X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=acceptor.cpp;h=7c28ca58038c27b107cad1b8dd82d6dd3b78bd3c;hp=3172c73b80a1821e0973e08c267f6f8ccae74c10;hb=ef4cf9957b668845eb1064f583a0021009cbeeac;hpb=5cd46e39b4063d94f6dc559ae350beeb8406a8f9

diff --git a/acceptor.cpp b/acceptor.cpp
index 3172c73..7c28ca5 100644
--- a/acceptor.cpp
+++ b/acceptor.cpp
@@ -1,6 +1,7 @@
 #include <assert.h>
 #include <errno.h>
 #include <netinet/in.h>
+#include <netinet/tcp.h>
 #include <poll.h>
 #include <stdlib.h>
 #include <string.h>
@@ -12,13 +13,13 @@
 #include "log.h"
 #include "serverpool.h"
 #include "state.pb.h"
+#include "util.h"
 
 using namespace std;
 
 extern ServerPool *servers;
-extern volatile bool hupped;
 
-int create_server_socket(int port, SocketType socket_type)
+int create_server_socket(const sockaddr_in6 &addr, SocketType socket_type)
 {
 	int server_sock;
 	if (socket_type == TCP_SOCKET) {
@@ -51,12 +52,7 @@ int create_server_socket(int port, SocketType socket_type)
 		exit(1);
 	}
 
-	sockaddr_in6 addr;
-	memset(&addr, 0, sizeof(addr));
-	addr.sin6_family = AF_INET6;
-	addr.sin6_port = htons(port);
-
-	if (bind(server_sock, reinterpret_cast<sockaddr *>(&addr), sizeof(addr)) == -1) {
+	if (bind(server_sock, reinterpret_cast<const sockaddr *>(&addr), sizeof(addr)) == -1) {
 		log_perror("bind");
 		exit(1);
 	}
@@ -70,63 +66,72 @@ int create_server_socket(int port, SocketType socket_type)
 
 	return server_sock;
 }
+
+sockaddr_in6 create_any_address(int port)
+{
+	sockaddr_in6 sin6;
+	memset(&sin6, 0, sizeof(sin6));
+	sin6.sin6_family = AF_INET6;
+	sin6.sin6_port = htons(port);
+	return sin6;
+}
+
+sockaddr_in6 extract_address_from_acceptor_proto(const AcceptorProto &proto)
+{
+	sockaddr_in6 sin6;
+	memset(&sin6, 0, sizeof(sin6));
+	sin6.sin6_family = AF_INET6;
+
+	if (!proto.addr().empty()) {
+		int ret = inet_pton(AF_INET6, proto.addr().c_str(), &sin6.sin6_addr);
+		assert(ret == 1);
+	}
+
+	sin6.sin6_port = htons(proto.port());
+	return sin6;
+}
 	
-Acceptor::Acceptor(int server_sock, int port)
+Acceptor::Acceptor(int server_sock, const sockaddr_in6 &addr)
 	: server_sock(server_sock),
-	  port(port)
+	  addr(addr)
 {
 }
 
 Acceptor::Acceptor(const AcceptorProto &serialized)
 	: server_sock(serialized.server_sock()),
-	  port(serialized.port())
+	  addr(extract_address_from_acceptor_proto(serialized))
 {
 }
 
 AcceptorProto Acceptor::serialize() const
 {
+	char buf[INET6_ADDRSTRLEN];
+	inet_ntop(addr.sin6_family, &addr.sin6_addr, buf, sizeof(buf));
+
 	AcceptorProto serialized;
 	serialized.set_server_sock(server_sock);
-	serialized.set_port(port);
+	serialized.set_addr(buf);
+	serialized.set_port(ntohs(addr.sin6_port));
 	return serialized;
 }
 
 void Acceptor::close_socket()
 {
-	int ret;
-	do {
-		ret = close(server_sock);
-	} while (ret == -1 && errno == EINTR);
-
-	if (ret == -1) {
-		log_perror("close");
-	}
+	safe_close(server_sock);
 }
 
 void Acceptor::do_work()
 {
-	while (!hupped) {
-		// Since we are non-blocking, we need to wait for the right state first.
-		// Wait up to 50 ms, then check hupped.
-		pollfd pfd;
-		pfd.fd = server_sock;
-		pfd.events = POLLIN;
-
-		int nfds = poll(&pfd, 1, 50);
-		if (nfds == 0 || (nfds == -1 && errno == EINTR)) {
-			continue;
-		}
-		if (nfds == -1) {
-			log_perror("poll");
-			usleep(100000);
+	while (!should_stop()) {
+		if (!wait_for_activity(server_sock, POLLIN, NULL)) {
 			continue;
 		}
 
 		sockaddr_in6 addr;
 		socklen_t addrlen = sizeof(addr);
 
-		// Get a new socket.
-		int sock = accept(server_sock, reinterpret_cast<sockaddr *>(&addr), &addrlen);
+		// Get a new socket, and set it as nonblocking.
+		int sock = accept4(server_sock, reinterpret_cast<sockaddr *>(&addr), &addrlen, SOCK_NONBLOCK);
 		if (sock == -1 && errno == EINTR) {
 			continue;
 		}
@@ -136,11 +141,13 @@ void Acceptor::do_work()
 			continue;
 		}
 
-		// Set the socket as nonblocking.
+		// Enable TCP_CORK for maximum throughput. In the rare case that the
+		// stream stops entirely, this will cause a small delay (~200 ms)
+		// before the last part is sent out, but that should be fine.
 		int one = 1;
-		if (ioctl(sock, FIONBIO, &one) == -1) {
-			log_perror("FIONBIO");
-			exit(1);
+		if (setsockopt(sock, SOL_TCP, TCP_CORK, &one, sizeof(one)) == -1) {
+			log_perror("setsockopt(TCP_CORK)");
+			// Can still continue.
 		}
 
 		// Pick a server, round-robin, and hand over the socket to it.