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102 lines
2.8 KiB
102 lines
2.8 KiB
/*
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* netutils.h - Network utilities
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*
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* Copyright (C) 2013 - 2016, Max Lv <max.c.lv@gmail.com>
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*
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* This file is part of the shadowsocks-libev.
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*
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* shadowsocks-libev is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* shadowsocks-libev is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with shadowsocks-libev; see the file COPYING. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef _NETUTILS_H
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#define _NETUTILS_H
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#if defined(__linux__)
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#include <netdb.h>
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#elif !defined(__MINGW32__)
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#include <netinet/tcp.h>
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#endif
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// only enable TCP_FASTOPEN on linux
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#if defined(__linux__)
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#include <linux/tcp.h>
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/* conditional define for TCP_FASTOPEN */
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#ifndef TCP_FASTOPEN
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#define TCP_FASTOPEN 23
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#endif
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/* conditional define for MSG_FASTOPEN */
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#ifndef MSG_FASTOPEN
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#define MSG_FASTOPEN 0x20000000
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#endif
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#elif !defined(__APPLE__)
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#ifdef TCP_FASTOPEN
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#undef TCP_FASTOPEN
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#endif
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#endif
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/* Backward compatibility for MPTCP_ENABLED between kernel 3 & 4 */
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#ifndef MPTCP_ENABLED
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#ifdef TCP_CC_INFO
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#define MPTCP_ENABLED 42
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#else
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#define MPTCP_ENABLED 26
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#endif
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#endif
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#ifndef UPDATE_INTERVAL
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#define UPDATE_INTERVAL 10
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#endif
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/** byte size of ip4 address */
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#define INET_SIZE 4
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/** byte size of ip6 address */
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#define INET6_SIZE 16
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size_t get_sockaddr_len(struct sockaddr *addr);
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ssize_t get_sockaddr(char *host, char *port,
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struct sockaddr_storage *storage, int block,
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int ipv6first);
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int set_reuseport(int socket);
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#ifdef SET_INTERFACE
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int setinterface(int socket_fd, const char *interface_name);
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#endif
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int bind_to_address(int socket_fd, const char *address);
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/**
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* Compare two sockaddrs. Imposes an ordering on the addresses.
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* Compares address and port.
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* @param addr1: address 1.
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* @param addr2: address 2.
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* @param len: lengths of addr.
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* @return: 0 if addr1 == addr2. -1 if addr1 is smaller, +1 if larger.
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*/
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int sockaddr_cmp(struct sockaddr_storage *addr1,
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struct sockaddr_storage *addr2, socklen_t len);
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/**
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* Compare two sockaddrs. Compares address, not the port.
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* @param addr1: address 1.
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* @param addr2: address 2.
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* @param len: lengths of addr.
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* @return: 0 if addr1 == addr2. -1 if addr1 is smaller, +1 if larger.
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*/
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int sockaddr_cmp_addr(struct sockaddr_storage *addr1,
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struct sockaddr_storage *addr2, socklen_t len);
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int validate_hostname(const char *hostname, const int hostname_len);
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#endif
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