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Merge pull request #12832 from opensourcerouting/fix/deprecate_bgp_internet_community

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bgpd: Deprecate BGP `internet` community
This commit is contained in:
Russ White 2023-02-21 11:35:26 -05:00 committed by GitHub
commit d86be4994f
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 45 additions and 61 deletions
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4
bgpd/bgp_clist.c
View File

@ -449,8 +449,12 @@ static char *community_str_get(struct community *com, int i)
comval = ntohl(comval);
switch (comval) {
#if CONFDATE > 20230801
CPP_NOTICE("Deprecate COMMUNITY_INTERNET BGP community")
#endif
case COMMUNITY_INTERNET:
str = XSTRDUP(MTYPE_COMMUNITY_STR, "internet");
zlog_warn("`internet` community is deprecated");
break;
case COMMUNITY_GSHUT:
str = XSTRDUP(MTYPE_COMMUNITY_STR, "graceful-shutdown");

13
bgpd/bgp_community.c
View File

@ -168,7 +168,6 @@ struct community *community_uniq_sort(struct community *com)
For Well-known communities value, below keyword is used.
0x0 "internet"
0xFFFF0000 "graceful-shutdown"
0xFFFF0001 "accept-own"
0xFFFF0002 "route-filter-translated-v4"
@ -229,8 +228,12 @@ static void set_community_string(struct community *com, bool make_json,
comval = ntohl(comval);
switch (comval) {
#if CONFDATE > 20230801
CPP_NOTICE("Deprecate COMMUNITY_INTERNET BGP community")
#endif
case COMMUNITY_INTERNET:
len += strlen(" internet");
zlog_warn("`internet` community is deprecated");
break;
case COMMUNITY_GSHUT:
len += strlen(" graceful-shutdown");
@ -295,6 +298,9 @@ static void set_community_string(struct community *com, bool make_json,
strlcat(str, " ", len);
switch (comval) {
#if CONFDATE > 20230801
CPP_NOTICE("Deprecate COMMUNITY_INTERNET BGP community")
#endif
case COMMUNITY_INTERNET:
strlcat(str, "internet", len);
if (make_json) {
@ -303,6 +309,7 @@ static void set_community_string(struct community *com, bool make_json,
json_object_array_add(json_community_list,
json_string);
}
zlog_warn("`internet` community is deprecated");
break;
case COMMUNITY_GSHUT:
strlcat(str, "graceful-shutdown", len);
@ -673,10 +680,14 @@ community_gettoken(const char *buf, enum community_token *token, uint32_t *val)
/* Well known community string check. */
if (isalpha((unsigned char)*p)) {
#if CONFDATE > 20230801
CPP_NOTICE("Deprecate COMMUNITY_INTERNET BGP community")
#endif
if (strncmp(p, "internet", strlen("internet")) == 0) {
*val = COMMUNITY_INTERNET;
*token = community_token_no_export;
p += strlen("internet");
zlog_warn("`internet` community is deprecated");
return p;
}
if (strncmp(p, "graceful-shutdown", strlen("graceful-shutdown"))

3
bgpd/bgp_community.h
View File

@ -30,6 +30,9 @@ struct community {
};
/* Well-known communities value. */
#if CONFDATE > 20230801
CPP_NOTICE("Deprecate COMMUNITY_INTERNET BGP community")
#endif
#define COMMUNITY_INTERNET 0x0
#define COMMUNITY_GSHUT 0xFFFF0000
#define COMMUNITY_ACCEPT_OWN 0xFFFF0001

5
bgpd/bgp_routemap.c
View File

@ -5902,9 +5902,14 @@ DEFUN_YANG (set_community,
else
first = 1;
#if CONFDATE > 20230801
CPP_NOTICE("Deprecate COMMUNITY_INTERNET BGP community")
#endif
if (strncmp(argv[i]->arg, "internet", strlen(argv[i]->arg))
== 0) {
buffer_putstr(b, "internet");
vty_out(vty, "%% `internet` community is deprecated\n");
zlog_warn("`internet` community is deprecated");
continue;
}
if (strncmp(argv[i]->arg, "local-AS", strlen(argv[i]->arg))

17
doc/user/bgp.rst
View File

@ -2114,9 +2114,6 @@ is 4 octet long. The following format is used to define the community value.
``7675:80`` can be used when AS 7675 wants to pass local policy value 80 to
neighboring peer.
``internet``
``internet`` represents well-known communities value 0.
``graceful-shutdown``
``graceful-shutdown`` represents well-known communities value
``GRACEFUL_SHUTDOWN`` ``0xFFFF0000`` ``65535:0``. :rfc:`8326` implements
@ -2487,17 +2484,6 @@ community-list.
match community FILTER
The communities value keyword ``internet`` has special meanings in standard
community lists. In the below example ``internet`` matches all BGP routes even
if the route does not have communities attribute at all. So community list
``INTERNET`` is the same as ``FILTER`` in the previous example.
.. code-block:: frr
bgp community-list standard INTERNET deny 1:1
bgp community-list standard INTERNET permit internet
The following configuration is an example of communities value deletion. With
this configuration the community values ``100:1`` and ``100:2`` are removed
from BGP updates. For communities value deletion, only ``permit``
@ -2567,9 +2553,6 @@ Extended Community Lists
there is no matched entry, deny will be returned. When `extcommunity` is
empty it matches to any routes.
A special handling for ``internet`` community is applied. It matches
any community.
.. clicmd:: bgp extcommunity-list expanded NAME permit|deny LINE
This command defines a new expanded extcommunity-list. `line` is a string

32
tests/topotests/bgp_communities_topo1/test_bgp_communities_topo2.py
View File

@ -11,7 +11,7 @@
Following tests are covered to test bgp community functionality:
1. Verify that BGP well known communities work fine for
eBGP and iBGP peers.
Well known communities tested: no-export, local-AS, internet
Well known communities tested: no-export, local-AS
"""
@ -140,11 +140,11 @@ def teardown_module(mod):
#####################################################
def test_bgp_no_export_local_as_and_internet_communities_p0(request):
def test_bgp_no_export_local_as_communities_p0(request):
"""
Verify that BGP well known communities work fine for
eBGP and iBGP peers.
Well known communities tested: no-export, local-AS, internet
Well known communities tested: no-export, local-AS
"""
tc_name = request.node.name
@ -170,7 +170,7 @@ def test_bgp_no_export_local_as_and_internet_communities_p0(request):
tc_name, result
)
for comm_type in ["no-export", "local-AS", "internet"]:
for comm_type in ["no-export", "local-AS"]:
step("Create a route-map on R1 to set community as {}".format(comm_type))
@ -258,38 +258,16 @@ def test_bgp_no_export_local_as_and_internet_communities_p0(request):
tc_name, result
)
if comm_type == "internet":
step(
"Verify that these prefixes, originated on R1, are"
"received on both R2 and R3"
)
result = verify_rib(
tgen,
addr_type,
"r3",
input_dict_4,
next_hop=topo["routers"]["r1"]["links"]["r3"][addr_type].split("/")[
0
],
)
assert result is True, "Testcase {} : Failed \n Error: {}".format(
tc_name, result
)
else:
step(
"Verify that these prefixes, originated on R1, are not"
"received on R3 but received on R2"
)
result = verify_rib(
tgen,
addr_type,
"r3",
input_dict_4,
next_hop=topo["routers"]["r1"]["links"]["r3"][addr_type].split("/")[
0
],
next_hop=topo["routers"]["r1"]["links"]["r3"][addr_type].split("/")[0],
expected=False,
)
assert result is not True, (