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zebra: Ensure SRv6 SID length does not exceed 128
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>
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@ -311,6 +311,13 @@ DEFPY (locator_prefix,
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}
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}
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if (prefix->prefixlen + func_bit_len + 0 > 128) {
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vty_out(vty,
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"%% prefix-len + function-len + arg-len (%ld) cannot be greater than 128\n",
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prefix->prefixlen + func_bit_len + 0);
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return CMD_WARNING_CONFIG_FAILED;
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}
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locator->block_bits_length = block_bit_len;
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locator->node_bits_length = node_bit_len;
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locator->function_bits_length = func_bit_len;
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