src/core/tcp_out.c

161  * Called by tcp_write and tcp_enqueue_flags.
228  * @param apiflags API flags given to tcp_write.
249      * length required? If tcp_write is going to be called again
300 /** Checks if tcp_write is allowed or not (checks state, snd_buf and snd_queuelen).
304  * @return ERR_OK if tcp_write is allowed to proceed, another err_t otherwise
314     LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_STATE | LWIP_DBG_LEVEL_SEVERE, ("tcp_write() called in invalid state\n"));
322     LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("tcp_write: too much data (len=%"U16_F" > snd_buf=%"TCPWNDSIZE_F")\n",
328   LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_write: queuelen: %"TCPWNDSIZE_F"\n", (tcpwnd_size_t)pcb->snd_queuelen));
334     LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SEVERE, ("tcp_write: too long queue %"U16_F" (max %"U16_F")\n",
341     LWIP_ASSERT("tcp_write: pbufs on queue => at least one queue non-empty",
344     LWIP_ASSERT("tcp_write: no pbufs on queue => both queues empty",
357  * calling tcp_write().
368 tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags)
399   LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_write(pcb=%p, data=%p, len=%"U16_F", apiflags=%"U16_F")\n",
401   LWIP_ERROR("tcp_write: arg == NULL (programmer violates API)",
506                       ("tcp_write : could not allocate memory for pbuf copy size %"U16_F"\n",
524           LWIP_ASSERT("tcp_write: ROM pbufs cannot be oversized", pos == 0);
529                         ("tcp_write: could not allocate memory for zero-copy pbuf\n"));
573         LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write : could not allocate memory for pbuf copy size %"U16_F"\n", seglen));
576       LWIP_ASSERT("tcp_write: check that first pbuf can hold the complete seglen",
590         LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write: could not allocate memory for zero-copy pbuf\n"));
609         LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write: could not allocate memory for header pbuf\n"));
622       LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("tcp_write: queue too long %"U16_F" (%d)\n",
651     LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_TRACE, ("tcp_write: queueing %"U32_F":%"U32_F"\n",
698     LWIP_ASSERT("tcp_write: cannot concatenate when pcb->unsent is empty",
704     LWIP_ASSERT("tcp_write: extension of reference requires reference",
716     LWIP_ASSERT("tcp_write: concat checksum needs concatenated data",
745   LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_write: %"S16_F" (after enqueued)\n",
748     LWIP_ASSERT("tcp_write: valid queue length",
769     LWIP_ASSERT("tcp_write: valid queue length", pcb->unacked != NULL ||
772   LWIP_DEBUGF(TCP_QLEN_DEBUG | LWIP_DBG_STATE, ("tcp_write: %"S16_F" (with mem err)\n", pcb->snd_queuelen));
1097      * - if tcp_write had a memory error before (prevent delayed ACK timeout) or
1100      *   RST is no sent using tcp_write/tcp_output.