1 /* 2 * IP common code 3 * 4 * This file is part of FFmpeg. 5 * 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. 10 * 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. 15 * 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 19 */ 20 21 #ifndef AVFORMAT_IP_H 22 #define AVFORMAT_IP_H 23 24 #include "network.h" 25 26 /** 27 * Structure for storing IP (UDP) source filters or block lists. 28 */ 29 typedef struct IPSourceFilters { 30 int nb_include_addrs; 31 int nb_exclude_addrs; 32 struct sockaddr_storage *include_addrs; 33 struct sockaddr_storage *exclude_addrs; 34 } IPSourceFilters; 35 36 /** 37 * Checks the source address against a given IP source filter. 38 * @return 0 if packet should be processed based on the filter, 1 if the packet 39 * can be dropped. 40 */ 41 int ff_ip_check_source_lists(struct sockaddr_storage *source_addr_ptr, IPSourceFilters *s); 42 43 /** 44 * Resolves hostname into an addrinfo structure. 45 * @return addrinfo structure which should be freed by the user, NULL in case 46 * of error. 47 */ 48 struct addrinfo *ff_ip_resolve_host(void *log_ctx, 49 const char *hostname, int port, 50 int type, int family, int flags); 51 52 /** 53 * Parses the address[,address] source list in buf and adds it to the filters 54 * in the IPSourceFilters structure. 55 * @return 0 on success, < 0 AVERROR code on error. 56 */ 57 int ff_ip_parse_sources(void *log_ctx, const char *buf, IPSourceFilters *filters); 58 59 /** 60 * Parses the address[,address] source block list in buf and adds it to the 61 * filters in the IPSourceFilters structure. 62 * @return 0 on success, < 0 AVERROR code on error. 63 */ 64 int ff_ip_parse_blocks(void *log_ctx, const char *buf, IPSourceFilters *filters); 65 66 /** 67 * Resets the IP filter list and frees the internal fields of an 68 * IPSourceFilters structure. 69 */ 70 void ff_ip_reset_filters(IPSourceFilters *filters); 71 72 #endif /* AVFORMAT_IP_H */ 73