diff options
Diffstat (limited to 'src/include/gpxe')
| -rw-r--r-- | src/include/gpxe/tcp.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/include/gpxe/tcp.h b/src/include/gpxe/tcp.h index 6c07f4ae9..fb0c89a7e 100644 --- a/src/include/gpxe/tcp.h +++ b/src/include/gpxe/tcp.h @@ -66,6 +66,8 @@ struct tcp_operations { * Transmit data * * @v conn TCP connection + * @v buf Temporary data buffer + * @v len Length of temporary data buffer * * The application should transmit whatever it currently wants * to send using tcp_send(). If retransmissions are required, @@ -73,8 +75,16 @@ struct tcp_operations { * regenerate the data. The easiest way to implement this is * to ensure that senddata() never changes the application's * state. + * + * The application may use the temporary data buffer to + * construct the data to be sent. Note that merely filling + * the buffer will do nothing; the application must call + * tcp_send() in order to actually transmit the data. Use of + * the buffer is not compulsory; the application may call + * tcp_send() on any block of data. */ - void ( * senddata ) ( struct tcp_connection *conn ); + void ( * senddata ) ( struct tcp_connection *conn, void *buf, + size_t len ); }; /** @@ -88,8 +98,6 @@ struct tcp_connection { struct tcp_operations *tcp_op; }; -extern void *tcp_buffer; -extern size_t tcp_buflen; extern void tcp_connect ( struct tcp_connection *conn ); extern void tcp_send ( struct tcp_connection *conn, const void *data, size_t len ); |