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| author |   Xavier Simonart <simonartxavier@gmail.com> | 2021-09-11 18:06:43 +0000 |
|---|---|---|
| committer | Xavier Simonart <simonartxavier@gmail.com> | 2021-09-11 18:07:43 +0000 |
| commit | 5815cd749e9c23422e4d04bf00920e493efa4be8 (patch) | |
| tree | 102b26a9a3a5e7390040c226b815e0407f617917 /VNFs | |
| parent | 57d5ce26e8bca43631f9e71607f0cfbb254906ac (diff) | |
swap: prevent printing continuous warning messages for STP and LLDP
Some switches send frequent STP (Spanning Tree) and LLDP (Link Layer
Discovery Protocol) messages. Handle_swap was printing a warning message
for each of them.
Now a warning will only be printed for the first message of each type.
Signed-off-by: Xavier Simonart <simonartxavier@gmail.com>
Change-Id: I5a8ef7b76c492451aae66fd1533c61927bc6d8f1
Diffstat (limited to 'VNFs')
| -rw-r--r-- | VNFs/DPPD-PROX/handle_swap.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/handle_swap.c b/VNFs/DPPD-PROX/handle_swap.c index 094199e4..06bbc6de 100644 --- a/VNFs/DPPD-PROX/handle_swap.c +++ b/VNFs/DPPD-PROX/handle_swap.c @@ -196,6 +196,8 @@ static int handle_swap_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, ui struct igmpv2_hdr *pigmp; prox_rte_icmp_hdr *picmp; uint8_t type; + static int llc_printed = 0; + static int lldp_printed = 0; for (j = 0; j < n_pkts; ++j) { PREFETCH0(mbufs[j]); @@ -279,9 +281,31 @@ static int handle_swap_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, ui handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]); continue; case ETYPE_LLDP: + if (!lldp_printed) { + plog_info("Discarding LLDP packets (only printed once)\n"); + lldp_printed = 1; + } out[j] = OUT_DISCARD; continue; default: + if ((rte_bswap16(hdr->ether_type) < 0x600) && (rte_bswap16(hdr->ether_type) >= 16)) { + // 802.3 + struct prox_llc { + uint8_t dsap; + uint8_t lsap; + uint8_t control; + }; + struct prox_llc *llc = (struct prox_llc *)(hdr + 1); + if ((llc->dsap == 0x42) && (llc->lsap == 0x42)) { + // STP Protocol + out[j] = OUT_DISCARD; + if (!llc_printed) { + plog_info("Discarding STP packets (only printed once)\n"); + llc_printed = 1; + } + continue; + } + } plog_warn("Unsupported ether_type 0x%x\n", hdr->ether_type); out[j] = OUT_DISCARD; continue; |