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* socket.c: build multiaddr socket API helpers only if used by public APIsPau Espin Pedrol2019-10-241-0/+4
| | | | | | | | | Those two functions are only used by osmo_sock_init2_multiaddr(), which is only built if HAVE_LIBSCTP is defined. Avoid compiler warning about unusued function helpers if osmo_sock_init2_multiaddr() is not being built. Change-Id: I52769d6b8f70af1a8bda23d60b3230a932e71fab
* socket: Remove unneeded condition check in osmo_sock_init2_multiaddr()Pau Espin Pedrol2019-10-211-15/+15
| | | | | | | | | Since we return error at the start of the function if proto != IPPROTO_SCTP, it makes no sense to check for proto != IPPROTO_UDP later on. Fixes: CID#205088 Change-Id: Ibba7eacaa9debb77d536d47dc85170c5ee79e479
* socket: Introduce API osmo_sock_init2_multiaddr()Pau Espin Pedrol2019-10-181-0/+286
| | | | | | | | | This API will be used by libosmo-netif's osmo_stream for SCTP sockets, which in turn will be used by libosmo-sccp to support multi-homed connections. Related: OS#3608 Change-Id: Ic8681d9e093216c99c6bca4be81c31ef83688ed1
* socket.c: Move glibc workarounds to same place in addrinfo_helper()Pau Espin Pedrol2019-10-101-19/+10
| | | | Change-Id: Ifc3a30881f865f88bcfc1307a3c89c1ab79eecd4
* tell ubsan to ignore SUN_LENEric Wild2019-07-211-0/+3
| | | | | | | | | | | | | ubsan will report undefined behavior due to the SUN_LEN macros interaction with a null pointer, so let's tell ubsan to ignore this function. After carefully reviewing the final publically availlable drafts of the C99,C11 and C18 standards I can confirm that dereferencing null pointers is still undefined behavior, as such ubsan will always warn with absolutely every existing compiler version. Since the sanitizers are periodically synced between llvm and gcc I'm also fairly confident that rebuilding everything with compiler_rt to use the integrated sanitizers would result in the same message. I sincerly hope that this explanation provides to be sufficient, If not I'd be willing to show up at the next llvm dev meeting to provide quotes from actual sanitizer developers to back up these claims. Change-Id: I0ff445072f1b46390c9f70b21d61c789e39358d5
* make all library-internal static buffers thread-localHarald Welte2019-06-041-1/+1
| | | | | | | | | | | | | | | We have a number of library-internal static global buffers which are mainly used for various stringification functions. This worked as all of the related Osmocom programs were strictly single-threaded. Let's make those buffers at least thread-local. This way every thread gets their own set of buffers, and it's safe for multiple threads to execute the same functions once. They're of course still not re-entrant. If you need re-entrancy, you will need to use the _c() or _buf() suffix version of those functions and work with your own (stack or heap) buffers. Change-Id: I50eb2436a7c1261d79a9d2955584dce92780ca07
* socket.c: fix Doxygen doc for osmo_sock_unix_init_ofd()Vadim Yanitskiy2019-06-011-2/+2
| | | | | | One typo s/optionall/optionally/, and a few incorrect references. Change-Id: Iab42aa376b5cf4cf36413fede46e001c6b2d1525
* osmo_sock_get_name_*: Ensure string is returned in error caseHarald Welte2019-05-101-1/+3
| | | | | | | | | | | | | | osmo_sock_get_name_buf(): In case the getsockname() call is failing for some weird reason, we shouldn't return an uninitialized, non-zero-terminated string buffer to the caller, as most callers will be too lazy to test the return value. This holds even more true for users of the internal osmo_sock_get_name2() and osmo_sock_get_name2_c() functions which indeed very much ignore the return value of osmo_sock_get_name_buf(). Change-Id: I2d56327e96b7a6783cca38b828c5ee74aed776ae
* Fix incorrect buffer size calculationVadim Yanitskiy2019-04-121-1/+1
| | | | | | | | | | Calling sizeof() on a pointer to dynamically allocated memory would result in getting size of the pointer (usually 4 or 8 bytes) itself, but not the size of allocated memory. Change-Id: I8ffda4dea2b7f9b4b76dfeecad1fab6384c5a62c Fixes: CID#197629, CID#197628, CID#197627 Fixes: CID#197626, CID#197625, CID#197624
* Add _c versions of functions that otherwise return static buffersHarald Welte2019-04-101-0/+14
| | | | | | | | | | | | | | We have a habit of returning static buffers from some functions, particularly when generating some kind of string values. This is convenient in terms of memory management, but it comes at the expense of not being thread-safe, and not allowing for two calls of the related function within one printf() statement. Let's introduce _c suffix versions of those functions where the caller passes in a talloc context from which the output buffer shall be allocated. Change-Id: I8481c19b68ff67cfa22abb93c405ebcfcb0ab19b
* select: Rename BSC_FD_* constants to OSMO_FD_*Harald Welte2019-03-211-1/+1
| | | | | | | | | | | | The naming of these constants dates back to when the code was private within OpenBSC. Everything else was renamed (bsc_fd -> osmo_fd) at the time, but somehow the BSC_FD_* defines have been missed at the time. Keep compatibility #defines around, but allow us to migrate the applications to a less confusing naming meanwhile. Change-Id: Ifae33ed61a7cf0ae54ad487399e7dd2489986436
* socket: osmo_sock_get_name() Use "const void *" as talloc contextHarald Welte2019-03-191-1/+1
| | | | Change-Id: Ie6877277cddb0a9e049449c260afe3314ba65050
* socket: add define for socket name lengthPhilipp Maier2019-01-171-4/+2
| | | | | | | | | | | The function osmo_sock_get_name_buf() can be used to write a string representation to a user provided memory. Unfortunately the proper length for the user provided memory is not obvious. To make using osmo_sock_get_name_buf() more practical, add a define constant that defines the length of the required memory. Also use this define in socket.c. Change-Id: If8be8c2c0d4935da17ab13b2c2127b719ceefbcc
* add to osmo_sock_get_name*() APINeels Hofmeyr2018-12-191-17/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Basically, I am applying code review that I would have given had I not been on vacation when the last osmo_sock_get_name* stuff was merged. osmo_sock_get_name2() is so far a static internal function. However, it is nothing like osmo_sock_get_name(), so instead rename it to osmo_sock_get_ip_and_port(). Also make it public API, no need to hide it. I'm adding an "and" in the name to hopefully clarify: "ip_port" vs. "ip_and_port" -- there already are _get_X_ip_port() functions that only return the port string, despite "ip" in the name. Add new public osmo_sock_get_name2(), which is like osmo_sock_get_name(), except it uses a static string instead of talloc, and omits the braces. This is most convenient for log statement formats, avoiding dyn allocations. Add new osmo_sock_get_name_buf(), which is like osmo_sock_get_name2() but writes to a caller provided char buffer. Use osmo_sock_get_name_buf() in the implementation of osmo_sock_get_name(), but use another (non-static) local string buffer, because adding braces is too complex without talloc_snprintf(). Rationale: I want to improve the logging of socket errors, e.g. change DLMGCP ERROR Failed to read: 111/Connection refused (mgcp_client.c:720) to DLMGCP ERROR Failed to read: r=10.0.99.2:2427<->l=10.0.99.2:2728: 111='Connection refused' (mgcp_client.c:721) but it is just not handy to compose logging with the current API: - osmo_sock_get_name() requires a talloc_free(). - all the others require output buffers. - the only way to conveniently compose a logging string and, - notably, the only trivial way to skip the string composition if the logging level is currently muted, is to have a function that returns a static string: the new osmo_sock_get_name2(). - (I think the osmo_sock_get_{local,remote}_* convenience wrappers should never have been added, because they encourage the caller to invoke the same code twice, for IP addr and port, and throw away one half each time.) Related: Iae728192f499330d16836d9435648f6b8ed213b6 (osmo-mgw) Change-Id: I8ad89ac447c9c582742e70d082072bdd40a5a398
* Add osmo_sockaddr_in_to_str_and_uint()Max2018-12-071-5/+20
| | | | | | | | | It's similar to osmo_sockaddr_to_str_and_uint() but does not require odd typecasting for AF_INET case. Make osmo_sockaddr_to_str_and_uint() into wrapper around new function and make sure to check for address family before typecasting. Also use proper return type. Change-Id: Ie384483124d407a960ab6732e6a7fd90554389d2
* socket.c: fix IP and port buffer sizesOliver Smith2018-11-061-4/+4
| | | | | | | | Use INET6_ADDRSTRLEN (46) instead of 64 for IP address buffers, and 6 instead of 16 for port buffers (the highest possible port number is 65535). Change-Id: Ia25e2f3277ad2f60df31c08d12f42c1e6d2a14a6
* add osmo_sock_get_{local,remote}_ip{,_port}()Oliver Smith2018-10-261-25/+86
| | | | | | | | | | Return only the IP or port of either the local or remote connection, not the whole set of IP and port of both the local and remote connection like osmo_sock_get_name() does it. This is needed for OS#2841, where we only want to print the remote IP. Related: OS#2841 Change-Id: I6803c204771c59a2002bc6a0e6b79c83c35f87e1
* cosmetic: fix typo (soocket -> socket)Oliver Smith2018-10-251-1/+1
| | | | Change-Id: I2184bf12398902d933f3744bc094418cc6961e86
* ensure unix socket paths are NUL-terminated for bind/connectStefan Sperling2018-09-261-7/+5
| | | | | | | | | | | | | | | The unix(7) man page recommends that sun_path is NUL-terminated when struct sockaddr_un is passed to a bind() or connect() call. Non-NUL-terminated paths only need to be dealt with at the receiving end of a UNIX domain socket. Commit 896ff6d erroneously assumed otherwise. This commit almost reverts 896ff6d: It only leaves the added osmo_strlcpy() overflow check in place. Change-Id: I6c4ac6b0a0eef4842beae4107f6f09f6cd29172a Fixes: 896ff6db161465d506bb9bb5bee2cdeef220dd2e Related: OS#2673
* Properly deal with sockaddr_un socket path length limitations.Stefan Sperling2018-08-291-4/+11
| | | | | | | | | In osmo_sock_unix_init(), add support for non-NUL-terminated unix socket paths and return an error if the supplied socket path exceeds the maximum socket path length supported by the operating system. Change-Id: I19d935e5e3dd7928e6e153c6f5ad7044de726016 Related: OS#2673
* socket: add flag to enforce SO_REUSEADDR on UDP socketsPhilipp Maier2018-08-231-3/+3
| | | | | | | | | | | | | | | | | | | When IPPROTO_UDP is used then SO_REUSEADDR omitted since UDP is connection less we do not have to wait until lingering connections time out. There were also negative effects such as that two applicatications could use the same UDP port, normally one of the two applications would get an error, but with SO_REUSEADDR this is supressed. However, there are applications (UDP MULTICAST) where two applications must be able to use the same port. In the osmocom project those are osmo-bts-virtual, virtphy and gsmtap in general. Lets introduce a flag that the API user can supply in order to have SO_REUSEADDR applied. - Add new flag OSMO_SOCK_F_UDP_REUSEADDR Change-Id: I94aaf6d5224ab23bde5ea5c4a83569b6145ab32b Related: OS#3497
* socket: do not set SO_REUSEADDR for IPPROTO_UDPPhilipp Maier2018-08-021-25/+33
| | | | | | | | | | | | | When UDP is used as protocol (proto=IPPROTO_DUP), then we should not set SO_REUSEADDR in the socket option. Because if we do, we allow two processes to bind on the same UDP port. The errornous situation will be undetectable to both applications. So lets only set SO_REUSEADDR when we do not use UDP. - Add check if we use UDP, if yes do not set SO_REUSEADDR Change-Id: I4a8ffb8d598aca88801a4a0322944d7cdd8d4047 Related: OS#3441
* socket: check return code of setsockoptPhilipp Maier2018-08-021-1/+8
| | | | | | | | | | the return code of the last setsockopt() call in osmo_sock_init() is not checked. Since all other calls to setsockopt are checked, lets check this one as well. - check return code of setsockopt() and close the socket on failure Change-Id: I96dbccc3bcff35bf39979dbe0c44aadc8ce20c83
* fix strncpy bugs in socket.cNeels Hofmeyr2018-07-271-2/+1
| | | | Change-Id: Iddf36d26b23dcef4f9b291fd7ead1907e38c3486
* add osmo_sockaddr_to_str_and_uint()Neels Hofmeyr2018-07-201-0/+20
| | | | | | | | | This came from osmo-bsc refactoring patch I82e3f918295daa83274a4cf803f046979f284366 https://gerrit.osmocom.org/#/c/osmo-bsc/+/9671/6/src/osmo-bsc/gsm_data.c@1708 Add regression test in utils_test.c. Change-Id: I1f2918418c38918c5ac70acaa51a47adfca12b5e
* osmo_sockaddr_is_local: Fix memleakPau Espin Pedrol2018-04-181-1/+4
| | | | | | | | | | | | | | | Catched by AddressSanitizer in osmo-bts-trx while running tests in osmo-gsm-tester: ==31738==ERROR: LeakSanitizer: detected memory leaks Direct leak of 5744 byte(s) in 1 object(s) allocated from: #0 0x7ff7ec789ed0 in calloc (/usr/lib/x86_64-linux-gnu/libasan.so.3+0xc1ed0) #1 0x7ff7e952697c (/lib/x86_64-linux-gnu/libc.so.6+0x10297c) #2 0x7ff7e95274df in getifaddrs (/lib/x86_64-linux-gnu/libc.so.6+0x1034df) #3 0x7ff7eadcdc8f in osmo_sockaddr_is_local libosmocore/src/socket.c:537 Change-Id: I778d3c1f162abce0595e62670c29c5134bccd28d
* socket.c: osmo_sock_init: Several logic fixes and log improvementsPau Espin Pedrol2018-04-051-8/+16
| | | | | | See explanations in previous commit. Change-Id: I4889e777d8627fdfb52c97ab3ab353b6ed34aab2
* socket.c: osmo_sock_init2: connect: Several logic fixes and log improvementsPau Espin Pedrol2018-04-051-8/+17
| | | | | | See explanations in previous commits. Change-Id: Ib2f7577b9f498ae9d388ed1f79f6ca0ec6f09664
* socket.c: osmo_sock_init2: bind: Several logic fixes and log improvementsPau Espin Pedrol2018-04-051-7/+19
| | | | | | | | | | | | | | | | | | | | | | | After investigating osmo-msc showing this log message and looking at the code, it's a bit difficult to find out what's going on in the code: socket.c:224 unable to bind socket: (null):0: Protocol not supported The root cause was not yet found, but probably SCTP is not enabled in the kernel of the host running it. The cod eis most probably failing during socket() and not due to bind error as the log says, so let's print an error if socket() fails. Then, if setsockopt fails, we want to still keep trying in case an extra addr was offered by addrinfo_helper. It is definetly wrong to continue if setsockopt fails, because then we are skipping the bind(), which is a fundamental part of what osmo_sock_init2 does. Then, let's print the bind error when it really happens, and re-write the extra log at the end if we reach the point at which no suitable addr is found. Change-Id: I1854422ad92dadf33ed4d849e15c0380c3bf1626
* socket: use inet_ntop() instead of inet_ntoa() in osmo_sock_local_ip()Philipp Maier2018-01-221-2/+2
| | | | | | | | | | | | | | | The function inet_ntoa() stores its result in a static buffer and returns the pointer. When inet_ntoa() is called subsequently it overwrite the content of its static buffer with the new result. Since we osmo_sock_local_ip() is a library function we should use the more safe variant inet_ntop() in order to prevent unintentionally overwriting data that the caller might still need. Such an error would be hard to find. - Use the more safe inet_ntop() inestead of inet_ntoa() Change-Id: I9852b57736432032542bd96b6fdd4a2f08fc1f64
* socket: fix socket leak in osmo_sock_local_ip()Philipp Maier2018-01-221-0/+1
| | | | | | | | | The socket that is opend to probe the correct local ip-address is not closed when the test is done. - Close socket when it is not needed anymore Change-Id: I7f3562a344b58f6298d2068314be1626a96e1b1d
* Fix/Update copyright notices; Add SPDX annotationHarald Welte2017-11-131-0/+2
| | | | | | | | Let's fix some erroneous/accidential references to wrong license, update copyright information where applicable and introduce a SPDX-License-Identifier to all files. Change-Id: I39af26c6aaaf5c926966391f6565fc5936be21af
* socket: add function osmo_sock_local_ip() to query local ipPhilipp Maier2017-10-231-0/+53
| | | | | | | | | | In some cases it is required to know the ip-address of the interface through that a given remote IP-Address can be reached. Add function osmo_sock_local_ip() to determine the local ip-address for a given remote ip-address Change-Id: I2988cc52b196fc8476703d1287e24cb4a48491c2
* osmo_sock_init2(): Fix creation of non-bound socketsHarald Welte2017-07-211-1/+1
| | | | | | | | | If osmo_sock_init2() was used with CONNECT flag but without BIND flag, an invalid check for "did we create a socket yet" caused the socket to never be created, and subsequently the entire function to return an error. Change-Id: I0206dbb9c5b8f74d7fb088576941b092acd2ca22
* socket: Add new OSMO_SOCK_F_NO_MCAST_ALL optionHarald Welte2017-07-131-0/+10
| | | | | | | Using this option at socket creation, the caller can request disabling the IP_MULTICAST_ALL socket option. Change-Id: I5ab5de45c0b64ceb3636ea98245a23defa24ffd4
* socket: Allow disabling multicast loop on socket creationHarald Welte2017-07-131-4/+16
| | | | | | | | | | | This introduces a new flag OSMO_SOCK_F_NO_MCAST_LOOP, which can be used to disable the looping back of multicast packets transmitted throug this socket to other local sockets on the machine. As this looping-back is active by default, a single option to deviate from the default is deemed sufficient. Change-Id: I24a5b1ebc3f84d2d5d4734e54df50efaea26490b
* socket: Unify listen() calls and check for erroneous returnsHarald Welte2017-07-131-20/+33
| | | | | | | | | We had three places at the end of socket initialization functions calling listen(). Let's unify that and fix some bugs: * close + return error in case of bad listen() result * don't call listen() on AF_UNIX SOCK_DGRAM sockets Change-Id: I7e8dbe3c0486bb3b9810b0add1331e93fc106d82
* socket.c: Add multicast related convenience functionsHarald Welte2017-07-131-0/+135
| | | | Change-Id: Id703e7a7a1e065181a4c76c088b8dcc1b7fe15a2
* osmo_sock_get_name(): clearly indicate local and remoteNeels Hofmeyr2017-07-031-2/+2
| | | | | | | | | | | | | | | | In a string like 127.0.0.1:2905<->127.0.0.1:60661 it is hard to tell which is the local part. I'd have expected it on the left, but it is actually on the right. To avoid doubt and bypass bikesheds on which side should be what, clearly mark the two sides as remote and local. (r=127.0.0.1:2905<->l=127.0.0.1:60661) Change-Id: I43dcc6a1906429bd0955fd7fe2eb5b8495b592d8
* doxygen: unify use of \file across the boardNeels Hofmeyr2017-06-231-4/+3
| | | | | | | | | | | | | | | | | Considering the various styles and implications found in the sources, edit scores of files to follow the same API doc guidelines around the doxygen grouping and the \file tag. Many files now show a short description in the generated API doc that was so far only available as C comment. The guidelines and reasoning behind it is documented at https://osmocom.org/projects/cellular-infrastructure/wiki/Guidelines_for_API_documentation In some instances, remove file comments and add to the corresponding group instead, to be shared among several files (e.g. bitvec). Change-Id: Ifa70e77e90462b5eb2b0457c70fd25275910c72b
* doxygen: enable AUTOBRIEF, drop \briefNeels Hofmeyr2017-06-231-11/+11
| | | | | | | | | | Especially for short descriptions, it is annoying to have to type \brief for every single API doc. Drop all \brief and enable the AUTOBRIEF feature of doxygen, which always takes the first sentence of an API doc as the brief description. Change-Id: I11a8a821b065a128108641a2a63fb5a2b1916e87
* update/extend doxygen documentationHarald Welte2017-06-121-3/+2
| | | | | | | | | It's a pity that even with this patch we still are fare away from having the whole API documented. However, at least we have a more solid foundation. Updates not only extend the documentation, but also make sure it is rendered properly in the doxygen HTML. Change-Id: I1344bd1a6869fb00de7c1899a8db93bba9bafce3
* socket: Add osmo_sock_init2_ofd() functionPau Espin Pedrol2017-05-261-0/+23
| | | | | | Will be used by osmo-bts-trx Change-Id: I3c655a4af64fb80497a5aaa811cce8005dba9cd9
* Add osmo_sock_init2() function, allowing both BIND *and* CONNECTHarald Welte2017-04-091-33/+187
| | | | | | | | | The old osmo_sock_init() function allows only either a bind (for a server socket), or a connect (for a client socket), but not both together. So there's no way to have a client socket that is bound to a specific local IP and/or port, which is needed for some use cases. Change-Id: Idab124bcca47872f55311a82d6818aed590965e6
* cosmetic: replace fprintf with LOGPPhilipp Maier2017-02-091-8/+12
| | | | | | | socket.c still uses fprintf to output error messages. This commit replaces the fprintf with proper LOGP messages. Change-Id: Ia2993415d5f5c33ccd719af239ff59252d11b764
* socket: Introduce function to obtain socket nameHarald Welte2017-01-271-1/+43
| | | | | | | Using this function, one can obtain a human-readable string identifying the host and port names of the socket. Change-Id: Ib5de5c7b9effe1b0a363e4473a7be7fa38ca6ef3
* osmo_sock_init(): Fix memory leak in error pathHarald Welte2016-11-261-0/+1
| | | | | | | We forgot to call freeaddrinfo() in an error path. Change-Id: Iccbd3beef4c4a70dc443131b909c45e650d8c6a2 Fixes: Coverity CID 135217
* fix printf format for commit 'osmo_sock_init(): include host and port in ↵Neels Hofmeyr2016-08-291-1/+1
| | | | | | | error messages' Related: CID#143566 Change-Id: I75c542089749a0875d3d1913151fe838d7722ff2
* osmo_sock_init(): include host and port in error messagesNeels Hofmeyr2016-08-271-5/+16
| | | | | | | | | | | For programs like osmo-hnbgw with numerous sockets, the message that some unspecified connection was refused is not very helpful. Also output the host and port where an error occured. Instead of perror, use fprintf(stderr, ..., strerror()) to be able to include a format string and print host and port as passed to osmo_sock_init(). Change-Id: I8d0343f51310699b78fcb83fd76fd93764acf3dc
* Update doxygen annotations in libosmocoreHarald Welte2016-05-051-0/+6
| | | | | This adds and improves doxygen API descriptions all over libosmocore, reducing the 'white spots' that don't have any documentation.
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