diff options
Diffstat (limited to 'libcurl/src/lib/if2ip.c')
| -rw-r--r-- | libcurl/src/lib/if2ip.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/libcurl/src/lib/if2ip.c b/libcurl/src/lib/if2ip.c new file mode 100644 index 0000000..c4f6e70 --- /dev/null +++ b/libcurl/src/lib/if2ip.c @@ -0,0 +1,271 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#endif
+#ifdef HAVE_NET_IF_H
+# include <net/if.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+# include <sys/ioctl.h>
+#endif
+#ifdef HAVE_NETDB_H
+# include <netdb.h>
+#endif
+#ifdef HAVE_SYS_SOCKIO_H
+# include <sys/sockio.h>
+#endif
+#ifdef HAVE_IFADDRS_H
+# include <ifaddrs.h>
+#endif
+#ifdef HAVE_STROPTS_H
+# include <stropts.h>
+#endif
+#ifdef __VMS
+# include <inet.h>
+#endif
+
+#include "inet_ntop.h"
+#include "strequal.h"
+#include "if2ip.h"
+#include "curl_printf.h"
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/* ------------------------------------------------------------------ */
+
+/* Return the scope of the given address. */
+CURL_STATIC unsigned int Curl_ipv6_scope(const struct sockaddr *sa)
+{
+#ifndef ENABLE_IPV6
+ (void) sa;
+#else
+ if(sa->sa_family == AF_INET6) {
+ const struct sockaddr_in6 * sa6 = (const struct sockaddr_in6 *) sa;
+ const unsigned char * b = sa6->sin6_addr.s6_addr;
+ unsigned short w = (unsigned short) ((b[0] << 8) | b[1]);
+
+ switch(w & 0xFFC0) {
+ case 0xFE80:
+ return IPV6_SCOPE_LINKLOCAL;
+ case 0xFEC0:
+ return IPV6_SCOPE_SITELOCAL;
+ case 0x0000:
+ w = b[1] | b[2] | b[3] | b[4] | b[5] | b[6] | b[7] | b[8] | b[9] |
+ b[10] | b[11] | b[12] | b[13] | b[14];
+ if(w || b[15] != 0x01)
+ break;
+ return IPV6_SCOPE_NODELOCAL;
+ default:
+ break;
+ }
+ }
+#endif
+
+ return IPV6_SCOPE_GLOBAL;
+}
+
+
+#if defined(HAVE_GETIFADDRS)
+
+CURL_STATIC bool Curl_if_is_interface_name(const char *interf)
+{
+ bool result = FALSE;
+
+ struct ifaddrs *iface, *head;
+
+ if(getifaddrs(&head) >= 0) {
+ for(iface=head; iface != NULL; iface=iface->ifa_next) {
+ if(curl_strequal(iface->ifa_name, interf)) {
+ result = TRUE;
+ break;
+ }
+ }
+ freeifaddrs(head);
+ }
+ return result;
+}
+
+CURL_STATIC if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
+ unsigned int remote_scope_id, const char *interf,
+ char *buf, int buf_size)
+{
+ struct ifaddrs *iface, *head;
+ if2ip_result_t res = IF2IP_NOT_FOUND;
+
+#ifndef ENABLE_IPV6
+ (void) remote_scope;
+
+#ifndef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
+ (void) remote_scope_id;
+#endif
+
+#endif
+
+ if(getifaddrs(&head) >= 0) {
+ for(iface = head; iface != NULL; iface=iface->ifa_next) {
+ if(iface->ifa_addr != NULL) {
+ if(iface->ifa_addr->sa_family == af) {
+ if(curl_strequal(iface->ifa_name, interf)) {
+ void *addr;
+ char *ip;
+ char scope[12] = "";
+ char ipstr[64];
+#ifdef ENABLE_IPV6
+ if(af == AF_INET6) {
+ unsigned int scopeid = 0;
+ unsigned int ifscope = Curl_ipv6_scope(iface->ifa_addr);
+
+ if(ifscope != remote_scope) {
+ /* We are interested only in interface addresses whose
+ scope matches the remote address we want to
+ connect to: global for global, link-local for
+ link-local, etc... */
+ if(res == IF2IP_NOT_FOUND) res = IF2IP_AF_NOT_SUPPORTED;
+ continue;
+ }
+
+ addr = &((struct sockaddr_in6 *)iface->ifa_addr)->sin6_addr;
+#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
+ /* Include the scope of this interface as part of the address */
+ scopeid =
+ ((struct sockaddr_in6 *)iface->ifa_addr)->sin6_scope_id;
+
+ /* If given, scope id should match. */
+ if(remote_scope_id && scopeid != remote_scope_id) {
+ if(res == IF2IP_NOT_FOUND)
+ res = IF2IP_AF_NOT_SUPPORTED;
+
+ continue;
+ }
+#endif
+ if(scopeid)
+ snprintf(scope, sizeof(scope), "%%%u", scopeid);
+ }
+ else
+#endif
+ addr = &((struct sockaddr_in *)iface->ifa_addr)->sin_addr;
+ res = IF2IP_FOUND;
+ ip = (char *) Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr));
+ snprintf(buf, buf_size, "%s%s", ip, scope);
+ break;
+ }
+ }
+ else if((res == IF2IP_NOT_FOUND) &&
+ curl_strequal(iface->ifa_name, interf)) {
+ res = IF2IP_AF_NOT_SUPPORTED;
+ }
+ }
+ }
+
+ freeifaddrs(head);
+ }
+
+ return res;
+}
+
+#elif defined(HAVE_IOCTL_SIOCGIFADDR)
+
+CURL_STATIC bool Curl_if_is_interface_name(const char *interf)
+{
+ /* This is here just to support the old interfaces */
+ char buf[256];
+
+ return (Curl_if2ip(AF_INET, 0 /* unused */, 0, interf, buf, sizeof(buf)) ==
+ IF2IP_NOT_FOUND) ? FALSE : TRUE;
+}
+
+CURL_STATIC if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
+ unsigned int remote_scope_id, const char *interf,
+ char *buf, int buf_size)
+{
+ struct ifreq req;
+ struct in_addr in;
+ struct sockaddr_in *s;
+ curl_socket_t dummy;
+ size_t len;
+
+ (void)remote_scope;
+ (void)remote_scope_id;
+
+ if(!interf || (af != AF_INET))
+ return IF2IP_NOT_FOUND;
+
+ len = strlen(interf);
+ if(len >= sizeof(req.ifr_name))
+ return IF2IP_NOT_FOUND;
+
+ dummy = socket(AF_INET, SOCK_STREAM, 0);
+ if(CURL_SOCKET_BAD == dummy)
+ return IF2IP_NOT_FOUND;
+
+ memset(&req, 0, sizeof(req));
+ memcpy(req.ifr_name, interf, len+1);
+ req.ifr_addr.sa_family = AF_INET;
+
+ if(ioctl(dummy, SIOCGIFADDR, &req) < 0) {
+ sclose(dummy);
+ /* With SIOCGIFADDR, we cannot tell the difference between an interface
+ that does not exist and an interface that has no address of the
+ correct family. Assume the interface does not exist */
+ return IF2IP_NOT_FOUND;
+ }
+
+ s = (struct sockaddr_in *)&req.ifr_addr;
+ memcpy(&in, &s->sin_addr, sizeof(in));
+ Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
+
+ sclose(dummy);
+ return IF2IP_FOUND;
+}
+
+#else
+
+CURL_STATIC bool Curl_if_is_interface_name(const char *interf)
+{
+ (void) interf;
+
+ return FALSE;
+}
+
+CURL_STATIC if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
+ unsigned int remote_scope_id, const char *interf,
+ char *buf, int buf_size)
+{
+ (void) af;
+ (void) remote_scope;
+ (void) remote_scope_id;
+ (void) interf;
+ (void) buf;
+ (void) buf_size;
+ return IF2IP_NOT_FOUND;
+}
+
+#endif
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