1 # lws minimal ws server raw adopt tcp
3 This example is only meaningful if you are integrating lws in another
4 app which generates its own connected sockets. In some cases you may
5 want lws to "adopt" the socket.
7 (If you simply want a connected client raw socket using lws alone, you
8 can just use lws_client_connect_via_info() with info.method = "RAW".
9 http-client/minimal-http-client shows how to do that, just set
10 info.method to "RAW".)
12 This example demonstrates how to adopt a foreign, connected socket into lws
13 as a raw wsi, bound to a specific lws protocol.
15 The example connects a socket itself to libwebsockets.org:80, and then
16 has lws adopt it as a raw wsi. The lws protocol writes "GET / HTTP/1.1"
17 to the socket and hexdumps what was sent back.
19 The socket won't close until the server side times it out, since it's
20 a raw socket that doesn't understand it's looking at http.
31 $ ./lws-minimal-raw-adopt-tcp
32 [2018/03/23 09:03:57:1960] USER: LWS minimal raw adopt tcp
33 [2018/03/23 09:03:57:1961] NOTICE: Creating Vhost 'default' port 7681, 1 protocols, IPv6 off
34 [2018/03/23 09:03:57:2079] USER: Starting connect...
35 [2018/03/23 09:03:57:4963] USER: Connected...
36 [2018/03/23 09:03:57:4963] USER: LWS_CALLBACK_RAW_ADOPT
37 [2018/03/23 09:03:57:7842] USER: LWS_CALLBACK_RAW_RX (186)
38 [2018/03/23 09:03:57:7842] NOTICE:
39 [2018/03/23 09:03:57:7842] NOTICE: 0000: 48 54 54 50 2F 31 2E 31 20 33 30 31 20 52 65 64 HTTP/1.1 301 Red
40 [2018/03/23 09:03:57:7842] NOTICE: 0010: 69 72 65 63 74 0D 0A 73 65 72 76 65 72 3A 20 6C irect..server: l
41 [2018/03/23 09:03:57:7842] NOTICE: 0020: 77 73 77 73 0D 0A 53 74 72 69 63 74 2D 54 72 61 wsws..Strict-Tra
42 [2018/03/23 09:03:57:7843] NOTICE: 0030: 6E 73 70 6F 72 74 2D 53 65 63 75 72 69 74 79 3A nsport-Security:
43 [2018/03/23 09:03:57:7843] NOTICE: 0040: 20 6D 61 78 2D 61 67 65 3D 31 35 37 36 38 30 30 max-age=1576800
44 [2018/03/23 09:03:57:7843] NOTICE: 0050: 30 20 3B 20 69 6E 63 6C 75 64 65 53 75 62 44 6F 0 ; includeSubDo
45 [2018/03/23 09:03:57:7843] NOTICE: 0060: 6D 61 69 6E 73 0D 0A 6C 6F 63 61 74 69 6F 6E 3A mains..location:
46 [2018/03/23 09:03:57:7843] NOTICE: 0070: 20 68 74 74 70 73 3A 2F 2F 6C 69 62 77 65 62 73 https://libwebs
47 [2018/03/23 09:03:57:7843] NOTICE: 0080: 6F 63 6B 65 74 73 2E 6F 72 67 0D 0A 63 6F 6E 74 ockets.org..cont
48 [2018/03/23 09:03:57:7843] NOTICE: 0090: 65 6E 74 2D 74 79 70 65 3A 20 74 65 78 74 2F 68 ent-type: text/h
49 [2018/03/23 09:03:57:7843] NOTICE: 00A0: 74 6D 6C 0D 0A 63 6F 6E 74 65 6E 74 2D 6C 65 6E tml..content-len
50 [2018/03/23 09:03:57:7843] NOTICE: 00B0: 67 74 68 3A 20 30 0D 0A 0D 0A gth: 0....
51 [2018/03/23 09:03:57:7843] NOTICE:
52 [2018/03/23 09:04:03:3627] USER: LWS_CALLBACK_RAW_CLOSE
56 Note the example does everything itself, after 5s idle the remote server closes the connection
57 after which the example continues until you ^C it.