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zebra: Ensure SRv6 SID length does not exceed 128

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According to RFC 8986, the SRv6 SID length cannot exceed 128 bits. This
commit ensures that the condition
`block_len + node_len + function_len + arg_len <= 128` is satisfied when
a new SRv6 locator is created.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2022-08-23 16:20:07 +02:00
parent b3c5e11c8d
commit 34e3711fb4
1 changed files with 7 additions and 0 deletions
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7
zebra/zebra_srv6_vty.c
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@ -311,6 +311,13 @@ DEFPY (locator_prefix,
}
}
if (prefix->prefixlen + func_bit_len + 0 > 128) {
vty_out(vty,
"%% prefix-len + function-len + arg-len (%ld) cannot be greater than 128\n",
prefix->prefixlen + func_bit_len + 0);
return CMD_WARNING_CONFIG_FAILED;
}
locator->block_bits_length = block_bit_len;
locator->node_bits_length = node_bit_len;
locator->function_bits_length = func_bit_len;