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2010-12-17attr: add put function that allows to check buffer sizePablo Neira Ayuso
This patch adds a set of function that allows to check the size of the buffer. This is useful for attribute batching. This is strongly based on a patch from Jozsef. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-11-22attr: add mnl_attr_nest_cancel()Pablo Neira Ayuso
This patch adds mnl_attr_nest_cancel() that allows to cancel the current nest that we are building. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-11-19build: tag function headers rather than decls as exportedJan Engelhardt
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-11-19license: change licensing terms from GPLv2+ to LGPLv2.1+Pablo Neira Ayuso
Existing contributors ACK'ed the license change via email: * Jozsef Kadlecsik * Jan Engelhardt * Cristian Rodríguez Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-11-16attr: avoid multiple definition of hidden variableJan Engelhardt
When nesting two mnl_attr_for_each loops, the __len__ variable will be declared twice, eliciting a warning when -Wshadow is turned on. There can also be warnings in pre-C99 because declarations and code are mixed. Do without any temporaries that are not explicitly specified as macro parameters. Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
2010-11-11attr: remove redundant check for NULLJan Engelhardt
Calling mnl_attr_parse with cb==NULL is pointless, because the function will do nothing else. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-11-11nlmsg: use bool for mnl_nlmsg_ok()Jan Engelhardt
Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-10-25attr: rename str_null from NULL awayJan Engelhardt
A small little pedantism: NULL (as in, the pointer) isn't NUL (as in, the character with value zero, '\0'). I propose to rename it to strz, for the zero-terminated string (sometimes referred to as ASCIZ string, but of course C isn't tied to ASCII). Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-10-22attr: string functions should take char *Jan Engelhardt
I do not quite see the point of using strlen in conjunction with non-string data; so let's use char * as argument types to catch misuses. Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
2010-10-22doc: documentation updatesJan Engelhardt
Spelling, grammer, and synchronization of the readme. Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
2010-10-22src: remove redundant castsJan Engelhardt
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
2010-10-22src: add const qualifiersJan Engelhardt
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
2010-09-08doxygen documentationPablo Neira Ayuso
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-05-09relax mnl_attr_type_valid() checkings and change errno valuePablo Neira Ayuso
This patch relaxes strict attribute checkings in the example files. I have also changed the errno value, now it's EOPNOTSUPP instead of EINVAL. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-30add helpers to nest attributesPablo Neira Ayuso
Based on code from Jozsef Kadlecsik and its ipset-5 implementation. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-22review data types for input parameters of mnl_attr_*() functionsPablo Neira Ayuso
This patch includes the following changes: * use uint16_t for attribute types in mnl_attr_put_*() function * use uint16_t for maximun type in mnl_attr_type_valid(...) * use size_t for attribute size validation in mnl_attr_validate2(...) * use unsigned int for offset in mnl_attr_parse(...) instead of int Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-22fix mnl_attr_parse()Jozsef Kadlecsik
mnl_attr_parse does not take into account the length of the netlink message header and the offset. Thus when validating attributes, it goes over the end of the real attribute stream and catches invalid data areas. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org
2010-04-12remove mnl_nlmsg_get_len() functionPablo Neira Ayuso
Remove mnl_nlmsg_get_len() since it returns a field of a structure that is public (struct nlmsghdr). We can directly access the header fields and they are not likely to change in the future (at least for this version of Netlink I think). Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-12review documentation on netlink attribute helpersPablo Neira Ayuso
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-05more consistency name issues: rename get_data*() to get_payload*()Pablo Neira Ayuso
This includes renaming get_tail() to get_payload_tail() Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-05xPablo Neira Ayuso
2010-04-05rename mnl_attr_type_ok() by mnl_attr_type_valid() for consistencyPablo Neira Ayuso
better to rename this function since its return value is not similar to other _ok() functions, for consistency. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-05fix warning in compilation due to different signessPablo Neira Ayuso
msg.c: In function ‘mnl_nlmsg_ok’: msg.c:136: warning: comparison between signed and unsigned msg.c:138: warning: comparison between signed and unsigned attr.c: In function ‘mnl_attr_ok’: attr.c:79: warning: comparison between signed and unsigned Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-04remove bogus checking in mnl_attr_validate() and mnl_attr_validate2()Pablo Neira Ayuso
attr.c: In function ‘mnl_attr_validate’: attr.c:189: warning: comparison of unsigned expression < 0 is always false attr.c: In function ‘mnl_attr_validate2’: attr.c:210: warning: comparison of unsigned expression < 0 is always false Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-04rename mnl_attr_type_invalid() by mnl_attr_type_ok()Pablo Neira Ayuso
And include the prototype in libmnl.h, since it was missing Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-04remove mnl_align() as it's been replaced by MNL_ALIGN()Pablo Neira Ayuso
We remove mnl_align() since it has been replaced by the macro MNL_ALIGN(). The macro allows its use in static arrays and such. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-03add validation infrastructure and rework attribute parsingPablo Neira Ayuso
This patch includes the new validation infrastructure which is decoupled from the attribute parsing. It is composed of: - mnl_attr_type_invalid: that allows to check if the attribute type is valid (ie. the type is not higher than WXYZ_MAX). - mnl_attr_validate: that allows to validate that there's enough room for the attribute data. The patch includes the rework of the attribute parsers. Now, you don't have to use an array of pointer to store the result of the parsing, you can use whatever data structure instead. The prototype as it follows: typedef int (*mnl_attr_cb_t)(const struct nlattr *attr, void *data); extern int mnl_attr_parse(const struct nlmsghdr *nlh, int offset, mnl_attr_cb_t cb, void *data) There are three versions of rtnl-link-dump.c that show how attribute parsing can be done now. Probably that many examples are not good idea, I may remove some of them from the tree in the future. This patch also merges mnl_attr_parse_at_offset into mnl_attr_parse. This patch modifies MNL_ALIGN so that we can use it in static arrays (the use of mnl_align() is not allowed in compilation time to initialize an array field). I have added the mnl_attr_for_each() macro and I have changed mnl_attr_for_each_nested() to declare the length variable internally. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-04-03use C99 types uintXX_t instead of POSIX u_intXX_tPablo Neira Ayuso
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-03-26add COPYING filePablo Neira Ayuso
This library is distributed under GPLv2+. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2010-03-22finish API documentationPablo Neira Ayuso
This patch may contain errors but we can review them and fix them later, better to have it in the tree (to allow others to contribute) to keep it in my local tree.
2010-03-19initial libmnl importPablo Neira Ayuso
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