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bf7375ecc5
Before this patch `accept4()`, `socket()`, `socketpair()`, `send()` and `recv()` system symbols were remapped via macros, using the same name, to local curl debug wrappers. This patch replaces these overrides by introducing curl-namespaced macros that map either to the system symbols or to their curl debug wrappers in `CURLDEBUG` (TrackMemory) builds. This follows a patch that implemented the same for `accept()`. The old method required tricks to make these redefines work in unity builds, and avoid them interfering with system headers. These tricks did not work for system symbols implemented as macros. The new method allows to setup these mappings once, without interfering with system headers, upstream macros, or unity builds. It makes builds more robust. Also: - checksrc: ban all mapped functions. - docs/examples: tidy up checksrc rules. Follow-up to9863599d69#18502 Follow-up to3bb5e58c10#17827 Closes #18503
269 lines
7.3 KiB
C
269 lines
7.3 KiB
C
/***************************************************************************
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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) 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.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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* SPDX-License-Identifier: curl
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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 "curlx/inet_ntop.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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#ifdef USE_IPV6
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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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if(sa->sa_family == AF_INET6) {
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const struct sockaddr_in6 * sa6 =
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(const struct sockaddr_in6 *)(const 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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if((b[0] & 0xFE) == 0xFC) /* Handle ULAs */
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return IPV6_SCOPE_UNIQUELOCAL;
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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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return IPV6_SCOPE_GLOBAL;
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}
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#endif
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#if !defined(CURL_DISABLE_BINDLOCAL) || !defined(CURL_DISABLE_FTP)
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#ifdef HAVE_GETIFADDRS
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if2ip_result_t Curl_if2ip(int af,
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#ifdef USE_IPV6
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unsigned int remote_scope,
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unsigned int local_scope_id,
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#endif
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const char *interf,
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char *buf, size_t 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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#if defined(USE_IPV6) && \
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!defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
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(void)local_scope_id;
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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) {
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if(iface->ifa_addr->sa_family == af) {
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if(curl_strequal(iface->ifa_name, interf)) {
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void *addr;
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const char *ip;
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char scope[12] = "";
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char ipstr[64];
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#ifdef USE_IPV6
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if(af == AF_INET6) {
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#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
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unsigned int scopeid = 0;
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#endif
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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 scope
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matches the remote address we want to connect to: global
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for global, link-local for link-local, etc... */
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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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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(local_scope_id && scopeid != local_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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if(scopeid)
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msnprintf(scope, sizeof(scope), "%%%u", scopeid);
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#endif
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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 = curlx_inet_ntop(af, addr, ipstr, sizeof(ipstr));
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msnprintf(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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curl_strequal(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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if2ip_result_t Curl_if2ip(int af,
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#ifdef USE_IPV6
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unsigned int remote_scope,
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unsigned int local_scope_id,
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#endif
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const char *interf,
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char *buf, size_t 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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const char *r;
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#ifdef USE_IPV6
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(void)remote_scope;
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(void)local_scope_id;
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#endif
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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 = CURL_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 defined(__GNUC__) && defined(_AIX)
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/* Suppress warning inside system headers */
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wshift-sign-overflow"
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#endif
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if(ioctl(dummy, SIOCGIFADDR, &req) < 0) {
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#if defined(__GNUC__) && defined(_AIX)
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#pragma GCC diagnostic pop
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#endif
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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 *)(void *)&req.ifr_addr;
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memcpy(&in, &s->sin_addr, sizeof(in));
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r = curlx_inet_ntop(s->sin_family, &in, buf, buf_size);
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sclose(dummy);
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if(!r)
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return IF2IP_NOT_FOUND;
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return IF2IP_FOUND;
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}
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#else
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if2ip_result_t Curl_if2ip(int af,
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#ifdef USE_IPV6
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unsigned int remote_scope,
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unsigned int local_scope_id,
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#endif
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const char *interf,
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char *buf, size_t buf_size)
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{
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(void)af;
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#ifdef USE_IPV6
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(void)remote_scope;
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(void)local_scope_id;
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#endif
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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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#endif /* CURL_DISABLE_BINDLOCAL && CURL_DISABLE_FTP */
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