diff options
Diffstat (limited to 'src/include/ipxe')
| -rw-r--r-- | src/include/ipxe/tcp.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/src/include/ipxe/tcp.h b/src/include/ipxe/tcp.h index f834cc36e..b189afd73 100644 --- a/src/include/ipxe/tcp.h +++ b/src/include/ipxe/tcp.h @@ -287,7 +287,7 @@ struct tcp_options { * that payloads remain dword-aligned. */ //#define TCP_MAX_WINDOW_SIZE ( 65536 - 4 ) -#define TCP_MAX_WINDOW_SIZE 4096 +#define TCP_MAX_WINDOW_SIZE 8192 /** * Path MTU @@ -313,6 +313,35 @@ struct tcp_options { */ #define TCP_MSL ( 2 * 60 * TICKS_PER_SEC ) +/** + * Compare TCP sequence numbers + * + * @v seq1 Sequence number 1 + * @v seq2 Sequence number 2 + * @ret diff Sequence difference + * + * Analogous to memcmp(), returns an integer less than, equal to, or + * greater than zero if @c seq1 is found, respectively, to be before, + * equal to, or after @c seq2. + */ +static inline __attribute__ (( always_inline )) int32_t +tcp_cmp ( uint32_t seq1, uint32_t seq2 ) { + return ( ( int32_t ) ( seq1 - seq2 ) ); +} + +/** + * Check if TCP sequence number lies within window + * + * @v seq Sequence number + * @v start Start of window + * @v len Length of window + * @ret in_window Sequence number is within window + */ +static inline int tcp_in_window ( uint32_t seq, uint32_t start, + uint32_t len ) { + return ( ( seq - start ) < len ); +} + extern struct tcpip_protocol tcp_protocol; #endif /* _IPXE_TCP_H */ |