tests: add topotest for igmp proxy

Signed-off-by: Barry A. Trent <barry.trent@atcorp.com>

tests/topotests/lib/pim.py

@@ -4260,6 +4260,7 @@ def verify_local_igmp_groups(tgen, dut, interface, group_addresses):
     logger.debug("Exiting lib API: {}".format(sys._getframe().f_code.co_name))
     return True
 
+
 @retry(retry_timeout=62)
 def verify_static_groups(tgen, dut, interface, group_addresses):
     """
@@ -4293,7 +4294,9 @@ def verify_static_groups(tgen, dut, interface, group_addresses):
     rnode = tgen.routers()[dut]
 
     logger.info("[DUT: %s]: Verifying static groups received:", dut)
-    show_static_group_json = run_frr_cmd(rnode, "show ip igmp static-group json", isjson=True)
+    show_static_group_json = run_frr_cmd(
+        rnode, "show ip igmp static-group json", isjson=True
+    )
 
     if type(group_addresses) is not list:
         group_addresses = [group_addresses]
@@ -4330,6 +4333,71 @@ def verify_static_groups(tgen, dut, interface, group_addresses):
     logger.debug("Exiting lib API: {}".format(sys._getframe().f_code.co_name))
     return True
 
+
+@retry(retry_timeout=62)
+def verify_local_igmp_proxy_groups(
+    tgen, dut, group_addresses_present, group_addresses_not_present
+):
+    """
+    Verify igmp proxy groups are as expected by running
+    "show ip igmp static-group json" command
+
+    Parameters
+    ----------
+    * `tgen`: topogen object
+    * `dut`: device under test
+    * `group_addresses_present`: IGMP group addresses which should
+                                 currently be proxied
+    * `group_addresses_not_present`: IGMP group addresses which should
+                                     not currently be proxied
+
+    Usage
+    -----
+    dut = "r1"
+    group_addresses_present = "225.1.1.1"
+    group_addresses_not_present = "225.2.2.2"
+    result = verify_igmp_proxy_groups(tgen, dut, group_p, group_np)
+
+    Returns
+    -------
+    errormsg(str) or True
+    """
+
+    if dut not in tgen.routers():
+        errormsg = "[DUT %s]: Device not found!"
+        return errormsg
+
+    rnode = tgen.routers()[dut]
+
+    logger.info("[DUT: %s]: Verifying local IGMP proxy groups:", dut)
+
+    out = rnode.vtysh_cmd("show ip igmp proxy json", isjson=True)
+    groups = [g["group"] if "group" in g else None for g in out["r1-eth1"]["groups"]]
+
+    if type(group_addresses_present) is not list:
+        group_addresses_present = [group_addresses_present]
+    if type(group_addresses_not_present) is not list:
+        group_addresses_not_present = [group_addresses_not_present]
+
+    for test_addr in group_addresses_present:
+        if not test_addr in groups:
+            errormsg = (
+                "[DUT %s]: Verifying local IGMP proxy joins FAILED!! "
+                " Expected but not found: %s " % (dut, test_addr)
+            )
+            return errormsg
+
+    for test_addr in group_addresses_not_present:
+        if test_addr in groups:
+            errormsg = (
+                "[DUT %s]: Verifying local IGMP proxy join removed FAILED!! "
+                " Unexpected but found: %s " % (dut, test_addr)
+            )
+            return errormsg
+
+    return True
+
+
 def verify_pim_interface_traffic(tgen, input_dict, return_stats=True, addr_type="ipv4"):
     """
     Verify ip pim interface traffic by running

tests/topotests/pim_basic_igmp_proxy/r1/frr.conf

@@ -0,0 +1,29 @@
+hostname r1
+!
+interface r1-eth0
+  ip address 10.0.20.1/24
+  ip igmp
+  ip pim
+  ip igmp join 225.1.1.1
+  ip igmp join 225.2.2.2
+!
+interface r1-eth1
+  ip address 10.0.30.1/24
+  ip pim
+  ip igmp
+  ip igmp proxy
+!
+interface r1-eth2
+  ip address 10.0.40.1/24
+  ip igmp
+  ip pim
+  ip igmp join 225.3.3.3
+  ip igmp join 225.4.4.4
+!
+interface lo
+  ip address 10.254.0.1/32
+  ip pim
+!
+router pim
+  rp 10.254.0.3
+  join-prune-interval 5

tests/topotests/pim_basic_igmp_proxy/r2/frr.conf

@@ -0,0 +1,19 @@
+hostname r2
+!
+interface r2-eth0
+ ip address 10.0.20.2/24
+  ip igmp
+  ip pim
+  ip igmp proxy
+!
+interface r2-eth1
+ ip address 10.0.80.1/24
+ ip igmp
+ ip pim passive
+!
+interface lo
+ ip address 10.254.0.2/32
+!
+router pim
+  rp 10.254.0.3
+  join-prune-interval 5

tests/topotests/pim_basic_igmp_proxy/r3/frr.conf

@@ -0,0 +1,8 @@
+hostname r3
+!
+interface r3-eth0
+ ip address 10.0.40.4/24
+!
+interface lo
+ ip address 10.254.0.4/32
+!

tests/topotests/pim_basic_igmp_proxy/rp/frr.conf

@@ -0,0 +1,16 @@
+hostname rp
+!
+interface rp-eth0
+ ip address 10.0.30.3/24
+ ip pim
+!
+interface lo
+  ip address 10.254.0.3/32
+  ip pim
+!
+router pim
+  join-prune-interval 5
+  rp 10.254.0.3
+  register-accept-list ACCEPT
+
+ip prefix-list ACCEPT seq 5 permit 10.0.20.0/24 le 32