/* * ipaddrcheck.c: an IPv4/IPv6 validator * * Maintainer: Daniil Baturin * * Copyright (C) 2013 SO3Group * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * */ #include #include "config.h" #include "ipaddrcheck_functions.h" /* Option codes */ #define IS_VALID 10 #define IS_IPV4 20 #define IS_IPV4_CIDR 30 #define IS_IPV4_SINGLE 40 #define IS_IPV4_HOST 50 #define IS_IPV4_NET 60 #define IS_IPV4_BROADCAST 70 #define IS_IPV4_UNICAST 80 #define IS_IPV4_MULTICAST 90 #define IS_IPV4_RFC1918 100 #define IS_IPV4_LOOPBACK 110 #define IS_IPV4_LINKLOCAL 120 #define IS_IPV6 130 #define IS_IPV6_CIDR 140 #define IS_IPV6_SINGLE 150 #define IS_IPV6_HOST 160 #define IS_IPV6_NET 170 #define IS_IPV6_UNICAST 180 #define IS_IPV6_MULTICAST 190 #define IS_IPV6_LINKLOCAL 200 #define IS_VALID_INTF_ADDR 220 #define IS_ANY_CIDR 230 #define IS_ANY_SINGLE 240 #define ALLOW_LOOPBACK 250 #define IS_ANY_HOST 260 #define IS_ANY_NET 270 #define NO_ACTION 500 static const struct option options[] = { { "is-valid", no_argument, NULL, 'a' }, { "is-ipv4", no_argument, NULL, 'c' }, { "is-ipv4-cidr", no_argument, NULL, 'd' }, { "is-ipv4-single", no_argument, NULL, 'e' }, { "is-any-cidr", no_argument, NULL, 'A' }, { "is-any-single", no_argument, NULL, 'B' }, { "is-ipv4-host", no_argument, NULL, 'f' }, { "is-ipv4-net", no_argument, NULL, 'g' }, { "is-ipv4-broadcast", no_argument, NULL, 'h' }, { "is-ipv4-multicast", no_argument, NULL, 'i' }, { "is-ipv4-loopback", no_argument, NULL, 'j' }, { "is-ipv4-link-local", no_argument, NULL, 'k' }, { "is-ipv4-rfc1918", no_argument, NULL, 'l' }, { "is-ipv6", no_argument, NULL, 'm' }, { "is-ipv6-cidr", no_argument, NULL, 'n' }, { "is-ipv6-single", no_argument, NULL, 'o' }, { "is-ipv6-host", no_argument, NULL, 'p' }, { "is-ipv6-net", no_argument, NULL, 'r' }, { "is-ipv6-multicast", no_argument, NULL, 's' }, { "is-ipv6-link-local", no_argument, NULL, 't' }, { "is-valid-intf-address", no_argument, NULL, 'u' }, { "allow-loopback", no_argument, NULL, 'C' }, { "is-any-host", no_argument, NULL, 'D' }, { "is-any-net", no_argument, NULL, 'E' }, { "version", no_argument, NULL, 'z' }, { "help", no_argument, NULL, '?' }, { NULL, no_argument, NULL, 0 } }; /* Auxillary functions */ static void print_help(const char* program_name); static void print_version(void); int main(int argc, char* argv[]) { char *address_str = ""; /* IP address string obtained from arguments */ int action = 0; /* Action associated with given check option */ int* actions; /* Array of all given actions */ int action_count = 0; /* Actions array size */ int option_index = 0; /* Number of the current option for getopt call */ int optc; /* Option character for getopt call */ int allow_loopback = NO_LOOPBACK; /* Allow IPv4 loopback in --is-valid-intf-address */ int no_action = 0; /* Indicates the option modifies program behaviour but doesn't have its own action */ const char* program_name = argv[0]; /* Program name for use in messages */ /* Parse options, convert to action codes, store in array */ /* Try to allocate memory for the actions array, abort if fail */ actions = (int*)calloc(argc, sizeof(int)); if( errno == ENOMEM ) { fprintf(stderr, "Error: could not allocate memory!\n"); return(RESULT_INT_ERROR); } while( (optc = getopt_long(argc, argv, "acdefghijklmnoprstuzABCDE?", options, &option_index)) != -1 ) { switch(optc) { case 'a': action = IS_VALID; break; case 'b': break; case 'c': action = IS_IPV4; break; case 'd': action = IS_IPV4_CIDR; break; case 'e': action = IS_IPV4_SINGLE; break; case 'f': action = IS_IPV4_HOST; break; case 'g': action = IS_IPV4_NET; case 'h': action = IS_IPV4_BROADCAST; break; case 'i': action = IS_IPV4_MULTICAST; break; case 'j': action = IS_IPV4_LOOPBACK; break; case 'k': action = IS_IPV4_LINKLOCAL; break; case 'l': action = IS_IPV4_RFC1918; break; case 'm': action = IS_IPV6; break; case 'n': action = IS_IPV6_CIDR; break; case 'o': action = IS_IPV6_SINGLE; break; case 'p': action = IS_IPV6_HOST; break; case 'r': action = IS_IPV6_NET; break; case 's': action = IS_IPV6_MULTICAST; break; case 't': action = IS_IPV6_LINKLOCAL; break; case 'u': action = IS_VALID_INTF_ADDR; break; case 'A': action = IS_ANY_CIDR; break; case 'B': action = IS_ANY_SINGLE; break; case 'C': allow_loopback = LOOPBACK_ALLOWED; no_action = NO_ACTION; break; case 'D': action = IS_ANY_HOST; break; case 'E': action = IS_ANY_NET; break; case '?': print_help(program_name); return(EXIT_SUCCESS); case 'z': print_version(); return(EXIT_SUCCESS); default: fprintf(stderr, "Error: invalid option\n"); print_help(program_name); return(RESULT_INT_ERROR); break; } if( no_action != NO_ACTION ) { action_count = optind-2; actions[action_count] = action; } else { no_action = 0; /* Reset no_action */ } } /* Exit if no option given */ if( optind < 2 ) { fprintf(stderr, "Error: at least one option expected!\n"); print_help(program_name); return(RESULT_INT_ERROR); } /* Get non-option arguments */ if( (argc - optind) == 1 ) { address_str = argv[optind]; } else { fprintf(stderr, "Error: wrong number of arguments, one argument required!\n"); print_help(program_name); return(RESULT_INT_ERROR); } CIDR *address; address = cidr_from_str(address_str); int result = RESULT_SUCCESS; /* Check if the address is valid and well-formatted at all, if not there is no point in going further */ if( !( (is_valid_address(address) == RESULT_SUCCESS) && ((is_any_cidr(address_str) == RESULT_SUCCESS) || (is_any_single(address_str) == RESULT_SUCCESS)) ) ) { return(EXIT_FAILURE); } /* no else needed, the rest is one big else */ while( (action_count >= 0) && (result == RESULT_SUCCESS) ) { switch(actions[action_count]) { case IS_VALID: result = is_valid_address(address); break; case IS_IPV4: result = is_ipv4(address); break; case IS_IPV4_CIDR: result = is_ipv4_cidr(address_str); break; case IS_IPV4_SINGLE: result = is_ipv4_single(address_str); break; case IS_IPV4_HOST: /* Host vs. network address check only makes sense if prefix length is given */ if( !is_ipv4_cidr(address_str) ) { result = RESULT_FAILURE; } else { result = is_ipv4_host(address); } break; case IS_IPV4_NET: /* Host vs. network address check only makes sense if prefix length is given */ if( !is_ipv4_cidr(address_str) ) { result = RESULT_FAILURE; } else { result = is_ipv4_net(address); } break; case IS_IPV4_BROADCAST: /* Broadcast address check only makes sense if prefix length is given */ if( !is_ipv4_cidr(address_str) ) { result = RESULT_FAILURE; } else { result = is_ipv4_broadcast(address); } break; case IS_IPV4_MULTICAST: result = is_ipv4_multicast(address); break; case IS_IPV4_LOOPBACK: result = is_ipv4_loopback(address); break; case IS_IPV4_LINKLOCAL: result = is_ipv4_link_local(address); break; case IS_IPV4_RFC1918: result = is_ipv4_rfc1918(address); break; case IS_IPV6: result = is_ipv6(address); break; case IS_IPV6_CIDR: result = is_ipv6_cidr(address_str); break; case IS_IPV6_SINGLE: result = is_ipv6_single(address_str); break; case IS_IPV6_HOST: /* Host vs. network address check only makes sense if prefix length is given */ if( !is_ipv6_cidr(address_str) ) { result = RESULT_FAILURE; } else { result = is_ipv6_host(address); } break; case IS_IPV6_NET: /* Host vs. network address check only makes sense if prefix length is given */ if( !is_ipv6_cidr(address_str) ) { result = RESULT_FAILURE; } else { result = is_ipv6_net(address); } break; case IS_IPV6_MULTICAST: result = is_ipv6_multicast(address); break; case IS_IPV6_LINKLOCAL: result = is_ipv6_link_local(address); break; case IS_ANY_CIDR: result = is_any_cidr(address_str); break; case IS_ANY_SINGLE: result = is_any_single(address_str); break; case IS_VALID_INTF_ADDR: result = is_valid_intf_address(address, address_str, allow_loopback); break; case NO_ACTION: break; case IS_ANY_HOST: /* Host vs. network address check only makes sense if prefix length is given */ if( !is_any_cidr(address_str) ) { result = RESULT_FAILURE; } else { result = is_any_host(address); } break; case IS_ANY_NET: /* Host vs. network address check only makes sense if prefix length is given */ if( !is_any_cidr(address_str) ) { result = RESULT_FAILURE; } else { result = is_any_net(address); } break; default: break; } action_count--; } /* Clean up */ free(actions); cidr_free(address); if( result == RESULT_SUCCESS ) { return(EXIT_SUCCESS); } else { return(EXIT_FAILURE); } } /* * Print help, no other side effects */ void print_help(const char* program_name) { printf("Usage: %s [STRING]\n", program_name); printf("\ Options:\n\ --is-valid Check if STRING is a valid IPv4 or IPv6 address\n\ with or without prefix length\n\ --is-any-cidr Check if STRING is a valid IPv4 or IPv6 address\n\ with prefix length\n\ --is-any-single Check if STRING is a valid single IPv4 or IPv6 address\n\ --is-any-host Check if STRING is a valid IPv4 or IPv6 host address\n\ --is-any-net Check if STRING is a valid IPv4 or IPv6 network address\n\ --is-ipv4 Check if STRING is a valid IPv4 address with mask \n\ --is-ipv4-cidr Check if STRING is a valid CIDR-formatted address \n\ --is-ipv4-single Check if STRING is a valid single address\n\ (i.e. with no mask)\n\ --is-ipv4-host Check if STRING is a host address \n\ --is-ipv4-net Check if STRING is a network address \n\ --is-ipv4-broadcast Check if STRING is a broadcast address \n\ --is-ipv4-multicast Check if STRING is a multicast address \n\ --is-ipv4-loopback Check if STRING is a loopback address \n\ --is-ipv4-link-local Check if STRING is a link-local address \n\ --is-ipv4-rfc1918 Check if STRING is a private (RFC1918) address \n\ --is-ipv6 Check if STRING is a valid IPv6 address \n\ --is-ipv6-cidr Check if STRING is a CIDR-formatted IPv6 address \n\ --is-ipv6-single Check if STRING is an IPv6 address with no mask \n\ --is-ipv6-host Check if STRING is an IPv6 host address \n\ --is-ipv6-net Check if STRING is an IPv6 network address \n\ --is-ipv6-multicast Check if STRING is an IPv6 multicast address \n\ --is-ipv6-link-local Check if STRING is an IPv6 link-local address \n\ --is-valid-intf-address Check if STRING is an IPv4 or IPv6 address that \n\ can be assigned to a network interface \n\ --allow-loopback When used with --is-valid-intf-address,\n\ makes IPv4 loopback addresses pass the check\n\ --version Print version information and exit \n\ --help Print help message and exit\n\ \n\ Exit codes:\n\ 0 if check passed,\n\ 1 if check failed,\n\ 2 if a problem occured (wrong option, internal error etc.)\n"); } /* * Print version information, no other side effects */ void print_version(void) { printf("%s %s\n\n", PACKAGE_NAME, PACKAGE_VERSION); printf("Copyright (C) SO3Group 2013.\n\ License GPLv2+: GNU GPL version 2 or later \n\ This is free software: you are free to change and redistribute it.\n\ There is NO WARRANTY, to the extent permitted by law.\n"); }