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Diffstat (limited to 'fluent-bit/lib/c-ares-1.19.1/src/tools/ahost.c')
| -rw-r--r-- | fluent-bit/lib/c-ares-1.19.1/src/tools/ahost.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/fluent-bit/lib/c-ares-1.19.1/src/tools/ahost.c b/fluent-bit/lib/c-ares-1.19.1/src/tools/ahost.c new file mode 100644 index 000000000..8ac210669 --- /dev/null +++ b/fluent-bit/lib/c-ares-1.19.1/src/tools/ahost.c @@ -0,0 +1,228 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#include "ares_setup.h" + +#if !defined(WIN32) || defined(WATT32) +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#endif + +#ifdef HAVE_STRINGS_H +#include <strings.h> +#endif + +#include "ares.h" +#include "ares_dns.h" +#include "ares_getopt.h" +#include "ares_ipv6.h" +#include "ares_nowarn.h" + +#ifndef HAVE_STRDUP +# include "ares_strdup.h" +# define strdup(ptr) ares_strdup(ptr) +#endif + +#ifndef HAVE_STRCASECMP +# include "ares_strcasecmp.h" +# define strcasecmp(p1,p2) ares_strcasecmp(p1,p2) +#endif + +#ifndef HAVE_STRNCASECMP +# include "ares_strcasecmp.h" +# define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n) +#endif + +static void callback(void *arg, int status, int timeouts, struct hostent *host); +static void usage(void); +static void print_help_info_ahost(void); + +int main(int argc, char **argv) +{ + struct ares_options options; + int optmask = 0; + ares_channel channel; + int status, nfds, c, addr_family = AF_INET; + fd_set read_fds, write_fds; + struct timeval *tvp, tv; + struct in_addr addr4; + struct ares_in6_addr addr6; + +#ifdef USE_WINSOCK + WORD wVersionRequested = MAKEWORD(USE_WINSOCK,USE_WINSOCK); + WSADATA wsaData; + WSAStartup(wVersionRequested, &wsaData); +#endif + + memset(&options, 0, sizeof(options)); + + status = ares_library_init(ARES_LIB_INIT_ALL); + if (status != ARES_SUCCESS) + { + fprintf(stderr, "ares_library_init: %s\n", ares_strerror(status)); + return 1; + } + + while ((c = ares_getopt(argc,argv,"dt:h?s:")) != -1) + { + switch (c) + { + case 'd': +#ifdef WATT32 + dbug_init(); +#endif + break; + case 's': + optmask |= ARES_OPT_DOMAINS; + options.ndomains++; + options.domains = (char **)realloc(options.domains, + options.ndomains * sizeof(char *)); + options.domains[options.ndomains - 1] = strdup(optarg); + break; + case 't': + if (!strcasecmp(optarg,"a")) + addr_family = AF_INET; + else if (!strcasecmp(optarg,"aaaa")) + addr_family = AF_INET6; + else if (!strcasecmp(optarg,"u")) + addr_family = AF_UNSPEC; + else + usage(); + break; + case 'h': + print_help_info_ahost(); + break; + case '?': + print_help_info_ahost(); + break; + default: + usage(); + break; + } + } + + argc -= optind; + argv += optind; + if (argc < 1) + usage(); + + status = ares_init_options(&channel, &options, optmask); + if (status != ARES_SUCCESS) + { + fprintf(stderr, "ares_init: %s\n", ares_strerror(status)); + return 1; + } + + /* Initiate the queries, one per command-line argument. */ + for ( ; *argv; argv++) + { + if (ares_inet_pton(AF_INET, *argv, &addr4) == 1) + { + ares_gethostbyaddr(channel, &addr4, sizeof(addr4), AF_INET, callback, + *argv); + } + else if (ares_inet_pton(AF_INET6, *argv, &addr6) == 1) + { + ares_gethostbyaddr(channel, &addr6, sizeof(addr6), AF_INET6, callback, + *argv); + } + else + { + ares_gethostbyname(channel, *argv, addr_family, callback, *argv); + } + } + + /* Wait for all queries to complete. */ + for (;;) + { + int res; + FD_ZERO(&read_fds); + FD_ZERO(&write_fds); + nfds = ares_fds(channel, &read_fds, &write_fds); + if (nfds == 0) + break; + tvp = ares_timeout(channel, NULL, &tv); + res = select(nfds, &read_fds, &write_fds, NULL, tvp); + if (-1 == res) + break; + ares_process(channel, &read_fds, &write_fds); + } + + ares_destroy(channel); + + ares_library_cleanup(); + +#ifdef USE_WINSOCK + WSACleanup(); +#endif + + return 0; +} + +static void callback(void *arg, int status, int timeouts, struct hostent *host) +{ + char **p; + + (void)timeouts; + + if (status != ARES_SUCCESS) + { + fprintf(stderr, "%s: %s\n", (char *) arg, ares_strerror(status)); + return; + } + + for (p = host->h_addr_list; *p; p++) + { + char addr_buf[46] = "??"; + + ares_inet_ntop(host->h_addrtype, *p, addr_buf, sizeof(addr_buf)); + printf("%-32s\t%s", host->h_name, addr_buf); +#if 0 + if (host->h_aliases[0]) + { + int i; + + printf (", Aliases: "); + for (i = 0; host->h_aliases[i]; i++) + printf("%s ", host->h_aliases[i]); + } +#endif + puts(""); + } +} + +static void usage(void) +{ + fprintf(stderr, "usage: ahost [-h] [-d] [-s {domain}] [-t {a|aaaa|u}] {host|addr} ...\n"); + exit(1); +} + +/* Information from the man page. Formatting taken from man -h */ +static void print_help_info_ahost(void) { + printf("ahost, version %s\n\n", ARES_VERSION_STR); + printf("usage: ahost [-h] [-d] [[-s domain] ...] [-t a|aaaa|u] host|addr ...\n\n" + " h : Display this help and exit.\n" + " d : Print some extra debugging output.\n\n" + " s domain : Specify the domain to search instead of using the default values\n" + " from /etc/resolv.conf. This option only has an effect on\n" + " platforms that use /etc/resolv.conf for DNS configuration;\n" + " it has no effect on other platforms (such as Win32 or Android).\n\n" + " t type : If type is \"a\", print the A record (default).\n" + " If type is \"aaaa\", print the AAAA record.\n" + " If type is \"u\", look for either AAAA or A record (in that order).\n\n"); + exit(0); +} |