From eeccc5fca0f5b399c22db27b6799312027cb38ba Mon Sep 17 00:00:00 2001 From: Tomas Korbar Date: Tue, 6 Dec 2022 11:18:27 +0100 Subject: [PATCH] Resolves: #2151188 - [RFE] Add the "IP_BIND_ADDRESS_NO_PORT" flag to sockets created for outgoing connections in the squid source code. --- squid-5.5-ip-bind-address-no-port.patch | 156 ++++++++++++++++++++++++ squid.spec | 9 +- 2 files changed, 164 insertions(+), 1 deletion(-) create mode 100644 squid-5.5-ip-bind-address-no-port.patch diff --git a/squid-5.5-ip-bind-address-no-port.patch b/squid-5.5-ip-bind-address-no-port.patch new file mode 100644 index 0000000..55d9597 --- /dev/null +++ b/squid-5.5-ip-bind-address-no-port.patch @@ -0,0 +1,156 @@ +commit c54122584d175cf1d292b239a5b70f2d1aa77c3a +Author: Tomas Korbar +Date: Mon Dec 5 15:03:07 2022 +0100 + + Backport adding IP_BIND_ADDRESS_NO_PORT flag to outgoing connections + +diff --git a/src/comm.cc b/src/comm.cc +index b4818f3..b18d175 100644 +--- a/src/comm.cc ++++ b/src/comm.cc +@@ -59,6 +59,7 @@ + */ + + 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); + +@@ -76,6 +77,7 @@ 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 +@@ -202,6 +204,22 @@ 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(&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) + { +@@ -228,6 +246,10 @@ 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); + } + +@@ -329,7 +351,7 @@ 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, +@@ -488,6 +510,9 @@ comm_apply_flags(int new_socket, + } + } + #endif ++ 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 5a1a7c2..a9f33db 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 19c1237..79fa2ed 100644 +--- a/src/comm/ConnOpener.cc ++++ b/src/comm/ConnOpener.cc +@@ -285,7 +285,7 @@ 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 40c2249..2641f4e 100644 +--- a/src/comm/Connection.h ++++ b/src/comm/Connection.h +@@ -52,6 +52,8 @@ namespace Comm + #define COMM_REUSEPORT 0x40 //< needs SO_REUSEPORT + /// not registered with Comm and not owned by any connection-closing code + #define COMM_ORPHANED 0x40 ++/// 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 45cab52..42e11e6 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 a1d33d6..bf4bea6 100644 +--- a/src/tests/stub_comm.cc ++++ b/src/tests/stub_comm.cc +@@ -48,7 +48,6 @@ 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 diff --git a/squid.spec b/squid.spec index d6a54c2..d85bec4 100644 --- a/squid.spec +++ b/squid.spec @@ -2,7 +2,7 @@ Name: squid Version: 5.5 -Release: 4%{?dist} +Release: 5%{?dist} Summary: The Squid proxy caching server Epoch: 7 # See CREDITS for breakdown of non GPLv2+ code @@ -25,6 +25,8 @@ Source98: perl-requires-squid.sh # Upstream patches # Backported patches +Patch101: squid-5.5-ip-bind-address-no-port.patch +# https://bugzilla.redhat.com/show_bug.cgi?id=2151188 # Local patches # Applying upstream patches first makes it less likely that local patches @@ -110,6 +112,7 @@ lookup program (dnsserver), a program for retrieving FTP data # Upstream patches # Backported patches +%patch101 -p1 -b .ip-bind-address-no-port # Local patches %patch201 -p1 -b .config @@ -349,6 +352,10 @@ fi %changelog +* Tue Dec 06 2022 Tomas Korbar - 7:5.5-5 +- Resolves: #2151188 - [RFE] Add the "IP_BIND_ADDRESS_NO_PORT" + flag to sockets created for outgoing connections in the squid source code. + * Mon Nov 07 2022 Luboš Uhliarik - 7:5.5-4 - Resolves: #2095468 - [RFE] squid use systemd-sysusers