Example on how you can interact with StrongSwan be means of Vici API

interacting-with-vici.py

import vici
import json

s = vici.Session()
for i in s.list_sas():
  print json.dumps(i, indent=2)

# sample output:
# {
#   "rw": {
#     "uniqueid": "1",
#     "version": "2",
#     "state": "ESTABLISHED",
#     "local-host": "192.168.10.100",
#     "local-port": "4500",
#     "local-id": "192.168.10.100",
#     "remote-host": "192.168.10.200",
#     "remote-port": "4500",
#     "remote-id": "192.168.10.200",
#     "initiator-spi": "21b050a4c5d40f0c",
#     "responder-spi": "6f63b5b2a276e66b",
#     "encr-alg": "AES_CBC",
#     "encr-keysize": "128",
#     "integ-alg": "HMAC_SHA1_96",
#     "prf-alg": "PRF_HMAC_SHA1",
#     "dh-group": "MODP_2048",
#     "established": "2166",
#     "reauth-time": "1211",
#     "child-sas": {
#       "rw-3": {
#         "name": "rw",
#         "uniqueid": "3",
#         "reqid": "1",
#         "state": "INSTALLED",
#         "mode": "TUNNEL",
#         "protocol": "ESP",
#         "spi-in": "cf4d1430",
#         "spi-out": "cc912d07",
#         "encr-alg": "AES_CBC",
#         "encr-keysize": "128",
#         "integ-alg": "HMAC_SHA1_96",
#         "bytes-in": "76",
#         "packets-in": "1",
#         "use-in": "292",
#         "bytes-out": "76",
#         "packets-out": "1",
#         "use-out": "292",
#         "rekey-time": "437",
#         "life-time": "780",
#         "install-time": "420",
#         "local-ts": [
#           "0.0.0.0/0"
#         ],
#         "remote-ts": [
#           "192.168.10.200/32"
#         ]
#       }
#     }
#   }
# }