Method rcvfrom

C++/unixdgram.cpp:124–145

* @brief Receive data and store the sender's address * * @param buf Receive buffer * @param length Length of `buf` * @param source Buffer for sender's path * @param source_len `source`'s length * @param recvfrom_flags Flags for `recvfrom(2)` * * @returns How many bytes were received. Returns -1 if the socket was created * with SOCK_NONBLOCK and errno is EWOULDBLOCK. */

 * with SOCK_NONBLOCK and errno is EWOULDBLOCK.
 */
ssize_t unix_dgram::rcvfrom(void* buf, size_t length, char* source,
                            size_t source_len, int recvfrom_flags) {
    if (buf == NULL)
        throw socket_exception(__FILE__, __LINE__,
                               "unix_dgram::rcvfrom: Buffer is NULL!", false);

    ssize_t bytes;

    bytes = recvfrom_unix_dgram_socket(sfd, buf, length, source, source_len,
                                       recvfrom_flags);

    if (bytes < 0) {
        if (is_nonblocking && errno == EWOULDBLOCK)
            return -1;
        else
            throw socket_exception(
                __FILE__, __LINE__,
                "unix_dgram::rcvfrom: Could not receive data from peer!");
    }

    return bytes;
}

/**
 * @brief Receive data and store the sender's address