Bug: Bad offset when sending or receiving multiple times in src/tcp.c lines 208 and 255

[bretondu42-bot]

Hello,

I spotted what appears to be a bug in src/tcp.c, lines 208 (send) and 255 (receive).

In the transmission and reception loops:

// tcp_send (), ligne 208
do {
    n = send(tcp_data->server_socket, message + n, length, 0); // <--
    ...
    length -= n;
    bytes_sent += n;
} while (length > 0);

// tcp_receive_(), ligne 255
do {
    n = recv(tcp_data->server_socket, message + n, length, flags); // <--
    ...
    length -= n;
    bytes_received += n;
} while (n > 0);

In both cases, the buffer offset should be cumulative:

• For sending: message + bytes_sent (and not message + n)
• For reception: message + bytes_received (and not message + n)

Otherwise, there is a risk of rewriting/rereading in the wrong place, or even corrupting the buffer or looping over the same data.

Please confirm and correct if necessary.

Sincerely,

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