| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | #include <string.h> | ||
| 22 | #include "ip.h" | ||
| 23 | #include "libavutil/avstring.h" | ||
| 24 | #include "libavutil/mem.h" | ||
| 25 | |||
| 26 | ✗ | static int compare_addr(const struct sockaddr_storage *a, | |
| 27 | const struct sockaddr_storage *b) | ||
| 28 | { | ||
| 29 | ✗ | if (a->ss_family != b->ss_family) | |
| 30 | ✗ | return 1; | |
| 31 | ✗ | if (a->ss_family == AF_INET) { | |
| 32 | ✗ | return (((const struct sockaddr_in *)a)->sin_addr.s_addr != | |
| 33 | ✗ | ((const struct sockaddr_in *)b)->sin_addr.s_addr); | |
| 34 | } | ||
| 35 | |||
| 36 | #if HAVE_STRUCT_SOCKADDR_IN6 | ||
| 37 | ✗ | if (a->ss_family == AF_INET6) { | |
| 38 | ✗ | const uint8_t *s6_addr_a = ((const struct sockaddr_in6 *)a)->sin6_addr.s6_addr; | |
| 39 | ✗ | const uint8_t *s6_addr_b = ((const struct sockaddr_in6 *)b)->sin6_addr.s6_addr; | |
| 40 | ✗ | return memcmp(s6_addr_a, s6_addr_b, 16); | |
| 41 | } | ||
| 42 | #endif | ||
| 43 | ✗ | return 1; | |
| 44 | } | ||
| 45 | |||
| 46 | ✗ | int ff_ip_check_source_lists(struct sockaddr_storage *source_addr_ptr, IPSourceFilters *s) | |
| 47 | { | ||
| 48 | int i; | ||
| 49 | ✗ | if (s->nb_exclude_addrs) { | |
| 50 | ✗ | for (i = 0; i < s->nb_exclude_addrs; i++) { | |
| 51 | ✗ | if (!compare_addr(source_addr_ptr, &s->exclude_addrs[i])) | |
| 52 | ✗ | return 1; | |
| 53 | } | ||
| 54 | } | ||
| 55 | ✗ | if (s->nb_include_addrs) { | |
| 56 | ✗ | for (i = 0; i < s->nb_include_addrs; i++) { | |
| 57 | ✗ | if (!compare_addr(source_addr_ptr, &s->include_addrs[i])) | |
| 58 | ✗ | return 0; | |
| 59 | } | ||
| 60 | ✗ | return 1; | |
| 61 | } | ||
| 62 | ✗ | return 0; | |
| 63 | } | ||
| 64 | |||
| 65 | ✗ | struct addrinfo *ff_ip_resolve_host(void *log_ctx, | |
| 66 | const char *hostname, int port, | ||
| 67 | int type, int family, int flags) | ||
| 68 | { | ||
| 69 | ✗ | struct addrinfo hints = { 0 }, *res = 0; | |
| 70 | int error; | ||
| 71 | char sport[16]; | ||
| 72 | ✗ | const char *node = 0, *service = "0"; | |
| 73 | |||
| 74 | ✗ | if (port > 0) { | |
| 75 | ✗ | snprintf(sport, sizeof(sport), "%d", port); | |
| 76 | ✗ | service = sport; | |
| 77 | } | ||
| 78 | ✗ | if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) { | |
| 79 | ✗ | node = hostname; | |
| 80 | } | ||
| 81 | ✗ | hints.ai_socktype = type; | |
| 82 | ✗ | hints.ai_family = family; | |
| 83 | ✗ | hints.ai_flags = flags; | |
| 84 | ✗ | if ((error = getaddrinfo(node, service, &hints, &res))) { | |
| 85 | ✗ | res = NULL; | |
| 86 | ✗ | av_log(log_ctx, AV_LOG_ERROR, "getaddrinfo(%s, %s): %s\n", | |
| 87 | node ? node : "unknown", | ||
| 88 | service, | ||
| 89 | gai_strerror(error)); | ||
| 90 | } | ||
| 91 | |||
| 92 | ✗ | return res; | |
| 93 | } | ||
| 94 | |||
| 95 | |||
| 96 | ✗ | static int ip_parse_addr_list(void *log_ctx, const char *buf, | |
| 97 | struct sockaddr_storage **address_list_ptr, | ||
| 98 | int *address_list_size_ptr) | ||
| 99 | { | ||
| 100 | ✗ | struct addrinfo *ai = NULL; | |
| 101 | |||
| 102 | /* Resolve all of the IPs */ | ||
| 103 | |||
| 104 | ✗ | while (buf && buf[0]) { | |
| 105 | ✗ | char* host = av_get_token(&buf, ","); | |
| 106 | ✗ | if (!host) | |
| 107 | ✗ | return AVERROR(ENOMEM); | |
| 108 | |||
| 109 | ✗ | ai = ff_ip_resolve_host(log_ctx, host, 0, SOCK_DGRAM, AF_UNSPEC, 0); | |
| 110 | ✗ | av_freep(&host); | |
| 111 | |||
| 112 | ✗ | if (ai) { | |
| 113 | ✗ | struct sockaddr_storage source_addr = {0}; | |
| 114 | ✗ | memcpy(&source_addr, ai->ai_addr, ai->ai_addrlen); | |
| 115 | ✗ | freeaddrinfo(ai); | |
| 116 | ✗ | av_dynarray2_add((void **)address_list_ptr, address_list_size_ptr, sizeof(source_addr), (uint8_t *)&source_addr); | |
| 117 | ✗ | if (!*address_list_ptr) | |
| 118 | ✗ | return AVERROR(ENOMEM); | |
| 119 | } else { | ||
| 120 | ✗ | return AVERROR(EINVAL); | |
| 121 | } | ||
| 122 | |||
| 123 | ✗ | if (*buf) | |
| 124 | ✗ | buf++; | |
| 125 | } | ||
| 126 | |||
| 127 | ✗ | return 0; | |
| 128 | } | ||
| 129 | |||
| 130 | ✗ | static int ip_parse_sources_and_blocks(void *log_ctx, const char *buf, IPSourceFilters *filters, int parse_include_list) | |
| 131 | { | ||
| 132 | int ret; | ||
| 133 | ✗ | if (parse_include_list) | |
| 134 | ✗ | ret = ip_parse_addr_list(log_ctx, buf, &filters->include_addrs, &filters->nb_include_addrs); | |
| 135 | else | ||
| 136 | ✗ | ret = ip_parse_addr_list(log_ctx, buf, &filters->exclude_addrs, &filters->nb_exclude_addrs); | |
| 137 | |||
| 138 | ✗ | if (ret >= 0 && filters->nb_include_addrs && filters->nb_exclude_addrs) { | |
| 139 | ✗ | av_log(log_ctx, AV_LOG_ERROR, "Simultaneously including and excluding sources is not supported.\n"); | |
| 140 | ✗ | return AVERROR(EINVAL); | |
| 141 | } | ||
| 142 | ✗ | return ret; | |
| 143 | } | ||
| 144 | |||
| 145 | ✗ | int ff_ip_parse_sources(void *log_ctx, const char *buf, IPSourceFilters *filters) | |
| 146 | { | ||
| 147 | ✗ | return ip_parse_sources_and_blocks(log_ctx, buf, filters, 1); | |
| 148 | } | ||
| 149 | |||
| 150 | ✗ | int ff_ip_parse_blocks(void *log_ctx, const char *buf, IPSourceFilters *filters) | |
| 151 | { | ||
| 152 | ✗ | return ip_parse_sources_and_blocks(log_ctx, buf, filters, 0); | |
| 153 | } | ||
| 154 | |||
| 155 | ✗ | void ff_ip_reset_filters(IPSourceFilters *filters) | |
| 156 | { | ||
| 157 | ✗ | av_freep(&filters->exclude_addrs); | |
| 158 | ✗ | av_freep(&filters->include_addrs); | |
| 159 | ✗ | filters->nb_include_addrs = 0; | |
| 160 | ✗ | filters->nb_exclude_addrs = 0; | |
| 161 | ✗ | } | |
| 162 |