2 * Copyright (C) 2006-2013 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
6 /** \file net.h exported symbols from net.c */
9 * The buffer size of the sun_path component of struct sockaddr_un.
11 * While glibc doesn't define \p UNIX_PATH_MAX, it documents it has being
12 * limited to 108 bytes. On NetBSD it is only 104 bytes though. We trust \p
13 * UNIX_PATH_MAX if it is defined and use the size of the ->sun_path member
14 * otherwise. This should be safe everywhere.
17 #define UNIX_PATH_MAX (sizeof(((struct sockaddr_un *)0)->sun_path))
20 /* Userland defines for Linux DCCP support. */
23 #define IPPROTO_DCCP 33 /**< IANA assigned value. */
27 #define SOCK_DCCP 6 /**< Linux socket type. */
30 #ifndef DCCP_SOCKOPT_RX_CCID
31 /** Per-connection CCID support (set/get the RX CCID, since v2.6.30-rc1). */
32 #define DCCP_SOCKOPT_RX_CCID 15
36 #define SOL_DCCP 269 /**< Linux socket level. */
39 #ifndef DCCP_SOCKOPT_GET_CUR_MPS
40 #define DCCP_SOCKOPT_GET_CUR_MPS 5 /**< Max packet size, RFC 4340, 14. */
43 #ifndef DCCP_SOCKOPT_AVAILABLE_CCIDS
44 #define DCCP_SOCKOPT_AVAILABLE_CCIDS 12 /**< List of supported CCIDs. */
47 #ifndef DCCP_SOCKOPT_CCID
48 #define DCCP_SOCKOPT_CCID 13 /**< Sets both TX/RX CCID. */
51 #ifndef DCCP_SOCKOPT_TX_CCID
52 #define DCCP_SOCKOPT_TX_CCID 14 /**< Set/get the TX CCID. */
56 * Flowopts: Transport-layer independent encapsulation of socket options
57 * that need to be registered prior to setting up a connection.
61 extern struct flowopts *flowopt_new(void);
62 extern void flowopt_add(struct flowopts *fo, int level, int opt,
63 const char *name, const void *val, int len);
64 /** Flowopt shortcut macros */
65 #define OPT_ADD(fo, lev, opt, val, len) flowopt_add(fo, lev, opt, #opt, val, len)
68 * Functions to parse and validate (parts of) URLs.
70 extern char *parse_cidr(const char *cidr,
71 char *addr, ssize_t addrlen, int32_t *netmask);
72 extern char *parse_url(const char *url,
73 char *host, ssize_t hostlen, int32_t *port);
74 extern const char *stringify_port(int port, const char *transport);
76 * Ensure that string conforms to the IPv4 address format.
78 * \param address The address string to check.
80 * \return 1 if \a address conforms to the IPv4 address format, else 0.
82 _static_inline_ bool is_valid_ipv4_address(const char *address)
84 struct in_addr test_it;
86 return inet_pton(AF_INET, address, &test_it) != 0;
90 * Ensure that string conforms to IPv6 address format.
92 * \param address The address string to check.
94 * \return 1 if string has a valid IPv6 address syntax, 0 if not.
97 _static_inline_ bool is_valid_ipv6_address(const char *address)
99 struct in6_addr test_it;
101 return inet_pton(AF_INET6, address, &test_it) != 0;
105 * Generic socket creation (passive and active sockets).
107 extern int makesock(unsigned l4type, bool passive,
108 const char *host, uint16_t port_number,
109 struct flowopts *fo);
111 static inline int para_connect_simple(unsigned l4type,
112 const char *host, uint16_t port)
114 return makesock(l4type, 0, host, port, NULL);
117 void extract_v4_addr(const struct sockaddr_storage *ss, struct in_addr *ia);
120 * Functions to support listening sockets.
122 /** How many pending connections queue of a listening server will hold. */
124 extern int para_listen(unsigned l4type, uint16_t port, struct flowopts *fo);
126 static inline int para_listen_simple(unsigned l4type, uint16_t port)
128 return para_listen(l4type, port, NULL);
131 /** Pretty-printing of IPv4/6 socket addresses */
132 extern char *local_name(int sockfd);
133 extern char *remote_name(int sockfd);
136 * Determining maximum payload (packet) size
138 extern int generic_max_transport_msg_size(int sockfd);
140 int recv_bin_buffer(int fd, char *buf, size_t size);
141 int recv_buffer(int fd, char *buf, size_t size);
143 int para_accept(int fd, fd_set *rfds, void *addr, socklen_t size, int *new_fd);
144 int create_local_socket(const char *name, struct sockaddr_un *unix_addr,
146 int connect_local_socket(const char *name);
147 int recv_cred_buffer(int, char *, size_t);
148 ssize_t send_cred_buffer(int, char*);
151 * Functions and definitions to support \p IPPROTO_DCCP
153 /** Estimated worst-case length of a DCCP header including options. */
154 #define DCCP_MAX_HEADER 128
155 /** Hardcoded maximum number of separate CCID modules compiled into a host. */
156 #define DCCP_MAX_HOST_CCIDS 20
157 extern int dccp_available_ccids(uint8_t **ccid_array);