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Most table handlers do not expect to be given an OID whose prefix is
outside what they can handle. This is not a problem with the SMUX
implementation since it always correct the OID such that the prefix
matches. However, this is not the case for the AgentX
implementation. A new function, smux_header_table() is used to do this
normalization.
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smux_trap() signature has been changed to provide appropriate level
information to send SNMPv2 notifications. This includes the addition
of the enterprise OID to use (from which is derived the SNMP trap OID)
and the MIB registry to locate the appropriate function for variable
bindings provided by the trap.
The SMUX implementation has been updated but ignore the provided
enterprise OID. Instead, it still uses the SMUX peer OID to keep
compatibility with previous versions of Quagga. The SMUX
implementation also ignores the provided MIB registry since it uses
smux_get() function to grab the appropriate values. This is not
possible with the AgentX implementation since there is no such
function provided by NetSNMP.
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This element was not unused.
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smux_trap() contains an argument whose use appears to be to set
sysUpTime.0/timestamp field in SNMP trap. However, this value is not
used in smux_trap(). Moreover, it is expected that this field is the
value of sysUpTime.0 when the trap was sent and not any other time
related to the trap. To avoid any confusion, we remove this field from
the signature of the function.
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lib/snmp.c gets OID related helper functions that can be used with
another SNMP interface. smux.h is cleaned of SMUX specific bits to
only expose functions that may be used by an alternative
implementation. We also do not redefine functions already present in
NetSNMP. Just use the appropriate headers.
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smux_trap and oid_copy should allow read-only source.
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Macro SNMP_INTEGER() prepares data which is eventually processed
by asn_build_int(). SNMP_INTEGER() was using "int32_t" whereas
asn_build_int() uses "long". On 32-bit systems these are the
same, both 4 bytes, but on x86 64-bit systems "long" is 8 bytes.
asn_build_int()'s reaction to an improperly sized value is to return
a NULL pointer. Quagga's smux.c would eventually get this NULL
pointer and use it in calculations to determine how much data to send
over the smux connection, resulting in garbage being sent to the
SNMP agent.
Corrected SNMP_INTEGER() to use "long".
Tested on 32-bit and 64-bit x86 Linux 2.6.27.10 systems running
Quagga 0.99.11 with bgpd smux.
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* lib/smux.[ch]: allow to retreive global OID (identified by <0
namelen).
* ospf_ism.c: generate SNMP traps on Interface state change
* ospf_nsm.c: generate SNMP traps on Neighbour state change
* ospf_snmp.[ch]: support for SNMP traps for interface and neighbours.
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* (general) extern and static'ification of functions in code and
header.
Cleanup any definitions with unspecified arguments.
Add casts for callback assignments where the callback is defined,
typically, as passing void *, but the function being assigned has
some other pointer type defined as its argument, as gcc complains
about casts from void * to X* via function arguments.
Fix some old K&R style function argument definitions.
Add noreturn gcc attribute to some functions, as appropriate.
Add unused gcc attribute to some functions (eg ones meant to help
while debugging)
Add guard defines to headers which were missing them.
* command.c: (install_node) add const qualifier, still doesnt shut
up the warning though, because of the double pointer.
(cmp_node) ditto
* keychain.c: (key_str2time) Add GET_LONG_RANGE() macro, derived
fromn vty.h ones to fix some of the (long) < 0 warnings.
* thread.c: (various) use thread_empty
(cpu_record_hash_key) should cast to uintptr_t, a stdint.h type
* vty.h: Add VTY_GET_IPV4_ADDRESS and VTY_GET_IPV4_PREFIX so they
removed from ospfd/ospf_vty.h
* zebra.h: Move definition of ZEBRA_PORT to here, to remove
dependence of lib on zebra/zserv.h
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initializes connection, and "no smux peer" command terminates it. Fixes
bugzilla #47 and #112.
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* if.h: mtu's should be unsigned.
* routemap.{c,h}: const char updates
* smux.{c,h}: ditto
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* Fix lib/smux.c's reliance on daemons exporting struct
thread_master *master.
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