static void dns_server_request_cb(struct evdns_server_request *req, void *data) { int i, r; const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa"; for (i = 0; i < req->nquestions; ++i) { struct in_addr ans; ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */ if (req->questions[i]->type == EVDNS_TYPE_A && req->questions[i]->dns_question_class == EVDNS_CLASS_INET && !strcasecmp(req->questions[i]->name, "zz.example.com")) { r = evdns_server_request_add_a_reply(req, req->questions[i]->name, 1, &ans.s_addr, 12345); if (r<0) dns_ok = 0; } else if (req->questions[i]->type == EVDNS_TYPE_AAAA && req->questions[i]->dns_question_class == EVDNS_CLASS_INET && !strcasecmp(req->questions[i]->name, "zz.example.com")) { char addr6[17] = "abcdefghijklmnop"; r = evdns_server_request_add_aaaa_reply(req, req->questions[i]->name, 1, addr6, 123); if (r<0) dns_ok = 0; } else if (req->questions[i]->type == EVDNS_TYPE_PTR && req->questions[i]->dns_question_class == EVDNS_CLASS_INET && !strcasecmp(req->questions[i]->name, TEST_ARPA)) { r = evdns_server_request_add_ptr_reply(req, NULL, req->questions[i]->name, "ZZ.EXAMPLE.COM", 54321); if (r<0) dns_ok = 0; } else if (req->questions[i]->type == EVDNS_TYPE_A && req->questions[i]->dns_question_class == EVDNS_CLASS_INET && !strcasecmp(req->questions[i]->name, "drop.example.com")) { if (evdns_server_request_drop(req)<0) dns_ok = 0; return; } else { fprintf(stdout, "Unexpected question %d %d \"%s\" ", req->questions[i]->type, req->questions[i]->dns_question_class, req->questions[i]->name); dns_ok = 0; } } r = evdns_server_request_respond(req, 0); if (r<0) { fprintf(stdout, "Couldn't send reply. "); dns_ok = 0; } }
/** Tell the dns request waiting for an answer on <b>conn</b> that we have an * answer of type <b>answer_type</b> (RESOLVE_TYPE_IPV4/IPV6/ERR), of length * <b>answer_len</b>, in <b>answer</b>, with TTL <b>ttl</b>. Doesn't do * any caching; that's handled elsewhere. */ void dnsserv_resolved(entry_connection_t *conn, int answer_type, size_t answer_len, const char *answer, int ttl) { struct evdns_server_request *req = conn->dns_server_request; const char *name; int err = DNS_ERR_NONE; if (!req) return; name = evdns_get_orig_address(req, answer_type, conn->socks_request->address); /* XXXX Re-do; this is dumb. */ if (ttl < 60) ttl = 60; /* The evdns interface is: add a bunch of reply items (corresponding to one * or more of the questions in the request); then, call * evdns_server_request_respond. */ if (answer_type == RESOLVED_TYPE_IPV6) { evdns_server_request_add_aaaa_reply(req, name, 1, answer, ttl); } else if (answer_type == RESOLVED_TYPE_IPV4 && answer_len == 4 && conn->socks_request->command == SOCKS_COMMAND_RESOLVE) { evdns_server_request_add_a_reply(req, name, 1, answer, ttl); } else if (answer_type == RESOLVED_TYPE_HOSTNAME && answer_len < 256 && conn->socks_request->command == SOCKS_COMMAND_RESOLVE_PTR) { char *ans = tor_strndup(answer, answer_len); evdns_server_request_add_ptr_reply(req, NULL, name, ans, ttl); tor_free(ans); } else if (answer_type == RESOLVED_TYPE_ERROR) { err = DNS_ERR_NOTEXIST; } else { /* answer_type == RESOLVED_TYPE_ERROR_TRANSIENT */ err = DNS_ERR_SERVERFAILED; } evdns_server_request_respond(req, err); conn->dns_server_request = NULL; }
static void dns_server_request_cb(struct evdns_server_request *req, void *data) { int i, r; const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa"; const char TEST_IN6[] = "f.e.f.e." "0.0.0.0." "0.0.0.0." "1.1.1.1." "a.a.a.a." "0.0.0.0." "0.0.0.0." "0.f.f.f.ip6.arpa"; for (i = 0; i < req->nquestions; ++i) { const int qtype = req->questions[i]->type; const int qclass = req->questions[i]->dns_question_class; const char *qname = req->questions[i]->name; struct in_addr ans; ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */ if (qtype == EVDNS_TYPE_A && qclass == EVDNS_CLASS_INET && !evutil_ascii_strcasecmp(qname, "zz.example.com")) { r = evdns_server_request_add_a_reply(req, qname, 1, &ans.s_addr, 12345); if (r<0) dns_ok = 0; } else if (qtype == EVDNS_TYPE_AAAA && qclass == EVDNS_CLASS_INET && !evutil_ascii_strcasecmp(qname, "zz.example.com")) { char addr6[17] = "abcdefghijklmnop"; r = evdns_server_request_add_aaaa_reply(req, qname, 1, addr6, 123); if (r<0) dns_ok = 0; } else if (qtype == EVDNS_TYPE_PTR && qclass == EVDNS_CLASS_INET && !evutil_ascii_strcasecmp(qname, TEST_ARPA)) { r = evdns_server_request_add_ptr_reply(req, NULL, qname, "ZZ.EXAMPLE.COM", 54321); if (r<0) dns_ok = 0; } else if (qtype == EVDNS_TYPE_PTR && qclass == EVDNS_CLASS_INET && !evutil_ascii_strcasecmp(qname, TEST_IN6)){ r = evdns_server_request_add_ptr_reply(req, NULL, qname, "ZZ-INET6.EXAMPLE.COM", 54322); if (r<0) dns_ok = 0; } else if (qtype == EVDNS_TYPE_A && qclass == EVDNS_CLASS_INET && !evutil_ascii_strcasecmp(qname, "drop.example.com")) { if (evdns_server_request_drop(req)<0) dns_ok = 0; return; } else { printf("Unexpected question %d %d \"%s\" ", qtype, qclass, qname); dns_ok = 0; } } r = evdns_server_request_respond(req, 0); if (r<0) { printf("Couldn't send reply. "); dns_ok = 0; } }