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Code Issues Releases Wiki Activity

Fix the isc_nm_closedown() to actually close the pending connections

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1. The isc__nm_tcp_send() and isc__nm_tcp_read() was not checking
   whether the socket was still alive and scheduling reads/sends on
   closed socket.

2. The isc_nm_read(), isc_nm_send() and isc_nm_resumeread() have been
   changed to always return the error conditions via the callbacks, so
   they always succeed.  This applies to all protocols (UDP, TCP and
   TCPDNS).
This commit is contained in:
Ondřej Surý
2020-10-21 12:52:09 +02:00
committed by Evan Hunt
parent 6af08d1ca6
commit f7c82e406e
13 changed files with 203 additions and 262 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
lib/isc/netmgr/netmgr.c
View File

@@ -429,6 +429,9 @@ isc_nm_destroy(isc_nm_t **mgr0) {
#endif /* ifdef WIN32 */
}
#ifdef NETMGR_TRACE
isc__nm_dump_active(mgr);
#endif
INSIST(references == 1);
/*
@@ -1428,7 +1431,7 @@ isc__nm_uvreq_put(isc__nm_uvreq_t **req0, isc_nmsocket_t *sock) {
isc__nmsocket_detach(&sock);
}
isc_result_t
void
isc_nm_send(isc_nmhandle_t *handle, isc_region_t *region, isc_nm_cb_t cb,
void *cbarg) {
REQUIRE(VALID_NMHANDLE(handle));
@@ -1436,24 +1439,28 @@ isc_nm_send(isc_nmhandle_t *handle, isc_region_t *region, isc_nm_cb_t cb,
switch (handle->sock->type) {
case isc_nm_udpsocket:
case isc_nm_udplistener:
return (isc__nm_udp_send(handle, region, cb, cbarg));
isc__nm_udp_send(handle, region, cb, cbarg);
break;
case isc_nm_tcpsocket:
return (isc__nm_tcp_send(handle, region, cb, cbarg));
isc__nm_tcp_send(handle, region, cb, cbarg);
break;
case isc_nm_tcpdnssocket:
return (isc__nm_tcpdns_send(handle, region, cb, cbarg));
isc__nm_tcpdns_send(handle, region, cb, cbarg);
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
}
isc_result_t
void
isc_nm_read(isc_nmhandle_t *handle, isc_nm_recv_cb_t cb, void *cbarg) {
REQUIRE(VALID_NMHANDLE(handle));
switch (handle->sock->type) {
case isc_nm_tcpsocket:
return (isc__nm_tcp_read(handle, cb, cbarg));
isc__nm_tcp_read(handle, cb, cbarg);
break;
default:
INSIST(0);
ISC_UNREACHABLE();
@@ -1489,7 +1496,7 @@ isc_nm_pauseread(isc_nmhandle_t *handle) {
}
}
isc_result_t
void
isc_nm_resumeread(isc_nmhandle_t *handle) {
REQUIRE(VALID_NMHANDLE(handle));
@@ -1497,7 +1504,8 @@ isc_nm_resumeread(isc_nmhandle_t *handle) {
switch (sock->type) {
case isc_nm_tcpsocket:
return (isc__nm_tcp_resumeread(sock));
isc__nm_tcp_resumeread(sock);
break;
default:
INSIST(0);
ISC_UNREACHABLE();
@@ -1838,7 +1846,8 @@ nmhandle_dump(isc_nmhandle_t *handle) {
static void
nmsocket_dump(isc_nmsocket_t *sock) {
isc_nmhandle_t *handle;
isc_nmhandle_t *handle = NULL;
LOCK(&sock->lock);
fprintf(stderr, "\n=================\n");
fprintf(stderr, "Active socket %p, type %s, refs %lu\n", sock,
@@ -1850,25 +1859,37 @@ nmsocket_dump(isc_nmsocket_t *sock) {
backtrace_symbols_fd(sock->backtrace, sock->backtrace_size,
STDERR_FILENO);
fprintf(stderr, "\n");
fprintf(stderr, "Active handles:\n");
for (handle = ISC_LIST_HEAD(sock->active_handles); handle != NULL;
handle = ISC_LIST_NEXT(handle, active_link))
{
static bool first = true;
if (first) {
fprintf(stderr, "Active handles:\n");
first = false;
}
nmhandle_dump(handle);
}
fprintf(stderr, "\n");
UNLOCK(&sock->lock);
}
void
isc__nm_dump_active(isc_nm_t *nm) {
isc_nmsocket_t *sock;
isc_nmsocket_t *sock = NULL;
REQUIRE(VALID_NM(nm));
LOCK(&nm->lock);
fprintf(stderr, "Outstanding sockets\n");
for (sock = ISC_LIST_HEAD(nm->active_sockets); sock != NULL;
sock = ISC_LIST_NEXT(sock, active_link))
{
static bool first = true;
if (first) {
fprintf(stderr, "Outstanding sockets\n");
first = false;
}
nmsocket_dump(sock);
}
UNLOCK(&nm->lock);