problems with exoteric (/DSP) architectures showing these problems.
We still have to fix some of these issues neatly.
- * TODO: the PPP code is broken in a few ways. There are namespace
- collisions on BSD systems and many assumptions on word-length
- (sizeof(int)). In ppp.c an assumption is made on the availability of
- a thread subsystem. Either PPP needs to be moved to contrib/ports/???
- or rearranged to be more generic.
-
HISTORY
(CVS HEAD)
++ New features:
+ 2010-02-21: Simon Goldschmidt
+ * tcp.h (and usages), added tcp_impl.h: Splitted API and internal
+ implementation of tcp to make API usage cleare to application programmers
+
2010-02-14: Simon Goldschmidt/Stephane Lesage
* ip_addr.h: Improved some defines working on ip addresses, added faster
macro to copy addresses that cannot be NULL
++ Port changes
- * Added 3 new files: def.c, timers.c, timers.h
+ * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h
+
+ * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains
+ the actual application programmer's API
* Separated timer implementation from sys.h/.c, moved to timers.h/.c
#include "lwip/ip.h"
#include "lwip/raw.h"
#include "lwip/udp.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/snmp_msg.h"
#include "lwip/autoip.h"
#include "lwip/igmp.h"
#include "lwip/igmp.h"
#include "lwip/raw.h"
#include "lwip/udp.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/snmp.h"
#include "lwip/dhcp.h"
#include "lwip/stats.h"
#include "lwip/netif.h"
#include "lwip/icmp.h"
#include "lwip/udp.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/stats.h"
#include "lwip/pbuf.h"
#include "lwip/udp.h"
#include "lwip/raw.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/igmp.h"
#include "lwip/api.h"
#include "lwip/api_msg.h"
#include "lwip/def.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/snmp.h"
#include "lwip/igmp.h"
#include "netif/etharp.h"
#include "lwip/sys.h"
#include "arch/perf.h"
#if TCP_QUEUE_OOSEQ
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#endif
#include <string.h>
#include "lwip/netif.h"
#include "lwip/ip.h"
#include "lwip/ip_frag.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/udp.h"
#include "lwip/snmp_asn1.h"
#include "lwip/snmp_structs.h"
#include "lwip/memp.h"
#include "lwip/snmp.h"
#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/debug.h"
#include "lwip/stats.h"
case ESTABLISHED:
case CLOSE_WAIT:
return tcp_close_shutdown(pcb, 0);
+ default:
+ /* don't shut down other states */
+ break;
}
}
/* @todo: return another err_t if not in correct state or already shut? */
tcp_pcb_remove(&tcp_tw_pcbs, pcb);
memp_free(MEMP_TCP_PCB, pcb);
} else {
+ /* @todo: pcb->state, LISTEN not allowed */
seqno = pcb->snd_nxt;
ackno = pcb->rcv_nxt;
ip_addr_copy(local_ip, pcb->local_ip);
}
}
+/**
+ * Aborts the connection by sending a RST (reset) segment to the remote
+ * host. The pcb is deallocated. This function never fails.
+ *
+ * ATTENTION: When calling this from one of the TCP callbacks, make
+ * sure you always return ERR_ABRT (and never return ERR_ABRT otherwise
+ * or you will risk accessing deallocated memory or memory leaks!
+ *
+ * @param pcb the tcp pcb to abort
+ */
+void
+tcp_abort(struct tcp_pcb *pcb)
+{
+ tcp_abandon(pcb, 1);
+}
+
/**
* Binds the connection to a local portnumber and IP address. If the
* IP address is not given (i.e., ipaddr == NULL), the IP address of
#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/def.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/memp.h"
#include "lwip/tcpip.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/ip_frag.h"
#include "netif/etharp.h"
#include "lwip/dhcp.h"
*/
typedef err_t (*tcp_connected_fn)(void *arg, struct tcp_pcb *tpcb, err_t err);
-/* Functions for interfacing with TCP: */
-
-/* Lower layer interface to TCP: */
-#define tcp_init() /* Compatibility define, not init needed. */
-void tcp_tmr (void); /* Must be called every
- TCP_TMR_INTERVAL
- ms. (Typically 250 ms). */
-/* Application program's interface: */
-struct tcp_pcb * tcp_new (void);
-struct tcp_pcb * tcp_alloc (u8_t prio);
-
-void tcp_arg (struct tcp_pcb *pcb, void *arg);
-void tcp_accept (struct tcp_pcb *pcb, tcp_accept_fn accept);
-void tcp_recv (struct tcp_pcb *pcb, tcp_recv_fn recv);
-void tcp_sent (struct tcp_pcb *pcb, tcp_sent_fn sent);
-void tcp_poll (struct tcp_pcb *pcb, tcp_poll_fn poll, u8_t interval);
-void tcp_err (struct tcp_pcb *pcb, tcp_err_fn err);
-
-#define tcp_mss(pcb) ((pcb)->mss)
-#define tcp_sndbuf(pcb) ((pcb)->snd_buf)
-#define tcp_sndqueuelen(pcb) ((pcb)->snd_queuelen)
-#define tcp_nagle_disable(pcb) ((pcb)->flags |= TF_NODELAY)
-#define tcp_nagle_enable(pcb) ((pcb)->flags &= ~TF_NODELAY)
-#define tcp_nagle_disabled(pcb) (((pcb)->flags & TF_NODELAY) != 0)
-
-#if TCP_LISTEN_BACKLOG
-#define tcp_accepted(pcb) (((struct tcp_pcb_listen *)(pcb))->accepts_pending--)
-#else /* TCP_LISTEN_BACKLOG */
-#define tcp_accepted(pcb) LWIP_UNUSED_ARG(pcb);
-#endif /* TCP_LISTEN_BACKLOG */
-
-void tcp_recved (struct tcp_pcb *pcb, u16_t len);
-err_t tcp_bind (struct tcp_pcb *pcb, ip_addr_t *ipaddr,
- u16_t port);
-err_t tcp_connect (struct tcp_pcb *pcb, ip_addr_t *ipaddr,
- u16_t port, tcp_connected_fn connected);
-
-struct tcp_pcb * tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog);
-#define tcp_listen(pcb) tcp_listen_with_backlog(pcb, TCP_DEFAULT_LISTEN_BACKLOG)
-
-void tcp_abandon (struct tcp_pcb *pcb, int reset);
-#define tcp_abort(pcb) tcp_abandon((pcb), 1)
-err_t tcp_close (struct tcp_pcb *pcb);
-err_t tcp_shutdown(struct tcp_pcb *pcb, int shut_rx, int shut_tx);
-
-/* Flags for "apiflags" parameter in tcp_write and tcp_enqueue */
-#define TCP_WRITE_FLAG_COPY 0x01
-#define TCP_WRITE_FLAG_MORE 0x02
-
-err_t tcp_write (struct tcp_pcb *pcb, const void *dataptr, u16_t len,
- u8_t apiflags);
-
-void tcp_setprio (struct tcp_pcb *pcb, u8_t prio);
-
-#define TCP_PRIO_MIN 1
-#define TCP_PRIO_NORMAL 64
-#define TCP_PRIO_MAX 127
-
-/* It is also possible to call these two functions at the right
- intervals (instead of calling tcp_tmr()). */
-void tcp_slowtmr (void);
-void tcp_fasttmr (void);
-
-
-/* Only used by IP to pass a TCP segment to TCP: */
-void tcp_input (struct pbuf *p, struct netif *inp);
-/* Used within the TCP code only: */
-err_t tcp_send_empty_ack(struct tcp_pcb *pcb);
-err_t tcp_output (struct tcp_pcb *pcb);
-void tcp_rexmit (struct tcp_pcb *pcb);
-void tcp_rexmit_rto (struct tcp_pcb *pcb);
-void tcp_rexmit_fast (struct tcp_pcb *pcb);
-u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb);
-
-/**
- * This is the Nagle algorithm: try to combine user data to send as few TCP
- * segments as possible. Only send if
- * - no previously transmitted data on the connection remains unacknowledged or
- * - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or
- * - the only unsent segment is at least pcb->mss bytes long (or there is more
- * than one unsent segment - with lwIP, this can happen although unsent->len < mss)
- * - or if we are in fast-retransmit (TF_INFR)
- */
-#define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \
- ((tpcb)->flags & (TF_NODELAY | TF_INFR)) || \
- (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \
- ((tpcb)->unsent->len >= (tpcb)->mss))) \
- ) ? 1 : 0)
-#define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK)
-
-
-#define TCP_SEQ_LT(a,b) ((s32_t)((a)-(b)) < 0)
-#define TCP_SEQ_LEQ(a,b) ((s32_t)((a)-(b)) <= 0)
-#define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0)
-#define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0)
-/* is b<=a<=c? */
-#if 0 /* see bug #10548 */
-#define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b))
-#endif
-#define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c))
-#define TCP_FIN 0x01U
-#define TCP_SYN 0x02U
-#define TCP_RST 0x04U
-#define TCP_PSH 0x08U
-#define TCP_ACK 0x10U
-#define TCP_URG 0x20U
-#define TCP_ECE 0x40U
-#define TCP_CWR 0x80U
-
-#define TCP_FLAGS 0x3fU
-
-/* Length of the TCP header, excluding options. */
-#define TCP_HLEN 20
-
-#ifndef TCP_TMR_INTERVAL
-#define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */
-#endif /* TCP_TMR_INTERVAL */
-
-#ifndef TCP_FAST_INTERVAL
-#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */
-#endif /* TCP_FAST_INTERVAL */
-
-#ifndef TCP_SLOW_INTERVAL
-#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */
-#endif /* TCP_SLOW_INTERVAL */
-
-#define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */
-#define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */
-
-#define TCP_OOSEQ_TIMEOUT 6U /* x RTO */
-
-#ifndef TCP_MSL
-#define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */
-#endif
-
-/* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */
-#ifndef TCP_KEEPIDLE_DEFAULT
-#define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */
-#endif
-
-#ifndef TCP_KEEPINTVL_DEFAULT
-#define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */
-#endif
-
-#ifndef TCP_KEEPCNT_DEFAULT
-#define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */
-#endif
-
-#define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */
-
-/* Fields are (of course) in network byte order.
- * Some fields are converted to host byte order in tcp_input().
- */
-#ifdef PACK_STRUCT_USE_INCLUDES
-# include "arch/bpstruct.h"
-#endif
-PACK_STRUCT_BEGIN
-struct tcp_hdr {
- PACK_STRUCT_FIELD(u16_t src);
- PACK_STRUCT_FIELD(u16_t dest);
- PACK_STRUCT_FIELD(u32_t seqno);
- PACK_STRUCT_FIELD(u32_t ackno);
- PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags);
- PACK_STRUCT_FIELD(u16_t wnd);
- PACK_STRUCT_FIELD(u16_t chksum);
- PACK_STRUCT_FIELD(u16_t urgp);
-} PACK_STRUCT_STRUCT;
-PACK_STRUCT_END
-#ifdef PACK_STRUCT_USE_INCLUDES
-# include "arch/epstruct.h"
-#endif
-
-#define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8)
-#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
-#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
-
-#define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr))
-#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
-#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & htons((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags))
-#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags))
-#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
-
-#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0))
-
enum tcp_state {
CLOSED = 0,
LISTEN = 1,
TIME_WAIT = 10
};
-/** Flags used on input processing, not on pcb->flags
-*/
-#define TF_RESET (u8_t)0x08U /* Connection was reset. */
-#define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */
-#define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */
-
-
#if LWIP_CALLBACK_API
/* Function to call when a listener has been connected.
* @param arg user-supplied argument (tcp_pcb.callback_arg)
u16_t size,
err_t err);
-#define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
- LWIP_EVENT_ACCEPT, NULL, 0, err)
-#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
- LWIP_EVENT_SENT, NULL, space, ERR_OK)
-#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
- LWIP_EVENT_RECV, (p), 0, (err))
-#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
- LWIP_EVENT_CONNECTED, NULL, 0, (err))
-#define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
- LWIP_EVENT_POLL, NULL, 0, ERR_OK)
-#define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \
- LWIP_EVENT_ERR, NULL, 0, (err))
-#else /* LWIP_EVENT_API */
-
-#define TCP_EVENT_ACCEPT(pcb,err,ret) \
- do { \
- if((pcb)->accept != NULL) \
- (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \
- else (ret) = ERR_ARG; \
- } while (0)
-
-#define TCP_EVENT_SENT(pcb,space,ret) \
- do { \
- if((pcb)->sent != NULL) \
- (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \
- else (ret) = ERR_OK; \
- } while (0)
-
-#define TCP_EVENT_RECV(pcb,p,err,ret) \
- do { \
- if(((pcb)->recv != NULL) && (!((pcb)->flags & TF_RXCLOSED))) { \
- (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err)); \
- } else { \
- (ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \
- } \
- } while (0)
-
-#define TCP_EVENT_CONNECTED(pcb,err,ret) \
- do { \
- if((pcb)->connected != NULL) \
- (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \
- else (ret) = ERR_OK; \
- } while (0)
-
-#define TCP_EVENT_POLL(pcb,ret) \
- do { \
- if((pcb)->poll != NULL) \
- (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \
- else (ret) = ERR_OK; \
- } while (0)
-
-#define TCP_EVENT_ERR(errf,arg,err) \
- do { \
- if((errf) != NULL) \
- (errf)((arg),(err)); \
- } while (0)
-
#endif /* LWIP_EVENT_API */
-/* This structure represents a TCP segment on the unsent and unacked queues */
-struct tcp_seg {
- struct tcp_seg *next; /* used when putting segements on a queue */
- struct pbuf *p; /* buffer containing data + TCP header */
- void *dataptr; /* pointer to the TCP data in the pbuf */
- u16_t len; /* the TCP length of this segment */
- u8_t flags;
-#define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option. */
-#define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */
- struct tcp_hdr *tcphdr; /* the TCP header */
-};
-
-#define LWIP_TCP_OPT_LENGTH(flags) \
- (flags & TF_SEG_OPTS_MSS ? 4 : 0) + \
- (flags & TF_SEG_OPTS_TS ? 12 : 0)
-
-/** This returns a TCP header option for MSS in an u32_t */
-#define TCP_BUILD_MSS_OPTION(x) (x) = htonl(((u32_t)2 << 24) | \
- ((u32_t)4 << 16) | \
- (((u32_t)TCP_MSS / 256) << 8) | \
- (TCP_MSS & 255))
+/* Application program's interface: */
+struct tcp_pcb * tcp_new (void);
-/* Internal functions and global variables: */
-struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb);
-void tcp_pcb_purge(struct tcp_pcb *pcb);
-void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb);
+void tcp_arg (struct tcp_pcb *pcb, void *arg);
+void tcp_accept (struct tcp_pcb *pcb, tcp_accept_fn accept);
+void tcp_recv (struct tcp_pcb *pcb, tcp_recv_fn recv);
+void tcp_sent (struct tcp_pcb *pcb, tcp_sent_fn sent);
+void tcp_poll (struct tcp_pcb *pcb, tcp_poll_fn poll, u8_t interval);
+void tcp_err (struct tcp_pcb *pcb, tcp_err_fn err);
-void tcp_segs_free(struct tcp_seg *seg);
-void tcp_seg_free(struct tcp_seg *seg);
-struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg);
+#define tcp_mss(pcb) ((pcb)->mss)
+#define tcp_sndbuf(pcb) ((pcb)->snd_buf)
+#define tcp_sndqueuelen(pcb) ((pcb)->snd_queuelen)
+#define tcp_nagle_disable(pcb) ((pcb)->flags |= TF_NODELAY)
+#define tcp_nagle_enable(pcb) ((pcb)->flags &= ~TF_NODELAY)
+#define tcp_nagle_disabled(pcb) (((pcb)->flags & TF_NODELAY) != 0)
-#define tcp_ack(pcb) \
- do { \
- if((pcb)->flags & TF_ACK_DELAY) { \
- (pcb)->flags &= ~TF_ACK_DELAY; \
- (pcb)->flags |= TF_ACK_NOW; \
- } \
- else { \
- (pcb)->flags |= TF_ACK_DELAY; \
- } \
- } while (0)
+#if TCP_LISTEN_BACKLOG
+#define tcp_accepted(pcb) (((struct tcp_pcb_listen *)(pcb))->accepts_pending--)
+#else /* TCP_LISTEN_BACKLOG */
+#define tcp_accepted(pcb) LWIP_UNUSED_ARG(pcb);
+#endif /* TCP_LISTEN_BACKLOG */
-#define tcp_ack_now(pcb) \
- do { \
- (pcb)->flags |= TF_ACK_NOW; \
- } while (0)
+void tcp_recved (struct tcp_pcb *pcb, u16_t len);
+err_t tcp_bind (struct tcp_pcb *pcb, ip_addr_t *ipaddr,
+ u16_t port);
+err_t tcp_connect (struct tcp_pcb *pcb, ip_addr_t *ipaddr,
+ u16_t port, tcp_connected_fn connected);
-err_t tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags);
-err_t tcp_enqueue(struct tcp_pcb *pcb, void *dataptr, u16_t len,
- u8_t flags, u8_t apiflags, u8_t optflags);
+struct tcp_pcb * tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog);
+#define tcp_listen(pcb) tcp_listen_with_backlog(pcb, TCP_DEFAULT_LISTEN_BACKLOG)
-void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg);
+void tcp_abort (struct tcp_pcb *pcb);
+err_t tcp_close (struct tcp_pcb *pcb);
+err_t tcp_shutdown(struct tcp_pcb *pcb, int shut_rx, int shut_tx);
-void tcp_rst(u32_t seqno, u32_t ackno,
- ip_addr_t *local_ip, ip_addr_t *remote_ip,
- u16_t local_port, u16_t remote_port);
+/* Flags for "apiflags" parameter in tcp_write and tcp_enqueue */
+#define TCP_WRITE_FLAG_COPY 0x01
+#define TCP_WRITE_FLAG_MORE 0x02
-u32_t tcp_next_iss(void);
+err_t tcp_write (struct tcp_pcb *pcb, const void *dataptr, u16_t len,
+ u8_t apiflags);
-void tcp_keepalive(struct tcp_pcb *pcb);
-void tcp_zero_window_probe(struct tcp_pcb *pcb);
+void tcp_setprio (struct tcp_pcb *pcb, u8_t prio);
-#if TCP_CALCULATE_EFF_SEND_MSS
-u16_t tcp_eff_send_mss(u16_t sendmss, ip_addr_t *addr);
-#endif /* TCP_CALCULATE_EFF_SEND_MSS */
+#define TCP_PRIO_MIN 1
+#define TCP_PRIO_NORMAL 64
+#define TCP_PRIO_MAX 127
-#if LWIP_CALLBACK_API
-err_t tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
-#endif /* LWIP_CALLBACK_API */
+err_t tcp_output (struct tcp_pcb *pcb);
-extern struct tcp_pcb *tcp_input_pcb;
-extern u32_t tcp_ticks;
const char* tcp_debug_state_str(enum tcp_state s);
-#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
-void tcp_debug_print(struct tcp_hdr *tcphdr);
-void tcp_debug_print_flags(u8_t flags);
-void tcp_debug_print_state(enum tcp_state s);
-void tcp_debug_print_pcbs(void);
-s16_t tcp_pcbs_sane(void);
-#else
-# define tcp_debug_print(tcphdr)
-# define tcp_debug_print_flags(flags)
-# define tcp_debug_print_state(s)
-# define tcp_debug_print_pcbs()
-# define tcp_pcbs_sane() 1
-#endif /* TCP_DEBUG */
-
-void tcp_timer_needed(void);
-
-/* The TCP PCB lists. */
-union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */
- struct tcp_pcb_listen *listen_pcbs;
- struct tcp_pcb *pcbs;
-};
-extern union tcp_listen_pcbs_t tcp_listen_pcbs;
-extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a
- state in which they accept or send
- data. */
-extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */
-
-extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */
-
-/* Axioms about the above lists:
- 1) Every TCP PCB that is not CLOSED is in one of the lists.
- 2) A PCB is only in one of the lists.
- 3) All PCBs in the tcp_listen_pcbs list is in LISTEN state.
- 4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state.
-*/
-
-/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB
- with a PCB list or removes a PCB from a list, respectively. */
-#if 0
-#define TCP_REG(pcbs, npcb) do {\
- LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", npcb, npcb->local_port)); \
- for(tcp_tmp_pcb = *pcbs; \
- tcp_tmp_pcb != NULL; \
- tcp_tmp_pcb = tcp_tmp_pcb->next) { \
- LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != npcb); \
- } \
- LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", npcb->state != CLOSED); \
- npcb->next = *pcbs; \
- LWIP_ASSERT("TCP_REG: npcb->next != npcb", npcb->next != npcb); \
- *(pcbs) = npcb; \
- LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
- tcp_timer_needed(); \
- } while(0)
-#define TCP_RMV(pcbs, npcb) do { \
- LWIP_ASSERT("TCP_RMV: pcbs != NULL", *pcbs != NULL); \
- LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", npcb, *pcbs)); \
- if(*pcbs == npcb) { \
- *pcbs = (*pcbs)->next; \
- } else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \
- if(tcp_tmp_pcb->next == npcb) { \
- tcp_tmp_pcb->next = npcb->next; \
- break; \
- } \
- } \
- npcb->next = NULL; \
- LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
- LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", npcb, *pcbs)); \
- } while(0)
-
-#else /* LWIP_DEBUG */
-
-#define TCP_REG(pcbs, npcb) \
- do { \
- npcb->next = *pcbs; \
- *(pcbs) = npcb; \
- tcp_timer_needed(); \
- } while (0)
-
-#define TCP_RMV(pcbs, npcb) \
- do { \
- if(*(pcbs) == npcb) { \
- (*(pcbs)) = (*pcbs)->next; \
- } \
- else { \
- for(tcp_tmp_pcb = *pcbs; \
- tcp_tmp_pcb != NULL; \
- tcp_tmp_pcb = tcp_tmp_pcb->next) { \
- if(tcp_tmp_pcb->next == npcb) { \
- tcp_tmp_pcb->next = npcb->next; \
- break; \
- } \
- } \
- } \
- npcb->next = NULL; \
- } while(0)
-
-#endif /* LWIP_DEBUG */
+
#ifdef __cplusplus
}
--- /dev/null
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_TCP_IMPL_H__
+#define __LWIP_TCP_IMPL_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/tcp.h"
+#include "lwip/sys.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip.h"
+#include "lwip/icmp.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Functions for interfacing with TCP: */
+
+/* Lower layer interface to TCP: */
+#define tcp_init() /* Compatibility define, no init needed. */
+void tcp_tmr (void); /* Must be called every
+ TCP_TMR_INTERVAL
+ ms. (Typically 250 ms). */
+/* It is also possible to call these two functions at the right
+ intervals (instead of calling tcp_tmr()). */
+void tcp_slowtmr (void);
+void tcp_fasttmr (void);
+
+
+/* Only used by IP to pass a TCP segment to TCP: */
+void tcp_input (struct pbuf *p, struct netif *inp);
+/* Used within the TCP code only: */
+struct tcp_pcb * tcp_alloc (u8_t prio);
+void tcp_abandon (struct tcp_pcb *pcb, int reset);
+err_t tcp_send_empty_ack(struct tcp_pcb *pcb);
+void tcp_rexmit (struct tcp_pcb *pcb);
+void tcp_rexmit_rto (struct tcp_pcb *pcb);
+void tcp_rexmit_fast (struct tcp_pcb *pcb);
+u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb);
+
+/**
+ * This is the Nagle algorithm: try to combine user data to send as few TCP
+ * segments as possible. Only send if
+ * - no previously transmitted data on the connection remains unacknowledged or
+ * - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or
+ * - the only unsent segment is at least pcb->mss bytes long (or there is more
+ * than one unsent segment - with lwIP, this can happen although unsent->len < mss)
+ * - or if we are in fast-retransmit (TF_INFR)
+ */
+#define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \
+ ((tpcb)->flags & (TF_NODELAY | TF_INFR)) || \
+ (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \
+ ((tpcb)->unsent->len >= (tpcb)->mss))) \
+ ) ? 1 : 0)
+#define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK)
+
+
+#define TCP_SEQ_LT(a,b) ((s32_t)((a)-(b)) < 0)
+#define TCP_SEQ_LEQ(a,b) ((s32_t)((a)-(b)) <= 0)
+#define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0)
+#define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0)
+/* is b<=a<=c? */
+#if 0 /* see bug #10548 */
+#define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b))
+#endif
+#define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c))
+#define TCP_FIN 0x01U
+#define TCP_SYN 0x02U
+#define TCP_RST 0x04U
+#define TCP_PSH 0x08U
+#define TCP_ACK 0x10U
+#define TCP_URG 0x20U
+#define TCP_ECE 0x40U
+#define TCP_CWR 0x80U
+
+#define TCP_FLAGS 0x3fU
+
+/* Length of the TCP header, excluding options. */
+#define TCP_HLEN 20
+
+#ifndef TCP_TMR_INTERVAL
+#define TCP_TMR_INTERVAL 250 /* The TCP timer interval in milliseconds. */
+#endif /* TCP_TMR_INTERVAL */
+
+#ifndef TCP_FAST_INTERVAL
+#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */
+#endif /* TCP_FAST_INTERVAL */
+
+#ifndef TCP_SLOW_INTERVAL
+#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in milliseconds */
+#endif /* TCP_SLOW_INTERVAL */
+
+#define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */
+#define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */
+
+#define TCP_OOSEQ_TIMEOUT 6U /* x RTO */
+
+#ifndef TCP_MSL
+#define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */
+#endif
+
+/* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */
+#ifndef TCP_KEEPIDLE_DEFAULT
+#define TCP_KEEPIDLE_DEFAULT 7200000UL /* Default KEEPALIVE timer in milliseconds */
+#endif
+
+#ifndef TCP_KEEPINTVL_DEFAULT
+#define TCP_KEEPINTVL_DEFAULT 75000UL /* Default Time between KEEPALIVE probes in milliseconds */
+#endif
+
+#ifndef TCP_KEEPCNT_DEFAULT
+#define TCP_KEEPCNT_DEFAULT 9U /* Default Counter for KEEPALIVE probes */
+#endif
+
+#define TCP_MAXIDLE TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT /* Maximum KEEPALIVE probe time */
+
+/* Fields are (of course) in network byte order.
+ * Some fields are converted to host byte order in tcp_input().
+ */
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct tcp_hdr {
+ PACK_STRUCT_FIELD(u16_t src);
+ PACK_STRUCT_FIELD(u16_t dest);
+ PACK_STRUCT_FIELD(u32_t seqno);
+ PACK_STRUCT_FIELD(u32_t ackno);
+ PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags);
+ PACK_STRUCT_FIELD(u16_t wnd);
+ PACK_STRUCT_FIELD(u16_t chksum);
+ PACK_STRUCT_FIELD(u16_t urgp);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+# include "arch/epstruct.h"
+#endif
+
+#define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8)
+#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
+#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
+
+#define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr))
+#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
+#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & htons((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags))
+#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | htons(flags))
+#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
+
+#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & (TCP_FIN | TCP_SYN)) != 0))
+
+/** Flags used on input processing, not on pcb->flags
+*/
+#define TF_RESET (u8_t)0x08U /* Connection was reset. */
+#define TF_CLOSED (u8_t)0x10U /* Connection was sucessfully closed. */
+#define TF_GOT_FIN (u8_t)0x20U /* Connection was closed by the remote end. */
+
+
+#if LWIP_EVENT_API
+
+#define TCP_EVENT_ACCEPT(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+ LWIP_EVENT_ACCEPT, NULL, 0, err)
+#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+ LWIP_EVENT_SENT, NULL, space, ERR_OK)
+#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+ LWIP_EVENT_RECV, (p), 0, (err))
+#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+ LWIP_EVENT_CONNECTED, NULL, 0, (err))
+#define TCP_EVENT_POLL(pcb,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+ LWIP_EVENT_POLL, NULL, 0, ERR_OK)
+#define TCP_EVENT_ERR(errf,arg,err) lwip_tcp_event((arg), NULL, \
+ LWIP_EVENT_ERR, NULL, 0, (err))
+
+#else /* LWIP_EVENT_API */
+
+#define TCP_EVENT_ACCEPT(pcb,err,ret) \
+ do { \
+ if((pcb)->accept != NULL) \
+ (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err)); \
+ else (ret) = ERR_ARG; \
+ } while (0)
+
+#define TCP_EVENT_SENT(pcb,space,ret) \
+ do { \
+ if((pcb)->sent != NULL) \
+ (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space)); \
+ else (ret) = ERR_OK; \
+ } while (0)
+
+#define TCP_EVENT_RECV(pcb,p,err,ret) \
+ do { \
+ if(((pcb)->recv != NULL) && (!((pcb)->flags & TF_RXCLOSED))) { \
+ (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err)); \
+ } else { \
+ (ret) = tcp_recv_null(NULL, (pcb), (p), (err)); \
+ } \
+ } while (0)
+
+#define TCP_EVENT_CONNECTED(pcb,err,ret) \
+ do { \
+ if((pcb)->connected != NULL) \
+ (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \
+ else (ret) = ERR_OK; \
+ } while (0)
+
+#define TCP_EVENT_POLL(pcb,ret) \
+ do { \
+ if((pcb)->poll != NULL) \
+ (ret) = (pcb)->poll((pcb)->callback_arg,(pcb)); \
+ else (ret) = ERR_OK; \
+ } while (0)
+
+#define TCP_EVENT_ERR(errf,arg,err) \
+ do { \
+ if((errf) != NULL) \
+ (errf)((arg),(err)); \
+ } while (0)
+
+#endif /* LWIP_EVENT_API */
+
+/* This structure represents a TCP segment on the unsent and unacked queues */
+struct tcp_seg {
+ struct tcp_seg *next; /* used when putting segements on a queue */
+ struct pbuf *p; /* buffer containing data + TCP header */
+ void *dataptr; /* pointer to the TCP data in the pbuf */
+ u16_t len; /* the TCP length of this segment */
+ u8_t flags;
+#define TF_SEG_OPTS_MSS (u8_t)0x01U /* Include MSS option. */
+#define TF_SEG_OPTS_TS (u8_t)0x02U /* Include timestamp option. */
+ struct tcp_hdr *tcphdr; /* the TCP header */
+};
+
+#define LWIP_TCP_OPT_LENGTH(flags) \
+ (flags & TF_SEG_OPTS_MSS ? 4 : 0) + \
+ (flags & TF_SEG_OPTS_TS ? 12 : 0)
+
+/** This returns a TCP header option for MSS in an u32_t */
+#define TCP_BUILD_MSS_OPTION(x) (x) = htonl(((u32_t)2 << 24) | \
+ ((u32_t)4 << 16) | \
+ (((u32_t)TCP_MSS / 256) << 8) | \
+ (TCP_MSS & 255))
+
+/* Global variables: */
+extern struct tcp_pcb *tcp_input_pcb;
+extern u32_t tcp_ticks;
+
+/* The TCP PCB lists. */
+union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */
+ struct tcp_pcb_listen *listen_pcbs;
+ struct tcp_pcb *pcbs;
+};
+extern union tcp_listen_pcbs_t tcp_listen_pcbs;
+extern struct tcp_pcb *tcp_active_pcbs; /* List of all TCP PCBs that are in a
+ state in which they accept or send
+ data. */
+extern struct tcp_pcb *tcp_tw_pcbs; /* List of all TCP PCBs in TIME-WAIT. */
+
+extern struct tcp_pcb *tcp_tmp_pcb; /* Only used for temporary storage. */
+
+/* Axioms about the above lists:
+ 1) Every TCP PCB that is not CLOSED is in one of the lists.
+ 2) A PCB is only in one of the lists.
+ 3) All PCBs in the tcp_listen_pcbs list is in LISTEN state.
+ 4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state.
+*/
+/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB
+ with a PCB list or removes a PCB from a list, respectively. */
+#if 0
+#define TCP_REG(pcbs, npcb) do {\
+ LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", npcb, npcb->local_port)); \
+ for(tcp_tmp_pcb = *pcbs; \
+ tcp_tmp_pcb != NULL; \
+ tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+ LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != npcb); \
+ } \
+ LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", npcb->state != CLOSED); \
+ npcb->next = *pcbs; \
+ LWIP_ASSERT("TCP_REG: npcb->next != npcb", npcb->next != npcb); \
+ *(pcbs) = npcb; \
+ LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
+ tcp_timer_needed(); \
+ } while(0)
+#define TCP_RMV(pcbs, npcb) do { \
+ LWIP_ASSERT("TCP_RMV: pcbs != NULL", *pcbs != NULL); \
+ LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", npcb, *pcbs)); \
+ if(*pcbs == npcb) { \
+ *pcbs = (*pcbs)->next; \
+ } else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+ if(tcp_tmp_pcb->next == npcb) { \
+ tcp_tmp_pcb->next = npcb->next; \
+ break; \
+ } \
+ } \
+ npcb->next = NULL; \
+ LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
+ LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", npcb, *pcbs)); \
+ } while(0)
+
+#else /* LWIP_DEBUG */
+
+#define TCP_REG(pcbs, npcb) \
+ do { \
+ npcb->next = *pcbs; \
+ *(pcbs) = npcb; \
+ tcp_timer_needed(); \
+ } while (0)
+
+#define TCP_RMV(pcbs, npcb) \
+ do { \
+ if(*(pcbs) == npcb) { \
+ (*(pcbs)) = (*pcbs)->next; \
+ } \
+ else { \
+ for(tcp_tmp_pcb = *pcbs; \
+ tcp_tmp_pcb != NULL; \
+ tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+ if(tcp_tmp_pcb->next == npcb) { \
+ tcp_tmp_pcb->next = npcb->next; \
+ break; \
+ } \
+ } \
+ } \
+ npcb->next = NULL; \
+ } while(0)
+
+#endif /* LWIP_DEBUG */
+
+
+/* Internal functions: */
+struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb);
+void tcp_pcb_purge(struct tcp_pcb *pcb);
+void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb);
+
+void tcp_segs_free(struct tcp_seg *seg);
+void tcp_seg_free(struct tcp_seg *seg);
+struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg);
+
+#define tcp_ack(pcb) \
+ do { \
+ if((pcb)->flags & TF_ACK_DELAY) { \
+ (pcb)->flags &= ~TF_ACK_DELAY; \
+ (pcb)->flags |= TF_ACK_NOW; \
+ } \
+ else { \
+ (pcb)->flags |= TF_ACK_DELAY; \
+ } \
+ } while (0)
+
+#define tcp_ack_now(pcb) \
+ do { \
+ (pcb)->flags |= TF_ACK_NOW; \
+ } while (0)
+
+err_t tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags);
+err_t tcp_enqueue(struct tcp_pcb *pcb, void *dataptr, u16_t len,
+ u8_t flags, u8_t apiflags, u8_t optflags);
+
+void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg);
+
+void tcp_rst(u32_t seqno, u32_t ackno,
+ ip_addr_t *local_ip, ip_addr_t *remote_ip,
+ u16_t local_port, u16_t remote_port);
+
+u32_t tcp_next_iss(void);
+
+void tcp_keepalive(struct tcp_pcb *pcb);
+void tcp_zero_window_probe(struct tcp_pcb *pcb);
+
+#if TCP_CALCULATE_EFF_SEND_MSS
+u16_t tcp_eff_send_mss(u16_t sendmss, ip_addr_t *addr);
+#endif /* TCP_CALCULATE_EFF_SEND_MSS */
+
+#if LWIP_CALLBACK_API
+err_t tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
+#endif /* LWIP_CALLBACK_API */
+
+#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
+void tcp_debug_print(struct tcp_hdr *tcphdr);
+void tcp_debug_print_flags(u8_t flags);
+void tcp_debug_print_state(enum tcp_state s);
+void tcp_debug_print_pcbs(void);
+s16_t tcp_pcbs_sane(void);
+#else
+# define tcp_debug_print(tcphdr)
+# define tcp_debug_print_flags(flags)
+# define tcp_debug_print_state(s)
+# define tcp_debug_print_pcbs()
+# define tcp_pcbs_sane() 1
+#endif /* TCP_DEBUG */
+
+/** External function (implemented in timers.c), called when TCP detects
+ * that a timer is needed (i.e. active- or time-wait-pcb found). */
+void tcp_timer_needed(void);
+
+
+/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB
+ with a PCB list or removes a PCB from a list, respectively. */
+#if 0
+#define TCP_REG(pcbs, npcb) do {\
+ LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", npcb, npcb->local_port)); \
+ for(tcp_tmp_pcb = *pcbs; \
+ tcp_tmp_pcb != NULL; \
+ tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+ LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != npcb); \
+ } \
+ LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", npcb->state != CLOSED); \
+ npcb->next = *pcbs; \
+ LWIP_ASSERT("TCP_REG: npcb->next != npcb", npcb->next != npcb); \
+ *(pcbs) = npcb; \
+ LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
+ tcp_timer_needed(); \
+ } while(0)
+#define TCP_RMV(pcbs, npcb) do { \
+ LWIP_ASSERT("TCP_RMV: pcbs != NULL", *pcbs != NULL); \
+ LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", npcb, *pcbs)); \
+ if(*pcbs == npcb) { \
+ *pcbs = (*pcbs)->next; \
+ } else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+ if(tcp_tmp_pcb->next == npcb) { \
+ tcp_tmp_pcb->next = npcb->next; \
+ break; \
+ } \
+ } \
+ npcb->next = NULL; \
+ LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
+ LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", npcb, *pcbs)); \
+ } while(0)
+
+#else /* LWIP_DEBUG */
+
+#define TCP_REG(pcbs, npcb) \
+ do { \
+ npcb->next = *pcbs; \
+ *(pcbs) = npcb; \
+ tcp_timer_needed(); \
+ } while (0)
+
+#define TCP_RMV(pcbs, npcb) \
+ do { \
+ if(*(pcbs) == npcb) { \
+ (*(pcbs)) = (*pcbs)->next; \
+ } \
+ else { \
+ for(tcp_tmp_pcb = *pcbs; \
+ tcp_tmp_pcb != NULL; \
+ tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+ if(tcp_tmp_pcb->next == npcb) { \
+ tcp_tmp_pcb->next = npcb->next; \
+ break; \
+ } \
+ } \
+ } \
+ npcb->next = NULL; \
+ } while(0)
+
+#endif /* LWIP_DEBUG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_TCP */
+
+#endif /* __LWIP_TCP_H__ */
#include "tcp_helper.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/stats.h"
#include "lwip/pbuf.h"
#include "lwip/inet_chksum.h"
#include "test_tcp.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/stats.h"
#include "tcp_helper.h"
#include "test_tcp_oos.h"
-#include "lwip/tcp.h"
+#include "lwip/tcp_impl.h"
#include "lwip/stats.h"
#include "tcp_helper.h"
projects / pes-rpp / rpp-lwip.git / commitdiff