| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 1998 - 2020, Daniel Stenberg, <[email protected]>, 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 https://curl.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 "strcase.h" |
| #include "if2ip.h" |
| /* The last 3 #include files should be in this order */ |
| #include "curl_printf.h" |
| #include "curl_memory.h" |
| #include "memdebug.h" |
| |
| /* ------------------------------------------------------------------ */ |
| |
| /* Return the scope of the given address. */ |
| 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 *)(void *) sa; |
| const unsigned char *b = sa6->sin6_addr.s6_addr; |
| unsigned short w = (unsigned short) ((b[0] << 8) | b[1]); |
| |
| if((b[0] & 0xFE) == 0xFC) /* Handle ULAs */ |
| return IPV6_SCOPE_UNIQUELOCAL; |
| 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) |
| |
| if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, |
| unsigned int local_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; |
| #endif |
| |
| #if !defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID) || \ |
| !defined(ENABLE_IPV6) |
| (void) local_scope_id; |
| #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(strcasecompare(iface->ifa_name, interf)) { |
| void *addr; |
| const char *ip; |
| char scope[12] = ""; |
| char ipstr[64]; |
| #ifdef ENABLE_IPV6 |
| if(af == AF_INET6) { |
| #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID |
| unsigned int scopeid = 0; |
| #endif |
| 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 *)(void *)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 *)(void *)iface->ifa_addr) |
| ->sin6_scope_id; |
| |
| /* If given, scope id should match. */ |
| if(local_scope_id && scopeid != local_scope_id) { |
| if(res == IF2IP_NOT_FOUND) |
| res = IF2IP_AF_NOT_SUPPORTED; |
| |
| continue; |
| } |
| |
| if(scopeid) |
| msnprintf(scope, sizeof(scope), "%%%u", scopeid); |
| #endif |
| } |
| else |
| #endif |
| addr = |
| &((struct sockaddr_in *)(void *)iface->ifa_addr)->sin_addr; |
| res = IF2IP_FOUND; |
| ip = Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr)); |
| msnprintf(buf, buf_size, "%s%s", ip, scope); |
| break; |
| } |
| } |
| else if((res == IF2IP_NOT_FOUND) && |
| strcasecompare(iface->ifa_name, interf)) { |
| res = IF2IP_AF_NOT_SUPPORTED; |
| } |
| } |
| } |
| |
| freeifaddrs(head); |
| } |
| |
| return res; |
| } |
| |
| #elif defined(HAVE_IOCTL_SIOCGIFADDR) |
| |
| if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, |
| unsigned int local_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; |
| const char *r; |
| |
| (void)remote_scope; |
| (void)local_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 *)(void *)&req.ifr_addr; |
| memcpy(&in, &s->sin_addr, sizeof(in)); |
| r = Curl_inet_ntop(s->sin_family, &in, buf, buf_size); |
| |
| sclose(dummy); |
| if(!r) |
| return IF2IP_NOT_FOUND; |
| return IF2IP_FOUND; |
| } |
| |
| #else |
| |
| if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, |
| unsigned int local_scope_id, const char *interf, |
| char *buf, int buf_size) |
| { |
| (void) af; |
| (void) remote_scope; |
| (void) local_scope_id; |
| (void) interf; |
| (void) buf; |
| (void) buf_size; |
| return IF2IP_NOT_FOUND; |
| } |
| |
| #endif |
