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isisd: Add pack func for Sub-Sub-TLVs in general

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Add a function to pack all the Sub-Sub-TLVs passed as an argument.

At this time, this function does not pack any Sub-Sub-TLVs because no
Sub-Sub-TLVs have been defined yet. This function will be extended in
future commits to pack specific Sub-Sub-TLVs, as they become supported.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2023-03-12 21:19:12 +01:00
parent ac62420870
commit dce3e4515f
1 changed files with 19 additions and 0 deletions
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19
isisd/isis_tlvs.c
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@ -2014,6 +2014,25 @@ static void isis_free_subsubtlvs(struct isis_subsubtlvs *subsubtlvs)
XFREE(MTYPE_ISIS_SUBSUBTLV, subsubtlvs);
}
static int isis_pack_subsubtlvs(struct isis_subsubtlvs *subsubtlvs,
struct stream *s)
{
int rv;
size_t subsubtlv_len_pos = stream_get_endp(s);
if (STREAM_WRITEABLE(s) < 1)
return 1;
stream_putc(s, 0); /* Put 0 as Sub-Sub-TLVs length, filled in later */
size_t subsubtlv_len = stream_get_endp(s) - subsubtlv_len_pos - 1;
if (subsubtlv_len > 255)
return 1;
stream_putc_at(s, subsubtlv_len_pos, subsubtlv_len);
return 0;
}
/* Functions related to subtlvs */
static struct isis_subtlvs *isis_alloc_subtlvs(enum isis_tlv_context context)