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authorZandra Hird <[email protected]>2015-06-02 15:40:58 +0200
committerZandra Hird <[email protected]>2015-06-02 15:40:58 +0200
commitb4774c9d55a1606a1abc726e0f7ce563065284b3 (patch)
tree8f6a8834dc96f5e47cab64da9337efbb90f076f1 /erts/emulator/drivers/common
parent65bf43e82a8ec731aafdbac74d41d65b63c7f49c (diff)
parent25bd6312491fc9153a16f74b5d1d39609426ae60 (diff)
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Merge branch 'nybek/fix_gen_tcp_shutdown'
OTP-12797
Diffstat (limited to 'erts/emulator/drivers/common')
-rw-r--r--erts/emulator/drivers/common/inet_drv.c58
1 files changed, 55 insertions, 3 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 5196eb51c6..e001f31932 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -293,6 +293,10 @@ static BOOL (WINAPI *fpSetHandleInformation)(HANDLE,DWORD,DWORD);
static unsigned long zero_value = 0;
static unsigned long one_value = 1;
+#define TCP_SHUT_WR SD_SEND
+#define TCP_SHUT_RD SD_RECEIVE
+#define TCP_SHUT_RDWR SD_BOTH
+
#elif defined (__OSE__)
/*
@@ -421,6 +425,10 @@ typedef unsigned long u_long;
inet_driver_select((d), (flags), (onoff)); \
} while(0)
+#define TCP_SHUT_WR SHUT_WR
+#define TCP_SHUT_RD SHUT_RD
+#define TCP_SHUT_RDWR SHUT_RDWR
+
#else /* !__OSE__ && !__WIN32__ */
#include <sys/time.h>
@@ -691,6 +699,9 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
inet_driver_select((d)->port, (ErlDrvEvent)(long)(d)->event, (flags), (onoff)); \
} while(0)
+#define TCP_SHUT_WR SHUT_WR
+#define TCP_SHUT_RD SHUT_RD
+#define TCP_SHUT_RDWR SHUT_RDWR
#endif /* !__WIN32__ && !__OSE__ */
@@ -820,6 +831,10 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
#define TCP_ADDF_CLOSE_SENT 2 /* Close sent (active mode only) */
#define TCP_ADDF_DELAYED_CLOSE_RECV 4 /* If receive fails, report {error,closed} (passive mode) */
#define TCP_ADDF_DELAYED_CLOSE_SEND 8 /* If send fails, report {error,closed} (passive mode) */
+#define TCP_ADDF_PENDING_SHUT_WR 16 /* Call shutdown(sock, SHUT_WR) when queue empties */
+#define TCP_ADDF_PENDING_SHUT_RDWR 32 /* Call shutdown(sock, SHUT_RDWR) when queue empties */
+#define TCP_ADDF_PENDING_SHUTDOWN \
+ (TCP_ADDF_PENDING_SHUT_WR | TCP_ADDF_PENDING_SHUT_RDWR)
/* *_REQ_* replies */
#define INET_REP_ERROR 0
@@ -1407,6 +1422,8 @@ static int tcp_sendv(tcp_descriptor* desc, ErlIOVec* ev);
static int tcp_recv(tcp_descriptor* desc, int request_len);
static int tcp_deliver(tcp_descriptor* desc, int len);
+static int tcp_shutdown_error(tcp_descriptor* desc, int err);
+
static int tcp_inet_output(tcp_descriptor* desc, HANDLE event);
static int tcp_inet_input(tcp_descriptor* desc, HANDLE event);
@@ -9473,10 +9490,18 @@ static ErlDrvSSizeT tcp_inet_ctl(ErlDrvData e, unsigned int cmd,
return ctl_error(EINVAL, rbuf, rsize);
}
how = buf[0];
- if (sock_shutdown(INETP(desc)->s, how) == 0) {
+ if (how != TCP_SHUT_RD && driver_sizeq(desc->inet.port) > 0) {
+ if (how == TCP_SHUT_WR) {
+ desc->tcp_add_flags |= TCP_ADDF_PENDING_SHUT_WR;
+ } else if (how == TCP_SHUT_RDWR) {
+ desc->tcp_add_flags |= TCP_ADDF_PENDING_SHUT_RDWR;
+ }
return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize);
- } else {
+ }
+ if (IS_SOCKET_ERROR(sock_shutdown(INETP(desc)->s, how))) {
return ctl_error(sock_errno(), rbuf, rsize);
+ } else {
+ return ctl_reply(INET_REP_OK, NULL, 0, rbuf, rsize);
}
}
default:
@@ -9613,6 +9638,8 @@ static void tcp_inet_commandv(ErlDrvData e, ErlIOVec* ev)
else
inet_reply_error(INETP(desc), ENOTCONN);
}
+ else if (desc->tcp_add_flags & TCP_ADDF_PENDING_SHUTDOWN)
+ tcp_shutdown_error(desc, EPIPE);
else if (tcp_sendv(desc, ev) == 0)
inet_reply_ok(INETP(desc));
DEBUGF(("tcp_inet_commandv(%ld) }\r\n", (long)desc->inet.port));
@@ -10506,7 +10533,7 @@ static int tcp_inet_input(tcp_descriptor* desc, HANDLE event)
return ret;
}
-static int tcp_send_error(tcp_descriptor* desc, int err)
+static int tcp_send_or_shutdown_error(tcp_descriptor* desc, int err)
{
/*
* If the port is busy, we must do some clean-up before proceeding.
@@ -10563,6 +10590,16 @@ static int tcp_send_error(tcp_descriptor* desc, int err)
return -1;
}
+static int tcp_send_error(tcp_descriptor* desc, int err)
+{
+ return tcp_send_or_shutdown_error(desc, err);
+}
+
+static int tcp_shutdown_error(tcp_descriptor* desc, int err)
+{
+ return tcp_send_or_shutdown_error(desc, err);
+}
+
/*
** Send non-blocking vector data
*/
@@ -10763,6 +10800,19 @@ static int tcp_send(tcp_descriptor* desc, char* ptr, ErlDrvSizeT len)
return 0;
}
+/* shutdown on the socket:
+** Assume caller has confirmed TCP_ADDF_PENDING_SHUTDOWN is set.
+*/
+static void tcp_shutdown_async(tcp_descriptor* desc)
+{
+ int how;
+
+ how = (desc->tcp_add_flags & TCP_ADDF_PENDING_SHUT_WR) ?
+ TCP_SHUT_WR : TCP_SHUT_RDWR;
+ if (IS_SOCKET_ERROR(sock_shutdown(INETP(desc)->s, how)))
+ tcp_shutdown_error(desc, sock_errno());
+}
+
#ifdef __OSE__
static void tcp_inet_drv_output_ose(ErlDrvData data, ErlDrvEvent event)
@@ -10891,6 +10941,8 @@ static int tcp_inet_output(tcp_descriptor* desc, HANDLE event)
if ((iov = driver_peekq(ix, &vsize)) == NULL) {
sock_select(INETP(desc), FD_WRITE, 0);
send_empty_out_q_msgs(INETP(desc));
+ if (desc->tcp_add_flags & TCP_ADDF_PENDING_SHUTDOWN)
+ tcp_shutdown_async(desc);
goto done;
}
vsize = vsize > MAX_VSIZE ? MAX_VSIZE : vsize;