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If we can do both IPv4 and IPv6, then use an IPv6 socket for all TCP

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This commit is contained in:
Bob Halley
1999-08-18 00:36:24 +00:00
parent 4033d792a8
commit a2ce103c23
1 changed files with 54 additions and 45 deletions
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99
bin/named/interfacemgr.c
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@@ -97,7 +97,7 @@ ns_interfacemgr_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
static dns_result_t
ns_interface_create(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
ns_interface_t **ifpret) {
isc_boolean_t udp_only, ns_interface_t **ifpret) {
ns_interface_t *ifp;
isc_result_t result;
@@ -172,41 +172,43 @@ ns_interface_create(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
goto addtodispatch_failure;
}
/*
* Open a TCP socket.
*/
ifp->tcpsocket = NULL;
result = isc_socket_create(mgr->socketmgr,
isc_sockaddr_pf(addr),
isc_sockettype_tcp,
&ifp->tcpsocket);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"creating TCP socket: %s",
isc_result_totext(result));
goto tcp_socket_failure;
}
result = isc_socket_bind(ifp->tcpsocket, &ifp->addr);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"binding TCP socket: %s",
isc_result_totext(result));
goto tcp_bind_failure;
}
result = isc_socket_listen(ifp->tcpsocket, 0);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"listen TCP socket: %s",
isc_result_totext(result));
goto tcp_listen_failure;
}
result = ns_clientmgr_accepttcp(mgr->clientmgr, ifp->tcpsocket,
ns_g_cpus);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"TCP ns_clientmgr_accepttcp(): %s",
isc_result_totext(result));
goto accepttcp_failure;
if (!udp_only) {
/*
* Open a TCP socket.
*/
result = isc_socket_create(mgr->socketmgr,
isc_sockaddr_pf(addr),
isc_sockettype_tcp,
&ifp->tcpsocket);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"creating TCP socket: %s",
isc_result_totext(result));
goto tcp_socket_failure;
}
result = isc_socket_bind(ifp->tcpsocket, &ifp->addr);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"binding TCP socket: %s",
isc_result_totext(result));
goto tcp_bind_failure;
}
result = isc_socket_listen(ifp->tcpsocket, 0);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"listen TCP socket: %s",
isc_result_totext(result));
goto tcp_listen_failure;
}
result = ns_clientmgr_accepttcp(mgr->clientmgr, ifp->tcpsocket,
ns_g_cpus);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"TCP ns_clientmgr_accepttcp(): %s",
isc_result_totext(result));
goto accepttcp_failure;
}
}
ISC_LIST_APPEND(mgr->interfaces, ifp, link);
@@ -255,8 +257,10 @@ ns_interface_destroy(ns_interface_t **ifpret) {
dns_dispatch_detach(&ifp->udpdispatch);
isc_socket_detach(&ifp->udpsocket);
isc_socket_cancel(ifp->tcpsocket, NULL, ISC_SOCKCANCEL_ALL);
isc_socket_detach(&ifp->tcpsocket);
if (ifp->tcpsocket != NULL) {
isc_socket_cancel(ifp->tcpsocket, NULL, ISC_SOCKCANCEL_ALL);
isc_socket_detach(&ifp->tcpsocket);
}
isc_task_detach(&ifp->task);
@@ -299,7 +303,7 @@ purge_old_interfaces(ns_interfacemgr_t *mgr) {
}
static void
do_ipv4(ns_interfacemgr_t *mgr) {
do_ipv4(ns_interfacemgr_t *mgr, isc_boolean_t udp_only) {
isc_interfaceiter_t *iter = NULL;
isc_result_t result;
@@ -344,7 +348,8 @@ do_ipv4(ns_interfacemgr_t *mgr) {
interface.name, addrstr,
ntohs(listen_addr.type.sin.sin_port));
result = ns_interface_create(mgr, &listen_addr, &ifp);
result = ns_interface_create(mgr, &listen_addr,
udp_only, &ifp);
if (result != DNS_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"IPv4: listening on interface %s"
@@ -378,7 +383,8 @@ do_ipv6(ns_interfacemgr_t *mgr) {
ifp->generation = mgr->generation;
} else {
printf("IPv6: listening (port %u)\n", listen_port);
result = ns_interface_create(mgr, &listen_addr, &ifp);
result = ns_interface_create(mgr, &listen_addr, ISC_FALSE,
&ifp);
if (result != DNS_R_SUCCESS)
UNEXPECTED_ERROR(__FILE__, __LINE__,
"IPv6: listening failed");
@@ -387,18 +393,21 @@ do_ipv6(ns_interfacemgr_t *mgr) {
void
ns_interfacemgr_scan(ns_interfacemgr_t *mgr) {
isc_boolean_t udp_only = ISC_FALSE;
REQUIRE(VALID_IFMGR(mgr));
mgr->generation++; /* Increment the generation count. */
if (isc_net_probeipv6() == ISC_R_SUCCESS) {
do_ipv6(mgr);
udp_only = ISC_TRUE;
} else
printf("IPv6: not available\n");
if (isc_net_probeipv4() == ISC_R_SUCCESS)
do_ipv4(mgr);
do_ipv4(mgr, udp_only);
else
printf("IPv4: not available\n");
if (isc_net_probeipv6() == ISC_R_SUCCESS)
do_ipv6(mgr);
else
printf("IPv6: not available\n");
/*
* Now go through the interface list and delete anything that