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Babel: Add MAC authentication support - update

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Some cleanups and bugfixes to the previous patch, including:

 - Fix rate limiting in index mismatch check

 - Fix missing BABEL_AUTH_INDEX_LEN in auth_tx_overhead computation

 - Fix missing auth_tx_overhead recalculation during reconfiguration

 - Fix pseudoheader construction in babel_auth_sign() (sport vs fport)

 - Fix typecasts for ptrdiffs in log messages

 - Make auth log messages similar to corresponding RIP/OSPF ones

 - Change auth log messages for events that happen during regular
   operation to debug messages

 - Switch meaning of babel_auth_check*() functions for consistency
   with corresponding RIP/OSPF ones

 - Remove requirement for min/max key length, only those required by
   given MAC code are enforced
This commit is contained in:
Ondrej Zajicek (work)
2021-06-06 15:22:59 +02:00
parent b218a28f61
commit b174cc0abc
5 changed files with 205 additions and 198 deletions
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7
proto/babel/babel.h
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@@ -61,8 +61,9 @@
#define BABEL_OVERHEAD (IP6_HEADER_LENGTH+UDP_HEADER_LENGTH)
#define BABEL_MIN_MTU (512 + BABEL_OVERHEAD)
#define BABEL_AUTH_NONE 0
#define BABEL_AUTH_NONE 0
#define BABEL_AUTH_MAC 1
#define BABEL_AUTH_NONCE_LEN 10 /* we send 80 bit nonces */
#define BABEL_AUTH_MAX_NONCE_LEN 192 /* max allowed by spec */
#define BABEL_AUTH_INDEX_LEN 32 /* max size in spec */
@@ -82,9 +83,9 @@ enum babel_tlv_type {
BABEL_TLV_UPDATE = 8,
BABEL_TLV_ROUTE_REQUEST = 9,
BABEL_TLV_SEQNO_REQUEST = 10,
BABEL_TLV_MAC = 16,
BABEL_TLV_MAC = 16,
BABEL_TLV_PC = 17,
BABEL_TLV_CHALLENGE_REQ = 18,
BABEL_TLV_CHALLENGE_REQUEST = 18,
BABEL_TLV_CHALLENGE_REPLY = 19,
BABEL_TLV_MAX
};