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| author | Carmine Scarpitta <carmine.scarpitta@uniroma2.it> | 2023-02-14 11:30:45 +0100 |
|---|---|---|
| committer | Carmine Scarpitta <carmine.scarpitta@uniroma2.it> | 2023-09-11 17:35:13 +0200 |
| commit | b2f0b7d0b053ca5c81875ada994260b004b4268f (patch) | |
| tree | 837e47a45a8d7b111df375ecb2889e6cb93e0a4a /isisd | |
| parent | isisd: Free SRv6 Locator TLV when freeing TLVs (diff) | |
| download | frr-b2f0b7d0b053ca5c81875ada994260b004b4268f.tar.xz frr-b2f0b7d0b053ca5c81875ada994260b004b4268f.zip | |
isisd: Add pack function for SRv6 Locator TLV
Add a function to pack an SRv6 Locator TLV and all its Sub-TLVs
(RFC 9352 section #7.1).
Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
Diffstat (limited to 'isisd')
| -rw-r--r-- | isisd/isis_tlvs.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/isisd/isis_tlvs.c b/isisd/isis_tlvs.c index 2d24a98c4..b0ec3d2d6 100644 --- a/isisd/isis_tlvs.c +++ b/isisd/isis_tlvs.c @@ -5588,6 +5588,43 @@ static void free_item_srv6_locator(struct isis_item *i) XFREE(MTYPE_ISIS_TLV, item); } +static int pack_item_srv6_locator(struct isis_item *i, struct stream *s, + size_t *min_len) +{ + struct isis_srv6_locator_tlv *loc = (struct isis_srv6_locator_tlv *)i; + + if (STREAM_WRITEABLE(s) < 7 + (unsigned)PSIZE(loc->prefix.prefixlen)) { + *min_len = 7 + (unsigned)PSIZE(loc->prefix.prefixlen); + return 1; + } + + stream_putl(s, loc->metric); + stream_putc(s, loc->flags); + stream_putc(s, loc->algorithm); + /* Locator size */ + stream_putc(s, loc->prefix.prefixlen); + /* Locator prefix */ + stream_put(s, &loc->prefix.prefix.s6_addr, + PSIZE(loc->prefix.prefixlen)); + + if (loc->subtlvs) { + /* Pack Sub-TLVs */ + if (pack_subtlvs(loc->subtlvs, s)) + return 1; + } else { + /* No Sub-TLVs */ + if (STREAM_WRITEABLE(s) < 1) { + *min_len = 8 + (unsigned)PSIZE(loc->prefix.prefixlen); + return 1; + } + + /* Put 0 as Sub-TLV length, because we have no Sub-TLVs */ + stream_putc(s, 0); + } + + return 0; +} + /* Functions related to tlvs in general */ struct isis_tlvs *isis_alloc_tlvs(void) |