3 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
4 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 * @brief Socket Abstraction.
34 * @defgroup PJ_SOCK Socket Abstraction
38 * The PJLIB socket abstraction layer is a thin and very portable abstraction
39 * for socket API. It provides API similar to BSD socket API. The abstraction
40 * is needed because BSD socket API is not always available on all platforms,
41 * therefore it wouldn't be possible to create a trully portable network
42 * programs unless we provide such abstraction.
44 * Applications can use this API directly in their application, just
45 * as they would when using traditional BSD socket API, provided they
46 * call #pj_init() first.
48 * \section pj_sock_examples_sec Examples
50 * For some examples on how to use the socket API, please see:
52 * - \ref page_pjlib_sock_test
53 * - \ref page_pjlib_select_test
54 * - \ref page_pjlib_sock_perf_test
59 * Supported address families.
60 * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL AF_*, BECAUSE
61 * THE LIBRARY WILL DO TRANSLATION TO THE NATIVE VALUE.
64 /** Address family is unspecified. @see pj_AF_UNSPEC() */
65 extern const pj_uint16_t PJ_AF_UNSPEC;
67 /** Unix domain socket. @see pj_AF_UNIX() */
68 extern const pj_uint16_t PJ_AF_UNIX;
70 /** POSIX name for AF_UNIX */
71 #define PJ_AF_LOCAL PJ_AF_UNIX;
73 /** Internet IP protocol. @see pj_AF_INET() */
74 extern const pj_uint16_t PJ_AF_INET;
76 /** IP version 6. @see pj_AF_INET6() */
77 extern const pj_uint16_t PJ_AF_INET6;
79 /** Packet family. @see pj_AF_PACKET() */
80 extern const pj_uint16_t PJ_AF_PACKET;
82 /** IRDA sockets. @see pj_AF_IRDA() */
83 extern const pj_uint16_t PJ_AF_IRDA;
86 * Accessor functions for various address family constants. These
87 * functions are provided because Symbian doesn't allow exporting
88 * global variables from a DLL.
92 /** Get #PJ_AF_UNSPEC value */
93 PJ_DECL(pj_uint16_t) pj_AF_UNSPEC(void);
94 /** Get #PJ_AF_UNIX value. */
95 PJ_DECL(pj_uint16_t) pj_AF_UNIX(void);
96 /** Get #PJ_AF_INET value. */
97 PJ_DECL(pj_uint16_t) pj_AF_INET(void);
98 /** Get #PJ_AF_INET6 value. */
99 PJ_DECL(pj_uint16_t) pj_AF_INET6(void);
100 /** Get #PJ_AF_PACKET value. */
101 PJ_DECL(pj_uint16_t) pj_AF_PACKET(void);
102 /** Get #PJ_AF_IRDA value. */
103 PJ_DECL(pj_uint16_t) pj_AF_IRDA(void);
105 /* When pjlib is not built as DLL, these accessor functions are
106 * simply a macro to get their constants
108 /** Get #PJ_AF_UNSPEC value */
109 # define pj_AF_UNSPEC() PJ_AF_UNSPEC
110 /** Get #PJ_AF_UNIX value. */
111 # define pj_AF_UNIX() PJ_AF_UNIX
112 /** Get #PJ_AF_INET value. */
113 # define pj_AF_INET() PJ_AF_INET
114 /** Get #PJ_AF_INET6 value. */
115 # define pj_AF_INET6() PJ_AF_INET6
116 /** Get #PJ_AF_PACKET value. */
117 # define pj_AF_PACKET() PJ_AF_PACKET
118 /** Get #PJ_AF_IRDA value. */
119 # define pj_AF_IRDA() PJ_AF_IRDA
124 * Supported types of sockets.
125 * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL SOCK_*, BECAUSE
126 * THE LIBRARY WILL TRANSLATE THE VALUE TO THE NATIVE VALUE.
129 /** Sequenced, reliable, connection-based byte streams.
130 * @see pj_SOCK_STREAM() */
131 extern const pj_uint16_t PJ_SOCK_STREAM;
133 /** Connectionless, unreliable datagrams of fixed maximum lengths.
134 * @see pj_SOCK_DGRAM() */
135 extern const pj_uint16_t PJ_SOCK_DGRAM;
137 /** Raw protocol interface. @see pj_SOCK_RAW() */
138 extern const pj_uint16_t PJ_SOCK_RAW;
140 /** Reliably-delivered messages. @see pj_SOCK_RDM() */
141 extern const pj_uint16_t PJ_SOCK_RDM;
145 * Accessor functions for various constants. These functions are provided
146 * because Symbian doesn't allow exporting global variables from a DLL.
150 /** Get #PJ_SOCK_STREAM constant */
151 PJ_DECL(int) pj_SOCK_STREAM(void);
152 /** Get #PJ_SOCK_DGRAM constant */
153 PJ_DECL(int) pj_SOCK_DGRAM(void);
154 /** Get #PJ_SOCK_RAW constant */
155 PJ_DECL(int) pj_SOCK_RAW(void);
156 /** Get #PJ_SOCK_RDM constant */
157 PJ_DECL(int) pj_SOCK_RDM(void);
159 /** Get #PJ_SOCK_STREAM constant */
160 # define pj_SOCK_STREAM() PJ_SOCK_STREAM
161 /** Get #PJ_SOCK_DGRAM constant */
162 # define pj_SOCK_DGRAM() PJ_SOCK_DGRAM
163 /** Get #PJ_SOCK_RAW constant */
164 # define pj_SOCK_RAW() PJ_SOCK_RAW
165 /** Get #PJ_SOCK_RDM constant */
166 # define pj_SOCK_RDM() PJ_SOCK_RDM
171 * Socket level specified in #pj_sock_setsockopt() or #pj_sock_getsockopt().
172 * APPLICATION MUST USE THESE VALUES INSTEAD OF NORMAL SOL_*, BECAUSE
173 * THE LIBRARY WILL TRANSLATE THE VALUE TO THE NATIVE VALUE.
175 /** Socket level. @see pj_SOL_SOCKET() */
176 extern const pj_uint16_t PJ_SOL_SOCKET;
177 /** IP level. @see pj_SOL_IP() */
178 extern const pj_uint16_t PJ_SOL_IP;
179 /** TCP level. @see pj_SOL_TCP() */
180 extern const pj_uint16_t PJ_SOL_TCP;
181 /** UDP level. @see pj_SOL_UDP() */
182 extern const pj_uint16_t PJ_SOL_UDP;
183 /** IP version 6. @see pj_SOL_IPV6() */
184 extern const pj_uint16_t PJ_SOL_IPV6;
187 * Accessor functions for various constants. These functions are provided
188 * because Symbian doesn't allow exporting global variables from a DLL.
192 /** Get #PJ_SOL_SOCKET constant */
193 PJ_DECL(pj_uint16_t) pj_SOL_SOCKET(void);
194 /** Get #PJ_SOL_IP constant */
195 PJ_DECL(pj_uint16_t) pj_SOL_IP(void);
196 /** Get #PJ_SOL_TCP constant */
197 PJ_DECL(pj_uint16_t) pj_SOL_TCP(void);
198 /** Get #PJ_SOL_UDP constant */
199 PJ_DECL(pj_uint16_t) pj_SOL_UDP(void);
200 /** Get #PJ_SOL_IPV6 constant */
201 PJ_DECL(pj_uint16_t) pj_SOL_IPV6(void);
203 /** Get #PJ_SOL_SOCKET constant */
204 # define pj_SOL_SOCKET() PJ_SOL_SOCKET
205 /** Get #PJ_SOL_IP constant */
206 # define pj_SOL_IP() PJ_SOL_IP
207 /** Get #PJ_SOL_TCP constant */
208 # define pj_SOL_TCP() PJ_SOL_TCP
209 /** Get #PJ_SOL_UDP constant */
210 # define pj_SOL_UDP() PJ_SOL_UDP
211 /** Get #PJ_SOL_IPV6 constant */
212 # define pj_SOL_IPV6() PJ_SOL_IPV6
219 * TOS CURRENTLY DOES NOT WORK IN Windows 2000 and above!
220 * See http://support.microsoft.com/kb/248611
222 /** IP_TOS optname in setsockopt(). @see pj_IP_TOS() */
223 extern const pj_uint16_t PJ_IP_TOS;
226 * IP TOS related constats.
229 * TOS CURRENTLY DOES NOT WORK IN Windows 2000 and above!
230 * See http://support.microsoft.com/kb/248611
232 /** Minimize delays. @see pj_IPTOS_LOWDELAY() */
233 extern const pj_uint16_t PJ_IPTOS_LOWDELAY;
235 /** Optimize throughput. @see pj_IPTOS_THROUGHPUT() */
236 extern const pj_uint16_t PJ_IPTOS_THROUGHPUT;
238 /** Optimize for reliability. @see pj_IPTOS_RELIABILITY() */
239 extern const pj_uint16_t PJ_IPTOS_RELIABILITY;
241 /** "filler data" where slow transmission does't matter.
242 * @see pj_IPTOS_MINCOST() */
243 extern const pj_uint16_t PJ_IPTOS_MINCOST;
247 /** Get #PJ_IP_TOS constant */
248 PJ_DECL(int) pj_IP_TOS(void);
250 /** Get #PJ_IPTOS_LOWDELAY constant */
251 PJ_DECL(int) pj_IPTOS_LOWDELAY(void);
253 /** Get #PJ_IPTOS_THROUGHPUT constant */
254 PJ_DECL(int) pj_IPTOS_THROUGHPUT(void);
256 /** Get #PJ_IPTOS_RELIABILITY constant */
257 PJ_DECL(int) pj_IPTOS_RELIABILITY(void);
259 /** Get #PJ_IPTOS_MINCOST constant */
260 PJ_DECL(int) pj_IPTOS_MINCOST(void);
262 /** Get #PJ_IP_TOS constant */
263 # define pj_IP_TOS() PJ_IP_TOS
265 /** Get #PJ_IPTOS_LOWDELAY constant */
266 # define pj_IPTOS_LOWDELAY() PJ_IP_TOS_LOWDELAY
268 /** Get #PJ_IPTOS_THROUGHPUT constant */
269 # define pj_IPTOS_THROUGHPUT() PJ_IP_TOS_THROUGHPUT
271 /** Get #PJ_IPTOS_RELIABILITY constant */
272 # define pj_IPTOS_RELIABILITY() PJ_IP_TOS_RELIABILITY
274 /** Get #PJ_IPTOS_MINCOST constant */
275 # define pj_IPTOS_MINCOST() PJ_IP_TOS_MINCOST
280 * Values to be specified as \c optname when calling #pj_sock_setsockopt()
281 * or #pj_sock_getsockopt().
284 /** Socket type. @see pj_SO_TYPE() */
285 extern const pj_uint16_t PJ_SO_TYPE;
287 /** Buffer size for receive. @see pj_SO_RCVBUF() */
288 extern const pj_uint16_t PJ_SO_RCVBUF;
290 /** Buffer size for send. @see pj_SO_SNDBUF() */
291 extern const pj_uint16_t PJ_SO_SNDBUF;
293 /** Disables the Nagle algorithm for send coalescing. @see pj_TCP_NODELAY */
294 extern const pj_uint16_t PJ_TCP_NODELAY;
296 /** Allows the socket to be bound to an address that is already in use.
297 * @see pj_SO_REUSEADDR */
298 extern const pj_uint16_t PJ_SO_REUSEADDR;
300 /** Do not generate SIGPIPE. @see pj_SO_NOSIGPIPE */
301 extern const pj_uint16_t PJ_SO_NOSIGPIPE;
303 /** Set the protocol-defined priority for all packets to be sent on socket.
305 extern const pj_uint16_t PJ_SO_PRIORITY;
307 /** IP multicast interface. @see pj_IP_MULTICAST_IF() */
308 extern const pj_uint16_t PJ_IP_MULTICAST_IF;
310 /** IP multicast ttl. @see pj_IP_MULTICAST_TTL() */
311 extern const pj_uint16_t PJ_IP_MULTICAST_TTL;
313 /** IP multicast loopback. @see pj_IP_MULTICAST_LOOP() */
314 extern const pj_uint16_t PJ_IP_MULTICAST_LOOP;
316 /** Add an IP group membership. @see pj_IP_ADD_MEMBERSHIP() */
317 extern const pj_uint16_t PJ_IP_ADD_MEMBERSHIP;
319 /** Drop an IP group membership. @see pj_IP_DROP_MEMBERSHIP() */
320 extern const pj_uint16_t PJ_IP_DROP_MEMBERSHIP;
324 /** Get #PJ_SO_TYPE constant */
325 PJ_DECL(pj_uint16_t) pj_SO_TYPE(void);
327 /** Get #PJ_SO_RCVBUF constant */
328 PJ_DECL(pj_uint16_t) pj_SO_RCVBUF(void);
330 /** Get #PJ_SO_SNDBUF constant */
331 PJ_DECL(pj_uint16_t) pj_SO_SNDBUF(void);
333 /** Get #PJ_TCP_NODELAY constant */
334 PJ_DECL(pj_uint16_t) pj_TCP_NODELAY(void);
336 /** Get #PJ_SO_REUSEADDR constant */
337 PJ_DECL(pj_uint16_t) pj_SO_REUSEADDR(void);
339 /** Get #PJ_SO_NOSIGPIPE constant */
340 PJ_DECL(pj_uint16_t) pj_SO_NOSIGPIPE(void);
342 /** Get #PJ_SO_PRIORITY constant */
343 PJ_DECL(pj_uint16_t) pj_SO_PRIORITY(void);
345 /** Get #PJ_IP_MULTICAST_IF constant */
346 PJ_DECL(pj_uint16_t) pj_IP_MULTICAST_IF(void);
348 /** Get #PJ_IP_MULTICAST_TTL constant */
349 PJ_DECL(pj_uint16_t) pj_IP_MULTICAST_TTL(void);
351 /** Get #PJ_IP_MULTICAST_LOOP constant */
352 PJ_DECL(pj_uint16_t) pj_IP_MULTICAST_LOOP(void);
354 /** Get #PJ_IP_ADD_MEMBERSHIP constant */
355 PJ_DECL(pj_uint16_t) pj_IP_ADD_MEMBERSHIP(void);
357 /** Get #PJ_IP_DROP_MEMBERSHIP constant */
358 PJ_DECL(pj_uint16_t) pj_IP_DROP_MEMBERSHIP(void);
360 /** Get #PJ_SO_TYPE constant */
361 # define pj_SO_TYPE() PJ_SO_TYPE
363 /** Get #PJ_SO_RCVBUF constant */
364 # define pj_SO_RCVBUF() PJ_SO_RCVBUF
366 /** Get #PJ_SO_SNDBUF constant */
367 # define pj_SO_SNDBUF() PJ_SO_SNDBUF
369 /** Get #PJ_TCP_NODELAY constant */
370 # define pj_TCP_NODELAY() PJ_TCP_NODELAY
372 /** Get #PJ_SO_REUSEADDR constant */
373 # define pj_SO_REUSEADDR() PJ_SO_REUSEADDR
375 /** Get #PJ_SO_NOSIGPIPE constant */
376 # define pj_SO_NOSIGPIPE() PJ_SO_NOSIGPIPE
378 /** Get #PJ_SO_PRIORITY constant */
379 # define pj_SO_PRIORITY() PJ_SO_PRIORITY
381 /** Get #PJ_IP_MULTICAST_IF constant */
382 # define pj_IP_MULTICAST_IF() PJ_IP_MULTICAST_IF
384 /** Get #PJ_IP_MULTICAST_TTL constant */
385 # define pj_IP_MULTICAST_TTL() PJ_IP_MULTICAST_TTL
387 /** Get #PJ_IP_MULTICAST_LOOP constant */
388 # define pj_IP_MULTICAST_LOOP() PJ_IP_MULTICAST_LOOP
390 /** Get #PJ_IP_ADD_MEMBERSHIP constant */
391 # define pj_IP_ADD_MEMBERSHIP() PJ_IP_ADD_MEMBERSHIP
393 /** Get #PJ_IP_DROP_MEMBERSHIP constant */
394 # define pj_IP_DROP_MEMBERSHIP() PJ_IP_DROP_MEMBERSHIP
399 * Flags to be specified in #pj_sock_recv, #pj_sock_send, etc.
402 /** Out-of-band messages. @see pj_MSG_OOB() */
403 extern const int PJ_MSG_OOB;
405 /** Peek, don't remove from buffer. @see pj_MSG_PEEK() */
406 extern const int PJ_MSG_PEEK;
408 /** Don't route. @see pj_MSG_DONTROUTE() */
409 extern const int PJ_MSG_DONTROUTE;
413 /** Get #PJ_MSG_OOB constant */
414 PJ_DECL(int) pj_MSG_OOB(void);
416 /** Get #PJ_MSG_PEEK constant */
417 PJ_DECL(int) pj_MSG_PEEK(void);
419 /** Get #PJ_MSG_DONTROUTE constant */
420 PJ_DECL(int) pj_MSG_DONTROUTE(void);
422 /** Get #PJ_MSG_OOB constant */
423 # define pj_MSG_OOB() PJ_MSG_OOB
425 /** Get #PJ_MSG_PEEK constant */
426 # define pj_MSG_PEEK() PJ_MSG_PEEK
428 /** Get #PJ_MSG_DONTROUTE constant */
429 # define pj_MSG_DONTROUTE() PJ_MSG_DONTROUTE
434 * Flag to be specified in #pj_sock_shutdown().
436 typedef enum pj_socket_sd_type
438 PJ_SD_RECEIVE = 0, /**< No more receive. */
439 PJ_SHUT_RD = 0, /**< Alias for SD_RECEIVE. */
440 PJ_SD_SEND = 1, /**< No more sending. */
441 PJ_SHUT_WR = 1, /**< Alias for SD_SEND. */
442 PJ_SD_BOTH = 2, /**< No more send and receive. */
443 PJ_SHUT_RDWR = 2 /**< Alias for SD_BOTH. */
448 /** Address to accept any incoming messages. */
449 #define PJ_INADDR_ANY ((pj_uint32_t)0)
451 /** Address indicating an error return */
452 #define PJ_INADDR_NONE ((pj_uint32_t)0xffffffff)
454 /** Address to send to all hosts. */
455 #define PJ_INADDR_BROADCAST ((pj_uint32_t)0xffffffff)
459 * Maximum length specifiable by #pj_sock_listen().
460 * If the build system doesn't override this value, then the lowest
461 * denominator (five, in Win32 systems) will be used.
463 #if !defined(PJ_SOMAXCONN)
464 # define PJ_SOMAXCONN 5
469 * Constant for invalid socket returned by #pj_sock_socket() and
472 #define PJ_INVALID_SOCKET (-1)
474 /* Must undefine s_addr because of pj_in_addr below */
478 * This structure describes Internet address.
480 typedef struct pj_in_addr
482 pj_uint32_t s_addr; /**< The 32bit IP address. */
487 * Maximum length of text representation of an IPv4 address.
489 #define PJ_INET_ADDRSTRLEN 16
492 * Maximum length of text representation of an IPv6 address.
494 #define PJ_INET6_ADDRSTRLEN 46
497 * The size of sin_zero field in pj_sockaddr_in structure. Most OSes
498 * use 8, but others such as the BSD TCP/IP stack in eCos uses 24.
500 #ifndef PJ_SOCKADDR_IN_SIN_ZERO_LEN
501 # define PJ_SOCKADDR_IN_SIN_ZERO_LEN 8
505 * This structure describes Internet socket address.
506 * If PJ_SOCKADDR_HAS_LEN is not zero, then sin_zero_len member is added
507 * to this struct. As far the application is concerned, the value of
508 * this member will always be zero. Internally, PJLIB may modify the value
509 * before calling OS socket API, and reset the value back to zero before
510 * returning the struct to application.
512 struct pj_sockaddr_in
514 #if defined(PJ_SOCKADDR_HAS_LEN) && PJ_SOCKADDR_HAS_LEN!=0
515 pj_uint8_t sin_zero_len; /**< Just ignore this. */
516 pj_uint8_t sin_family; /**< Address family. */
518 pj_uint16_t sin_family; /**< Address family. */
520 pj_uint16_t sin_port; /**< Transport layer port number. */
521 pj_in_addr sin_addr; /**< IP address. */
522 char sin_zero[PJ_SOCKADDR_IN_SIN_ZERO_LEN]; /**< Padding.*/
529 * This structure describes IPv6 address.
531 typedef union pj_in6_addr
533 /* This is the main entry */
534 pj_uint8_t s6_addr[16]; /**< 8-bit array */
536 /* While these are used for proper alignment */
537 pj_uint32_t u6_addr32[4];
539 /* Do not use this with Winsock2, as this will align pj_sockaddr_in6
540 * to 64-bit boundary and Winsock2 doesn't like it!
542 * This is now disabled, see http://trac.pjsip.org/repos/ticket/1058
544 #if 0 && defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 && \
545 (!defined(PJ_WIN32) || PJ_WIN32==0)
546 pj_int64_t u6_addr64[2];
552 /** Initializer value for pj_in6_addr. */
553 #define PJ_IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
555 /** Initializer value for pj_in6_addr. */
556 #define PJ_IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
559 * This structure describes IPv6 socket address.
560 * If PJ_SOCKADDR_HAS_LEN is not zero, then sin_zero_len member is added
561 * to this struct. As far the application is concerned, the value of
562 * this member will always be zero. Internally, PJLIB may modify the value
563 * before calling OS socket API, and reset the value back to zero before
564 * returning the struct to application.
566 typedef struct pj_sockaddr_in6
568 #if defined(PJ_SOCKADDR_HAS_LEN) && PJ_SOCKADDR_HAS_LEN!=0
569 pj_uint8_t sin6_zero_len; /**< Just ignore this. */
570 pj_uint8_t sin6_family; /**< Address family. */
572 pj_uint16_t sin6_family; /**< Address family */
574 pj_uint16_t sin6_port; /**< Transport layer port number. */
575 pj_uint32_t sin6_flowinfo; /**< IPv6 flow information */
576 pj_in6_addr sin6_addr; /**< IPv6 address. */
577 pj_uint32_t sin6_scope_id; /**< Set of interfaces for a scope */
582 * This structure describes common attributes found in transport addresses.
583 * If PJ_SOCKADDR_HAS_LEN is not zero, then sa_zero_len member is added
584 * to this struct. As far the application is concerned, the value of
585 * this member will always be zero. Internally, PJLIB may modify the value
586 * before calling OS socket API, and reset the value back to zero before
587 * returning the struct to application.
589 typedef struct pj_addr_hdr
591 #if defined(PJ_SOCKADDR_HAS_LEN) && PJ_SOCKADDR_HAS_LEN!=0
592 pj_uint8_t sa_zero_len;
593 pj_uint8_t sa_family;
595 pj_uint16_t sa_family; /**< Common data: address family. */
601 * This union describes a generic socket address.
603 typedef union pj_sockaddr
605 pj_addr_hdr addr; /**< Generic transport address. */
606 pj_sockaddr_in ipv4; /**< IPv4 transport address. */
607 pj_sockaddr_in6 ipv6; /**< IPv6 transport address. */
612 * This structure provides multicast group information for IPv4 addresses.
614 typedef struct pj_ip_mreq {
615 pj_in_addr imr_multiaddr; /**< IP multicast address of group. */
616 pj_in_addr imr_interface; /**< local IP address of interface. */
620 /*****************************************************************************
622 * SOCKET ADDRESS MANIPULATION.
624 *****************************************************************************
628 * Convert 16-bit value from network byte order to host byte order.
630 * @param netshort 16-bit network value.
631 * @return 16-bit host value.
633 PJ_DECL(pj_uint16_t) pj_ntohs(pj_uint16_t netshort);
636 * Convert 16-bit value from host byte order to network byte order.
638 * @param hostshort 16-bit host value.
639 * @return 16-bit network value.
641 PJ_DECL(pj_uint16_t) pj_htons(pj_uint16_t hostshort);
644 * Convert 32-bit value from network byte order to host byte order.
646 * @param netlong 32-bit network value.
647 * @return 32-bit host value.
649 PJ_DECL(pj_uint32_t) pj_ntohl(pj_uint32_t netlong);
652 * Convert 32-bit value from host byte order to network byte order.
654 * @param hostlong 32-bit host value.
655 * @return 32-bit network value.
657 PJ_DECL(pj_uint32_t) pj_htonl(pj_uint32_t hostlong);
660 * Convert an Internet host address given in network byte order
661 * to string in standard numbers and dots notation.
663 * @param inaddr The host address.
664 * @return The string address.
666 PJ_DECL(char*) pj_inet_ntoa(pj_in_addr inaddr);
669 * This function converts the Internet host address cp from the standard
670 * numbers-and-dots notation into binary data and stores it in the structure
671 * that inp points to.
673 * @param cp IP address in standard numbers-and-dots notation.
674 * @param inp Structure that holds the output of the conversion.
676 * @return nonzero if the address is valid, zero if not.
678 PJ_DECL(int) pj_inet_aton(const pj_str_t *cp, struct pj_in_addr *inp);
681 * This function converts an address in its standard text presentation form
682 * into its numeric binary form. It supports both IPv4 and IPv6 address
685 * @param af Specify the family of the address. The PJ_AF_INET and
686 * PJ_AF_INET6 address families shall be supported.
687 * @param src Points to the string being passed in.
688 * @param dst Points to a buffer into which the function stores the
689 * numeric address; this shall be large enough to hold the
690 * numeric address (32 bits for PJ_AF_INET, 128 bits for
693 * @return PJ_SUCCESS if conversion was successful.
695 PJ_DECL(pj_status_t) pj_inet_pton(int af, const pj_str_t *src, void *dst);
698 * This function converts a numeric address into a text string suitable
699 * for presentation. It supports both IPv4 and IPv6 address
701 * @see pj_sockaddr_print()
703 * @param af Specify the family of the address. This can be PJ_AF_INET
705 * @param src Points to a buffer holding an IPv4 address if the af argument
706 * is PJ_AF_INET, or an IPv6 address if the af argument is
707 * PJ_AF_INET6; the address must be in network byte order.
708 * @param dst Points to a buffer where the function stores the resulting
709 * text string; it shall not be NULL.
710 * @param size Specifies the size of this buffer, which shall be large
711 * enough to hold the text string (PJ_INET_ADDRSTRLEN characters
712 * for IPv4, PJ_INET6_ADDRSTRLEN characters for IPv6).
714 * @return PJ_SUCCESS if conversion was successful.
716 PJ_DECL(pj_status_t) pj_inet_ntop(int af, const void *src,
717 char *dst, int size);
720 * Converts numeric address into its text string representation.
721 * @see pj_sockaddr_print()
723 * @param af Specify the family of the address. This can be PJ_AF_INET
725 * @param src Points to a buffer holding an IPv4 address if the af argument
726 * is PJ_AF_INET, or an IPv6 address if the af argument is
727 * PJ_AF_INET6; the address must be in network byte order.
728 * @param dst Points to a buffer where the function stores the resulting
729 * text string; it shall not be NULL.
730 * @param size Specifies the size of this buffer, which shall be large
731 * enough to hold the text string (PJ_INET_ADDRSTRLEN characters
732 * for IPv4, PJ_INET6_ADDRSTRLEN characters for IPv6).
734 * @return The address string or NULL if failed.
736 PJ_DECL(char*) pj_inet_ntop2(int af, const void *src,
737 char *dst, int size);
740 * Print socket address.
742 * @param addr The socket address.
743 * @param buf Text buffer.
744 * @param size Size of buffer.
745 * @param flags Bitmask combination of these value:
746 * - 1: port number is included.
747 * - 2: square bracket is included for IPv6 address.
749 * @return The address string.
751 PJ_DECL(char*) pj_sockaddr_print(const pj_sockaddr_t *addr,
756 * Convert address string with numbers and dots to binary IP address.
758 * @param cp The IP address in numbers and dots notation.
759 * @return If success, the IP address is returned in network
760 * byte order. If failed, PJ_INADDR_NONE will be
763 * This is an obsolete interface to #pj_inet_aton(); it is obsolete
764 * because -1 is a valid address (255.255.255.255), and #pj_inet_aton()
765 * provides a cleaner way to indicate error return.
767 PJ_DECL(pj_in_addr) pj_inet_addr(const pj_str_t *cp);
770 * Convert address string with numbers and dots to binary IP address.
772 * @param cp The IP address in numbers and dots notation.
773 * @return If success, the IP address is returned in network
774 * byte order. If failed, PJ_INADDR_NONE will be
777 * This is an obsolete interface to #pj_inet_aton(); it is obsolete
778 * because -1 is a valid address (255.255.255.255), and #pj_inet_aton()
779 * provides a cleaner way to indicate error return.
781 PJ_DECL(pj_in_addr) pj_inet_addr2(const char *cp);
784 * Initialize IPv4 socket address based on the address and port info.
785 * The string address may be in a standard numbers and dots notation or
786 * may be a hostname. If hostname is specified, then the function will
787 * resolve the host into the IP address.
789 * @see pj_sockaddr_init()
791 * @param addr The IP socket address to be set.
792 * @param cp The address string, which can be in a standard
793 * dotted numbers or a hostname to be resolved.
794 * @param port The port number, in host byte order.
796 * @return Zero on success.
798 PJ_DECL(pj_status_t) pj_sockaddr_in_init( pj_sockaddr_in *addr,
803 * Initialize IP socket address based on the address and port info.
804 * The string address may be in a standard numbers and dots notation or
805 * may be a hostname. If hostname is specified, then the function will
806 * resolve the host into the IP address.
808 * @see pj_sockaddr_in_init()
810 * @param af Internet address family.
811 * @param addr The IP socket address to be set.
812 * @param cp The address string, which can be in a standard
813 * dotted numbers or a hostname to be resolved.
814 * @param port The port number, in host byte order.
816 * @return Zero on success.
818 PJ_DECL(pj_status_t) pj_sockaddr_init(int af,
824 * Compare two socket addresses.
826 * @param addr1 First address.
827 * @param addr2 Second address.
829 * @return Zero on equal, -1 if addr1 is less than addr2,
830 * and +1 if addr1 is more than addr2.
832 PJ_DECL(int) pj_sockaddr_cmp(const pj_sockaddr_t *addr1,
833 const pj_sockaddr_t *addr2);
836 * Get pointer to the address part of a socket address.
838 * @param addr Socket address.
840 * @return Pointer to address part (sin_addr or sin6_addr,
841 * depending on address family)
843 PJ_DECL(void*) pj_sockaddr_get_addr(const pj_sockaddr_t *addr);
846 * Check that a socket address contains a non-zero address part.
848 * @param addr Socket address.
850 * @return Non-zero if address is set to non-zero.
852 PJ_DECL(pj_bool_t) pj_sockaddr_has_addr(const pj_sockaddr_t *addr);
855 * Get the address part length of a socket address, based on its address
856 * family. For PJ_AF_INET, the length will be sizeof(pj_in_addr), and
857 * for PJ_AF_INET6, the length will be sizeof(pj_in6_addr).
859 * @param addr Socket address.
861 * @return Length in bytes.
863 PJ_DECL(unsigned) pj_sockaddr_get_addr_len(const pj_sockaddr_t *addr);
866 * Get the socket address length, based on its address
867 * family. For PJ_AF_INET, the length will be sizeof(pj_sockaddr_in), and
868 * for PJ_AF_INET6, the length will be sizeof(pj_sockaddr_in6).
870 * @param addr Socket address.
872 * @return Length in bytes.
874 PJ_DECL(unsigned) pj_sockaddr_get_len(const pj_sockaddr_t *addr);
877 * Copy only the address part (sin_addr/sin6_addr) of a socket address.
879 * @param dst Destination socket address.
880 * @param src Source socket address.
882 * @see @pj_sockaddr_cp()
884 PJ_DECL(void) pj_sockaddr_copy_addr(pj_sockaddr *dst,
885 const pj_sockaddr *src);
887 * Copy socket address. This will copy the whole structure depending
888 * on the address family of the source socket address.
890 * @param dst Destination socket address.
891 * @param src Source socket address.
893 * @see @pj_sockaddr_copy_addr()
895 PJ_DECL(void) pj_sockaddr_cp(pj_sockaddr_t *dst, const pj_sockaddr_t *src);
898 * Get the IP address of an IPv4 socket address.
899 * The address is returned as 32bit value in host byte order.
901 * @param addr The IP socket address.
902 * @return 32bit address, in host byte order.
904 PJ_DECL(pj_in_addr) pj_sockaddr_in_get_addr(const pj_sockaddr_in *addr);
907 * Set the IP address of an IPv4 socket address.
909 * @param addr The IP socket address.
910 * @param hostaddr The host address, in host byte order.
912 PJ_DECL(void) pj_sockaddr_in_set_addr(pj_sockaddr_in *addr,
913 pj_uint32_t hostaddr);
916 * Set the IP address of an IP socket address from string address,
917 * with resolving the host if necessary. The string address may be in a
918 * standard numbers and dots notation or may be a hostname. If hostname
919 * is specified, then the function will resolve the host into the IP
922 * @see pj_sockaddr_set_str_addr()
924 * @param addr The IP socket address to be set.
925 * @param cp The address string, which can be in a standard
926 * dotted numbers or a hostname to be resolved.
928 * @return PJ_SUCCESS on success.
930 PJ_DECL(pj_status_t) pj_sockaddr_in_set_str_addr( pj_sockaddr_in *addr,
934 * Set the IP address of an IPv4 or IPv6 socket address from string address,
935 * with resolving the host if necessary. The string address may be in a
936 * standard IPv6 or IPv6 address or may be a hostname. If hostname
937 * is specified, then the function will resolve the host into the IP
938 * address according to the address family.
940 * @param af Address family.
941 * @param addr The IP socket address to be set.
942 * @param cp The address string, which can be in a standard
943 * IP numbers (IPv4 or IPv6) or a hostname to be resolved.
945 * @return PJ_SUCCESS on success.
947 PJ_DECL(pj_status_t) pj_sockaddr_set_str_addr(int af,
952 * Get the port number of a socket address, in host byte order.
953 * This function can be used for both IPv4 and IPv6 socket address.
955 * @param addr Socket address.
957 * @return Port number, in host byte order.
959 PJ_DECL(pj_uint16_t) pj_sockaddr_get_port(const pj_sockaddr_t *addr);
962 * Get the transport layer port number of an Internet socket address.
963 * The port is returned in host byte order.
965 * @param addr The IP socket address.
966 * @return Port number, in host byte order.
968 PJ_DECL(pj_uint16_t) pj_sockaddr_in_get_port(const pj_sockaddr_in *addr);
971 * Set the port number of an Internet socket address.
973 * @param addr The socket address.
974 * @param hostport The port number, in host byte order.
976 PJ_DECL(pj_status_t) pj_sockaddr_set_port(pj_sockaddr *addr,
977 pj_uint16_t hostport);
980 * Set the port number of an IPv4 socket address.
982 * @see pj_sockaddr_set_port()
984 * @param addr The IP socket address.
985 * @param hostport The port number, in host byte order.
987 PJ_DECL(void) pj_sockaddr_in_set_port(pj_sockaddr_in *addr,
988 pj_uint16_t hostport);
991 * Parse string containing IP address and optional port into socket address,
992 * possibly also with address family detection. This function supports both
993 * IPv4 and IPv6 parsing, however IPv6 parsing may only be done if IPv6 is
994 * enabled during compilation.
996 * This function supports parsing several formats. Sample IPv4 inputs and
997 * their default results::
998 * - "10.0.0.1:80": address 10.0.0.1 and port 80.
999 * - "10.0.0.1": address 10.0.0.1 and port zero.
1000 * - "10.0.0.1:": address 10.0.0.1 and port zero.
1001 * - "10.0.0.1:0": address 10.0.0.1 and port zero.
1002 * - ":80": address 0.0.0.0 and port 80.
1003 * - ":": address 0.0.0.0 and port 0.
1004 * - "localhost": address 127.0.0.1 and port 0.
1005 * - "localhost:": address 127.0.0.1 and port 0.
1006 * - "localhost:80": address 127.0.0.1 and port 80.
1008 * Sample IPv6 inputs and their default results:
1009 * - "[fec0::01]:80": address fec0::01 and port 80
1010 * - "[fec0::01]": address fec0::01 and port 0
1011 * - "[fec0::01]:": address fec0::01 and port 0
1012 * - "[fec0::01]:0": address fec0::01 and port 0
1013 * - "fec0::01": address fec0::01 and port 0
1014 * - "fec0::01:80": address fec0::01:80 and port 0
1015 * - "::": address zero (::) and port 0
1016 * - "[::]": address zero (::) and port 0
1017 * - "[::]:": address zero (::) and port 0
1018 * - ":::": address zero (::) and port 0
1019 * - "[::]:80": address zero (::) and port 0
1020 * - ":::80": address zero (::) and port 80
1022 * Note: when the IPv6 socket address contains port number, the IP
1023 * part of the socket address should be enclosed with square brackets,
1024 * otherwise the port number will be included as part of the IP address
1025 * (see "fec0::01:80" example above).
1027 * @param af Optionally specify the address family to be used. If the
1028 * address family is to be deducted from the input, specify
1029 * pj_AF_UNSPEC() here. Other supported values are
1030 * #pj_AF_INET() and #pj_AF_INET6()
1031 * @param options Additional options to assist the parsing, must be zero
1033 * @param str The input string to be parsed.
1034 * @param addr Pointer to store the result.
1036 * @return PJ_SUCCESS if the parsing is successful.
1038 * @see pj_sockaddr_parse2()
1040 PJ_DECL(pj_status_t) pj_sockaddr_parse(int af, unsigned options,
1041 const pj_str_t *str,
1045 * This function is similar to #pj_sockaddr_parse(), except that it will not
1046 * convert the hostpart into IP address (thus possibly resolving the hostname
1047 * into a #pj_sockaddr.
1049 * Unlike #pj_sockaddr_parse(), this function has a limitation that if port
1050 * number is specified in an IPv6 input string, the IP part of the IPv6 socket
1051 * address MUST be enclosed in square brackets, otherwise the port number will
1052 * be considered as part of the IPv6 IP address.
1054 * @param af Optionally specify the address family to be used. If the
1055 * address family is to be deducted from the input, specify
1056 * #pj_AF_UNSPEC() here. Other supported values are
1057 * #pj_AF_INET() and #pj_AF_INET6()
1058 * @param options Additional options to assist the parsing, must be zero
1060 * @param str The input string to be parsed.
1061 * @param hostpart Optional pointer to store the host part of the socket
1062 * address, with any brackets removed.
1063 * @param port Optional pointer to store the port number. If port number
1064 * is not found, this will be set to zero upon return.
1065 * @param raf Optional pointer to store the detected address family of
1066 * the input address.
1068 * @return PJ_SUCCESS if the parsing is successful.
1070 * @see pj_sockaddr_parse()
1072 PJ_DECL(pj_status_t) pj_sockaddr_parse2(int af, unsigned options,
1073 const pj_str_t *str,
1078 /*****************************************************************************
1080 * HOST NAME AND ADDRESS.
1082 *****************************************************************************
1086 * Get system's host name.
1088 * @return The hostname, or empty string if the hostname can not
1091 PJ_DECL(const pj_str_t*) pj_gethostname(void);
1094 * Get host's IP address, which the the first IP address that is resolved
1095 * from the hostname.
1097 * @return The host's IP address, PJ_INADDR_NONE if the host
1098 * IP address can not be identified.
1100 PJ_DECL(pj_in_addr) pj_gethostaddr(void);
1103 /*****************************************************************************
1107 *****************************************************************************
1111 * Create new socket/endpoint for communication.
1113 * @param family Specifies a communication domain; this selects the
1114 * protocol family which will be used for communication.
1115 * @param type The socket has the indicated type, which specifies the
1116 * communication semantics.
1117 * @param protocol Specifies a particular protocol to be used with the
1118 * socket. Normally only a single protocol exists to support
1119 * a particular socket type within a given protocol family,
1120 * in which a case protocol can be specified as 0.
1121 * @param sock New socket descriptor, or PJ_INVALID_SOCKET on error.
1123 * @return Zero on success.
1125 PJ_DECL(pj_status_t) pj_sock_socket(int family,
1131 * Close the socket descriptor.
1133 * @param sockfd The socket descriptor.
1135 * @return Zero on success.
1137 PJ_DECL(pj_status_t) pj_sock_close(pj_sock_t sockfd);
1141 * This function gives the socket sockfd the local address my_addr. my_addr is
1142 * addrlen bytes long. Traditionally, this is called assigning a name to
1143 * a socket. When a socket is created with #pj_sock_socket(), it exists in a
1144 * name space (address family) but has no name assigned.
1146 * @param sockfd The socket desriptor.
1147 * @param my_addr The local address to bind the socket to.
1148 * @param addrlen The length of the address.
1150 * @return Zero on success.
1152 PJ_DECL(pj_status_t) pj_sock_bind( pj_sock_t sockfd,
1153 const pj_sockaddr_t *my_addr,
1157 * Bind the IP socket sockfd to the given address and port.
1159 * @param sockfd The socket descriptor.
1160 * @param addr Local address to bind the socket to, in host byte order.
1161 * @param port The local port to bind the socket to, in host byte order.
1163 * @return Zero on success.
1165 PJ_DECL(pj_status_t) pj_sock_bind_in( pj_sock_t sockfd,
1171 * Listen for incoming connection. This function only applies to connection
1172 * oriented sockets (such as PJ_SOCK_STREAM or PJ_SOCK_SEQPACKET), and it
1173 * indicates the willingness to accept incoming connections.
1175 * @param sockfd The socket descriptor.
1176 * @param backlog Defines the maximum length the queue of pending
1177 * connections may grow to.
1179 * @return Zero on success.
1181 PJ_DECL(pj_status_t) pj_sock_listen( pj_sock_t sockfd,
1185 * Accept new connection on the specified connection oriented server socket.
1187 * @param serverfd The server socket.
1188 * @param newsock New socket on success, of PJ_INVALID_SOCKET if failed.
1189 * @param addr A pointer to sockaddr type. If the argument is not NULL,
1190 * it will be filled by the address of connecting entity.
1191 * @param addrlen Initially specifies the length of the address, and upon
1192 * return will be filled with the exact address length.
1194 * @return Zero on success, or the error number.
1196 PJ_DECL(pj_status_t) pj_sock_accept( pj_sock_t serverfd,
1198 pj_sockaddr_t *addr,
1203 * The file descriptor sockfd must refer to a socket. If the socket is of
1204 * type PJ_SOCK_DGRAM then the serv_addr address is the address to which
1205 * datagrams are sent by default, and the only address from which datagrams
1206 * are received. If the socket is of type PJ_SOCK_STREAM or PJ_SOCK_SEQPACKET,
1207 * this call attempts to make a connection to another socket. The
1208 * other socket is specified by serv_addr, which is an address (of length
1209 * addrlen) in the communications space of the socket. Each communications
1210 * space interprets the serv_addr parameter in its own way.
1212 * @param sockfd The socket descriptor.
1213 * @param serv_addr Server address to connect to.
1214 * @param addrlen The length of server address.
1216 * @return Zero on success.
1218 PJ_DECL(pj_status_t) pj_sock_connect( pj_sock_t sockfd,
1219 const pj_sockaddr_t *serv_addr,
1223 * Return the address of peer which is connected to socket sockfd.
1225 * @param sockfd The socket descriptor.
1226 * @param addr Pointer to sockaddr structure to which the address
1228 * @param namelen Initially the length of the addr. Upon return the value
1229 * will be set to the actual length of the address.
1231 * @return Zero on success.
1233 PJ_DECL(pj_status_t) pj_sock_getpeername(pj_sock_t sockfd,
1234 pj_sockaddr_t *addr,
1238 * Return the current name of the specified socket.
1240 * @param sockfd The socket descriptor.
1241 * @param addr Pointer to sockaddr structure to which the address
1243 * @param namelen Initially the length of the addr. Upon return the value
1244 * will be set to the actual length of the address.
1246 * @return Zero on success.
1248 PJ_DECL(pj_status_t) pj_sock_getsockname( pj_sock_t sockfd,
1249 pj_sockaddr_t *addr,
1253 * Get socket option associated with a socket. Options may exist at multiple
1254 * protocol levels; they are always present at the uppermost socket level.
1256 * @param sockfd The socket descriptor.
1257 * @param level The level which to get the option from.
1258 * @param optname The option name.
1259 * @param optval Identifies the buffer which the value will be
1261 * @param optlen Initially contains the length of the buffer, upon
1262 * return will be set to the actual size of the value.
1264 * @return Zero on success.
1266 PJ_DECL(pj_status_t) pj_sock_getsockopt( pj_sock_t sockfd,
1268 pj_uint16_t optname,
1272 * Manipulate the options associated with a socket. Options may exist at
1273 * multiple protocol levels; they are always present at the uppermost socket
1276 * @param sockfd The socket descriptor.
1277 * @param level The level which to get the option from.
1278 * @param optname The option name.
1279 * @param optval Identifies the buffer which contain the value.
1280 * @param optlen The length of the value.
1282 * @return PJ_SUCCESS or the status code.
1284 PJ_DECL(pj_status_t) pj_sock_setsockopt( pj_sock_t sockfd,
1286 pj_uint16_t optname,
1292 * Receives data stream or message coming to the specified socket.
1294 * @param sockfd The socket descriptor.
1295 * @param buf The buffer to receive the data or message.
1296 * @param len On input, the length of the buffer. On return,
1297 * contains the length of data received.
1298 * @param flags Flags (such as pj_MSG_PEEK()).
1300 * @return PJ_SUCCESS or the error code.
1302 PJ_DECL(pj_status_t) pj_sock_recv(pj_sock_t sockfd,
1308 * Receives data stream or message coming to the specified socket.
1310 * @param sockfd The socket descriptor.
1311 * @param buf The buffer to receive the data or message.
1312 * @param len On input, the length of the buffer. On return,
1313 * contains the length of data received.
1314 * @param flags Flags (such as pj_MSG_PEEK()).
1315 * @param from If not NULL, it will be filled with the source
1316 * address of the connection.
1317 * @param fromlen Initially contains the length of from address,
1318 * and upon return will be filled with the actual
1319 * length of the address.
1321 * @return PJ_SUCCESS or the error code.
1323 PJ_DECL(pj_status_t) pj_sock_recvfrom( pj_sock_t sockfd,
1327 pj_sockaddr_t *from,
1331 * Transmit data to the socket.
1333 * @param sockfd Socket descriptor.
1334 * @param buf Buffer containing data to be sent.
1335 * @param len On input, the length of the data in the buffer.
1336 * Upon return, it will be filled with the length
1338 * @param flags Flags (such as pj_MSG_DONTROUTE()).
1340 * @return PJ_SUCCESS or the status code.
1342 PJ_DECL(pj_status_t) pj_sock_send(pj_sock_t sockfd,
1348 * Transmit data to the socket to the specified address.
1350 * @param sockfd Socket descriptor.
1351 * @param buf Buffer containing data to be sent.
1352 * @param len On input, the length of the data in the buffer.
1353 * Upon return, it will be filled with the length
1355 * @param flags Flags (such as pj_MSG_DONTROUTE()).
1356 * @param to The address to send.
1357 * @param tolen The length of the address in bytes.
1359 * @return PJ_SUCCESS or the status code.
1361 PJ_DECL(pj_status_t) pj_sock_sendto(pj_sock_t sockfd,
1365 const pj_sockaddr_t *to,
1370 * The shutdown call causes all or part of a full-duplex connection on the
1371 * socket associated with sockfd to be shut down.
1373 * @param sockfd The socket descriptor.
1374 * @param how If how is PJ_SHUT_RD, further receptions will be
1375 * disallowed. If how is PJ_SHUT_WR, further transmissions
1376 * will be disallowed. If how is PJ_SHUT_RDWR, further
1377 * receptions andtransmissions will be disallowed.
1379 * @return Zero on success.
1381 PJ_DECL(pj_status_t) pj_sock_shutdown( pj_sock_t sockfd,
1392 #endif /* __PJ_SOCK_H__ */