eSIM profile management (#30262)

* eSIM profile management

* start download

* loaded a profile

* more stuff

* fixups

* fix linter

---------

Co-authored-by: Comma Device <device@comma.ai>

system/hardware/tici/esim.py

@@ -0,0 +1,115 @@
+#!/usr/bin/env python3
+import os
+import math
+import time
+import binascii
+import requests
+import serial
+import subprocess
+
+
+def post(url, payload):
+  print()
+  print("POST to", url)
+  r = requests.post(
+    url,
+    data=payload,
+    verify=False,
+    headers={
+      "Content-Type": "application/json",
+      "X-Admin-Protocol": "gsma/rsp/v2.2.0",
+      "charset": "utf-8",
+      "User-Agent": "gsma-rsp-lpad",
+    },
+  )
+  print("resp", r)
+  print("resp text", repr(r.text))
+  print()
+  r.raise_for_status()
+
+  ret = f"HTTP/1.1 {r.status_code}"
+  ret += ''.join(f"{k}: {v}" for k, v in r.headers.items() if k != 'Connection')
+  return ret.encode() + r.content
+
+
+class LPA:
+  def __init__(self):
+    self.dev = serial.Serial('/dev/ttyUSB2', baudrate=57600, timeout=1, bytesize=8)
+    self.dev.reset_input_buffer()
+    self.dev.reset_output_buffer()
+    assert "OK" in self.at("AT")
+
+  def at(self, cmd):
+    print(f"==> {cmd}")
+    self.dev.write(cmd.encode() + b'\r\n')
+
+    r = b""
+    cnt = 0
+    while b"OK" not in r and b"ERROR" not in r and cnt < 20:
+      r += self.dev.read(8192).strip()
+      cnt += 1
+    r = r.decode()
+    print(f"<== {repr(r)}")
+    return r
+
+  def download_ota(self, qr):
+    return self.at(f'AT+QESIM="ota","{qr}"')
+
+  def download(self, qr):
+    smdp = qr.split('$')[1]
+    out = self.at(f'AT+QESIM="download","{qr}"')
+    for _ in range(5):
+      line = out.split("+QESIM: ")[1].split("\r\n\r\nOK")[0]
+
+      parts = [x.strip().strip('"') for x in line.split(',', maxsplit=4)]
+      print(repr(parts))
+      trans, ret, url, payloadlen, payload = parts
+      assert trans == "trans" and ret == "0"
+      assert len(payload) == int(payloadlen)
+
+      r = post(f"https://{smdp}/{url}", payload)
+      to_send = binascii.hexlify(r).decode()
+
+      chunk_len = 1400
+      for i in range(math.ceil(len(to_send) / chunk_len)):
+        state = 1 if (i+1)*chunk_len < len(to_send) else 0
+        data = to_send[i * chunk_len : (i+1)*chunk_len]
+        out = self.at(f'AT+QESIM="trans",{len(to_send)},{state},{i},{len(data)},"{data}"')
+        assert "OK" in out
+
+      if '+QESIM:"download",1' in out:
+        raise Exception("profile install failed")
+      elif '+QESIM:"download",0' in out:
+        print("done, successfully loaded")
+        break
+
+  def enable(self, iccid):
+    self.at(f'AT+QESIM="enable","{iccid}"')
+
+  def disable(self, iccid):
+    self.at(f'AT+QESIM="disable","{iccid}"')
+
+  def delete(self, iccid):
+    self.at(f'AT+QESIM="delete","{iccid}"')
+
+  def list_profiles(self):
+    out = self.at('AT+QESIM="list"')
+    return out.strip().splitlines()[1:]
+
+
+if __name__ == "__main__":
+  import sys
+
+  if "RESTART" in os.environ:
+    subprocess.check_call("sudo systemctl stop ModemManager", shell=True)
+    subprocess.check_call("/usr/comma/lte/lte.sh stop_blocking", shell=True)
+    subprocess.check_call("/usr/comma/lte/lte.sh start", shell=True)
+    while not os.path.exists('/dev/ttyUSB2'):
+      time.sleep(1)
+    time.sleep(3)
+
+  lpa = LPA()
+  print(lpa.list_profiles())
+  if len(sys.argv) > 1:
+    lpa.download(sys.argv[1])
+    print(lpa.list_profiles())