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isisd: Add unpack func for SID Struct Sub-Sub-TLV

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Add a function to unpack an SRv6 SID Structure Sub-Sub-TLV
(RFC 9352 section #9).

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2023-02-14 16:24:56 +01:00
parent 8953be7a0c
commit 5579ca40ef
1 changed files with 27 additions and 0 deletions
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27
isisd/isis_tlvs.c
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@ -2035,6 +2035,33 @@ static int pack_subsubtlv_srv6_sid_structure(
return 0;
}
static int unpack_subsubtlv_srv6_sid_structure(
enum isis_tlv_context context, uint8_t tlv_type, uint8_t tlv_len,
struct stream *s, struct sbuf *log, void *dest, int indent)
{
struct isis_subsubtlvs *subsubtlvs = dest;
struct isis_srv6_sid_structure_subsubtlv sid_struct = {};
sbuf_push(log, indent, "Unpacking SRv6 SID Structure...\n");
if (tlv_len != 4) {
sbuf_push(
log, indent,
"Invalid SRv6 SID Structure Sub-Sub-TLV size. (Expected 4 bytes, got %hhu)\n",
tlv_len);
return 1;
}
sid_struct.loc_block_len = stream_getc(s);
sid_struct.loc_node_len = stream_getc(s);
sid_struct.func_len = stream_getc(s);
sid_struct.arg_len = stream_getc(s);
subsubtlvs->srv6_sid_structure =
copy_subsubtlv_srv6_sid_structure(&sid_struct);
return 0;
}
static struct isis_item *copy_item(enum isis_tlv_context context,
enum isis_tlv_type type,
struct isis_item *item);