Compatibility:
- Version 1.6.0 is not compatible with versions < 1.6.0 because of several
fixes related to IETF RFCs that change the format of ROHC packets.
- The library API is mainly compatible with earlier versions: some private
entities that were made public by mistake are not public anymore. It
might break some programs that were using them by mistake.
License/Authors:
- Mikhail Gruzdev, Thales Communications, and Viveris Technologies for
Linux kernel support.
- Audric Schiltknecht and Julien Bernard from Viveris Technologies for
constant IP-ID support, the new RTP profile detection mechanism, and
the new trace framework.
- Yura for the ROHC fuzzer.
- Raman Gupta for ROHC-over-Ethernet tunnel support.
Acknowledgments for bug reports and/or bug fixes:
Audric Schiltknecht, FWX, Elisabeth, Julien Bernard, Raman Gupta,
Viveris Technologies, Yura.
Main changes:
- ROHC protocol:
- Support for constant IP-ID as specified by §3.3 of RFC 3843.
- Support for ROHC segment as specified by §5.2.5 of RFC 3095.
- Improve handling of TS, TS_STRIDE, TS_OFFSET and TS_SCALED values.
- Protect STATIC-NACK feedback with CRC. CRC is required if changing
operation mode.
- Several compression/decompression bugs (see below).
- Library API/usage:
- Improve RTP profile detection with a new user callback or with new
API functions to add/remove/reset UDP ports dedicated to RTP traffic.
- Add new trace framework with user-defined callbacks.
- Portability:
- Support for Linux kernel.
- Support for OpenBSD (tested on 5.3 thanks to Audric Schiltknecht).
- Support for mingw64.
- Support for CYGWIN.
- Support for GCC 4.8, Clang 3.2, and TCC.
- RPM spec file for CentOS 5/6, Fedora 17/18 and RHEL 5.
API changes:
- Add rohc_compress2(), rohc_comp_get_segment() and return code
ROHC_NEED_SEGMENT to handle ROHC segments.
- Update rohc_decompress() to return ROHC_NON_FINAL_SEGMENT to handle ROHC
segments.
- rohc_compress() is deprecated by rohc_compress2().
- Add rohc_comp_set_rtp_detection_cb() to define the user-defined RTP
detection callback.
- Add rohc_comp_add_rtp_port(), rohc_comp_remove_rtp_port(), and
rohc_comp_reset_rtp_ports() to manage the UDP ports dedicated to RTP
streams.
- Add rohc_comp_set_traces_cb() and rohc_decomp_set_traces_cb() to manage
library traces with user-defined callbacks.
- Add rohc_feedback_remove_locked() (remove feedbacks once transmitted),
rohc_feedback_unlock() (restore feedbacks if transmission failed).
- Add rohc_comp_get_last_packet_info2() to get compression statistics.
- rohc_comp_get_last_packet_info() is deprecated by
rohc_comp_get_last_packet_info2().
- Add rohc_decomp_get_last_packet_info() to get decompression statistics.
- Add functions rohc_comp_get_general_info(), rohc_comp_get_mrru(),
rohc_comp_get_max_cid() and rohc_comp_get_cid_type() to replace
functions rohc_c_info(), rohc_c_statistics() and rohc_c_context() that
are now deprecated.
- Add rohc_comp_force_contexts_reinit() to re-initialize compression
contexts.
- Remove nonnull as function attribute for public API.
- public header cleanup: move some private definitions from rohc.h to
private headers.
- public header cleanup: move all private decompressor definitions from
rohc_decomp.h to rohc_decomp_internals.h
Build system:
- Append bzr revision number to library version if built from bzr.
- Split --enable-rohc-apps into several different options (see below).
- Add --disable-deprecated-api to disable deprecated code (testing only).
- Change the behavior of the --enable-rohc-debug configure option:
Old behavior: --enable-rohc-debug={1,2,3} configured as build time the
level of debug of the library.
New behavior: --enable-rohc-debug={yes,no} configures only extra debug
for the library.
Debug traces are managed by the new trace framework. Extra debug traces
that may reduce the library performances are only enabled if
--enable-rohc-debug or --enable-rohc-debug=yes are specified. The extra
debug traces are off by default.
- Use CPPFLAGS for -I options instead of CFLAGS.
- Do not override CFLAGS, CPPFLAGS, and LDFLAGS in configure.
- Support out-of-sources builds.
- Support Clang 3.2.
- Support GCC 4.8.
Q&A:
- Add const keywords in several function prototypes.
- Fix warnings emitted by the static code analyzer of the Clang compiler.
- Improve the robustness of the compressor API.
- Improve test coverage.
- Improve API documentation.
- Move all private definitions out from public headers.
- Define many private functions as static in UDP and UDP-Lite profiles.
Performances:
- Simplify the rohc_f_32bits() function.
- Introduce a context key to quickly match packets and contexts.
- Stop search for the compression context if all used contexts were
already checked.
- Create all compression contexts at init instead of at runtime.
- Dump compressed and uncompressed packets only in extra debug mode.
- Avoid using zfree() when free() is enough.
Applications:
General:
- Split --enable-rohc-apps into several different options:
--enable-app-fuzzer --enable-app-performance
--enable-app-sniffer --enable-app-tunnel
ROHC-over-UDP tunnel:
- Handle decompression.
- Handle small/large CIDs and MAX_CID.
- Add ROHC-over-Ethernet support (Raman Gupta).
- Avoid using internal information from the library.
- Fix the usage description.
ROHC sniffer:
- New tool that permits to easily test the library on a real network
without affecting it. The program sniffs IP packets from a given
network interface, and tests the ROHC library with them. The packets
are compressed, then decompressed, and finally compared with the
original IP packets.
ROHC fuzzer:
- New tool that checks the robustness of the ROHC decompressor with
random ROHC packets. Contributed by Yura.
Performances test:
- Increase test duration for CPU frequency.
Bug fixes:
Bug #799206: Build ROHC library with tcc
Bug #804565: Measure test coverage
Bug #813128: Build fails with CYGWIN on Windows
Bug #1038637: RTP profile: RTP header with extension flag set not
correctly handled
Bug #1050980: Add fuzz testing
Bug #1051619: Check library build and tests on OpenBSD
Bug #1069411: Support Linux kernel
Bug #1071413: Tests build failure related to pcap.h
Bug #1080035: Decompression failure with simultaneous TS_STRIDE changes
and packet loss
Bug #1080055: Decompression failure caused by RTP stream with lost packet
but irregular IP-ID
Bug #1083294: Crash while decompressing RTP stream with large TS jump and
UOR-2 disambiguation
Bug #1087682: decompressor: zero-length packet causes a crash
Bug #1087683: decompressor: compressed list with 8-bit XI fields (PS=1)
cause a crash
Bug #1087979: Test failure on FreeBSD 7
Bug #1088004: Decompression failure of specific IPv4 stream with changing
RND
Bug #1089106: Compressor asserts because of non-RTP traffic with 14 SN
bits to transmit
Bug #1090069: Decompressor: crash caused by malformed (too short) IR and
IR-DYN packets
Bug #1092660: Problem with RTP streams with Padding bit set
Bug #1093836: Decompressor crash because of lossy RTP stream with SN
wraparound
Bug #1093846: Possible decompressor crash with malformed extension header
list
Bug #1094452: Decompressor contexts incorrectly preserved if MAX_CID is
changed
Bug #1094710: Build failure on CentOS 6
Bug #1094712: Tests fail to build on FreeBSD 7.4
Bug #1096358: Decompression fails if IPv6 extensions list is not present
anymore
Bug #1096586: Tests use an unsupported option for Valgrind <= 3.6.0
Bug #1105935: Malformed uncompressed packets may crash the ROHC compressor
Bug #1105963: Uncompressed profile: Normal packet cannot be used for
non-IPv4/v6 packets
Bug #1115091: Crash when decompressing list types 1/2/3 if no reference
list was already set
Bug #1166618: UOR-2 extension options for IPv6
Bug #1178441: Malformed IP packet used in code example
Bug #1181829: decompressor crash with truncated UOR-2 packets of the RTP
profile
