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Diffstat (limited to '')
| -rw-r--r-- | extra/resolveip.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/extra/resolveip.c b/extra/resolveip.c new file mode 100644 index 00000000..890912d9 --- /dev/null +++ b/extra/resolveip.c @@ -0,0 +1,219 @@ +/* + Copyright (c) 2000, 2010, Oracle and/or its affiliates + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + 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, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ + +/* Resolves IP's to hostname and hostnames to IP's */ + +#define RESOLVE_VERSION "2.3" + +#include <my_global.h> +#include <m_ctype.h> +#include <my_sys.h> +#include <m_string.h> +#ifndef WIN32 +# include <sys/types.h> +# include <sys/socket.h> +# include <netinet/in.h> +# include <arpa/inet.h> +# include <netdb.h> +#endif +#include <my_net.h> +#include <my_getopt.h> + +#if !defined(_AIX) && !defined(h_errno) +extern int h_errno; +#endif + +static my_bool silent; + +static struct my_option my_long_options[] = +{ + {"help", '?', "Displays this help and exits.", + 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, + {"info", 'I', "Synonym for --help.", + 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, + {"silent", 's', "Be more silent.", &silent, &silent, + 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0}, + {"version", 'V', "Displays version information and exits.", + 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, + { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0} +}; + + +static void print_version(void) +{ + printf("%s Ver %s, for %s (%s)\n",my_progname,RESOLVE_VERSION, + SYSTEM_TYPE,MACHINE_TYPE); +} + + +static void usage(void) +{ + print_version(); + puts("This software comes with ABSOLUTELY NO WARRANTY. This is free software,\nand you are welcome to modify and redistribute it under the GPL license\n"); + puts("Get hostname based on IP-address or IP-address based on hostname.\n"); + printf("Usage: %s [OPTIONS] hostname or IP-address\n",my_progname); + my_print_help(my_long_options); + my_print_variables(my_long_options); +} + + +static my_bool +get_one_option(const struct my_option *opt, + const char *argument __attribute__((unused)), + const char *filename __attribute__((unused))) +{ + switch (opt->id) { + case 'V': print_version(); exit(0); + case 'I': + case '?': + usage(); + my_end(0); + exit(0); + } + return 0; +} + +/*static char * load_default_groups[]= { "resolveip","client",0 }; */ + +static int get_options(int *argc,char ***argv) +{ + int ho_error; + + if ((ho_error=handle_options(argc, argv, my_long_options, get_one_option))) + { + my_end(0); + exit(ho_error); + } + + if (*argc == 0) + { + usage(); + return 1; + } + return 0; +} /* get_options */ + + + +int main(int argc, char **argv) +{ + struct hostent *hpaddr; + in_addr_t taddr; + char *ip,**q; + int error=0; + + MY_INIT(argv[0]); + + if (get_options(&argc,&argv)) + { + my_end(0); + exit(1); + } + + while (argc--) + { + my_bool do_more; +#ifndef WIN32 + struct in_addr addr; +#endif + ip = *argv++; + + /* Not compatible with IPv6! Probably should use getnameinfo(). */ +#ifdef WIN32 + taddr = inet_addr(ip); + do_more= (taddr != INADDR_NONE); +#else + if ((do_more= (inet_aton(ip, &addr) != 0))) + taddr= addr.s_addr; +#endif + if (do_more) + { + if (taddr == htonl(INADDR_BROADCAST)) + { + puts("Broadcast"); + continue; + } + if (taddr == htonl(INADDR_ANY)) + { + if (!taddr) + puts("Null-IP-Addr"); + else + puts("Old-Bcast"); + continue; + } + + hpaddr = gethostbyaddr((char*) &(taddr), sizeof(struct in_addr),AF_INET); + if (hpaddr) + { + if (silent) + puts(hpaddr->h_name); + else + { + printf ("Host name of %s is %s", ip,hpaddr->h_name); + for (q = hpaddr->h_aliases; *q != 0; q++) + (void) printf(", %s", *q); + puts(""); + } + } + else + { + error=2; + fprintf(stderr,"%s: Unable to find hostname for '%s'\n",my_progname, + ip); + } + } + else + { + hpaddr = gethostbyname(ip); + if (!hpaddr) + { + const char *err; + fprintf(stderr,"%s: Unable to find hostid for '%s'",my_progname,ip); + switch (h_errno) { + case HOST_NOT_FOUND: err="host not found"; break; + case TRY_AGAIN: err="try again"; break; + case NO_RECOVERY: err="no recovery"; break; + case NO_DATA: err="no_data"; break; + default: err=0; + } + if (err) + fprintf(stderr,": %s\n",err); + else + fprintf(stderr,"\n"); + error=2; + } + else if (silent) + { + struct in_addr in; + memcpy((char*) &in.s_addr, (char*) *hpaddr->h_addr_list, + sizeof (in.s_addr)); + puts(inet_ntoa(in)); + } + else + { + char **p; + for (p = hpaddr->h_addr_list; *p != 0; p++) + { + struct in_addr in; + memcpy(&in.s_addr, *p, sizeof (in.s_addr)); + printf ("IP address of %s is %s\n",ip,inet_ntoa(in)); + } + } + } + } + my_end(0); + exit(error); +} |