Query remote receive window size for TCP sockets

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
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      Provide a utility that would expose the remote receive-window size to a caller for a given TCP connection on the server. The following is an example of how we can query that form a TCP socket on Linux:

      void print_remote_window(int socket_fd) {
    struct tcp_info info;
    socklen_t len = sizeof(info);

    // Fetch internal TCP state from the Linux kernel
    if (getsockopt(socket_fd, IPPROTO_TCP, TCP_INFO, &info, &len) == 0) {
        // tcpi_snd_wnd is the peer's advertised receive window size in bytes
        std::cout << "Remote Receive Window Size: " << info.tcpi_snd_wnd << " bytes\n";
    } else {
        std::cerr << "Failed to get TCP_INFO: " << std::strerror(errno) << "\n";
    }
}

            Assignee:
            Unassigned
            Reporter:
            Amirsaman Memaripour
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              Created:
              Updated: