Libre

README

libre - "Generic library for real-time communications with async IO support" Copyright (C) 2010 - 2012 Creytiv.com

Distributed under BSD license

Design goals:

• Portable POSIX source code (ANSI C89 and ISO C99 standard)
• Robust, fast, low memory footprint
• RFC compliance
• IPv4 and IPv6 support

Modules:

name: status: description:

• base64 testing Base-64 encoding/decoding functions
• bfcp unstable The Binary Floor Control Protocol (BFCP)
• conf testing Configuration file parser
• crc32 testing 32-bit CRC defined in ITU V.42
• dbg testing Debug printing
• dns testing DNS resolving (NAPTR, SRV, A)
• fmt testing Formatted printing and regular expression
• hash testing Hashmap table
• hmac testing HMAC: Keyed-Hashing for Message Authentication
• httpauth unstable HTTP-based Authentication (RFC 2617)
• ice unstable Interactive Connectivity Establishment (ICE)
• jbuf testing Jitter buffer
• list stable Sortable doubly-linked list handling
• lock testing Resource locking functions
• main testing Main poll loop
• mbuf stable Linear memory buffers
• md5 stable The MD5 Message-Digest Algorithm (RFC 1321)
• mem stable Memory referencing
• mod testing Run-time module loading
• mqueue testing Thread-safe message queue
• natbd unstable NAT Behavior Discovery using STUN
• net unstable Networking routines
• rtp testing Real-time Transport Protocol
• sa stable Socket Address functions
• sdp unstable Session Description Protocol
• sha testing Secure Hash Standard, NIST, FIPS PUB 180-1
• sip unstable Core SIP library
• sipevent unstable SIP Event framework
• sipreg testing SIP register client
• sipsess unstable SIP Sessions
• stun unstable Session Traversal Utilities for NAT (STUN)
• sys testing System information
• tcp testing TCP transport
• telev testing Telephony Events (RFC 4733)
• tls unstable Transport Layer Security
• tmr stable Timer handling
• turn testing Obtaining Relay Addresses from STUN (TURN)
• udp testing UDP transport
• uri testing Generic URI library

legend: "stable" - Code complete; Stable code and stable API "testing" - Code complete, but API might change "unstable" - Code complete but not completely tested "development" - Code is under development

Features:

• RFC 1321 - The MD5 Message-Digest Algorithm
• RFC 1886 - DNS Extensions to support IP version 6
• RFC 2032 - RTP Payload Format for H.261 Video Streams
• RFC 2617 - HTTP Authentication: Basic and Digest Access Authentication
• RFC 2782 - A DNS RR for Specifying the Location of Services (DNS SRV)
• RFC 2915 - The Naming Authority Pointer (NAPTR) DNS Resource Record
• RFC 3261 - SIP: Session Initiation Protocol
• RFC 3263 - Locating SIP Servers
• RFC 3264 - An Offer/Answer Model with SDP
• RFC 3265 - SIP-Specific Event Notification
• RFC 3327 - SIP Extension Header Field for Registering Non-Adjacent Contacts
• RFC 3428 - SIP Extension for Instant Messaging
• RFC 3489 - STUN - Simple Traversal of UDP Through NATs
• RFC 3515 - The SIP Refer Method
• RFC 3550 - RTP: A Transport Protocol for Real-Time Applications
• RFC 3551 - RTP Profile for Audio and Video Conferences with Minimal Control
• RFC 3555 - MIME Type Registration of RTP Payload Formats
• RFC 3556 - SDP Bandwidth Modifiers for RTCP Bandwidth
• RFC 3581 - An Extension to SIP for Symmetric Response Routing
• RFC 3605 - RTCP attribute in SDP
• RFC 3969 - The IANA URI Parameter Registry for SIP
• RFC 3994 - Indication of Message Composition for Instant Messaging
• RFC 4346 - The TLS Protocol Version 1.1
• RFC 4566 - SDP: Session Description Protocol
• RFC 4582 - The Binary Floor Control Protocol (BFCP)
• RFC 4585 - Extended RTP Profile for RTCP-Based Feedback
• RFC 4733 - RTP Payload for DTMF Digits, Telephony Tones, and Teleph. Signals
• RFC 4961 - Symmetric RTP / RTP Control Protocol (RTCP)
• RFC 5118 - SIP Torture Test Messages for IPv6
• RFC 5245 - Interactive Connectivity Establishment (ICE)
• RFC 5389 - Session Traversal Utilities for NAT (STUN)
• RFC 5626 - Managing Client-Initiated Connections in SIP
• RFC 5761 - Multiplexing RTP Data and Control Packets on a Single Port
• RFC 5766 - Traversal Using Relays around NAT (TURN)
• RFC 5768 - Indicating Support for ICE in SIP
• RFC 5769 - Test vectors for STUN
• RFC 5780 - NAT Behaviour Discovery Using STUN
• RFC 6026 - Correct Transaction Handling for 2xx Resp. to SIP INVITE Requests
• RFC 6156 - TURN Extension for IPv6
• Symmetric RTP
• ITU-T G.711 Appendix I and Appendix II

Supported platforms:

• Linux
• FreeBSD
• OpenBSD
• NetBSD
• Symbian OS
• Solaris
• Windows
• Apple Mac OS X and iOS
• Android

Supported compilers:

• gcc (v2.9x to v4.x)
• gcce
• ms vc2003 compiler
• codewarrior

Feedback:

• Please send feedback to libre@creytiv.com

Coding guidelines:

• Use enum for constants where appropriate
• Use const as much as possible (where appropriate)
• Use C99 data types (intN_t, uintN_t, bool)
• Hide data-types in .c files where possible (use struct foo)
• Avoid malloc/free, use mem_alloc/mem_deref instead
• CVS/svn/git tags are NOT allowed in the code!
• Avoid bit-fields in structs which are not portable
• Use dummy handlers for timing-critical callbacks
• return err, return alloced objects as pointer-pointers
• in allocating functions, first arg is always double pointer
• Use POSIX error-codes; EINVAL for invalid args, EBADMSG for parse errors and EPROTO for protocol errors