mirror/lwip
1
0
Fork 0
mirror of https://github.com/lwip-tcpip/lwip.git synced 2024-09-28 23:00:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

Slightly reorderd fields of struct tcp_pcb to plug holes introduced by member alignment (to reduce RAM usage)

Browse Source
This commit is contained in:
goldsimon 2011-06-26 17:53:45 +00:00 committed by goldsimon
parent 211b8be07d
commit 859fd87600
1 changed files with 14 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/include/lwip/tcp.h
View File

@ -155,11 +155,11 @@ enum tcp_state {
*/ */
#define TCP_PCB_COMMON(type) \ #define TCP_PCB_COMMON(type) \
type *next; /* for the linked list */ \ type *next; /* for the linked list */ \
enum tcp_state state; /* TCP state */ \
u8_t prio; \
void *callback_arg; \ void *callback_arg; \
/* the accept callback for listen- and normal pcbs, if LWIP_CALLBACK_API */ \ /* the accept callback for listen- and normal pcbs, if LWIP_CALLBACK_API */ \
DEF_ACCEPT_CALLBACK \ DEF_ACCEPT_CALLBACK \
enum tcp_state state; /* TCP state */ \
u8_t prio; \
/* ports are in host byte order */ \ /* ports are in host byte order */ \
u16_t local_port u16_t local_port
@ -186,21 +186,22 @@ struct tcp_pcb {
/* the rest of the fields are in host byte order /* the rest of the fields are in host byte order
as we have to do some math with them */ as we have to do some math with them */
/* Timers */
u8_t polltmr, pollinterval;
u32_t tmr;
/* receiver variables */ /* receiver variables */
u32_t rcv_nxt; /* next seqno expected */ u32_t rcv_nxt; /* next seqno expected */
u16_t rcv_wnd; /* receiver window available */ u16_t rcv_wnd; /* receiver window available */
u16_t rcv_ann_wnd; /* receiver window to announce */ u16_t rcv_ann_wnd; /* receiver window to announce */
u32_t rcv_ann_right_edge; /* announced right edge of window */ u32_t rcv_ann_right_edge; /* announced right edge of window */
/* Timers */
u32_t tmr;
u8_t polltmr, pollinterval;
/* Retransmission timer. */ /* Retransmission timer. */
s16_t rtime; s16_t rtime;
u16_t mss; /* maximum segment size */ u16_t mss; /* maximum segment size */
/* RTT (round trip time) estimation variables */ /* RTT (round trip time) estimation variables */
u32_t rttest; /* RTT estimate in 500ms ticks */ u32_t rttest; /* RTT estimate in 500ms ticks */
u32_t rtseq; /* sequence number being timed */ u32_t rtseq; /* sequence number being timed */
@ -210,22 +211,22 @@ struct tcp_pcb {
u8_t nrtx; /* number of retransmissions */ u8_t nrtx; /* number of retransmissions */
/* fast retransmit/recovery */ /* fast retransmit/recovery */
u32_t lastack; /* Highest acknowledged seqno. */
u8_t dupacks; u8_t dupacks;
u32_t lastack; /* Highest acknowledged seqno. */
/* congestion avoidance/control variables */ /* congestion avoidance/control variables */
u16_t cwnd; u16_t cwnd;
u16_t ssthresh; u16_t ssthresh;
/* sender variables */ /* sender variables */
u32_t snd_nxt; /* next new seqno to be sent */ u32_t snd_nxt; /* next new seqno to be sent */
u16_t snd_wnd; /* sender window */
u32_t snd_wl1, snd_wl2; /* Sequence and acknowledgement numbers of last u32_t snd_wl1, snd_wl2; /* Sequence and acknowledgement numbers of last
window update. */ window update. */
u32_t snd_lbb; /* Sequence number of next byte to be buffered. */ u32_t snd_lbb; /* Sequence number of next byte to be buffered. */
u16_t snd_wnd; /* sender window */
u16_t acked; u16_t acked;
u16_t snd_buf; /* Available buffer space for sending (in bytes). */ u16_t snd_buf; /* Available buffer space for sending (in bytes). */
#define TCP_SNDQUEUELEN_OVERFLOW (0xffffU-3) #define TCP_SNDQUEUELEN_OVERFLOW (0xffffU-3)
u16_t snd_queuelen; /* Available buffer space for sending (in tcp_segs). */ u16_t snd_queuelen; /* Available buffer space for sending (in tcp_segs). */