[frrcfgd][bgpcfgd] Add portchannel support (#8911)

* To add portchannel support in frrcfgd and bgpcfgd
* Update is_zero_ip() to handle portchannel name
Signed-off-by: d-dashkov <Dmytro_Dashkov@Jabil.com>

src/sonic-bgpcfgd/bgpcfgd/managers_static_rt.py

@@ -169,7 +169,9 @@ class IpNextHop:
         self.ip = zero_ip(af_id) if dst_ip is None or dst_ip == '' else dst_ip
         self.interface = '' if if_name is None else if_name
         self.nh_vrf = '' if vrf is None else vrf
-        if self.blackhole != 'true' and self.is_zero_ip() and len(self.interface.strip()) == 0:
+        if not self.is_portchannel():
+            self.is_ip_valid()
+        if self.blackhole != 'true' and self.is_zero_ip() and not self.is_portchannel() and len(self.interface.strip()) == 0:
             log_err('Mandatory attribute not found for nexthop')
             raise ValueError
     def __eq__(self, other):
@@ -182,8 +184,15 @@ class IpNextHop:
                 self.distance != other.distance or self.nh_vrf != other.nh_vrf)
     def __hash__(self):
         return hash((self.af, self.blackhole, self.ip, self.interface, self.distance, self.nh_vrf))
+    def is_ip_valid(self):
+        socket.inet_pton(self.af, self.ip)
     def is_zero_ip(self):
+        try:
             return sum([x for x in socket.inet_pton(self.af, self.ip)]) == 0
+        except socket.error:
+            return False
+    def is_portchannel(self):
+        return True if self.ip.startswith('PortChannel') else False
     def __format__(self, format):
         ret_val = ''
         if self.blackhole == 'true':

src/sonic-bgpcfgd/tests/test_static_rt.py

@@ -71,6 +71,60 @@ def test_set():
         ]
     )
 
+def test_set_nhportchannel():
+    mgr = constructor()
+    set_del_test(
+        mgr,
+        "SET",
+        ("10.1.0.0/24", {
+            "nexthop": "PortChannel0001",
+        }),
+        True,
+        [
+            "ip route 10.1.0.0/24 PortChannel0001",
+            "router bgp 65100",
+            " address-family ipv4",
+            "  redistribute static",
+            " address-family ipv6",
+            "  redistribute static"
+        ]
+    )
+
+    set_del_test(
+        mgr,
+        "DEL",
+        ("10.1.0.0/24",),
+        True,
+        [
+            "no ip route 10.1.0.0/24 PortChannel0001",
+            "router bgp 65100",
+            " address-family ipv4",
+            "  no redistribute static",
+            " address-family ipv6",
+            "  no redistribute static"
+        ]
+    )
+
+def test_set_several_nhportchannels():
+    mgr = constructor()
+    set_del_test(
+        mgr,
+        "SET",
+        ("10.1.0.0/24", {
+            "nexthop": "PortChannel0003,PortChannel0004",
+        }),
+        True,
+        [
+            "ip route 10.1.0.0/24 PortChannel0003",
+            "ip route 10.1.0.0/24 PortChannel0004",
+            "router bgp 65100",
+            " address-family ipv4",
+            "  redistribute static",
+            " address-family ipv6",
+            "  redistribute static"
+        ]
+    )
+
 def test_set_nhvrf():
     mgr = constructor()
     set_del_test(

src/sonic-frr-mgmt-framework/frrcfgd/frrcfgd.py

@@ -1636,7 +1636,9 @@ class IpNextHop:
         self.interface = '' if if_name is None else if_name
         self.tag = 0 if tag is None else int(tag)
         self.nh_vrf = '' if vrf is None else vrf
-        if self.blackhole != 'true' and self.is_zero_ip() and len(self.interface.strip()) == 0:
+        if not self.is_portchannel():
+            self.is_ip_valid()
+        if self.blackhole != 'true' and self.is_zero_ip() and not self.is_portchannel() and len(self.interface.strip()) == 0:
             syslog.syslog(syslog.LOG_ERR, 'Mandatory attribute not found for nexthop')
             raise ValueError
     def __eq__(self, other):
@@ -1652,8 +1654,15 @@ class IpNextHop:
     def __str__(self):
         return 'AF %d BKH %s IP %s TRACK %d INTF %s TAG %d DIST %d VRF %s' % (
                 self.af, self.blackhole, self.ip, self.track, self.interface, self.tag, self.distance, self.nh_vrf)
+    def is_ip_valid(self):
+        socket.inet_pton(self.af, self.ip)
     def is_zero_ip(self):
+        try:
             return sum([x for x in socket.inet_pton(self.af, self.ip)]) == 0
+        except socket.error:
+            return False
+    def is_portchannel(self):
+        return True if self.ip.startswith('PortChannel') else False
     def get_arg_list(self):
         arg = lambda x: '' if x is None else x
         num_arg = lambda x: '' if x is None or x == 0 else str(x)