4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avstring.h"
24 static int compare_addr(const struct sockaddr_storage *a,
25 const struct sockaddr_storage *b)
27 if (a->ss_family != b->ss_family)
29 if (a->ss_family == AF_INET) {
30 return (((const struct sockaddr_in *)a)->sin_addr.s_addr !=
31 ((const struct sockaddr_in *)b)->sin_addr.s_addr);
34 #if HAVE_STRUCT_SOCKADDR_IN6
35 if (a->ss_family == AF_INET6) {
36 const uint8_t *s6_addr_a = ((const struct sockaddr_in6 *)a)->sin6_addr.s6_addr;
37 const uint8_t *s6_addr_b = ((const struct sockaddr_in6 *)b)->sin6_addr.s6_addr;
38 return memcmp(s6_addr_a, s6_addr_b, 16);
44 int ff_ip_check_source_lists(struct sockaddr_storage *source_addr_ptr, IPSourceFilters *s)
47 if (s->nb_exclude_addrs) {
48 for (i = 0; i < s->nb_exclude_addrs; i++) {
49 if (!compare_addr(source_addr_ptr, &s->exclude_addrs[i]))
53 if (s->nb_include_addrs) {
54 for (i = 0; i < s->nb_include_addrs; i++) {
55 if (!compare_addr(source_addr_ptr, &s->include_addrs[i]))
63 struct addrinfo *ff_ip_resolve_host(void *log_ctx,
64 const char *hostname, int port,
65 int type, int family, int flags)
67 struct addrinfo hints = { 0 }, *res = 0;
70 const char *node = 0, *service = "0";
73 snprintf(sport, sizeof(sport), "%d", port);
76 if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
79 hints.ai_socktype = type;
80 hints.ai_family = family;
81 hints.ai_flags = flags;
82 if ((error = getaddrinfo(node, service, &hints, &res))) {
84 av_log(log_ctx, AV_LOG_ERROR, "getaddrinfo(%s, %s): %s\n",
85 node ? node : "unknown",
94 static int ip_parse_addr_list(void *log_ctx, const char *buf,
95 struct sockaddr_storage **address_list_ptr,
96 int *address_list_size_ptr)
98 struct addrinfo *ai = NULL;
100 /* Resolve all of the IPs */
102 while (buf && buf[0]) {
103 char* host = av_get_token(&buf, ",");
105 return AVERROR(ENOMEM);
107 ai = ff_ip_resolve_host(log_ctx, host, 0, SOCK_DGRAM, AF_UNSPEC, 0);
111 struct sockaddr_storage source_addr = {0};
112 memcpy(&source_addr, ai->ai_addr, ai->ai_addrlen);
114 av_dynarray2_add((void **)address_list_ptr, address_list_size_ptr, sizeof(source_addr), (uint8_t *)&source_addr);
115 if (!*address_list_ptr)
116 return AVERROR(ENOMEM);
118 return AVERROR(EINVAL);
128 static int ip_parse_sources_and_blocks(void *log_ctx, const char *buf, IPSourceFilters *filters, int parse_include_list)
131 if (parse_include_list)
132 ret = ip_parse_addr_list(log_ctx, buf, &filters->include_addrs, &filters->nb_include_addrs);
134 ret = ip_parse_addr_list(log_ctx, buf, &filters->exclude_addrs, &filters->nb_exclude_addrs);
136 if (ret >= 0 && filters->nb_include_addrs && filters->nb_exclude_addrs) {
137 av_log(log_ctx, AV_LOG_ERROR, "Simultaneously including and excluding sources is not supported.\n");
138 return AVERROR(EINVAL);
143 int ff_ip_parse_sources(void *log_ctx, const char *buf, IPSourceFilters *filters)
145 return ip_parse_sources_and_blocks(log_ctx, buf, filters, 1);
148 int ff_ip_parse_blocks(void *log_ctx, const char *buf, IPSourceFilters *filters)
150 return ip_parse_sources_and_blocks(log_ctx, buf, filters, 0);
153 void ff_ip_reset_filters(IPSourceFilters *filters)
155 av_freep(&filters->exclude_addrs);
156 av_freep(&filters->include_addrs);
157 filters->nb_include_addrs = 0;
158 filters->nb_exclude_addrs = 0;