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272 lines
7.2 KiB
272 lines
7.2 KiB
/*************************************************************************** |
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* _ _ ____ _ |
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* Project ___| | | | _ \| | |
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* / __| | | | |_) | | |
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* | (__| |_| | _ <| |___ |
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* \___|\___/|_| \_\_____| |
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* |
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* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al. |
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* |
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* This software is licensed as described in the file COPYING, which |
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* you should have received as part of this distribution. The terms |
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* are also available at https://curl.haxx.se/docs/copyright.html. |
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* |
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell |
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* copies of the Software, and permit persons to whom the Software is |
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* furnished to do so, under the terms of the COPYING file. |
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* |
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
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* KIND, either express or implied. |
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* |
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***************************************************************************/ |
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#include "curl_setup.h" |
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#ifdef HAVE_NETINET_IN_H |
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# include <netinet/in.h> |
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#endif |
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#ifdef HAVE_ARPA_INET_H |
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# include <arpa/inet.h> |
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#endif |
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#ifdef HAVE_NET_IF_H |
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# include <net/if.h> |
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#endif |
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#ifdef HAVE_SYS_IOCTL_H |
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# include <sys/ioctl.h> |
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#endif |
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#ifdef HAVE_NETDB_H |
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# include <netdb.h> |
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#endif |
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#ifdef HAVE_SYS_SOCKIO_H |
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# include <sys/sockio.h> |
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#endif |
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#ifdef HAVE_IFADDRS_H |
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# include <ifaddrs.h> |
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#endif |
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#ifdef HAVE_STROPTS_H |
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# include <stropts.h> |
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#endif |
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#ifdef __VMS |
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# include <inet.h> |
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#endif |
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#include "inet_ntop.h" |
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#include "strcase.h" |
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#include "if2ip.h" |
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/* The last 3 #include files should be in this order */ |
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#include "curl_printf.h" |
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#include "curl_memory.h" |
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#include "memdebug.h" |
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/* ------------------------------------------------------------------ */ |
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/* Return the scope of the given address. */ |
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unsigned int Curl_ipv6_scope(const struct sockaddr *sa) |
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{ |
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#ifndef ENABLE_IPV6 |
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(void) sa; |
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#else |
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if(sa->sa_family == AF_INET6) { |
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const struct sockaddr_in6 * sa6 = (const struct sockaddr_in6 *)(void *) sa; |
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const unsigned char *b = sa6->sin6_addr.s6_addr; |
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unsigned short w = (unsigned short) ((b[0] << 8) | b[1]); |
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switch(w & 0xFFC0) { |
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case 0xFE80: |
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return IPV6_SCOPE_LINKLOCAL; |
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case 0xFEC0: |
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return IPV6_SCOPE_SITELOCAL; |
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case 0x0000: |
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w = b[1] | b[2] | b[3] | b[4] | b[5] | b[6] | b[7] | b[8] | b[9] | |
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b[10] | b[11] | b[12] | b[13] | b[14]; |
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if(w || b[15] != 0x01) |
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break; |
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return IPV6_SCOPE_NODELOCAL; |
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default: |
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break; |
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} |
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} |
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#endif |
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return IPV6_SCOPE_GLOBAL; |
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} |
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#if defined(HAVE_GETIFADDRS) |
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bool Curl_if_is_interface_name(const char *interf) |
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{ |
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bool result = FALSE; |
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struct ifaddrs *iface, *head; |
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if(getifaddrs(&head) >= 0) { |
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for(iface=head; iface != NULL; iface=iface->ifa_next) { |
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if(strcasecompare(iface->ifa_name, interf)) { |
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result = TRUE; |
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break; |
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} |
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} |
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freeifaddrs(head); |
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} |
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return result; |
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} |
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if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, |
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unsigned int remote_scope_id, const char *interf, |
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char *buf, int buf_size) |
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{ |
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struct ifaddrs *iface, *head; |
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if2ip_result_t res = IF2IP_NOT_FOUND; |
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#ifndef ENABLE_IPV6 |
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(void) remote_scope; |
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#ifndef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID |
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(void) remote_scope_id; |
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#endif |
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#endif |
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if(getifaddrs(&head) >= 0) { |
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for(iface = head; iface != NULL; iface=iface->ifa_next) { |
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if(iface->ifa_addr != NULL) { |
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if(iface->ifa_addr->sa_family == af) { |
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if(strcasecompare(iface->ifa_name, interf)) { |
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void *addr; |
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char *ip; |
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char scope[12] = ""; |
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char ipstr[64]; |
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#ifdef ENABLE_IPV6 |
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if(af == AF_INET6) { |
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unsigned int scopeid = 0; |
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unsigned int ifscope = Curl_ipv6_scope(iface->ifa_addr); |
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if(ifscope != remote_scope) { |
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/* We are interested only in interface addresses whose |
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scope matches the remote address we want to |
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connect to: global for global, link-local for |
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link-local, etc... */ |
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if(res == IF2IP_NOT_FOUND) res = IF2IP_AF_NOT_SUPPORTED; |
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continue; |
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} |
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addr = |
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&((struct sockaddr_in6 *)(void *)iface->ifa_addr)->sin6_addr; |
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#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID |
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/* Include the scope of this interface as part of the address */ |
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scopeid = ((struct sockaddr_in6 *)(void *)iface->ifa_addr) |
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->sin6_scope_id; |
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/* If given, scope id should match. */ |
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if(remote_scope_id && scopeid != remote_scope_id) { |
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if(res == IF2IP_NOT_FOUND) |
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res = IF2IP_AF_NOT_SUPPORTED; |
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continue; |
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} |
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#endif |
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if(scopeid) |
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snprintf(scope, sizeof(scope), "%%%u", scopeid); |
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} |
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else |
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#endif |
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addr = |
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&((struct sockaddr_in *)(void *)iface->ifa_addr)->sin_addr; |
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res = IF2IP_FOUND; |
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ip = (char *) Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr)); |
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snprintf(buf, buf_size, "%s%s", ip, scope); |
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break; |
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} |
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} |
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else if((res == IF2IP_NOT_FOUND) && |
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strcasecompare(iface->ifa_name, interf)) { |
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res = IF2IP_AF_NOT_SUPPORTED; |
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} |
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} |
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} |
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freeifaddrs(head); |
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} |
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return res; |
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} |
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#elif defined(HAVE_IOCTL_SIOCGIFADDR) |
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bool Curl_if_is_interface_name(const char *interf) |
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{ |
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/* This is here just to support the old interfaces */ |
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char buf[256]; |
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return (Curl_if2ip(AF_INET, 0 /* unused */, 0, interf, buf, sizeof(buf)) == |
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IF2IP_NOT_FOUND) ? FALSE : TRUE; |
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} |
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if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, |
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unsigned int remote_scope_id, const char *interf, |
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char *buf, int buf_size) |
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{ |
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struct ifreq req; |
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struct in_addr in; |
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struct sockaddr_in *s; |
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curl_socket_t dummy; |
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size_t len; |
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(void)remote_scope; |
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(void)remote_scope_id; |
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if(!interf || (af != AF_INET)) |
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return IF2IP_NOT_FOUND; |
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len = strlen(interf); |
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if(len >= sizeof(req.ifr_name)) |
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return IF2IP_NOT_FOUND; |
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dummy = socket(AF_INET, SOCK_STREAM, 0); |
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if(CURL_SOCKET_BAD == dummy) |
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return IF2IP_NOT_FOUND; |
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memset(&req, 0, sizeof(req)); |
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memcpy(req.ifr_name, interf, len+1); |
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req.ifr_addr.sa_family = AF_INET; |
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if(ioctl(dummy, SIOCGIFADDR, &req) < 0) { |
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sclose(dummy); |
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/* With SIOCGIFADDR, we cannot tell the difference between an interface |
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that does not exist and an interface that has no address of the |
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correct family. Assume the interface does not exist */ |
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return IF2IP_NOT_FOUND; |
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} |
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s = (struct sockaddr_in *)&req.ifr_addr; |
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memcpy(&in, &s->sin_addr, sizeof(in)); |
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Curl_inet_ntop(s->sin_family, &in, buf, buf_size); |
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sclose(dummy); |
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return IF2IP_FOUND; |
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} |
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#else |
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bool Curl_if_is_interface_name(const char *interf) |
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{ |
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(void) interf; |
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return FALSE; |
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} |
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if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, |
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unsigned int remote_scope_id, const char *interf, |
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char *buf, int buf_size) |
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{ |
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(void) af; |
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(void) remote_scope; |
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(void) remote_scope_id; |
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(void) interf; |
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(void) buf; |
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(void) buf_size; |
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return IF2IP_NOT_FOUND; |
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} |
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#endif
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