1c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt/* 2c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * Copyright (C) 2012 The Android Open Source Project 3c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * 4c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * Licensed under the Apache License, Version 2.0 (the "License"); 5c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * you may not use this file except in compliance with the License. 6c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * You may obtain a copy of the License at 7c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * 8c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * http://www.apache.org/licenses/LICENSE-2.0 9c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * 10c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * Unless required by applicable law or agreed to in writing, software 11c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * distributed under the License is distributed on an "AS IS" BASIS, 12c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * See the License for the specific language governing permissions and 14c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt * limitations under the License. 15c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt */ 16c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt 17aa1be2b3d24d99f3ccb98ff4fbb2a81b63587effDan Albert#include <ctype.h> 18aa1be2b3d24d99f3ccb98ff4fbb2a81b63587effDan Albert#include <errno.h> 1970afde6ad9b5fce63cca594ac9b230d2fc9b21eeLorenzo Colitti#include <fcntl.h> 20ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti#include <netdb.h> 21aa1be2b3d24d99f3ccb98ff4fbb2a81b63587effDan Albert#include <net/if.h> 22ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti#include <netinet/in.h> 23ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti#include <stdlib.h> 248e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey#include <string.h> 25838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand#include <sys/wait.h> 268e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 27bec6d04e1a84823b89e5581ea8ebcf9f08915216Jeff Sharkey#define LOG_TAG "Netd" 28bec6d04e1a84823b89e5581ea8ebcf9f08915216Jeff Sharkey 298e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey#include <cutils/log.h> 30838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand#include <logwrap/logwrap.h> 318e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 32c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt#include "NetdConstants.h" 33c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwalt 34c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwaltconst char * const OEM_SCRIPT_PATH = "/system/bin/oem-iptables-init.sh"; 35c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwaltconst char * const IPTABLES_PATH = "/system/bin/iptables"; 360031cead820149e2fe3ccb3cc2fe05758a3cb5c2JP Abgrallconst char * const IP6TABLES_PATH = "/system/bin/ip6tables"; 3789faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitticonst char * const IPTABLES_RESTORE_PATH = "/system/bin/iptables-restore"; 3889faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitticonst char * const IP6TABLES_RESTORE_PATH = "/system/bin/ip6tables-restore"; 39c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwaltconst char * const TC_PATH = "/system/bin/tc"; 40c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwaltconst char * const IP_PATH = "/system/bin/ip"; 41c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwaltconst char * const ADD = "add"; 42c462177bd58e3bf0ac4f618934dae060569e3e0bRobert Greenwaltconst char * const DEL = "del"; 438e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 44838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchandstatic void logExecError(const char* argv[], int res, int status) { 458e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey const char** argp = argv; 468e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey std::string args = ""; 478e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey while (*argp) { 488e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey args += *argp; 498e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey args += ' '; 508e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey argp++; 518e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey } 52838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand ALOGE("exec() res=%d, status=%d for %s", res, status, args.c_str()); 53838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand} 54838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand 55838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchandstatic int execIptablesCommand(int argc, const char *argv[], bool silent) { 56838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand int res; 57838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand int status; 58838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand 59838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand res = android_fork_execvp(argc, (char **)argv, &status, false, 60838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand !silent); 61838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand if (res || !WIFEXITED(status) || WEXITSTATUS(status)) { 62838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand if (!silent) { 63838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand logExecError(argv, res, status); 64838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand } 65838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand if (res) 66838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand return res; 67838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand if (!WIFEXITED(status)) 68838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand return ECHILD; 69838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand } 70838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand return WEXITSTATUS(status); 718e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey} 728e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 738e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkeystatic int execIptables(IptablesTarget target, bool silent, va_list args) { 748e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey /* Read arguments from incoming va_list; we expect the list to be NULL terminated. */ 758e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey std::list<const char*> argsList; 768e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey argsList.push_back(NULL); 778e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey const char* arg; 78390e4ea8106f9e741bc80fb962aaee94d5b28cbbAmith Yamasani 79390e4ea8106f9e741bc80fb962aaee94d5b28cbbAmith Yamasani // Wait to avoid failure due to another process holding the lock 80390e4ea8106f9e741bc80fb962aaee94d5b28cbbAmith Yamasani argsList.push_back("-w"); 81390e4ea8106f9e741bc80fb962aaee94d5b28cbbAmith Yamasani 828e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey do { 838e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey arg = va_arg(args, const char *); 848e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey argsList.push_back(arg); 858e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey } while (arg); 868e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 878e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey int i = 0; 888e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey const char* argv[argsList.size()]; 898e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey std::list<const char*>::iterator it; 908e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey for (it = argsList.begin(); it != argsList.end(); it++, i++) { 918e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey argv[i] = *it; 928e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey } 938e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 948e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey int res = 0; 958e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey if (target == V4 || target == V4V6) { 968e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey argv[0] = IPTABLES_PATH; 97838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand res |= execIptablesCommand(argsList.size(), argv, silent); 988e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey } 998e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey if (target == V6 || target == V4V6) { 1008e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey argv[0] = IP6TABLES_PATH; 101838ef6491794900731760aecc1d4a10bb2fdd2ecRom Lemarchand res |= execIptablesCommand(argsList.size(), argv, silent); 1028e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey } 1038e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey return res; 1048e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey} 1058e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 1068e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkeyint execIptables(IptablesTarget target, ...) { 1078e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey va_list args; 1088e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey va_start(args, target); 1098e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey int res = execIptables(target, false, args); 1108e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey va_end(args); 1118e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey return res; 1128e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey} 1138e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey 1148e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkeyint execIptablesSilently(IptablesTarget target, ...) { 1158e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey va_list args; 1168e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey va_start(args, target); 1178e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey int res = execIptables(target, true, args); 1188e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey va_end(args); 1198e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey return res; 1208e188ed5c989ddcc07f0f5e9839493c22d17e7b6Jeff Sharkey} 12170afde6ad9b5fce63cca594ac9b230d2fc9b21eeLorenzo Colitti 12289faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colittistatic int execIptablesRestoreCommand(const char *cmd, const std::string& commands) { 12389faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti const char *argv[] = { 12489faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti cmd, 12589faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti "--noflush", // Don't flush the whole table. 12689faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti "-w", // Wait instead of failing if the lock is held. 12789faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti }; 12889faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti AndroidForkExecvpOption opt[1] = { 12989faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti { 13089faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti .opt_type = FORK_EXECVP_OPTION_INPUT, 13189faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti .opt_input.input = reinterpret_cast<const uint8_t*>(commands.c_str()), 13289faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti .opt_input.input_len = commands.size(), 13389faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti } 13489faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti }; 13589faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti 13689faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti int status = 0; 13789faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti int res = android_fork_execvp_ext( 13889faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti ARRAY_SIZE(argv), (char**)argv, &status, false /* ignore_int_quit */, LOG_NONE, 13989faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti false /* abbreviated */, NULL /* file_path */, opt, ARRAY_SIZE(opt)); 14089faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti if (res || status) { 14189faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti ALOGE("%s failed with res=%d, status=%d", argv[0], res, status); 14289faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti return -1; 14389faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti } 14489faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti 14589faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti return 0; 14689faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti} 14789faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti 14889faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colittiint execIptablesRestore(IptablesTarget target, const std::string& commands) { 14989faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti int res = 0; 15089faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti if (target == V4 || target == V4V6) { 15189faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti res |= execIptablesRestoreCommand(IPTABLES_RESTORE_PATH, commands); 15289faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti } 15389faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti if (target == V6 || target == V4V6) { 15489faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti res |= execIptablesRestoreCommand(IP6TABLES_RESTORE_PATH, commands); 15589faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti } 15689faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti return res; 15789faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti} 15889faa349525ad1110b6fa3f2149e6ef825c65662Lorenzo Colitti 15969261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall/* 16069261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall * Check an interface name for plausibility. This should e.g. help against 16169261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall * directory traversal. 16269261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall */ 16369261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrallbool isIfaceName(const char *name) { 16469261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall size_t i; 16569261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall size_t name_len = strlen(name); 16669261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall if ((name_len == 0) || (name_len > IFNAMSIZ)) { 16769261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall return false; 16869261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall } 16969261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall 17069261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall /* First character must be alphanumeric */ 17169261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall if (!isalnum(name[0])) { 17269261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall return false; 17369261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall } 17469261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall 17569261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall for (i = 1; i < name_len; i++) { 17669261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall if (!isalnum(name[i]) && (name[i] != '_') && (name[i] != '-') && (name[i] != ':')) { 17769261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall return false; 17869261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall } 17969261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall } 18069261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall 18169261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall return true; 18269261cb65186e27dfbdc1e3eec796437f9968ff9JP Abgrall} 183ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 184ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colittiint parsePrefix(const char *prefix, uint8_t *family, void *address, int size, uint8_t *prefixlen) { 185ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti if (!prefix || !family || !address || !prefixlen) { 186ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -EFAULT; 187ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 188ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 189ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti // Find the '/' separating address from prefix length. 190ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti const char *slash = strchr(prefix, '/'); 191ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti const char *prefixlenString = slash + 1; 192ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti if (!slash || !*prefixlenString) 193ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -EINVAL; 194ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 195ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti // Convert the prefix length to a uint8_t. 196ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti char *endptr; 197ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti unsigned templen; 198ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti templen = strtoul(prefixlenString, &endptr, 10); 199ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti if (*endptr || templen > 255) { 200ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -EINVAL; 201ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 202ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti *prefixlen = templen; 203ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 204ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti // Copy the address part of the prefix to a local buffer. We have to copy 205ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti // because inet_pton and getaddrinfo operate on null-terminated address 206ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti // strings, but prefix is const and has '/' after the address. 207ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti std::string addressString(prefix, slash - prefix); 208ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 209ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti // Parse the address. 210ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti addrinfo *res; 211ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti addrinfo hints = { 212ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti .ai_flags = AI_NUMERICHOST, 213ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti }; 214ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti int ret = getaddrinfo(addressString.c_str(), NULL, &hints, &res); 215ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti if (ret || !res) { 216ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -EINVAL; // getaddrinfo return values are not errno values. 217ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 218ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 219ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti // Convert the address string to raw address bytes. 220ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti void *rawAddress; 221ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti int rawLength; 222ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti switch (res[0].ai_family) { 223ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti case AF_INET: { 224ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti if (*prefixlen > 32) { 225ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -EINVAL; 226ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 227ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti sockaddr_in *sin = (sockaddr_in *) res[0].ai_addr; 228ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti rawAddress = &sin->sin_addr; 229ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti rawLength = 4; 230ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti break; 231ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 232ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti case AF_INET6: { 233ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti if (*prefixlen > 128) { 234ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -EINVAL; 235ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 236ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti sockaddr_in6 *sin6 = (sockaddr_in6 *) res[0].ai_addr; 237ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti rawAddress = &sin6->sin6_addr; 238ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti rawLength = 16; 239ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti break; 240ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 241ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti default: { 242ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti freeaddrinfo(res); 243ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -EAFNOSUPPORT; 244ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 245ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 246ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 247ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti if (rawLength > size) { 248ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti freeaddrinfo(res); 249ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return -ENOSPC; 250ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti } 251ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 252ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti *family = res[0].ai_family; 253ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti memcpy(address, rawAddress, rawLength); 254ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti freeaddrinfo(res); 255ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti 256ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti return rawLength; 257ba25df989b48f36b784ad39307a49a4fd9c3fd66Lorenzo Colitti} 258