2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 2010, Digium, Inc.
6 * Viagénie <asteriskv6@viagenie.ca>
8 * See http://www.asterisk.org for more information about
9 * the Asterisk project. Please do not directly contact
10 * any of the maintainers of this project for assistance;
11 * the project provides a web site, mailing lists and IRC
12 * channels for your use.
14 * This program is free software, distributed under the terms of
15 * the GNU General Public License Version 2. See the LICENSE file
16 * at the top of the source tree.
20 * \brief Network socket handling
23 #ifndef _ASTERISK_NETSOCK2_H
24 #define _ASTERISK_NETSOCK2_H
26 #if defined(__cplusplus) || defined(c_plusplus)
30 #include <sys/socket.h>
32 #include <netinet/in.h>
35 * Values for address families that we support. This is reproduced from socket.h
36 * because we do not want users to include that file. Only netsock2.c should
37 * ever include socket.h.
40 AST_AF_UNSPEC = AF_UNSPEC,
41 AST_AF_INET = AF_INET,
42 AST_AF_INET6 = AF_INET6,
46 AST_TRANSPORT_UDP = 1,
47 AST_TRANSPORT_TCP = 1 << 1,
48 AST_TRANSPORT_TLS = 1 << 2,
49 AST_TRANSPORT_WS = 1 << 3,
50 AST_TRANSPORT_WSS = 1 << 4,
55 * Isolate a 32-bit section of an IPv6 address
57 * An IPv6 address can be divided into 4 32-bit chunks. This gives
58 * easy access to one of these chunks.
60 * \param sin6 A pointer to a struct sockaddr_in6
61 * \param index Which 32-bit chunk to operate on. Must be in the range 0-3.
63 #define V6_WORD(sin6, index) ((uint32_t *)&((sin6)->sin6_addr))[(index)]
66 * \brief Socket address structure.
69 * The first member is big enough to contain addresses of any
70 * family. The second member contains the length (in bytes) used
71 * in the first member.
74 * Some BSDs have the length embedded in sockaddr structs. We
75 * ignore them. (This is the right thing to do.)
78 * It is important to always initialize ast_sockaddr before use
79 * -- even if they are passed to ast_sockaddr_copy() as the
80 * underlying storage could be bigger than what ends up being
81 * copied -- leaving part of the data unitialized.
84 struct sockaddr_storage ss;
90 * Convert an IPv4-mapped IPv6 address into an IPv4 address.
92 * \warning You should rarely need this function. Only call this
93 * if you know what you're doing.
95 * \param addr The IPv4-mapped address to convert
96 * \param ast_mapped The resulting IPv4 address
97 * \retval 0 Unable to make the conversion
98 * \retval 1 Successful conversion
100 int ast_sockaddr_ipv4_mapped(const struct ast_sockaddr *addr, struct ast_sockaddr *ast_mapped);
106 * Checks if the ast_sockaddr is null. "null" in this sense essentially
107 * means uninitialized, or having a 0 length.
109 * \param addr Pointer to the ast_sockaddr we wish to check
110 * \retval 1 \a addr is null
111 * \retval 0 \a addr is non-null.
113 static inline int ast_sockaddr_isnull(const struct ast_sockaddr *addr)
115 return !addr || addr->len == 0;
122 * Sets address \a addr to null.
126 static inline void ast_sockaddr_setnull(struct ast_sockaddr *addr)
135 * Copies the data from one ast_sockaddr to another
137 * \param dst The destination ast_sockaddr
138 * \param src The source ast_sockaddr
141 static inline void ast_sockaddr_copy(struct ast_sockaddr *dst,
142 const struct ast_sockaddr *src)
144 memcpy(dst, src, src->len);
152 * Compares two ast_sockaddr structures
154 * \retval -1 \a a is lexicographically smaller than \a b
155 * \retval 0 \a a is equal to \a b
156 * \retval 1 \a b is lexicographically smaller than \a a
158 int ast_sockaddr_cmp(const struct ast_sockaddr *a, const struct ast_sockaddr *b);
164 * Compares the addresses of two ast_sockaddr structures.
166 * \retval -1 \a a is lexicographically smaller than \a b
167 * \retval 0 \a a is equal to \a b
168 * \retval 1 \a b is lexicographically smaller than \a a
170 int ast_sockaddr_cmp_addr(const struct ast_sockaddr *a, const struct ast_sockaddr *b);
172 #define AST_SOCKADDR_STR_ADDR (1 << 0)
173 #define AST_SOCKADDR_STR_PORT (1 << 1)
174 #define AST_SOCKADDR_STR_BRACKETS (1 << 2)
175 #define AST_SOCKADDR_STR_REMOTE (1 << 3)
176 #define AST_SOCKADDR_STR_HOST (AST_SOCKADDR_STR_ADDR | AST_SOCKADDR_STR_BRACKETS)
177 #define AST_SOCKADDR_STR_DEFAULT (AST_SOCKADDR_STR_ADDR | AST_SOCKADDR_STR_PORT)
178 #define AST_SOCKADDR_STR_ADDR_REMOTE (AST_SOCKADDR_STR_ADDR | AST_SOCKADDR_STR_REMOTE)
179 #define AST_SOCKADDR_STR_HOST_REMOTE (AST_SOCKADDR_STR_HOST | AST_SOCKADDR_STR_REMOTE)
180 #define AST_SOCKADDR_STR_DEFAULT_REMOTE (AST_SOCKADDR_STR_DEFAULT | AST_SOCKADDR_STR_REMOTE)
181 #define AST_SOCKADDR_STR_FORMAT_MASK (AST_SOCKADDR_STR_ADDR | AST_SOCKADDR_STR_PORT | AST_SOCKADDR_STR_BRACKETS)
187 * Convert a socket address to a string.
190 * This will be of the form a.b.c.d:xyz
191 * for IPv4 and [a:b:c:...:d]:xyz for IPv6.
193 * This function is thread-safe. The returned string is on static
194 * thread-specific storage.
196 * \param addr The input to be stringified
197 * \param format one of the following:
198 * AST_SOCKADDR_STR_DEFAULT:
199 * a.b.c.d:xyz for IPv4
200 * [a:b:c:...:d]:xyz for IPv6.
201 * AST_SOCKADDR_STR_ADDR: address only
203 * a:b:c:...:d for IPv6.
204 * AST_SOCKADDR_STR_HOST: address only, suitable for a URL
206 * [a:b:c:...:d] for IPv6.
207 * AST_SOCKADDR_STR_PORT: port only
209 * \note The string pointer returned by this function will point to a string that
210 * will be changed whenever any form of ast_sockaddr_stringify_fmt is called on that
211 * thread. Because of this, it is important that if you use this function, you use the
212 * string before another use of this function is made elsewhere in the same thread.
213 * The easiest way to accomplish this is by immediately copying the string to a buffer
214 * with something like ast_strdupa.
216 * \retval "(null)" \a addr is null
217 * \retval "" An error occurred during processing
218 * \retval string The stringified form of the address
220 char *ast_sockaddr_stringify_fmt(const struct ast_sockaddr *addr, int format);
226 * Wrapper around ast_sockaddr_stringify_fmt() with default format
228 * \return same as ast_sockaddr_stringify_fmt()
230 static inline char *ast_sockaddr_stringify(const struct ast_sockaddr *addr)
232 return ast_sockaddr_stringify_fmt(addr, AST_SOCKADDR_STR_DEFAULT);
239 * Wrapper around ast_sockaddr_stringify_fmt() with default format
241 * \note This address will be suitable for passing to a remote machine via the
242 * application layer. For example, the scope-id on a link-local IPv6 address
245 * \return same as ast_sockaddr_stringify_fmt()
247 static inline char *ast_sockaddr_stringify_remote(const struct ast_sockaddr *addr)
249 return ast_sockaddr_stringify_fmt(addr, AST_SOCKADDR_STR_DEFAULT_REMOTE);
256 * Wrapper around ast_sockaddr_stringify_fmt() to return an address only
258 * \return same as ast_sockaddr_stringify_fmt()
260 static inline char *ast_sockaddr_stringify_addr(const struct ast_sockaddr *addr)
262 return ast_sockaddr_stringify_fmt(addr, AST_SOCKADDR_STR_ADDR);
269 * Wrapper around ast_sockaddr_stringify_fmt() to return an address only
271 * \note This address will be suitable for passing to a remote machine via the
272 * application layer. For example, the scope-id on a link-local IPv6 address
275 * \return same as ast_sockaddr_stringify_fmt()
277 static inline char *ast_sockaddr_stringify_addr_remote(const struct ast_sockaddr *addr)
279 return ast_sockaddr_stringify_fmt(addr, AST_SOCKADDR_STR_ADDR_REMOTE);
286 * Wrapper around ast_sockaddr_stringify_fmt() to return an address only,
287 * suitable for a URL (with brackets for IPv6).
289 * \return same as ast_sockaddr_stringify_fmt()
291 static inline char *ast_sockaddr_stringify_host(const struct ast_sockaddr *addr)
293 return ast_sockaddr_stringify_fmt(addr, AST_SOCKADDR_STR_HOST);
300 * Wrapper around ast_sockaddr_stringify_fmt() to return an address only,
301 * suitable for a URL (with brackets for IPv6).
303 * \note This address will be suitable for passing to a remote machine via the
304 * application layer. For example, the scope-id on a link-local IPv6 address
307 * \return same as ast_sockaddr_stringify_fmt()
309 static inline char *ast_sockaddr_stringify_host_remote(const struct ast_sockaddr *addr)
311 return ast_sockaddr_stringify_fmt(addr, AST_SOCKADDR_STR_HOST_REMOTE);
318 * Wrapper around ast_sockaddr_stringify_fmt() to return a port only
320 * \return same as ast_sockaddr_stringify_fmt()
322 static inline char *ast_sockaddr_stringify_port(const struct ast_sockaddr *addr)
324 return ast_sockaddr_stringify_fmt(addr, AST_SOCKADDR_STR_PORT);
331 * Splits a string into its host and port components
333 * \param[in] str The string to parse. May be modified by writing a NUL at the end of
335 * \param[out] host Pointer to the host component within \a str.
336 * \param[out] port Pointer to the port component within \a str.
337 * \param flags If set to zero, a port MAY be present. If set to PARSE_PORT_IGNORE, a
338 * port MAY be present but will be ignored. If set to PARSE_PORT_REQUIRE,
339 * a port MUST be present. If set to PARSE_PORT_FORBID, a port MUST NOT
345 int ast_sockaddr_split_hostport(char *str, char **host, char **port, int flags);
351 * Parse an IPv4 or IPv6 address string.
354 * Parses a string containing an IPv4 or IPv6 address followed by an optional
355 * port (separated by a colon) into a struct ast_sockaddr. The allowed formats
364 * Host names are NOT allowed.
366 * \param[out] addr The resulting ast_sockaddr. This MAY be NULL from
367 * functions that are performing validity checks only, e.g. ast_parse_arg().
368 * \param str The string to parse
369 * \param flags If set to zero, a port MAY be present. If set to
370 * PARSE_PORT_IGNORE, a port MAY be present but will be ignored. If set to
371 * PARSE_PORT_REQUIRE, a port MUST be present. If set to PARSE_PORT_FORBID, a
372 * port MUST NOT be present.
377 int ast_sockaddr_parse(struct ast_sockaddr *addr, const char *str, int flags);
383 * Parses a string with an IPv4 or IPv6 address and place results into an array
386 * Parses a string containing a host name or an IPv4 or IPv6 address followed
387 * by an optional port (separated by a colon). The result is returned into a
388 * array of struct ast_sockaddr. Allowed formats for str are the following:
391 * host.example.com:port
398 * \param[out] addrs The resulting array of ast_sockaddrs
399 * \param str The string to parse
400 * \param flags If set to zero, a port MAY be present. If set to
401 * PARSE_PORT_IGNORE, a port MAY be present but will be ignored. If set to
402 * PARSE_PORT_REQUIRE, a port MUST be present. If set to PARSE_PORT_FORBID, a
403 * port MUST NOT be present.
405 * \param family Only addresses of the given family will be returned. Use 0 or
406 * AST_AF_UNSPEC to get addresses of all families.
409 * \retval non-zero The number of elements in addrs array.
411 int ast_sockaddr_resolve(struct ast_sockaddr **addrs, const char *str,
412 int flags, int family);
416 * Apply a netmask to an address and store the result in a separate structure.
418 * When dealing with IPv6 addresses, one cannot apply a netmask with a simple
419 * logical AND operation. Futhermore, the incoming address may be an IPv4
420 * address and needs to be mapped properly before attempting to apply a rule.
422 * \param addr The IP address to apply the mask to.
423 * \param netmask The netmask configured in the host access rule.
424 * \param result The resultant address after applying the netmask to the given address
425 * \retval 0 Successfully applied netmask
426 * \retval -1 Failed to apply netmask
428 int ast_sockaddr_apply_netmask(const struct ast_sockaddr *addr, const struct ast_sockaddr *netmask,
429 struct ast_sockaddr *result);
435 * Get the port number of a socket address.
437 * \warning Do not use this function unless you really know what you are doing.
438 * And "I want the port number" is not knowing what you are doing.
440 * \retval 0 Address is null
441 * \retval non-zero The port number of the ast_sockaddr
443 #define ast_sockaddr_port(addr) _ast_sockaddr_port(addr, __FILE__, __LINE__, __PRETTY_FUNCTION__)
444 uint16_t _ast_sockaddr_port(const struct ast_sockaddr *addr, const char *file, int line, const char *func);
450 * Sets the port number of a socket address.
452 * \warning Do not use this function unless you really know what you are doing.
453 * And "I want the port number" is not knowing what you are doing.
455 * \param addr Address on which to set the port
456 * \param port The port you wish to set the address to use
459 #define ast_sockaddr_set_port(addr,port) _ast_sockaddr_set_port(addr,port,__FILE__,__LINE__,__PRETTY_FUNCTION__)
460 void _ast_sockaddr_set_port(struct ast_sockaddr *addr, uint16_t port, const char *file, int line, const char *func);
466 * Get an IPv4 address of an ast_sockaddr
468 * \warning You should rarely need this function. Only use if you know what
470 * \return IPv4 address in network byte order
472 uint32_t ast_sockaddr_ipv4(const struct ast_sockaddr *addr);
478 * Determine if the address is an IPv4 address
480 * \warning You should rarely need this function. Only use if you know what
482 * \retval 1 This is an IPv4 address
483 * \retval 0 This is an IPv6 or IPv4-mapped IPv6 address
485 int ast_sockaddr_is_ipv4(const struct ast_sockaddr *addr);
491 * Determine if this is an IPv4-mapped IPv6 address
493 * \warning You should rarely need this function. Only use if you know what
496 * \retval 1 This is an IPv4-mapped IPv6 address.
497 * \retval 0 This is not an IPv4-mapped IPv6 address.
499 int ast_sockaddr_is_ipv4_mapped(const struct ast_sockaddr *addr);
505 * Determine if an IPv4 address is a multicast address
507 * \param addr the address to check
509 * This function checks if an address is in the 224.0.0.0/4 network block.
511 * \return non-zero if this is a multicast address
513 int ast_sockaddr_is_ipv4_multicast(const struct ast_sockaddr *addr);
519 * Determine if this is a link-local IPv6 address
521 * \warning You should rarely need this function. Only use if you know what
524 * \retval 1 This is a link-local IPv6 address.
525 * \retval 0 This is link-local IPv6 address.
527 int ast_sockaddr_is_ipv6_link_local(const struct ast_sockaddr *addr);
533 * Determine if this is an IPv6 address
535 * \warning You should rarely need this function. Only use if you know what
538 * \retval 1 This is an IPv6 or IPv4-mapped IPv6 address.
539 * \retval 0 This is an IPv4 address.
541 int ast_sockaddr_is_ipv6(const struct ast_sockaddr *addr);
547 * Determine if the address type is unspecified, or "any" address.
550 * For IPv4, this would be the address 0.0.0.0, and for IPv6,
551 * this would be the address ::. The port number is ignored.
553 * \retval 1 This is an "any" address
554 * \retval 0 This is not an "any" address
556 int ast_sockaddr_is_any(const struct ast_sockaddr *addr);
562 * Computes a hash value from the address. The port is ignored.
564 * \retval 0 Unknown address family
565 * \retval other A 32-bit hash derived from the address
567 int ast_sockaddr_hash(const struct ast_sockaddr *addr);
573 * Returns a string representation of an ast_transport
575 * \retval Name of the tranpsort if it is defined
576 * \retval Undefined if the transport is undefined
578 const char *ast_transport2str(enum ast_transport transport);
584 * Wrapper around accept(2) that uses struct ast_sockaddr.
587 * For parameter and return information, see the man page for
590 int ast_accept(int sockfd, struct ast_sockaddr *addr);
596 * Wrapper around bind(2) that uses struct ast_sockaddr.
599 * For parameter and return information, see the man page for
602 int ast_bind(int sockfd, const struct ast_sockaddr *addr);
608 * Wrapper around connect(2) that uses struct ast_sockaddr.
611 * For parameter and return information, see the man page for
614 int ast_connect(int sockfd, const struct ast_sockaddr *addr);
620 * Wrapper around getsockname(2) that uses struct ast_sockaddr.
623 * For parameter and return information, see the man page for
626 int ast_getsockname(int sockfd, struct ast_sockaddr *addr);
632 * Wrapper around recvfrom(2) that uses struct ast_sockaddr.
635 * For parameter and return information, see the man page for
638 ssize_t ast_recvfrom(int sockfd, void *buf, size_t len, int flags,
639 struct ast_sockaddr *src_addr);
645 * Wrapper around sendto(2) that uses ast_sockaddr.
649 * return information, see the man page for sendto(2)
651 ssize_t ast_sendto(int sockfd, const void *buf, size_t len, int flags,
652 const struct ast_sockaddr *dest_addr);
658 * Set type of service
661 * Set ToS ("Type of Service for IPv4 and "Traffic Class for IPv6) and
662 * CoS (Linux's SO_PRIORITY)
664 * \param sockfd File descriptor for socket on which to set the parameters
665 * \param tos The type of service for the socket
666 * \param cos The cost of service for the socket
667 * \param desc A text description of the socket in question.
669 * \retval -1 Error, with errno set to an appropriate value
671 int ast_set_qos(int sockfd, int tos, int cos, const char *desc);
674 * These are backward compatibility functions that may be used by subsystems
675 * that have not yet been converted to IPv6. They will be removed when all
676 * subsystems are IPv6-ready.
684 * Converts a struct ast_sockaddr to a struct sockaddr_in.
686 * \param addr The ast_sockaddr to convert
687 * \param[out] sin The resulting sockaddr_in struct
688 * \retval nonzero Success
689 * \retval zero Failure
691 #define ast_sockaddr_to_sin(addr,sin) _ast_sockaddr_to_sin(addr,sin, __FILE__, __LINE__, __PRETTY_FUNCTION__)
692 int _ast_sockaddr_to_sin(const struct ast_sockaddr *addr,
693 struct sockaddr_in *sin, const char *file, int line, const char *func);
698 * \brief Converts a struct sockaddr_in to a struct ast_sockaddr.
701 * \param sin The sockaddr_in to convert
702 * \return an ast_sockaddr structure
704 #define ast_sockaddr_from_sin(addr,sin) _ast_sockaddr_from_sin(addr,sin, __FILE__, __LINE__, __PRETTY_FUNCTION__)
705 void _ast_sockaddr_from_sin(struct ast_sockaddr *addr, const struct sockaddr_in *sin,
706 const char *file, int line, const char *func);
710 #if defined(__cplusplus) || defined(c_plusplus)
714 #endif /* _ASTERISK_NETSOCK2_H */