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https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-30 22:15:20 +00:00
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@@ -25,6 +25,7 @@
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#include <isc/app.h>
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#include <isc/assertions.h>
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#include <isc/error.h>
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#include <isc/inet.h>
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#include <isc/mem.h>
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#include <isc/task.h>
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#include <isc/thread.h>
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@@ -34,6 +35,11 @@
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#include <dns/dispatch.h>
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#include <dns/message.h>
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#include <dns/rdatalist.h>
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#include <dns/rdataset.h>
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#include <dns/rdata.h>
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#include <dns/rdataclass.h>
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#include <dns/rdatatype.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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@@ -49,11 +55,16 @@ isc_taskmgr_t *manager;
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isc_socketmgr_t *socketmgr;
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dns_dispatch_t *disp;
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isc_task_t *t0, *t1, *t2;
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isc_buffer_t render;
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unsigned char render_buffer[1024];
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dns_rdataset_t rdataset;
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dns_rdatalist_t rdatalist;
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void got_request(isc_task_t *, isc_event_t *);
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void got_response(isc_task_t *, isc_event_t *);
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void start_response(void);
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static inline void CHECKRESULT(dns_result_t, char *);
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void send_done(isc_task_t *, isc_event_t *);
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static inline void
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CHECKRESULT(dns_result_t result, char *msg)
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@@ -65,6 +76,28 @@ CHECKRESULT(dns_result_t result, char *msg)
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}
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}
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void
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send_done(isc_task_t *task, isc_event_t *ev_in)
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{
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isc_socketevent_t *ev = (isc_socketevent_t *)ev_in;
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dns_dispentry_t *resp = (dns_dispentry_t *)ev_in->arg;
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if (ev->result == ISC_R_SUCCESS) {
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printf("Send done (SUCCESS)\n");
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isc_event_free(&ev_in);
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return;
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}
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CHECKRESULT(ev->result, "send_done got event");
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isc_event_free(&ev_in);
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printf("--- removing response (FAILURE)\n");
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dns_dispatch_removeresponse(disp, &resp, NULL);
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isc_app_shutdown();
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}
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void
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start_response(void)
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{
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@@ -72,17 +105,95 @@ start_response(void)
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dns_messageid_t id;
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isc_sockaddr_t from;
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dns_message_t *msg;
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isc_result_t result;
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dns_name_t name;
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unsigned char namebuf[255];
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isc_buffer_t target;
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isc_buffer_t source;
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isc_region_t region;
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#define QUESTION "flame.org."
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isc_buffer_init(&source, QUESTION, strlen(QUESTION),
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ISC_BUFFERTYPE_TEXT);
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isc_buffer_add(&source, strlen(QUESTION));
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isc_buffer_setactive(&source, strlen(QUESTION));
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isc_buffer_init(&target, namebuf, sizeof(namebuf),
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ISC_BUFFERTYPE_BINARY);
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dns_name_init(&name, NULL);
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result = dns_name_fromtext(&name, &source, dns_rootname, ISC_FALSE,
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&target);
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CHECKRESULT(result, "dns_name_fromtext()");
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memset(&from, 0, sizeof(from));
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from.length = sizeof(struct sockaddr_in);
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from.type.sa.sa_len = sizeof(struct sockaddr_in);
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from.type.sin.sin_port = htons(53);
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from.type.sa.sa_family = AF_INET;
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RUNTIME_CHECK(isc_inet_aton("204.152.184.97",
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&from.type.sin.sin_addr) == 1);
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msg = NULL;
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result = dns_message_create(mctx, &msg, DNS_MESSAGE_INTENTRENDER);
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CHECKRESULT(result, "dns_message_create()");
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dns_message_addname(msg, &name, DNS_SECTION_QUESTION);
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rdatalist.rdclass = dns_rdataclass_in;
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rdatalist.type = dns_rdatatype_a;
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rdatalist.ttl = 0;
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ISC_LIST_INIT(rdatalist.rdata);
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dns_rdataset_init(&rdataset);
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result = dns_rdatalist_tordataset(&rdatalist, &rdataset);
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CHECKRESULT(result, "dns_rdatalist_tordataset()");
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ISC_LIST_APPEND(name.list, &rdataset, link);
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result = printmessage(msg);
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CHECKRESULT(result, "printmessage()");
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isc_buffer_init(&render, render_buffer, sizeof(render_buffer),
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ISC_BUFFERTYPE_BINARY);
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result = dns_message_renderbegin(msg, &render);
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CHECKRESULT(result, "dns_message_renderbegin()");
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rdataset.attributes |= DNS_RDATASETATTR_QUESTION;
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result = dns_message_rendersection(msg, DNS_SECTION_QUESTION, 0, 0);
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CHECKRESULT(result, "dns_message_rendersection(QUESTION)");
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result = dns_message_rendersection(msg, DNS_SECTION_ANSWER, 0, 0);
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CHECKRESULT(result, "dns_message_rendersection(ANSWER)");
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result = dns_message_rendersection(msg, DNS_SECTION_ADDITIONAL, 0, 0);
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CHECKRESULT(result, "dns_message_rendersection(ADDITIONAL)");
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result = dns_message_rendersection(msg, DNS_SECTION_AUTHORITY, 0, 0);
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CHECKRESULT(result, "dns_message_rendersection(AUTHORITY)");
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printf("--- adding response\n");
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resp = NULL;
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RUNTIME_CHECK(dns_dispatch_addresponse(disp, &from, t2,
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got_response, NULL,
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&id, &resp)
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== ISC_R_SUCCESS);
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result = dns_dispatch_addresponse(disp, &from, t2, got_response, NULL,
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&id, &resp);
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CHECKRESULT(result, "dns_dispatch_addresponse");
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printf("Assigned MessageID %d\n", id);
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printf("--- removing response\n");
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dns_dispatch_removeresponse(disp, &resp, NULL);
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isc_app_shutdown();
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msg->opcode = dns_opcode_query;
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msg->rcode = dns_rcode_noerror;
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msg->flags = DNS_MESSAGEFLAG_RD;
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msg->id = id;
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result = dns_message_renderend(msg);
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CHECKRESULT(result, "dns_message_renderend");
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dns_message_destroy(&msg);
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isc_buffer_used(&render, ®ion);
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result = isc_socket_sendto(dns_dispatch_getsocket(disp), ®ion,
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t2, send_done, resp, &from);
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CHECKRESULT(result, "isc_socket_sendto()");
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}
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void
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@@ -90,8 +201,28 @@ got_response(isc_task_t *task, isc_event_t *ev_in)
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{
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dns_dispatchevent_t *ev = (dns_dispatchevent_t *)ev_in;
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dns_dispentry_t *resp = ev->sender;
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dns_message_t *msg;
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isc_result_t result;
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dns_dispatch_freeevent(disp, resp, &ev);
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printf("App: Got response (id %d). Result: %s\n",
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ev->id, isc_result_totext(ev->result));
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msg = NULL;
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result = dns_message_create(mctx, &msg, DNS_MESSAGE_INTENTPARSE);
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CHECKRESULT(result, "dns_message_create() failed");
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result = dns_message_parse(msg, &ev->buffer);
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CHECKRESULT(result, "dns_message_parse() failed");
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result = printmessage(msg);
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CHECKRESULT(result, "printmessage() failed");
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dns_message_destroy(&msg);
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printf("--- removing response\n");
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dns_dispatch_removeresponse(disp, &resp, &ev);
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isc_app_shutdown();
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}
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void
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@@ -103,7 +234,7 @@ got_request(isc_task_t *task, isc_event_t *ev_in)
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dns_message_t *msg;
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dns_result_t result;
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printf("App: Got packet. Result: %s\n",
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printf("App: Got request. Result: %s\n",
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isc_result_totext(ev->result));
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if (ev->result != DNS_R_SUCCESS) {
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@@ -125,7 +256,7 @@ got_request(isc_task_t *task, isc_event_t *ev_in)
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dns_message_destroy(&msg);
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sleep (2);
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sleep (1);
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printf("App: Ready.\n");
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cnt++;
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@@ -133,7 +264,6 @@ got_request(isc_task_t *task, isc_event_t *ev_in)
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case 6:
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printf("--- removing request\n");
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dns_dispatch_removerequest(disp, &resp, &ev);
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printf("--- destroying dispatcher\n");
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start_response();
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break;
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@@ -206,7 +336,7 @@ main(int argc, char *argv[])
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*/
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disp = NULL;
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RUNTIME_CHECK(dns_dispatch_create(mctx, s0, t0, 512, 6, 1024,
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16, &disp) == ISC_R_SUCCESS);
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4, &disp) == ISC_R_SUCCESS);
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resp = NULL;
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RUNTIME_CHECK(dns_dispatch_addrequest(disp, t1, got_request, NULL,
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@@ -231,7 +361,7 @@ main(int argc, char *argv[])
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fprintf(stderr, "Destroying task manager\n");
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isc_taskmgr_destroy(&manager);
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isc_mem_stats(mctx, stdout);
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isc_mem_stats(mctx, stderr);
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isc_mem_destroy(&mctx);
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isc_app_finish();
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