static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvconn, FAR void *pvpriv, uint16_t flags) { FAR struct tcp_conn_s *conn = (FAR struct tcp_conn_s *)pvconn; FAR struct sendfile_s *pstate = (FAR struct sendfile_s *)pvpriv; int ret; #ifdef CONFIG_NETDEV_MULTINIC /* The TCP socket is connected and, hence, should be bound to a device. * Make sure that the polling device is the own that we are bound to. */ DEBUGASSERT(conn->dev != NULL); if (dev != conn->dev) { return flags; } #endif nllvdbg("flags: %04x acked: %d sent: %d\n", flags, pstate->snd_acked, pstate->snd_sent); /* Check for a loss of connection */ if ((flags & TCP_DISCONN_EVENTS) != 0) { /* Report not connected */ nlldbg("Lost connection\n"); net_lostconnection(pstate->snd_sock, flags); pstate->snd_sent = -ENOTCONN; goto end_wait; } /* We get here if (1) not all of the data has been ACKed, (2) we have been * asked to retransmit data, (3) the connection is still healthy, and (4) * the outgoing packet is available for our use. In this case, we are * now free to send more data to receiver -- UNLESS the buffer contains * unprocessing incoming data. In that event, we will have to wait for the * next polling cycle. */ if ((flags & TCP_NEWDATA) == 0 && pstate->snd_sent < pstate->snd_flen) { /* Get the amount of data that we can send in the next packet */ uint32_t sndlen = pstate->snd_flen - pstate->snd_sent; if (sndlen > conn->mss) { sndlen = conn->mss; } /* Check if we have "space" in the window */ if ((pstate->snd_sent - pstate->snd_acked + sndlen) < conn->winsize) { uint32_t seqno; /* Then set-up to send that amount of data. (this won't actually * happen until the polling cycle completes). */ ret = file_seek(pstate->snd_file, pstate->snd_foffset + pstate->snd_sent, SEEK_SET); if (ret < 0) { int errcode = get_errno(); nlldbg("failed to lseek: %d\n", errcode); pstate->snd_sent = -errcode; goto end_wait; } ret = file_read(pstate->snd_file, dev->d_appdata, sndlen); if (ret < 0) { int errcode = get_errno(); nlldbg("failed to read from input file: %d\n", errcode); pstate->snd_sent = -errcode; goto end_wait; } dev->d_sndlen = sndlen; /* Set the sequence number for this packet. NOTE: The network updates * sndseq on recept of ACK *before* this function is called. In that * case sndseq will point to the next unacknowledge byte (which might * have already been sent). We will overwrite the value of sndseq * here before the packet is sent. */ seqno = pstate->snd_sent + pstate->snd_isn; nllvdbg("SEND: sndseq %08x->%08x len: %d\n", conn->sndseq, seqno, ret); tcp_setsequence(conn->sndseq, seqno); /* Check if the destination IP address is in the ARP or Neighbor * table. If not, then the send won't actually make it out... it * will be replaced with an ARP request or Neighbor Solicitation. */ if (pstate->snd_sent != 0 || sendfile_addrcheck(conn)) { /* Update the amount of data sent (but not necessarily ACKed) */ pstate->snd_sent += sndlen; nllvdbg("pid: %d SEND: acked=%d sent=%d flen=%d\n", getpid(), pstate->snd_acked, pstate->snd_sent, pstate->snd_flen); } } else { nlldbg("Window full, wait for ack\n"); goto wait; } } #ifdef CONFIG_NET_SOCKOPTS /* All data has been send and we are just waiting for ACK or re-transmit * indications to complete the send. Check for a timeout. */ if (sendfile_timeout(pstate)) { /* Yes.. report the timeout */ nlldbg("SEND timeout\n"); pstate->snd_sent = -ETIMEDOUT; goto end_wait; } #endif /* CONFIG_NET_SOCKOPTS */ if (pstate->snd_sent >= pstate->snd_flen && pstate->snd_acked < pstate->snd_flen) { /* All data has been sent, but there are outstanding ACK's */ goto wait; } end_wait: /* Do not allow any further callbacks */ pstate->snd_datacb->flags = 0; pstate->snd_datacb->priv = NULL; pstate->snd_datacb->event = NULL; /* Wake up the waiting thread */ sem_post(&pstate->snd_sem); wait: return flags; }
static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvconn, FAR void *pvpriv, uint16_t flags) { FAR struct tcp_conn_s *conn = (FAR struct tcp_conn_s*)pvconn; FAR struct sendfile_s *pstate = (FAR struct sendfile_s *)pvpriv; int ret; nllvdbg("flags: %04x acked: %d sent: %d\n", flags, pstate->snd_acked, pstate->snd_sent); /* Check for a loss of connection */ if ((flags & (TCP_CLOSE | TCP_ABORT | TCP_TIMEDOUT)) != 0) { /* Report not connected */ nlldbg("Lost connection\n"); net_lostconnection(pstate->snd_sock, flags); pstate->snd_sent = -ENOTCONN; goto end_wait; } /* We get here if (1) not all of the data has been ACKed, (2) we have been * asked to retransmit data, (3) the connection is still healthy, and (4) * the outgoing packet is available for our use. In this case, we are * now free to send more data to receiver -- UNLESS the buffer contains * unprocessing incoming data. In that event, we will have to wait for the * next polling cycle. */ if ((flags & TCP_NEWDATA) == 0 && pstate->snd_sent < pstate->snd_flen) { /* Get the amount of data that we can send in the next packet */ uint32_t sndlen = pstate->snd_flen - pstate->snd_sent; if (sndlen > tcp_mss(conn)) { sndlen = tcp_mss(conn); } /* Check if we have "space" in the window */ if ((pstate->snd_sent - pstate->snd_acked + sndlen) < conn->winsize) { uint32_t seqno; /* Then set-up to send that amount of data. (this won't actually * happen until the polling cycle completes). */ ret = file_seek(pstate->snd_file, pstate->snd_foffset + pstate->snd_sent, SEEK_SET); if (ret < 0) { int errcode = errno; nlldbg("failed to lseek: %d\n", errcode); pstate->snd_sent = -errcode; goto end_wait; } ret = file_read(pstate->snd_file, dev->d_snddata, sndlen); if (ret < 0) { int errcode = errno; nlldbg("failed to read from input file: %d\n", errcode); pstate->snd_sent = -errcode; goto end_wait; } dev->d_sndlen = sndlen; /* Set the sequence number for this packet. NOTE: uIP updates * sndseq on recept of ACK *before* this function is called. In that * case sndseq will point to the next unacknowledge byte (which might * have already been sent). We will overwrite the value of sndseq * here before the packet is sent. */ seqno = pstate->snd_sent + pstate->snd_isn; nllvdbg("SEND: sndseq %08x->%08x len: %d\n", conn->sndseq, seqno, ret); tcp_setsequence(conn->sndseq, seqno); /* Check if the destination IP address is in the ARP table. If not, * then the send won't actually make it out... it will be replaced with * an ARP request. * * NOTE 1: This could be an expensive check if there are a lot of entries * in the ARP table. Hence, we only check on the first packet -- when * snd_sent is zero. * * NOTE 2: If we are actually harvesting IP addresses on incoming IP * packets, then this check should not be necessary; the MAC mapping * should already be in the ARP table in many cases. * * NOTE 3: If CONFIG_NET_ARP_SEND then we can be assured that the IP * address mapping is already in the ARP table. */ #if defined(CONFIG_NET_ETHERNET) && !defined(CONFIG_NET_ARP_IPIN) && \ !defined(CONFIG_NET_ARP_SEND) if (pstate->snd_sent != 0 || arp_find(conn->ripaddr) != NULL) #endif { /* Update the amount of data sent (but not necessarily ACKed) */ pstate->snd_sent += sndlen; nllvdbg("pid: %d SEND: acked=%d sent=%d flen=%d\n", getpid(), pstate->snd_acked, pstate->snd_sent, pstate->snd_flen); } } else { nlldbg("Window full, wait for ack\n"); goto wait; } } #ifdef CONFIG_NET_SOCKOPTS /* All data has been send and we are just waiting for ACK or re-transmit * indications to complete the send. Check for a timeout. */ if (sendfile_timeout(pstate)) { /* Yes.. report the timeout */ nlldbg("SEND timeout\n"); pstate->snd_sent = -ETIMEDOUT; goto end_wait; } #endif /* CONFIG_NET_SOCKOPTS */ if (pstate->snd_sent >= pstate->snd_flen && pstate->snd_acked < pstate->snd_flen) { /* All data has been sent, but there are outstanding ACK's */ goto wait; } end_wait: /* Do not allow any further callbacks */ pstate->snd_datacb->flags = 0; pstate->snd_datacb->priv = NULL; pstate->snd_datacb->event = NULL; /* Wake up the waiting thread */ sem_post(&pstate->snd_sem); wait: return flags; }