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implement maxudp under windows

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This commit is contained in:
Mark Andrews
2019-08-08 18:31:20 +10:00
parent ac50b0180b
commit 2f558854b7
4 changed files with 65 additions and 29 deletions
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78
lib/isc/win32/socket.c
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@@ -308,19 +308,20 @@ typedef struct IoCompletionInfo {
struct isc_socketmgr {
/* Not locked. */
unsigned int magic;
isc_mem_t *mctx;
isc_mutex_t lock;
isc_stats_t *stats;
unsigned int magic;
isc_mem_t *mctx;
isc_mutex_t lock;
isc_stats_t *stats;
/* Locked by manager lock. */
ISC_LIST(isc_socket_t) socklist;
ISC_LIST(isc_socket_t) socklist;
bool bShutdown;
isc_condition_t shutdown_ok;
HANDLE hIoCompletionPort;
int maxIOCPThreads;
HANDLE hIOCPThreads[MAX_IOCPTHREADS];
DWORD dwIOCPThreadIds[MAX_IOCPTHREADS];
isc_condition_t shutdown_ok;
HANDLE hIoCompletionPort;
int maxIOCPThreads;
HANDLE hIOCPThreads[MAX_IOCPTHREADS];
DWORD dwIOCPThreadIds[MAX_IOCPTHREADS];
size_t maxudp;
/*
* Debugging.
@@ -1133,12 +1134,23 @@ fill_recv(isc_socket_t *sock, isc_socketevent_t *dev) {
sock->recvbuf.from_addr_len);
if (isc_sockaddr_getport(&dev->address) == 0) {
if (isc_log_wouldlog(isc_lctx, IOEVENT_LEVEL)) {
socket_log(__LINE__, sock, &dev->address, IOEVENT,
socket_log(__LINE__, sock, &dev->address,
IOEVENT,
"dropping source port zero packet");
}
sock->recvbuf.remaining = 0;
return;
}
/*
* Simulate a firewall blocking UDP responses bigger than
* 'maxudp' bytes.
*/
if (sock->manager->maxudp != 0 &&
sock->recvbuf.remaining > sock->manager->maxudp)
{
sock->recvbuf.remaining = 0;
return;
}
} else if (sock->type == isc_sockettype_tcp) {
dev->address = sock->address;
}
@@ -1247,6 +1259,18 @@ startio_send(isc_socket_t *sock, isc_socketevent_t *dev, int *nbytes,
int status;
struct msghdr *mh;
/*
* Simulate a firewall blocking UDP responses bigger than
* 'maxudp' bytes.
*/
if (sock->type == isc_sockettype_udp &&
sock->manager->maxudp != 0 &&
dev->region.length - dev->n > sock->manager->maxudp)
{
*nbytes = dev->region.length - dev->n;
return (DOIO_SUCCESS);
}
lpo = (IoCompletionInfo *)HeapAlloc(hHeapHandle,
HEAP_ZERO_MEMORY,
sizeof(IoCompletionInfo));
@@ -2100,9 +2124,11 @@ internal_recv(isc_socket_t *sock, int nbytes)
"internal_recv: %d bytes received", nbytes);
/*
* If we got here, the I/O operation succeeded. However, we might still have removed this
* event from our notification list (or never placed it on it due to immediate completion.)
* Handle the reference counting here, and handle the cancellation event just after.
* If we got here, the I/O operation succeeded. However, we might
* still have removed this event from our notification list (or never
* placed it on it due to immediate completion.)
* Handle the reference counting here, and handle the cancellation
* event just after.
*/
INSIST(sock->pending_iocp > 0);
sock->pending_iocp--;
@@ -2110,13 +2136,15 @@ internal_recv(isc_socket_t *sock, int nbytes)
sock->pending_recv--;
/*
* The only way we could have gotten here is that our I/O has successfully completed.
* Update our pointers, and move on. The only odd case here is that we might not
* have received enough data on a TCP stream to satisfy the minimum requirements. If
* this is the case, we will re-issue the recv() call for what we need.
* The only way we could have gotten here is that our I/O has
* successfully completed. Update our pointers, and move on.
* The only odd case here is that we might not have received
* enough data on a TCP stream to satisfy the minimum requirements.
* If this is the case, we will re-issue the recv() call for what
* we need.
*
* We do check for a recv() of 0 bytes on a TCP stream. This means the remote end
* has closed.
* We do check for a recv() of 0 bytes on a TCP stream. This
* means the remote end has closed.
*/
if (nbytes == 0 && sock->type == isc_sockettype_tcp) {
send_recvdone_abort(sock, ISC_R_EOF);
@@ -2508,6 +2536,7 @@ isc_socketmgr_create2(isc_mem_t *mctx, isc_socketmgr_t **managerp,
manager->bShutdown = false;
manager->totalSockets = 0;
manager->iocp_total = 0;
manager->maxudp = 0;
*managerp = manager;
@@ -3870,9 +3899,10 @@ isc_socketmgr_createinctx(isc_mem_t *mctx, isc_socketmgr_t **managerp)
return (result);
}
/* Not implemented for win32 */
void
isc_socketmgr_maxudp(isc_socketmgr_t *manager, int maxudp) {
UNUSED(manager);
UNUSED(maxudp);
isc_socketmgr_maxudp(isc_socketmgr_t *manager, unsigned int maxudp) {
REQUIRE(VALID_MANAGER(manager));
manager->maxudp = maxudp;
}