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Diffstat (limited to 'protocols/Telegram/libevent/sample/dns-example.c')
-rw-r--r--protocols/Telegram/libevent/sample/dns-example.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/protocols/Telegram/libevent/sample/dns-example.c b/protocols/Telegram/libevent/sample/dns-example.c
deleted file mode 100644
index fb705664aa..0000000000
--- a/protocols/Telegram/libevent/sample/dns-example.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/*
- This example code shows how to use the high-level, low-level, and
- server-level interfaces of evdns.
-
- XXX It's pretty ugly and should probably be cleaned up.
- */
-
-#include <event2/event-config.h>
-
-/* Compatibility for possible missing IPv6 declarations */
-#include "../ipv6-internal.h"
-
-#include <sys/types.h>
-
-#ifdef EVENT__HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#ifdef _WIN32
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#include <getopt.h>
-#else
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#endif
-
-#include <event2/event.h>
-#include <event2/dns.h>
-#include <event2/dns_struct.h>
-#include <event2/util.h>
-
-#ifdef EVENT__HAVE_NETINET_IN6_H
-#include <netinet/in6.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define u32 ev_uint32_t
-#define u8 ev_uint8_t
-
-static const char *
-debug_ntoa(u32 address)
-{
- static char buf[32];
- u32 a = ntohl(address);
- evutil_snprintf(buf, sizeof(buf), "%d.%d.%d.%d",
- (int)(u8)((a>>24)&0xff),
- (int)(u8)((a>>16)&0xff),
- (int)(u8)((a>>8 )&0xff),
- (int)(u8)((a )&0xff));
- return buf;
-}
-
-static void
-main_callback(int result, char type, int count, int ttl,
- void *addrs, void *orig) {
- char *n = (char*)orig;
- int i;
- for (i = 0; i < count; ++i) {
- if (type == DNS_IPv4_A) {
- printf("%s: %s\n", n, debug_ntoa(((u32*)addrs)[i]));
- } else if (type == DNS_PTR) {
- printf("%s: %s\n", n, ((char**)addrs)[i]);
- }
- }
- if (!count) {
- printf("%s: No answer (%d)\n", n, result);
- }
- fflush(stdout);
-}
-
-static void
-gai_callback(int err, struct evutil_addrinfo *ai, void *arg)
-{
- const char *name = arg;
- int i;
- if (err) {
- printf("%s: %s\n", name, evutil_gai_strerror(err));
- }
- if (ai && ai->ai_canonname)
- printf(" %s ==> %s\n", name, ai->ai_canonname);
- for (i=0; ai; ai = ai->ai_next, ++i) {
- char buf[128];
- if (ai->ai_family == PF_INET) {
- struct sockaddr_in *sin =
- (struct sockaddr_in*)ai->ai_addr;
- evutil_inet_ntop(AF_INET, &sin->sin_addr, buf,
- sizeof(buf));
- printf("[%d] %s: %s\n",i,name,buf);
- } else {
- struct sockaddr_in6 *sin6 =
- (struct sockaddr_in6*)ai->ai_addr;
- evutil_inet_ntop(AF_INET6, &sin6->sin6_addr, buf,
- sizeof(buf));
- printf("[%d] %s: %s\n",i,name,buf);
- }
- }
-}
-
-static void
-evdns_server_callback(struct evdns_server_request *req, void *data)
-{
- int i, r;
- (void)data;
- /* dummy; give 192.168.11.11 as an answer for all A questions,
- * give foo.bar.example.com as an answer for all PTR questions. */
- for (i = 0; i < req->nquestions; ++i) {
- u32 ans = htonl(0xc0a80b0bUL);
- if (req->questions[i]->type == EVDNS_TYPE_A &&
- req->questions[i]->dns_question_class == EVDNS_CLASS_INET) {
- printf(" -- replying for %s (A)\n", req->questions[i]->name);
- r = evdns_server_request_add_a_reply(req, req->questions[i]->name,
- 1, &ans, 10);
- if (r<0)
- printf("eeep, didn't work.\n");
- } else if (req->questions[i]->type == EVDNS_TYPE_PTR &&
- req->questions[i]->dns_question_class == EVDNS_CLASS_INET) {
- printf(" -- replying for %s (PTR)\n", req->questions[i]->name);
- r = evdns_server_request_add_ptr_reply(req, NULL, req->questions[i]->name,
- "foo.bar.example.com", 10);
- if (r<0)
- printf("ugh, no luck");
- } else {
- printf(" -- skipping %s [%d %d]\n", req->questions[i]->name,
- req->questions[i]->type, req->questions[i]->dns_question_class);
- }
- }
-
- r = evdns_server_request_respond(req, 0);
- if (r<0)
- printf("eeek, couldn't send reply.\n");
-}
-
-static int verbose = 0;
-
-static void
-logfn(int is_warn, const char *msg) {
- if (!is_warn && !verbose)
- return;
- fprintf(stderr, "%s: %s\n", is_warn?"WARN":"INFO", msg);
-}
-
-int
-main(int c, char **v) {
- struct options {
- int reverse;
- int use_getaddrinfo;
- int servertest;
- const char *resolv_conf;
- const char *ns;
- };
- struct options o;
- char opt;
- struct event_base *event_base = NULL;
- struct evdns_base *evdns_base = NULL;
-
- memset(&o, 0, sizeof(o));
-
- if (c < 2) {
- fprintf(stderr, "syntax: %s [-x] [-v] [-c resolv.conf] [-s ns] hostname\n", v[0]);
- fprintf(stderr, "syntax: %s [-T]\n", v[0]);
- return 1;
- }
-
- while ((opt = getopt(c, v, "xvc:Ts:")) != -1) {
- switch (opt) {
- case 'x': o.reverse = 1; break;
- case 'v': ++verbose; break;
- case 'g': o.use_getaddrinfo = 1; break;
- case 'T': o.servertest = 1; break;
- case 'c': o.resolv_conf = optarg; break;
- case 's': o.ns = optarg; break;
- default : fprintf(stderr, "Unknown option %c\n", opt); break;
- }
- }
-
-#ifdef _WIN32
- {
- WSADATA WSAData;
- WSAStartup(0x101, &WSAData);
- }
-#endif
-
- event_base = event_base_new();
- evdns_base = evdns_base_new(event_base, EVDNS_BASE_DISABLE_WHEN_INACTIVE);
- evdns_set_log_fn(logfn);
-
- if (o.servertest) {
- evutil_socket_t sock;
- struct sockaddr_in my_addr;
- sock = socket(PF_INET, SOCK_DGRAM, 0);
- if (sock == -1) {
- perror("socket");
- exit(1);
- }
- evutil_make_socket_nonblocking(sock);
- my_addr.sin_family = AF_INET;
- my_addr.sin_port = htons(10053);
- my_addr.sin_addr.s_addr = INADDR_ANY;
- if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr))<0) {
- perror("bind");
- exit(1);
- }
- evdns_add_server_port_with_base(event_base, sock, 0, evdns_server_callback, NULL);
- }
- if (optind < c) {
- int res;
-#ifdef _WIN32
- if (o.resolv_conf == NULL && !o.ns)
- res = evdns_base_config_windows_nameservers(evdns_base);
- else
-#endif
- if (o.ns)
- res = evdns_base_nameserver_ip_add(evdns_base, o.ns);
- else
- res = evdns_base_resolv_conf_parse(evdns_base,
- DNS_OPTION_NAMESERVERS, o.resolv_conf);
-
- if (res < 0) {
- fprintf(stderr, "Couldn't configure nameservers");
- return 1;
- }
- }
-
- printf("EVUTIL_AI_CANONNAME in example = %d\n", EVUTIL_AI_CANONNAME);
- for (; optind < c; ++optind) {
- if (o.reverse) {
- struct in_addr addr;
- if (evutil_inet_pton(AF_INET, v[optind], &addr)!=1) {
- fprintf(stderr, "Skipping non-IP %s\n", v[optind]);
- continue;
- }
- fprintf(stderr, "resolving %s...\n",v[optind]);
- evdns_base_resolve_reverse(evdns_base, &addr, 0, main_callback, v[optind]);
- } else if (o.use_getaddrinfo) {
- struct evutil_addrinfo hints;
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = PF_UNSPEC;
- hints.ai_protocol = IPPROTO_TCP;
- hints.ai_flags = EVUTIL_AI_CANONNAME;
- fprintf(stderr, "resolving (fwd) %s...\n",v[optind]);
- evdns_getaddrinfo(evdns_base, v[optind], NULL, &hints,
- gai_callback, v[optind]);
- } else {
- fprintf(stderr, "resolving (fwd) %s...\n",v[optind]);
- evdns_base_resolve_ipv4(evdns_base, v[optind], 0, main_callback, v[optind]);
- }
- }
- fflush(stdout);
- event_base_dispatch(event_base);
- return 0;
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 09:45:49 +0000