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| author | Wesley Coakley <wcoakley@nvidia.com> | 2020-06-18 02:20:05 +0200 |
|---|---|---|
| committer | Wesley Coakley <wcoakley@nvidia.com> | 2020-07-15 18:59:36 +0200 |
| commit | 01f23affdb68d0117d0f2be652eebd835bdbc13e (patch) | |
| tree | 206fc9c99eb5e9e65c996d8de580165cbf887c4d /zebra/rule_netlink.c | |
| parent | Merge pull request #6736 from NaveenThanikachalam/rmap_noop (diff) | |
| download | frr-01f23affdb68d0117d0f2be652eebd835bdbc13e.tar.xz frr-01f23affdb68d0117d0f2be652eebd835bdbc13e.zip | |
pbrd, zebra, lib: DSCP / ECN-based PBR Matching
Extend PBR maps to discriminate by Differentiated Services Code Point and / or
Explicit Congestion Notification fields. These fields are used in the IP header
for classifying network traffic.
0 1 2 3 4 5 6 7
+-----+-----+-----+-----+-----+-----+-----+-----+
| DS FIELD, DSCP | ECN FIELD |
+-----+-----+-----+-----+-----+-----+-----+-----+
DSCP: differentiated services codepoint
ECN: Explicit Congestion Notification
Signed-off-by: Wesley Coakley <wcoakley@nvidia.com>
Signed-off-by: Saurav Kumar Paul <saurav@cumulusnetworks.com>
Diffstat (limited to 'zebra/rule_netlink.c')
| -rw-r--r-- | zebra/rule_netlink.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/zebra/rule_netlink.c b/zebra/rule_netlink.c index b7be39850..f0cfe64b0 100644 --- a/zebra/rule_netlink.c +++ b/zebra/rule_netlink.c @@ -58,10 +58,12 @@ * Returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer * or the number of bytes written to buf. */ -static ssize_t netlink_rule_msg_encode( - int cmd, const struct zebra_dplane_ctx *ctx, uint32_t filter_bm, - uint32_t priority, uint32_t table, const struct prefix *src_ip, - const struct prefix *dst_ip, uint32_t fwmark, void *buf, size_t buflen) +static ssize_t +netlink_rule_msg_encode(int cmd, const struct zebra_dplane_ctx *ctx, + uint32_t filter_bm, uint32_t priority, uint32_t table, + const struct prefix *src_ip, + const struct prefix *dst_ip, uint32_t fwmark, + uint8_t dsfield, void *buf, size_t buflen) { uint8_t protocol = RTPROT_ZEBRA; int family; @@ -122,6 +124,10 @@ static ssize_t netlink_rule_msg_encode( return 0; } + /* dsfield, if specified */ + if (filter_bm & PBR_FILTER_DSFIELD) + req->frh.tos = dsfield; + /* Route table to use to forward, if filter criteria matches. */ if (table < 256) req->frh.table = table; @@ -145,16 +151,15 @@ static ssize_t netlink_rule_msg_encode( /* Install or uninstall specified rule for a specific interface. * Form netlink message and ship it. */ -static int -netlink_rule_update_internal(int cmd, const struct zebra_dplane_ctx *ctx, - uint32_t filter_bm, uint32_t priority, - uint32_t table, const struct prefix *src_ip, - const struct prefix *dst_ip, uint32_t fwmark) +static int netlink_rule_update_internal( + int cmd, const struct zebra_dplane_ctx *ctx, uint32_t filter_bm, + uint32_t priority, uint32_t table, const struct prefix *src_ip, + const struct prefix *dst_ip, uint32_t fwmark, uint8_t dsfield) { char buf[NL_PKT_BUF_SIZE]; netlink_rule_msg_encode(cmd, ctx, filter_bm, priority, table, src_ip, - dst_ip, fwmark, buf, sizeof(buf)); + dst_ip, fwmark, dsfield, buf, sizeof(buf)); return netlink_talk_info(netlink_talk_filter, (void *)&buf, dplane_ctx_get_ns(ctx), 0); } @@ -188,7 +193,8 @@ enum zebra_dplane_result kernel_pbr_rule_update(struct zebra_dplane_ctx *ctx) dplane_ctx_rule_get_priority(ctx), dplane_ctx_rule_get_table(ctx), dplane_ctx_rule_get_src_ip(ctx), dplane_ctx_rule_get_dst_ip(ctx), - dplane_ctx_rule_get_fwmark(ctx)); + dplane_ctx_rule_get_fwmark(ctx), + dplane_ctx_rule_get_dsfield(ctx)); /** * Delete the old one. @@ -203,7 +209,8 @@ enum zebra_dplane_result kernel_pbr_rule_update(struct zebra_dplane_ctx *ctx) dplane_ctx_rule_get_old_table(ctx), dplane_ctx_rule_get_old_src_ip(ctx), dplane_ctx_rule_get_old_dst_ip(ctx), - dplane_ctx_rule_get_old_fwmark(ctx)); + dplane_ctx_rule_get_old_fwmark(ctx), + dplane_ctx_rule_get_old_dsfield(ctx)); return (ret == 0 ? ZEBRA_DPLANE_REQUEST_SUCCESS |