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Avoid deadlock when writing/reading data on a connecting TCP socket

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TCP status polling is always performed as non blocking.
Trying to put a packet on a connecting socket will fail immediately.

(cherry picked from commit fa0cb7da0e)
This commit is contained in:
Fabio Alessandrelli
2017-01-18 19:04:37 +01:00
parent 86de0bd081
commit 9f41c0a356
4 changed files with 10 additions and 20 deletions
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13
drivers/unix/stream_peer_tcp_posix.cpp
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@@ -88,15 +88,10 @@ Error StreamPeerTCPPosix::_block(int p_sockfd, bool p_read, bool p_write) const
return ret < 0 ? FAILED : OK;
};
Error StreamPeerTCPPosix::_poll_connection(bool p_block) const {
Error StreamPeerTCPPosix::_poll_connection() const {
ERR_FAIL_COND_V(status != STATUS_CONNECTING || sockfd == -1, FAILED);
if (p_block) {
_block(sockfd, false, true);
};
struct sockaddr_storage their_addr;
size_t addr_size = _set_sockaddr(&their_addr, peer_host, peer_port, sock_type);
@@ -191,7 +186,7 @@ Error StreamPeerTCPPosix::write(const uint8_t *p_data, int p_bytes, int &r_sent,
if (status != STATUS_CONNECTED) {
if (_poll_connection(p_block) != OK) {
if (_poll_connection() != OK) {
return FAILED;
};
@@ -251,7 +246,7 @@ Error StreamPeerTCPPosix::read(uint8_t *p_buffer, int p_bytes, int &r_received,
if (status == STATUS_CONNECTING) {
if (_poll_connection(p_block) != OK) {
if (_poll_connection() != OK) {
return FAILED;
};
@@ -330,7 +325,7 @@ bool StreamPeerTCPPosix::is_connected() const {
StreamPeerTCP::Status StreamPeerTCPPosix::get_status() const {
if (status == STATUS_CONNECTING) {
_poll_connection(false);
_poll_connection();
};
return status;