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path: root/erts/emulator/drivers/common/inet_drv.c
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Diffstat (limited to 'erts/emulator/drivers/common/inet_drv.c')
-rw-r--r--erts/emulator/drivers/common/inet_drv.c67
1 files changed, 60 insertions, 7 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index db052523a8..7d952b0c71 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -445,6 +445,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
driver_select(port, e, mode | (on?ERL_DRV_USE:0), on)
#define sock_select(d, flags, onoff) do { \
+ ASSERT(!onoff || !(d)->is_ignored); \
(d)->event_mask = (onoff) ? \
((d)->event_mask | (flags)) : \
((d)->event_mask & ~(flags)); \
@@ -538,6 +539,8 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
#define INET_REQ_GETIFADDRS 25
#define INET_REQ_ACCEPT 26
#define INET_REQ_LISTEN 27
+#define INET_REQ_IGNOREFD 28
+
/* TCP requests */
/* #define TCP_REQ_ACCEPT 40 MOVED */
/* #define TCP_REQ_LISTEN 41 MERGED */
@@ -725,6 +728,11 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
/* Max interface name */
#define INET_IFNAMSIZ 16
+/* INET Ignore states */
+#define INET_IGNORE_NONE 0
+#define INET_IGNORE_READ 1
+#define INET_IGNORE_WRITE 1 << 1
+
/* Max length of Erlang Term Buffer (for outputting structured terms): */
#ifdef HAVE_SCTP
#define PACKET_ERL_DRV_TERM_DATA_LEN 512
@@ -864,6 +872,9 @@ typedef struct {
double send_avg; /* average packet size sent */
subs_list empty_out_q_subs; /* Empty out queue subscribers */
+ int is_ignored; /* if a fd is ignored by from the inet_drv,
+ this should be set to true when the fd is used
+ outside of inet_drv. */
} inet_descriptor;
@@ -7344,6 +7355,8 @@ static ErlDrvData inet_start(ErlDrvPort port, int size, int protocol)
sys_memzero((char *)&desc->remote,sizeof(desc->remote));
+ desc->is_ignored = 0;
+
return (ErlDrvData)desc;
}
@@ -7626,6 +7639,33 @@ static int inet_ctl(inet_descriptor* desc, int cmd, char* buf, int len,
return ctl_reply(INET_REP_OK, tbuf, 2, rbuf, rsize);
}
+ case INET_REQ_IGNOREFD: {
+ DEBUGF(("inet_ctl(%ld): IGNOREFD, IGNORED = %d\r\n",
+ (long)desc->port,(int)*buf));
+
+ /*
+ * FD can only be ignored for connected TCP connections for now,
+ * possible to add UDP and SCTP support if needed.
+ */
+ if (!IS_CONNECTED(desc))
+ return ctl_error(ENOTCONN, rbuf, rsize);
+
+ if (!desc->stype == SOCK_STREAM)
+ return ctl_error(EINVAL, rbuf, rsize);
+
+ if (*buf == 1 && !desc->is_ignored) {
+ desc->is_ignored = INET_IGNORE_READ;
+ sock_select(desc, (FD_READ|FD_WRITE|FD_CLOSE|ERL_DRV_USE_NO_CALLBACK), 0);
+ } else if (*buf == 0 && desc->is_ignored) {
+ int flags = (FD_READ|FD_CLOSE|((desc->is_ignored & INET_IGNORE_WRITE)?FD_WRITE:0));
+ desc->is_ignored = INET_IGNORE_NONE;
+ sock_select(desc, flags, 1);
+ } else
+ return ctl_error(EINVAL, rbuf, rsize);
+
+ return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize);
+ }
+
#ifndef VXWORKS
case INET_REQ_GETSERVBYNAME: { /* L1 Name-String L2 Proto-String */
@@ -8001,6 +8041,7 @@ static int tcp_inet_ctl(ErlDrvData e, unsigned int cmd, char* buf, int len,
char** rbuf, int rsize)
{
tcp_descriptor* desc = (tcp_descriptor*)e;
+
switch(cmd) {
case INET_REQ_OPEN: { /* open socket and return internal index */
int domain;
@@ -8266,13 +8307,14 @@ static int tcp_inet_ctl(ErlDrvData e, unsigned int cmd, char* buf, int len,
if (enq_async(INETP(desc), tbuf, TCP_REQ_RECV) < 0)
return ctl_error(EALREADY, rbuf, rsize);
- if (tcp_recv(desc, n) == 0) {
+ if (INETP(desc)->is_ignored || tcp_recv(desc, n) == 0) {
if (timeout == 0)
async_error_am(INETP(desc), am_timeout);
else {
if (timeout != INET_INFINITY)
- driver_set_timer(desc->inet.port, timeout);
- sock_select(INETP(desc),(FD_READ|FD_CLOSE),1);
+ driver_set_timer(desc->inet.port, timeout);
+ if (!INETP(desc)->is_ignored)
+ sock_select(INETP(desc),(FD_READ|FD_CLOSE),1);
}
}
return ctl_reply(INET_REP_OK, tbuf, 2, rbuf, rsize);
@@ -9012,6 +9054,7 @@ static int tcp_inet_input(tcp_descriptor* desc, HANDLE event)
#ifdef DEBUG
long port = (long) desc->inet.port; /* Used after driver_exit() */
#endif
+ ASSERT(!INETP(desc)->is_ignored);
DEBUGF(("tcp_inet_input(%ld) {s=%d\r\n", port, desc->inet.s));
if (desc->inet.state == INET_STATE_ACCEPTING) {
SOCKET s;
@@ -9273,7 +9316,11 @@ static int tcp_sendv(tcp_descriptor* desc, ErlIOVec* ev)
DEBUGF(("tcp_sendv(%ld): s=%d, about to send %d,%d bytes\r\n",
(long)desc->inet.port, desc->inet.s, h_len, len));
- if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
+
+ if (INETP(desc)->is_ignored) {
+ INETP(desc)->is_ignored |= INET_IGNORE_WRITE;
+ n = 0;
+ } else if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
n = 0;
} else if (IS_SOCKET_ERROR(sock_sendv(desc->inet.s, ev->iov,
vsize, &n, 0))) {
@@ -9301,7 +9348,8 @@ static int tcp_sendv(tcp_descriptor* desc, ErlIOVec* ev)
DEBUGF(("tcp_sendv(%ld): s=%d, Send failed, queuing\r\n",
(long)desc->inet.port, desc->inet.s));
driver_enqv(ix, ev, n);
- sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
+ if (!INETP(desc)->is_ignored)
+ sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
}
return 0;
}
@@ -9366,7 +9414,10 @@ static int tcp_send(tcp_descriptor* desc, char* ptr, int len)
DEBUGF(("tcp_send(%ld): s=%d, about to send %d,%d bytes\r\n",
(long)desc->inet.port, desc->inet.s, h_len, len));
- if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
+ if (INETP(desc)->is_ignored) {
+ INETP(desc)->is_ignored |= INET_IGNORE_WRITE;
+ n = 0;
+ } else if (desc->tcp_add_flags & TCP_ADDF_DELAY_SEND) {
sock_send(desc->inet.s, buf, 0, 0);
n = 0;
} else if (IS_SOCKET_ERROR(sock_sendv(desc->inet.s,iov,2,&n,0))) {
@@ -9397,7 +9448,8 @@ static int tcp_send(tcp_descriptor* desc, char* ptr, int len)
n -= h_len;
driver_enq(ix, ptr+n, len-n);
}
- sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
+ if (!INETP(desc)->is_ignored)
+ sock_select(INETP(desc),(FD_WRITE|FD_CLOSE), 1);
}
return 0;
}
@@ -9421,6 +9473,7 @@ static int tcp_inet_output(tcp_descriptor* desc, HANDLE event)
int ret = 0;
ErlDrvPort ix = desc->inet.port;
+ ASSERT(!INETP(desc)->is_ignored);
DEBUGF(("tcp_inet_output(%ld) {s=%d\r\n",
(long)desc->inet.port, desc->inet.s));
if (desc->inet.state == INET_STATE_CONNECTING) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 23:15:16 +0000