diff options
| -rw-r--r-- | src/net/tcp.c | 23 |
1 files changed, 3 insertions, 20 deletions
diff --git a/src/net/tcp.c b/src/net/tcp.c index aeacfd7..1a672df 100644 --- a/src/net/tcp.c +++ b/src/net/tcp.c @@ -101,8 +101,6 @@ struct tcp_connection { * Equivalent to Rcv.Wind.Scale in RFC 1323 terminology */ uint8_t rcv_win_scale; - /** Maximum receive window */ - uint32_t max_rcv_win; /** Selective acknowledgement list (in host-endian order) */ struct tcp_sack_block sack[TCP_SACK_MAX]; @@ -291,7 +289,6 @@ static int tcp_open ( struct interface *xfer, struct sockaddr *peer, tcp->tcp_state = TCP_STATE_SENT ( TCP_SYN ); tcp_dump_state ( tcp ); tcp->snd_seq = random(); - tcp->max_rcv_win = TCP_MAX_WINDOW_SIZE; INIT_LIST_HEAD ( &tcp->tx_queue ); INIT_LIST_HEAD ( &tcp->rx_queue ); memcpy ( &tcp->peer, st_peer, sizeof ( tcp->peer ) ); @@ -615,7 +612,6 @@ static void tcp_xmit_sack ( struct tcp_connection *tcp, uint32_t sack_seq ) { size_t len = 0; size_t sack_len; uint32_t seq_len; - uint32_t app_win; uint32_t max_rcv_win; uint32_t max_representable_win; int rc; @@ -669,10 +665,9 @@ static void tcp_xmit_sack ( struct tcp_connection *tcp, uint32_t sack_seq ) { tcp_process_tx_queue ( tcp, len, iobuf, 0 ); /* Expand receive window if possible */ - max_rcv_win = tcp->max_rcv_win; - app_win = xfer_window ( &tcp->xfer ); - if ( max_rcv_win > app_win ) - max_rcv_win = app_win; + max_rcv_win = xfer_window ( &tcp->xfer ); + if ( max_rcv_win > TCP_MAX_WINDOW_SIZE ) + max_rcv_win = TCP_MAX_WINDOW_SIZE; max_representable_win = ( 0xffff << tcp->rcv_win_scale ); if ( max_rcv_win > max_representable_win ) max_rcv_win = max_representable_win; @@ -1482,24 +1477,12 @@ struct tcpip_protocol tcp_protocol __tcpip_protocol = { static unsigned int tcp_discard ( void ) { struct tcp_connection *tcp; struct io_buffer *iobuf; - struct tcp_rx_queued_header *tcpqhdr; - uint32_t max_win; unsigned int discarded = 0; /* Try to drop one queued RX packet from each connection */ list_for_each_entry ( tcp, &tcp_conns, list ) { list_for_each_entry_reverse ( iobuf, &tcp->rx_queue, list ) { - /* Limit window to prevent future discards */ - tcpqhdr = iobuf->data; - max_win = ( tcpqhdr->seq - tcp->rcv_ack ); - if ( max_win < tcp->max_rcv_win ) { - DBGC ( tcp, "TCP %p reducing maximum window " - "from %d to %d\n", - tcp, tcp->max_rcv_win, max_win ); - tcp->max_rcv_win = max_win; - } - /* Remove packet from queue */ list_del ( &iobuf->list ); free_iob ( iobuf ); |