)
+		break;
+	}
+
+	if (j==pIpTab->dwNumEntries)
+	    continue;	/* Interface not found */
+
+	routes[*p_cnt].ipv4.if_addr.s_addr = pIpTab->table[j].dwAddr;
+	routes[*p_cnt].ipv4.dst_addr.s_addr = prTab->table[i].dwForwardDest;
+	routes[*p_cnt].ipv4.mask.s_addr = prTab->table[i].dwForwardMask;
+
+	(*p_cnt)++;
+    }
+
+    return PJ_SUCCESS;
+}
+
+
+