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isisd: adjust lsp size to area->lsp_size before packing

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IS-IS would ignore any area lsp-mtu setting configured after initial
creation of the LSP since move to the new tlv serialized/deserializer.

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
This commit is contained in:
Christian Franke 2018-10-16 19:17:10 +02:00
parent dc84cf1494
commit d07067ba45
1 changed files with 15 additions and 2 deletions
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17
isisd/isis_lsp.c
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@ -522,6 +522,17 @@ struct isis_lsp *lsp_new_from_recv(struct isis_lsp_hdr *hdr,
return lsp;
}
static void lsp_adjust_stream(struct isis_lsp *lsp)
{
if (lsp->pdu) {
if (STREAM_SIZE(lsp->pdu) == LLC_LEN + lsp->area->lsp_mtu)
return;
stream_free(lsp->pdu);
}
lsp->pdu = stream_new(LLC_LEN + lsp->area->lsp_mtu);
}
struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id,
uint16_t rem_lifetime, uint32_t seqno,
uint8_t lsp_bits, uint16_t checksum,
@ -532,7 +543,7 @@ struct isis_lsp *lsp_new(struct isis_area *area, uint8_t *lsp_id,
lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp));
lsp->area = area;
lsp->pdu = stream_new(LLC_LEN + area->lsp_mtu);
lsp_adjust_stream(lsp);
/* Minimal LSP PDU size */
lsp->hdr.pdu_len = ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN;
@ -1153,6 +1164,7 @@ static void lsp_build(struct isis_lsp *lsp, struct isis_area *area)
struct isis_tlvs *tlvs = lsp->tlvs;
lsp->tlvs = NULL;
lsp_adjust_stream(lsp);
lsp_pack_pdu(lsp);
size_t tlv_space = STREAM_WRITEABLE(lsp->pdu) - LLC_LEN;
lsp_clear_data(lsp);
@ -1184,6 +1196,7 @@ static void lsp_build(struct isis_lsp *lsp, struct isis_area *area)
frag = lsp_next_frag(LSP_FRAGMENT(frag->hdr.lsp_id) + 1,
lsp, area, level);
lsp_adjust_stream(frag);
}
frag->tlvs = tlvs;
}
@ -1956,7 +1969,7 @@ void lsp_purge_non_exist(int level, struct isis_lsp_hdr *hdr,
lsp = XCALLOC(MTYPE_ISIS_LSP, sizeof(struct isis_lsp));
lsp->area = area;
lsp->level = level;
lsp->pdu = stream_new(LLC_LEN + area->lsp_mtu);
lsp_adjust_stream(lsp);
lsp->age_out = ZERO_AGE_LIFETIME;
memcpy(&lsp->hdr, hdr, sizeof(lsp->hdr));