Bug 293544

FreeBSD 14.3-RELEASE on amd64. Testing on both the latest package and the latest port.

Let's start udpxy from command line like this:

sudo udpxy -a 127.0.0.1 -p 80 -l /var/log/udpxy.log

Let's suppose the multicast 234.5.2.1:1234 present and is available (checked by ffprobe). Trying to catch it:

curl -v -o test.bin http://127.0.0.1/udp/234.5.2.1:1234
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0*   Trying 127.0.0.1:80...
* Established connection to 127.0.0.1 (127.0.0.1 port 80) from 127.0.0.1 port 59171 
* using HTTP/1.x
> GET /udp/234.5.2.1:1234 HTTP/1.1
> Host: 127.0.0.1
> User-Agent: curl/8.16.0
> Accept: */*
> 
* Request completely sent off
< HTTP/1.1 400 Invalid address
< Server: udpxy 1.0-25.2 (prod) standard [FreeBSD 14.3-RELEASE amd64]
< Content-Type:application/octet-stream
* no chunk, no close, no size. Assume close to signal end
< 
{ [0 bytes data]
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
* shutting down connection #0

udpxy log:

2026-03-02 18:37:34.467994 MSK  S(15477)        Got 1 requests
pre-process sockets [1]: 6
2026-03-02 18:37:34.467999 MSK  S(15477)        acting on accepted socket [6] (1/1)
2026-03-02 18:37:34.468002 MSK  S(15477)        Reading command from socket [6]
2026-03-02 18:37:34.468005 MSK  S(15477)        HTTP buffer [91 bytes] received
GET /udp/234.5.2.1:1234 HTTP/1.1
Host: 127.0.0.1
User-Agent: curl/8.16.0
Accept: */*

2026-03-02 18:37:34.468015 MSK  S(15477)        Request=[udp/234.5.2.1:1234], length=[18]
2026-03-02 18:37:34.468018 MSK  S(15477)        Command [udp] with params [234.5.2.1:1234], tail [] read from socket=[6]
2026-03-02 18:37:34.468021 MSK  S(15477)        udp_relay : new_socket=[6] param=[234.5.2.1:1234]
2026-03-02 18:37:34.468025 MSK  S(15477)        Invalid  address: [^R]
2026-03-02 18:37:34.468037 MSK  S(15477)        Sent HTTP response code=[400], reason=[Invalid address] to socket=[6]
HTTP/1.1 400 Invalid address
Server: udpxy 1.0-25.2 (prod) standard [FreeBSD 14.3-RELEASE amd64]
Content-Type:application/octet-stream


2026-03-02 18:37:34.468048 MSK  S(15477)        error [3] processing client socket [6]
2026-03-02 18:37:34.468051 MSK  S(15477)        process_requests: closing accepted socket [6]
2026-03-02 18:37:34.468062 MSK  S(15477)        Processed [1/1] accepted sockets
newly-accepted sockets [1]: -1
2026-03-02 18:37:34.468067 MSK  S(15477)        All accepted sockets processed
2026-03-02 18:37:34.468069 MSK  S(15477)        Waiting for input from [2] fd's, with timeout
2026-03-02 18:37:34.468071 MSK  S(15477)        select() timeout set to [30] seconds

Tested on different servers, the same result.

udpxy built on Linux works correctly.