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* flower: use correct attribute when filling out flagsVolodymyr Bendiuga2022-05-191-1/+1
| | | | | | | | Signed-off-by: Volodymyr Bendiuga <volodymyr.bendiuga@westermo.com> Fixes: ef46de143206 ('route/cls: add flower classifier') https://github.com/thom311/libnl/pull/316
* route: fix crash caused by parse_multipath() by wrong free()Thomas Haller2022-05-031-1/+1
| | | | | | https://bugzilla.redhat.com/show_bug.cgi?id=2081279 Fixes: b50be8fa869b ('rtnl/route: use cleanup attribute in "lib/route/route_obj.c"')
* route/link: Set the cache ops when cloning a linkJacques de Laval2022-04-261-0/+3
| | | | | | | | | The cache ops needs to be included in a cloned link for link methods to work as expected. Signed-off-by: Jacques de Laval <Jacques.De.Laval@westermo.com> https://github.com/thom311/libnl/pull/311
* route/link: add lock around rtnl_link_af_ops_put()Thomas Haller2022-04-261-1/+4
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* route/link: avoid accessing af_ops after af_free() in rtnl_link_set_family()Thomas Haller2022-04-261-3/+4
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* route: fix check for NULL in nh_encap_dump()Thomas Haller2022-04-221-1/+4
| | | | | | | | | | | Error: REVERSE_INULL (CWE-476): libnl-3.6.0/lib/route/nexthop_encap.c:35: deref_ptr: Directly dereferencing pointer "rtnh_encap->ops". libnl-3.6.0/lib/route/nexthop_encap.c:37: check_after_deref: Null-checking "rtnh_encap->ops" suggests that it may be null, but it has already been dereferenced on all paths leading to the check. # 35| nh_encap_type2str(rtnh_encap->ops->encap_type)); # 36|··· # 37|-> if (rtnh_encap->ops && rtnh_encap->ops->dump) # 38| rtnh_encap->ops->dump(rtnh_encap->priv, dp); # 39| }
* route/qdisc/mqprio: fix bufferoverflow and argument checking in ↵Thomas Haller2022-04-221-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rtnl_qdisc_mqprio_set_*() rtnl_qdisc_mqprio_set_priomap() would access the input array prio after len. Also these setters did the wrong argument checking (arguably, the caller is not supposed to provide an invalid argument, so that part is less severe). Coverity: Error: OVERRUN (CWE-119): libnl-3.6.0/lib/route/qdisc/mqprio.c:363: cond_at_most: Checking "len / 2UL > 16UL" implies that "len" may be up to 33 on the false branch. libnl-3.6.0/lib/route/qdisc/mqprio.c:366: overrun-buffer-arg: Overrunning array "mqprio->qm_count" of 32 bytes by passing it to a function which accesses it at byte offset 65 using argument "len * 2UL" (which evaluates to 66). [Note: The source code implementation of the function has been overridden by a builtin model.] # 364| return -NLE_RANGE; # 365|··· # 366|-> memcpy(mqprio->qm_count, count, len * sizeof(uint16_t)); # 367| memcpy(mqprio->qm_offset, offset, len * sizeof(uint16_t)); # 368| mqprio->qm_mask |= SCH_MQPRIO_ATTR_QUEUE; Error: OVERRUN (CWE-119): libnl-3.6.0/lib/route/qdisc/mqprio.c:363: cond_at_most: Checking "len / 2UL > 16UL" implies that "len" may be up to 33 on the false branch. libnl-3.6.0/lib/route/qdisc/mqprio.c:367: overrun-buffer-arg: Overrunning array "mqprio->qm_offset" of 32 bytes by passing it to a function which accesses it at byte offset 65 using argument "len * 2UL" (which evaluates to 66). [Note: The source code implementation of the function has been overridden by a builtin model.] # 365|··· # 366| memcpy(mqprio->qm_count, count, len * sizeof(uint16_t)); # 367|-> memcpy(mqprio->qm_offset, offset, len * sizeof(uint16_t)); # 368| mqprio->qm_mask |= SCH_MQPRIO_ATTR_QUEUE; # 369|··· Error: OVERRUN (CWE-119): libnl-3.6.0/lib/route/qdisc/mqprio.c:496: cond_at_most: Checking "len / 8UL > 16UL" implies that "len" may be up to 135 on the false branch. libnl-3.6.0/lib/route/qdisc/mqprio.c:499: overrun-buffer-arg: Overrunning array "mqprio->qm_min_rate" of 128 bytes by passing it to a function which accesses it at byte offset 1079 using argument "len * 8UL" (which evaluates to 1080). [Note: The source code implementation of the function has been overridden by a builtin model.] # 497| return -NLE_RANGE; # 498|··· # 499|-> memcpy(mqprio->qm_min_rate, min, len * sizeof(uint64_t)); # 500| mqprio->qm_mask |= SCH_MQPRIO_ATTR_MIN_RATE; # 501|··· Error: OVERRUN (CWE-119): libnl-3.6.0/lib/route/qdisc/mqprio.c:545: cond_at_most: Checking "len / 8UL > 16UL" implies that "len" may be up to 135 on the false branch. libnl-3.6.0/lib/route/qdisc/mqprio.c:548: overrun-buffer-arg: Overrunning array "mqprio->qm_max_rate" of 128 bytes by passing it to a function which accesses it at byte offset 1079 using argument "len * 8UL" (which evaluates to 1080). [Note: The source code implementation of the function has been overridden by a builtin model.] # 546| return -NLE_RANGE; # 547|··· # 548|-> memcpy(mqprio->qm_max_rate, max, len * sizeof(uint64_t)); # 549| mqprio->qm_mask |= SCH_MQPRIO_ATTR_MAX_RATE; # 550|··· Fixes: 25cf1d39eded ('route:qdisc: add MQPRIO Qdisc'
* route/sriov: fix buffer overflow in rtnl_link_sriov_parse_vflist()Thomas Haller2022-04-221-1/+1
| | | | | | | | | | | | | | Coverity: Error: OVERRUN (CWE-119): libnl-3.6.0/lib/route/link/sriov.c:653: overrun-buffer-arg: Overrunning array "stb" of 6 8-byte elements by passing it to a function which accesses it at element index 8 (byte offset 71) u # 651|··· # 652| if (t[IFLA_VF_STATS]) { # 653|-> err = nla_parse_nested(stb, IFLA_VF_STATS_MAX, # 654| t[IFLA_VF_STATS], # 655| sriov_stats_policy); Fixes: 5d6e43ebef12 ('lib/route: SRIOV Parse and Read support')
* all: fix "-Wformat" warnings for nl_dump*()Thomas Haller2022-04-2212-203/+183
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* route/link/sriov: fix initializing vlans in rtnl_link_sriov_clone()Thomas Haller2022-04-221-1/+1
| | | | | | | | | | | | | Error: SIZEOF_MISMATCH (CWE-398): libnl-3.6.0/lib/route/link/sriov.c:125: suspicious_sizeof: Passing argument "dst_vlan_info" of type "nl_vf_vlan_info_t *" and argument "dst_vlans->size * 8UL /* sizeof (dst_vlan_info) */" libnl-3.6.0/lib/route/link/sriov.c:125: remediation: Did you intend to use "sizeof (*dst_vlan_info)" instead of "sizeof (dst_vlan_info)"? # 123| dst_vlan_info = dst_vlans->vlans; # 124| memcpy(dst_vlans, src_vlans, sizeof(nl_vf_vlans_t)); # 125|-> memcpy(dst_vlan_info, src_vlan_info, # 126| dst_vlans->size * sizeof(dst_vlan_info)); # 127| d_vf->vf_vlans = dst_vlans; Fixes: a59cab6d0b0f ('lib/route: SRIOV Clone Support')
* route/qdisc/netem: fix bogus "%" in format string netem_dump_details()Thomas Haller2022-04-221-9/+9
| | | | | | | | | | | | | This was wrong. Also, coverity warns about the trailing % in the format string. Error: PRINTF_ARGS (CWE-475): libnl-3.6.0/lib/route/qdisc/netem.c:164: format_error: Format string ended in the middle of specifier "%". # 162|··· # 163| if (netem->qnm_mask & SCH_NETEM_ATTR_DELAY_CORR && netem->qnm_corr.nmc_delay > 0) # 164|-> nl_dump(p, " %d%", netem->qnm_corr.nmc_delay); # 165| } # 166| }
* route/u32: fix u32_dump_details() to print dataThomas Haller2022-04-221-5/+0
| | | | | | | | | | | | | | | The if statement was wrong and always true. Drop it, the remaining code handles the cases of no flags already correctly. Error: DEADCODE (CWE-561): libnl-3.6.0/lib/route/cls/u32.c:361: dead_error_condition: The condition "!(u->cu_mask & 0)" must be true. libnl-3.6.0/lib/route/cls/u32.c:366: dead_error_line: Execution cannot reach this statement: "if (!(u->cu_mask & 0x20)) {...". # 364| } # 365|··· # 366|-> if (!(u->cu_mask & U32_ATTR_SELECTOR)) { # 367| nl_dump(p, "no-selector"); # 368| } else {
* link/vrf: avoid coverity warning in rtnl_link_vrf_set_tableid() about ↵Thomas Haller2022-04-221-2/+2
| | | | | | | | | | | | CONSTANT_EXPRESSION_RESULT Error: CONSTANT_EXPRESSION_RESULT (CWE-569): libnl-3.6.0/lib/route/link/vrf.c:237: result_independent_of_operands: "id > RT_TABLE_MAX" is always false regardless of the values of its operands. This occurs as the logical operand of "i # 235|··· # 236| IS_VRF_LINK_ASSERT(link); # 237|-> if(id > VRF_TABLE_ID_MAX) # 238| return -NLE_INVAL; # 239|···
* route/ip6vti,ip6gre: fix printing invalid data in ip6{vti,gre}_dump_details()Thomas Haller2022-04-222-18/+12
| | | | | | | | | | | | Coverity doesn't like this: libnl-3.6.0/lib/route/link/ip6vti.c:209: invalid_type: Argument "ip6vti->remote" to format specifier "%#x" was expected to have type "unsigned int" but has type "struct in6_addr". libnl-3.6.0/lib/route/link/ip6vti.c:201: invalid_type: Argument "ip6vti->local" to format specifier "%#x" was expected to have type "unsigned int" but has type "struct in6_addr". libnl-3.6.0/lib/route/link/ip6gre.c:285: invalid_type: Argument "ip6gre->remote" to format specifier "%#x" was expected to have type "unsigned int" but has type "struct in6_addr". libnl-3.6.0/lib/route/link/ip6gre.c:277: invalid_type: Argument "ip6gre->local" to format specifier "%#x" was expected to have type "unsigned int" but has type "struct in6_addr". Coverity is right. But in practice, this code was unreachable because there is no scenario when inet_ntop() will fail.
* route/link: workaround coverity warning about leak in rtnl_link_set_type()Thomas Haller2022-04-221-2/+3
| | | | | | | | | | | | | I think the following warning is bogus. Still, warnings are annoying, so let's try to workaround. Error: CLANG_WARNING: [#def47] libnl-3.6.0/lib/route/link.c:2566:11: warning[unix.Malloc]: Potential leak of memory pointed to by 'kind' # 2564| if ( io->io_alloc # 2565| && (err = io->io_alloc(link)) < 0) # 2566|-> return err; # 2567| # 2568| link->l_info_ops = io;
* all: avoid coverity warnings about assigning variable but not using itThomas Haller2022-04-2216-47/+26
| | | | | | | | | | | | Workaround coverity warnings like: Error: CLANG_WARNING: libnl-3.6.0/lib/netfilter/exp.c:428:7: warning[deadcode.DeadStores]: Although the value stored to 'err' is used in the enclosing expression, the value is never actually read from 'err' # 426| } # 427|··· # 428|-> if ((err = nfnl_exp_build_tuple(msg, exp, CTA_EXPECT_NAT)) < 0) # 429| goto nla_put_failure; # 430|···
* route/mdb: check parser error in mdb_msg_parser() for nested MDBA_MDB attributeThomas Haller2022-04-221-2/+4
| | | | | | Coverity says: libnl-3.6.0/lib/route/mdb.c:198: check_return: Calling "nla_parse_nested" without checking return value (as is done elsewhere 43 out of 44 times).
* route/mdb: add and use rtnl_mdb_entry_free() internal helper methodThomas Haller2022-04-221-6/+12
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* route/mdb: fix leak in mdb_msg_parser()Thomas Haller2022-04-221-32/+28
| | | | | | Found by coverity: libnl-3.6.0/lib/route/mdb.c:242: leaked_storage: Variable "entry" going out of scope leaks the storage it points to.
* route/mdb: fix buffer overflow in mdb_msg_parser()Thomas Haller2022-04-221-1/+1
| | | | | | | | Found by coverity: 4. libnl-3.6.0/lib/route/mdb.c:198: overrun-buffer-arg: Overrunning array "db_attr" of 1 8-byte elements by passing it to a function which accesses it at element index 1 (byte offset 15) using argument "1". Fixes: 0ec6c6c2f023 ('mdb: support bridge multicast database notification')
* route/mdb: add support for MAC multicast entriesJoachim Wiberg2022-03-301-0/+5
| | | | | | | | | | | | | | | | The kernel bridge now support (permanent) forwarding of MAC multicast using the MDB. Internally the kernel use AF_UNSPEC, but we remap this here to AF_LLC for the benefit for nl_addrs. To test, put `nl-monitor mdb` in the background. Then, with a bridge and at least one port, run the following command: # nl-monitor mdb & # bridge mdb add dev br0 port eth0 grp 01:02:03:c0:ff:ee vid 1 permanent dev 9 port 3 vid 1 proto 0x0000 address 01:02:03:c0:ff:ee Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
* route/mdb: add missing detils and stats dump callbacksJoachim Wiberg2022-03-301-2/+14
| | | | | | | | When using, e.g., nl-monitor to debug the bridge mdb the nl-monitor tool did not dump anything. This change adds the missing stats dump callback to rectify this issue, and also the details callback for completeness. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
* Check validation type against end of enumjauge-technica2022-03-281-1/+1
| | | | | | | | The enum macsec_validation_type in the Linux Kernel has values 0-2. With the existing check >1, value STRICT (2) cannot be set. The check should be done against the end marker of the enum instead. https://github.com/thom311/libnl/pull/304
* route/link: add VLAN bridge binding flagJoachim Wiberg2022-03-281-0/+1
| | | | | | | | | | | | Adds support for the new VLAN_FLAG_BRIDGE_BINDING, for VLAN interfaces created on top of a VLAN aware bridge. For details, see the kernel patch: https://lore.kernel.org/netdev/20190418173535.22925-1-mmanning@vyatta.att-mail.com/ Signed-off-by: Joachim Wiberg <troglobit@gmail.com> https://github.com/thom311/libnl/pull/303
* route: assert that "rtnl_link_info_ops" refcount does not drop below zeroThomas Haller2022-03-161-0/+2
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* lib: make nl_object_clone() out-of-memory safeThomas Haller2022-03-167-12/+50
| | | | | | | | | | | | | | | | | nl_object_clone() first does a shallow copy using memcpy(). That is useful, because it can correctly copy simple fields (like numbers). For pointer values, we need to implement oo_clone() to fixup the pointers and get the deep-copy correct. Now, oo_clone() must always follow through, to un-alias the copied pointer. In particular also in the error case. The oo_clone() implementations sometimes fail (with ENOMEM) and just return. In those cases, we must make sure that we don't leave the wrong pointers there. The pointers must be cleared first. Otherwise, any failure (which basically are ENOMEM) leave the object in an inconsistent state, and we double-free/use-after-free the pointers.
* route: fix ref counting for l_info_ops and io_clone()Thomas Haller2022-03-161-4/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | nl_object_clone() first does a shallow copy, before calling oo_clone() (link_clone()). That means, the pointer values of the link object in link_clone() are invalid (as they alias the pointers from the source object). We need to get the ref-counting for dst->l_info_ops right. It was not. For example, previously when we called io_clone() handler, dst->l_info_ops would still point to the one from src->l_info_ops, but without owning the additional reference. Then we call io_clone(), for example can_clone() for can devices. That one calls first rtnl_link_set_type(), which first calls release_link_info() -- and unrefs the ops, without having owned a reference. Fix that, by getting the reference counting right, before calling io_clone(). Arguably, we now do duplicate work. First taking a ref, then calling rtnl_link_set_type() which releases and retakes the ref. But at least, this way it's correct. This probably did not cause issues before, because the entire ref-counting is mostly useless anyway. It's only used for asserting during rtnl_link_unregister_info() -- and then it checks that the ref count is not positive (but we release too many references, not too few). Anyway. *sigh*.
* route: drop unnecessary oo_clone() implementation from netconfThomas Haller2022-03-161-11/+0
| | | | | | If the object has no complex data (pointers!), then the base implementation using memcpy() is enough. No need to implement oo_clone().
* lib: add rtnl_link_info_ops_get() and take lock for rtnl_link_info_ops's ↵Thomas Haller2022-03-161-2/+20
| | | | io_refcnt
* route/cls: add TCA_FLOWER_KEY_VLAN_ETH_TYPE to "flower_policy" policyThomas Haller2022-03-151-10/+11
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* route/cls: return -NLE_INVAL in case rtnl_tc_data_peek() failsThomas Haller2022-03-151-6/+6
| | | | | | The problem here is not really NOMEM (because rtnl_tc_data_peek() wouldn't allocate new memory. The problem is, that the cls instance has no such data field. Return -NLE_INVAL instead.
* route/cls: no need to copy simple fields in flower_clone()Thomas Haller2022-03-151-12/+0
| | | | | | nl_object_clone() already does a shallow clone using memcpy(). So all simple fields are already initialized. We only need the oo_clone() implementation to get the deep-copy right.
* route/cls: make output pointers in rtnl_flower_get_{src,dst}_mac() optionalThomas Haller2022-03-151-5/+7
| | | | | | | | | | | | | | | We often require that a valid output pointer is passed to the getters. But here, let's be forgiving. Being more forgiving may be inconsistent, but on the safe side: the user is still welcome to assume they must provide a valid output pointer. Also, we always need to initialize the output mask, not only with `f->cf_mask & FLOWER_ATTR_DST_MAC_MASK`. The reason is that the caller cannot know whether the mask is present, so conditionally initializing the output is error prone (it requires the caller to NUL initialize first). Also, "f->cf_dst_mac_mask" really should be zero initialized, if the mask indicates that it's unset. This means, we can just always memcpy the mask.
* route/cls: adjust whitspace/indentationThomas Haller2022-03-151-142/+142
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* route/cls: use SPDX-License-IdentifierThomas Haller2022-03-151-7/+1
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* route/cls: add flower classifierVolodymyr Bendiuga2022-03-151-0/+731
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a subset of functions. Implemented api: rtnl_flower_set_proto; rtnl_flower_get_proto; rtnl_flower_set_vlan_id; rtnl_flower_get_vlan_id; rtnl_flower_set_vlan_prio; rtnl_flower_get_vlan_prio; rtnl_flower_set_vlan_ethtype; rtnl_flower_set_dst_mac; rtnl_flower_get_dst_mac; rtnl_flower_set_src_mac; rtnl_flower_get_src_mac; rtnl_flower_set_ip_dscp; rtnl_flower_get_ip_dscp; rtnl_flower_set_flags; rtnl_flower_append_action; rtnl_flower_del_action; rtnl_flower_get_action; [thaller@redhat.com: squashed commit "route:cls:flower: use parentheses in macro definitions"] [thaller@redhat.com: squashed commit "cls:flower: add TCA_FLOWER_FLAGS to flower_policy"] [thaller@redhat.com: squashed commit "cls:flower: vlan priority is uint8_t, not uint16_t"] [thaller@redhat.com: squashed commit "route:cls:flower: substitute nl_data* with uint8_t mac[ETH_ALEN]"] [thaller@redhat.com: drop non-existing TCA_FLOWER_POLICE. That was never merged to upstream kernel. While at it, use decimal numbers for the bitshift.] [thaller@redhat.com: fix build by including <linux/if_ether.h> in "types.h".] Signed-off-by: Volodymyr Bendiuga <volodymyr.bendiuga@westermo.se>
* route: make argument of rtnl_link_can_set_{bittiming,data_bittiming}() constThomas Haller2022-03-151-2/+2
| | | | | | The argument of the setters does not get modified. Make it const. This change does not break API/ABI.
* route: add rtnl_link_can_set_data_bittiming_const()Thomas Haller2022-03-151-0/+22
| | | | | In can_put_attrs(), we also put ci_data_bittiming_const. It is thus necessary to be able to set it.
* route: drop bitrate,sample-point getters/setters from can linkThomas Haller2022-03-151-84/+0
| | | | | | | | | | | | | | These accessor functions just get/set a field of ci_data_bittiming, which can already be get/set as a whole. It seems redundant, so drop it. It's really important that things are principle at all (like, setting ci_data_bittiming). It's not clear that we need such convenience functions, if you can achieve the same result otherwise. Yes, we have similar accessors already. I think that is not a good approach though. If they turn out very useful, we can still revert this patch.
* route: rename rtnl_link_can_get_data_bt_const() to ↵Thomas Haller2022-03-151-2/+2
| | | | | | rtnl_link_can_get_data_bittiming_const() It seems more consistent with the other names.
* route: fix indentationThomas Haller2022-03-151-25/+26
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* route/link: add CAN FD supportAnders Piniesjö2022-03-151-15/+199
| | | | | | | Add CAN FD support analog to the normal CAN support. [thaller@redhat.com: second part of original commit. The first part was merged as commit 5d925168a459]
* route/mdb: drop setting ifindex in mdb_clone()Thomas Haller2022-03-141-3/+0
| | | | | | | The default implementation of oo_clone() already clones the object using memcpy(). So simple fields (like ifindex) are correct. What is not correct (and for what we need the oo_clone() implementation) are pointer values which require a deep clone.
* route/mdb: minor cleanup in "mdb.c"Thomas Haller2022-03-141-34/+31
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* route/mdb: drop extra MDB attributes and rework mdb_compare()Thomas Haller2022-03-141-26/+25
| | | | | | | | | | | | | | | | | | - a `struct rtnl_mdb` has a list of `struct rtnl_mdb_entry`. An attribute like MDB_ATTR_PORT is not really an attribute of the MDB struct, but rather of one entry. It makes no sense to mangle these. Having MDB_ATTR_PORT set in the change flags would mean that at least one entry has the port set. Instead, add MDB_ATTR_ENTRIES which is about the list of entries. - drop unused `ce_mask` in `struct rtnl_mdb_entry`. - rework mdb_compare(). When we compare the two lists of entries, it's not right to have two nested loops. You can either iterate both lists in step, and compare each element to do a comparison that honors the order of the elements. Or, you can compare the two lists accepting any order. The latter is more complicated, and does not seem right. So do the former.
* route/mdb: hide rtnl_mdb_entry_alloc() from public APIThomas Haller2022-03-141-1/+3
| | | | | | | | | | | "struct rtnl_mdb_entry" is a relatively simple object that keeps a few data fields. But there are no public setters in the API, so it's not useful to be able to allocate such an entry. Hide from public API. Also, it was already not listed in libnl-route-3.sym, and thus the symbol was hidden anyway.
* route/mdb: use nl_list_for_each_entry_safe() for destroying list in ↵Thomas Haller2022-03-141-8/+6
| | | | | | | | | mdb_free_data() I think this was wrong before. We cannot use mdb_free_data() and free the current element. Use nl_list_for_each_entry_safe() and properly unlink the element.
* mdb: support bridge multicast database notificationRubens Figueiredo2022-03-141-0/+451
| | | | | | | | | | | The Linux kernel has a notification system via Netlink that reports the changes in the multicast database over the RTNLGRP_MDB multicast socket. As such notifications such as RTM_NEWMDB, RTM_GETMDB can be processed in userspace. libnl must support the capability of processing these messages, e.g. RTM_GETMDB. This commit adds a new rtnl_mdb object as well as a route/mdb cache, in order to expose the contents of the multicast database.
* route/cls: rename rtnl_cls_get{,_by_prio}() API to ↵Thomas Haller2022-03-141-4/+4
| | | | | | | rtnl_cls_find_by{handle,prio}() The functions return the first matching object (of potentially several). Rename them to "find", so that this is a bit clearer.
* route/cls: allow fetching of classifiers from cacheVolodymyr Bendiuga2022-03-141-0/+72
| | | | | | | | API: rtnl_cls_get() rtnl_cls_get_by_prio() These functions search for classifiers in classifier cache.
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