You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
157 lines
6.4 KiB
157 lines
6.4 KiB
9 months ago
|
commit c08948c8b831a2ba73c676b48aa11ba1b58cc542
|
||
|
|
Author: Tomas Korbar <tkorbar@redhat.com>
|
||
|
|
Date: Thu Dec 8 11:03:08 2022 +0100
|
||
|
|
|
||
|
|
Backport adding IP_BIND_ADDRESS_NO_PORT flag to outgoing connections
|
||
|
|
|
||
|
|
diff --git a/src/comm.cc b/src/comm.cc
|
||
|
|
index 0d5f34d..6811b54 100644
|
||
|
|
--- a/src/comm.cc
|
||
|
|
+++ b/src/comm.cc
|
||
|
|
@@ -58,6 +58,7 @@
|
||
|
|
*/
|
||
|
|
|
||
|
|
static IOCB commHalfClosedReader;
|
||
|
|
+static int comm_openex(int sock_type, int proto, Ip::Address &, int flags, const char *note);
|
||
|
|
static void comm_init_opened(const Comm::ConnectionPointer &conn, const char *note, struct addrinfo *AI);
|
||
|
|
static int comm_apply_flags(int new_socket, Ip::Address &addr, int flags, struct addrinfo *AI);
|
||
|
|
|
||
|
|
@@ -75,6 +76,7 @@ static EVH commHalfClosedCheck;
|
||
|
|
static void commPlanHalfClosedCheck();
|
||
|
|
|
||
|
|
static Comm::Flag commBind(int s, struct addrinfo &);
|
||
|
|
+static void commSetBindAddressNoPort(int);
|
||
|
|
static void commSetReuseAddr(int);
|
||
|
|
static void commSetNoLinger(int);
|
||
|
|
#ifdef TCP_NODELAY
|
||
|
|
@@ -201,6 +203,22 @@ comm_local_port(int fd)
|
||
|
|
return F->local_addr.port();
|
||
|
|
}
|
||
|
|
|
||
|
|
+/// sets the IP_BIND_ADDRESS_NO_PORT socket option to optimize ephemeral port
|
||
|
|
+/// reuse by outgoing TCP connections that must bind(2) to a source IP address
|
||
|
|
+static void
|
||
|
|
+commSetBindAddressNoPort(const int fd)
|
||
|
|
+{
|
||
|
|
+#if defined(IP_BIND_ADDRESS_NO_PORT)
|
||
|
|
+ int flag = 1;
|
||
|
|
+ if (setsockopt(fd, IPPROTO_IP, IP_BIND_ADDRESS_NO_PORT, reinterpret_cast<char*>(&flag), sizeof(flag)) < 0) {
|
||
|
|
+ const auto savedErrno = errno;
|
||
|
|
+ debugs(50, DBG_IMPORTANT, "ERROR: setsockopt(IP_BIND_ADDRESS_NO_PORT) failure: " << xstrerr(savedErrno));
|
||
|
|
+ }
|
||
|
|
+#else
|
||
|
|
+ (void)fd;
|
||
|
|
+#endif
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
static Comm::Flag
|
||
|
|
commBind(int s, struct addrinfo &inaddr)
|
||
|
|
{
|
||
|
|
@@ -227,6 +245,10 @@ comm_open(int sock_type,
|
||
|
|
int flags,
|
||
|
|
const char *note)
|
||
|
|
{
|
||
|
|
+ // assume zero-port callers do not need to know the assigned port right away
|
||
|
|
+ if (sock_type == SOCK_STREAM && addr.port() == 0 && ((flags & COMM_DOBIND) || !addr.isAnyAddr()))
|
||
|
|
+ flags |= COMM_DOBIND_PORT_LATER;
|
||
|
|
+
|
||
|
|
return comm_openex(sock_type, proto, addr, flags, note);
|
||
|
|
}
|
||
|
|
|
||
|
|
@@ -328,7 +350,7 @@ comm_set_transparent(int fd)
|
||
|
|
* Create a socket. Default is blocking, stream (TCP) socket. IO_TYPE
|
||
|
|
* is OR of flags specified in defines.h:COMM_*
|
||
|
|
*/
|
||
|
|
-int
|
||
|
|
+static int
|
||
|
|
comm_openex(int sock_type,
|
||
|
|
int proto,
|
||
|
|
Ip::Address &addr,
|
||
|
|
@@ -476,6 +498,9 @@ comm_apply_flags(int new_socket,
|
||
|
|
if ( addr.isNoAddr() )
|
||
|
|
debugs(5,0,"CRITICAL: Squid is attempting to bind() port " << addr << "!!");
|
||
|
|
|
||
|
|
+ if ((flags & COMM_DOBIND_PORT_LATER))
|
||
|
|
+ commSetBindAddressNoPort(new_socket);
|
||
|
|
+
|
||
|
|
if (commBind(new_socket, *AI) != Comm::OK) {
|
||
|
|
comm_close(new_socket);
|
||
|
|
return -1;
|
||
|
|
diff --git a/src/comm.h b/src/comm.h
|
||
|
|
index c963e1c..9ff201d 100644
|
||
|
|
--- a/src/comm.h
|
||
|
|
+++ b/src/comm.h
|
||
|
|
@@ -43,7 +43,6 @@ void comm_import_opened(const Comm::ConnectionPointer &, const char *note, struc
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Open a port specially bound for listening or sending through a specific port.
|
||
|
|
- * This is a wrapper providing IPv4/IPv6 failover around comm_openex().
|
||
|
|
* Please use for all listening sockets and bind() outbound sockets.
|
||
|
|
*
|
||
|
|
* It will open a socket bound for:
|
||
|
|
@@ -59,7 +58,6 @@ void comm_import_opened(const Comm::ConnectionPointer &, const char *note, struc
|
||
|
|
int comm_open_listener(int sock_type, int proto, Ip::Address &addr, int flags, const char *note);
|
||
|
|
void comm_open_listener(int sock_type, int proto, Comm::ConnectionPointer &conn, const char *note);
|
||
|
|
|
||
|
|
-int comm_openex(int, int, Ip::Address &, int, const char *);
|
||
|
|
unsigned short comm_local_port(int fd);
|
||
|
|
|
||
|
|
int comm_udp_sendto(int sock, const Ip::Address &to, const void *buf, int buflen);
|
||
|
|
diff --git a/src/comm/ConnOpener.cc b/src/comm/ConnOpener.cc
|
||
|
|
index 25a30e4..2082214 100644
|
||
|
|
--- a/src/comm/ConnOpener.cc
|
||
|
|
+++ b/src/comm/ConnOpener.cc
|
||
|
|
@@ -263,7 +263,7 @@ Comm::ConnOpener::createFd()
|
||
|
|
if (callback_ == NULL || callback_->canceled())
|
||
|
|
return false;
|
||
|
|
|
||
|
|
- temporaryFd_ = comm_openex(SOCK_STREAM, IPPROTO_TCP, conn_->local, conn_->flags, host_);
|
||
|
|
+ temporaryFd_ = comm_open(SOCK_STREAM, IPPROTO_TCP, conn_->local, conn_->flags, host_);
|
||
|
|
if (temporaryFd_ < 0) {
|
||
|
|
sendAnswer(Comm::ERR_CONNECT, 0, "Comm::ConnOpener::createFd");
|
||
|
|
return false;
|
||
|
|
diff --git a/src/comm/Connection.h b/src/comm/Connection.h
|
||
|
|
index 4f2f23a..1e32c22 100644
|
||
|
|
--- a/src/comm/Connection.h
|
||
|
|
+++ b/src/comm/Connection.h
|
||
|
|
@@ -47,6 +47,8 @@ namespace Comm
|
||
|
|
#define COMM_DOBIND 0x08 // requires a bind()
|
||
|
|
#define COMM_TRANSPARENT 0x10 // arrived via TPROXY
|
||
|
|
#define COMM_INTERCEPTION 0x20 // arrived via NAT
|
||
|
|
+/// Internal Comm optimization: Keep the source port unassigned until connect(2)
|
||
|
|
+#define COMM_DOBIND_PORT_LATER 0x100
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Store data about the physical and logical attributes of a connection.
|
||
|
|
diff --git a/src/ipc.cc b/src/ipc.cc
|
||
|
|
index e1d48fc..e92a27f 100644
|
||
|
|
--- a/src/ipc.cc
|
||
|
|
+++ b/src/ipc.cc
|
||
|
|
@@ -95,12 +95,12 @@ ipcCreate(int type, const char *prog, const char *const args[], const char *name
|
||
|
|
} else void(0)
|
||
|
|
|
||
|
|
if (type == IPC_TCP_SOCKET) {
|
||
|
|
- crfd = cwfd = comm_open(SOCK_STREAM,
|
||
|
|
+ crfd = cwfd = comm_open_listener(SOCK_STREAM,
|
||
|
|
0,
|
||
|
|
local_addr,
|
||
|
|
COMM_NOCLOEXEC,
|
||
|
|
name);
|
||
|
|
- prfd = pwfd = comm_open(SOCK_STREAM,
|
||
|
|
+ prfd = pwfd = comm_open_listener(SOCK_STREAM,
|
||
|
|
0, /* protocol */
|
||
|
|
local_addr,
|
||
|
|
0, /* blocking */
|
||
|
|
diff --git a/src/tests/stub_comm.cc b/src/tests/stub_comm.cc
|
||
|
|
index 58f85e4..5381ab2 100644
|
||
|
|
--- a/src/tests/stub_comm.cc
|
||
|
|
+++ b/src/tests/stub_comm.cc
|
||
|
|
@@ -46,7 +46,6 @@ int comm_open_uds(int sock_type, int proto, struct sockaddr_un* addr, int flags)
|
||
|
|
void comm_import_opened(const Comm::ConnectionPointer &, const char *note, struct addrinfo *AI) STUB
|
||
|
|
int comm_open_listener(int sock_type, int proto, Ip::Address &addr, int flags, const char *note) STUB_RETVAL(-1)
|
||
|
|
void comm_open_listener(int sock_type, int proto, Comm::ConnectionPointer &conn, const char *note) STUB
|
||
|
|
-int comm_openex(int, int, Ip::Address &, int, tos_t tos, nfmark_t nfmark, const char *) STUB_RETVAL(-1)
|
||
|
|
unsigned short comm_local_port(int fd) STUB_RETVAL(0)
|
||
|
|
int comm_udp_sendto(int sock, const Ip::Address &to, const void *buf, int buflen) STUB_RETVAL(-1)
|
||
|
|
void commCallCloseHandlers(int fd) STUB
|