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Merge pull request #11508 from louis-6wind/lsp-parse

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isisd: fix infinite loop when parsing LSPs
This commit is contained in:
Russ White 2022-07-05 09:48:19 -04:00 committed by GitHub
commit c718a13d60
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1 changed files with 11 additions and 20 deletions
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31
isisd/isis_spf.c
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@ -1400,20 +1400,21 @@ static void spf_adj_list_parse_tlv(struct isis_spftree *spftree,
spf_adj_list_parse_lsp(spftree, adj_list, lsp, id, metric);
}
static void spf_adj_list_parse_lsp_frag(struct isis_spftree *spftree,
struct list *adj_list,
struct isis_lsp *lsp,
const uint8_t *pseudo_nodeid,
uint32_t pseudo_metric)
static void spf_adj_list_parse_lsp(struct isis_spftree *spftree,
struct list *adj_list, struct isis_lsp *lsp,
const uint8_t *pseudo_nodeid,
uint32_t pseudo_metric)
{
bool pseudo_lsp = LSP_PSEUDO_ID(lsp->hdr.lsp_id);
struct isis_lsp *frag;
struct listnode *node;
struct isis_item *head;
struct isis_item_list *te_neighs;
if (lsp->hdr.seqno == 0 || lsp->hdr.rem_lifetime == 0)
return;
/* Parse main LSP. */
/* Parse LSP. */
if (lsp->tlvs) {
if (pseudo_lsp || spftree->mtid == ISIS_MT_IPV4_UNICAST) {
head = lsp->tlvs->oldstyle_reach.head;
@ -1444,27 +1445,17 @@ static void spf_adj_list_parse_lsp_frag(struct isis_spftree *spftree,
}
}
}
}
static void spf_adj_list_parse_lsp(struct isis_spftree *spftree,
struct list *adj_list, struct isis_lsp *lsp,
const uint8_t *pseudo_nodeid,
uint32_t pseudo_metric)
{
struct isis_lsp *frag;
struct listnode *node;
spf_adj_list_parse_lsp_frag(spftree, adj_list, lsp, pseudo_nodeid,
pseudo_metric);
if (LSP_FRAGMENT(lsp->hdr.lsp_id))
return;
/* Parse LSP fragments. */
for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) {
if (!frag->tlvs)
continue;
spf_adj_list_parse_lsp_frag(spftree, adj_list, frag,
pseudo_nodeid, pseudo_metric);
spf_adj_list_parse_lsp(spftree, adj_list, frag, pseudo_nodeid,
pseudo_metric);
}
}