diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/net/lwip/lwip/api/api_msg.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/net/lwip/lwip/api/api_msg.c | 1535 |
1 files changed, 1535 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/net/lwip/lwip/api/api_msg.c b/tmk_core/tool/mbed/mbed-sdk/libraries/net/lwip/lwip/api/api_msg.c new file mode 100644 index 0000000000..448f96dda0 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/net/lwip/lwip/api/api_msg.c @@ -0,0 +1,1535 @@ +/** + * @file + * Sequential API Internal module + * + */ + +/* + * 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> + * + */ + +#include "lwip/opt.h" + +#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/api_msg.h" + +#include "lwip/ip.h" +#include "lwip/udp.h" +#include "lwip/tcp.h" +#include "lwip/raw.h" + +#include "lwip/memp.h" +#include "lwip/tcpip.h" +#include "lwip/igmp.h" +#include "lwip/dns.h" + +#include <string.h> + +#define SET_NONBLOCKING_CONNECT(conn, val) do { if(val) { \ + (conn)->flags |= NETCONN_FLAG_IN_NONBLOCKING_CONNECT; \ +} else { \ + (conn)->flags &= ~ NETCONN_FLAG_IN_NONBLOCKING_CONNECT; }} while(0) +#define IN_NONBLOCKING_CONNECT(conn) (((conn)->flags & NETCONN_FLAG_IN_NONBLOCKING_CONNECT) != 0) + +/* forward declarations */ +#if LWIP_TCP +static err_t do_writemore(struct netconn *conn); +static void do_close_internal(struct netconn *conn); +#endif + +#if LWIP_RAW +/** + * Receive callback function for RAW netconns. + * Doesn't 'eat' the packet, only references it and sends it to + * conn->recvmbox + * + * @see raw.h (struct raw_pcb.recv) for parameters and return value + */ +static u8_t +recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p, + ip_addr_t *addr) +{ + struct pbuf *q; + struct netbuf *buf; + struct netconn *conn; + + LWIP_UNUSED_ARG(addr); + conn = (struct netconn *)arg; + + if ((conn != NULL) && sys_mbox_valid(&conn->recvmbox)) { +#if LWIP_SO_RCVBUF + int recv_avail; + SYS_ARCH_GET(conn->recv_avail, recv_avail); + if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) { + return 0; + } +#endif /* LWIP_SO_RCVBUF */ + /* copy the whole packet into new pbufs */ + q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM); + if(q != NULL) { + if (pbuf_copy(q, p) != ERR_OK) { + pbuf_free(q); + q = NULL; + } + } + + if (q != NULL) { + u16_t len; + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + pbuf_free(q); + return 0; + } + + buf->p = q; + buf->ptr = q; + ip_addr_copy(buf->addr, *ip_current_src_addr()); + buf->port = pcb->protocol; + + len = q->tot_len; + if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) { + netbuf_delete(buf); + return 0; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } + } + } + + return 0; /* do not eat the packet */ +} +#endif /* LWIP_RAW*/ + +#if LWIP_UDP +/** + * Receive callback function for UDP netconns. + * Posts the packet to conn->recvmbox or deletes it on memory error. + * + * @see udp.h (struct udp_pcb.recv) for parameters + */ +static void +recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p, + ip_addr_t *addr, u16_t port) +{ + struct netbuf *buf; + struct netconn *conn; + u16_t len; +#if LWIP_SO_RCVBUF + int recv_avail; +#endif /* LWIP_SO_RCVBUF */ + + LWIP_UNUSED_ARG(pcb); /* only used for asserts... */ + LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL); + LWIP_ASSERT("recv_udp must have an argument", arg != NULL); + conn = (struct netconn *)arg; + LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb); + +#if LWIP_SO_RCVBUF + SYS_ARCH_GET(conn->recv_avail, recv_avail); + if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox) || + ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) { +#else /* LWIP_SO_RCVBUF */ + if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox)) { +#endif /* LWIP_SO_RCVBUF */ + pbuf_free(p); + return; + } + + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + pbuf_free(p); + return; + } else { + buf->p = p; + buf->ptr = p; + ip_addr_set(&buf->addr, addr); + buf->port = port; +#if LWIP_NETBUF_RECVINFO + { + const struct ip_hdr* iphdr = ip_current_header(); + /* get the UDP header - always in the first pbuf, ensured by udp_input */ + const struct udp_hdr* udphdr = (void*)(((char*)iphdr) + IPH_LEN(iphdr)); +#if LWIP_CHECKSUM_ON_COPY + buf->flags = NETBUF_FLAG_DESTADDR; +#endif /* LWIP_CHECKSUM_ON_COPY */ + ip_addr_set(&buf->toaddr, ip_current_dest_addr()); + buf->toport_chksum = udphdr->dest; + } +#endif /* LWIP_NETBUF_RECVINFO */ + } + + len = p->tot_len; + if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) { + netbuf_delete(buf); + return; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } +} +#endif /* LWIP_UDP */ + +#if LWIP_TCP +/** + * Receive callback function for TCP netconns. + * Posts the packet to conn->recvmbox, but doesn't delete it on errors. + * + * @see tcp.h (struct tcp_pcb.recv) for parameters and return value + */ +static err_t +recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + struct netconn *conn; + u16_t len; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL); + LWIP_ASSERT("recv_tcp must have an argument", arg != NULL); + conn = (struct netconn *)arg; + LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb); + + if (conn == NULL) { + return ERR_VAL; + } + if (!sys_mbox_valid(&conn->recvmbox)) { + /* recvmbox already deleted */ + if (p != NULL) { + tcp_recved(pcb, p->tot_len); + pbuf_free(p); + } + return ERR_OK; + } + /* Unlike for UDP or RAW pcbs, don't check for available space + using recv_avail since that could break the connection + (data is already ACKed) */ + + /* don't overwrite fatal errors! */ + NETCONN_SET_SAFE_ERR(conn, err); + + if (p != NULL) { + len = p->tot_len; + } else { + len = 0; + } + + if (sys_mbox_trypost(&conn->recvmbox, p) != ERR_OK) { + /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */ + return ERR_MEM; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } + + return ERR_OK; +} + +/** + * Poll callback function for TCP netconns. + * Wakes up an application thread that waits for a connection to close + * or data to be sent. The application thread then takes the + * appropriate action to go on. + * + * Signals the conn->sem. + * netconn_close waits for conn->sem if closing failed. + * + * @see tcp.h (struct tcp_pcb.poll) for parameters and return value + */ +static err_t +poll_tcp(void *arg, struct tcp_pcb *pcb) +{ + struct netconn *conn = (struct netconn *)arg; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + if (conn->state == NETCONN_WRITE) { + do_writemore(conn); + } else if (conn->state == NETCONN_CLOSE) { + do_close_internal(conn); + } + /* @todo: implement connect timeout here? */ + + /* Did a nonblocking write fail before? Then check available write-space. */ + if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) { + /* If the queued byte- or pbuf-count drops below the configured low-water limit, + let select mark this pcb as writable again. */ + if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) && + (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) { + conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE; + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + } + } + + return ERR_OK; +} + +/** + * Sent callback function for TCP netconns. + * Signals the conn->sem and calls API_EVENT. + * netconn_write waits for conn->sem if send buffer is low. + * + * @see tcp.h (struct tcp_pcb.sent) for parameters and return value + */ +static err_t +sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len) +{ + struct netconn *conn = (struct netconn *)arg; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + if (conn->state == NETCONN_WRITE) { + do_writemore(conn); + } else if (conn->state == NETCONN_CLOSE) { + do_close_internal(conn); + } + + if (conn) { + /* If the queued byte- or pbuf-count drops below the configured low-water limit, + let select mark this pcb as writable again. */ + if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) && + (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) { + conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE; + API_EVENT(conn, NETCONN_EVT_SENDPLUS, len); + } + } + + return ERR_OK; +} + +/** + * Error callback function for TCP netconns. + * Signals conn->sem, posts to all conn mboxes and calls API_EVENT. + * The application thread has then to decide what to do. + * + * @see tcp.h (struct tcp_pcb.err) for parameters + */ +static void +err_tcp(void *arg, err_t err) +{ + struct netconn *conn; + enum netconn_state old_state; + SYS_ARCH_DECL_PROTECT(lev); + + conn = (struct netconn *)arg; + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + conn->pcb.tcp = NULL; + + /* no check since this is always fatal! */ + SYS_ARCH_PROTECT(lev); + conn->last_err = err; + SYS_ARCH_UNPROTECT(lev); + + /* reset conn->state now before waking up other threads */ + old_state = conn->state; + conn->state = NETCONN_NONE; + + /* Notify the user layer about a connection error. Used to signal + select. */ + API_EVENT(conn, NETCONN_EVT_ERROR, 0); + /* Try to release selects pending on 'read' or 'write', too. + They will get an error if they actually try to read or write. */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + + /* pass NULL-message to recvmbox to wake up pending recv */ + if (sys_mbox_valid(&conn->recvmbox)) { + /* use trypost to prevent deadlock */ + sys_mbox_trypost(&conn->recvmbox, NULL); + } + /* pass NULL-message to acceptmbox to wake up pending accept */ + if (sys_mbox_valid(&conn->acceptmbox)) { + /* use trypost to preven deadlock */ + sys_mbox_trypost(&conn->acceptmbox, NULL); + } + + if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) || + (old_state == NETCONN_CONNECT)) { + /* calling do_writemore/do_close_internal is not necessary + since the pcb has already been deleted! */ + int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn); + SET_NONBLOCKING_CONNECT(conn, 0); + + if (!was_nonblocking_connect) { + /* set error return code */ + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + conn->current_msg->err = err; + conn->current_msg = NULL; + /* wake up the waiting task */ + sys_sem_signal(&conn->op_completed); + } + } else { + LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL); + } +} + +/** + * Setup a tcp_pcb with the correct callback function pointers + * and their arguments. + * + * @param conn the TCP netconn to setup + */ +static void +setup_tcp(struct netconn *conn) +{ + struct tcp_pcb *pcb; + + pcb = conn->pcb.tcp; + tcp_arg(pcb, conn); + tcp_recv(pcb, recv_tcp); + tcp_sent(pcb, sent_tcp); + tcp_poll(pcb, poll_tcp, 4); + tcp_err(pcb, err_tcp); +} + +/** + * Accept callback function for TCP netconns. + * Allocates a new netconn and posts that to conn->acceptmbox. + * + * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value + */ +static err_t +accept_function(void *arg, struct tcp_pcb *newpcb, err_t err) +{ + struct netconn *newconn; + struct netconn *conn = (struct netconn *)arg; + + LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->tate: %s\n", tcp_debug_state_str(newpcb->state))); + + if (!sys_mbox_valid(&conn->acceptmbox)) { + LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n")); + return ERR_VAL; + } + + /* We have to set the callback here even though + * the new socket is unknown. conn->socket is marked as -1. */ + newconn = netconn_alloc(conn->type, conn->callback); + if (newconn == NULL) { + return ERR_MEM; + } + newconn->pcb.tcp = newpcb; + setup_tcp(newconn); + /* no protection: when creating the pcb, the netconn is not yet known + to the application thread */ + newconn->last_err = err; + + if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) { + /* When returning != ERR_OK, the pcb is aborted in tcp_process(), + so do nothing here! */ + newconn->pcb.tcp = NULL; + /* no need to drain since we know the recvmbox is empty. */ + sys_mbox_free(&newconn->recvmbox); + sys_mbox_set_invalid(&newconn->recvmbox); + netconn_free(newconn); + return ERR_MEM; + } else { + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Create a new pcb of a specific type. + * Called from do_newconn(). + * + * @param msg the api_msg_msg describing the connection type + * @return msg->conn->err, but the return value is currently ignored + */ +static void +pcb_new(struct api_msg_msg *msg) +{ + LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL); + + /* Allocate a PCB for this connection */ + switch(NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->pcb.raw = raw_new(msg->msg.n.proto); + if(msg->conn->pcb.raw == NULL) { + msg->err = ERR_MEM; + break; + } + raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->conn->pcb.udp = udp_new(); + if(msg->conn->pcb.udp == NULL) { + msg->err = ERR_MEM; + break; + } +#if LWIP_UDPLITE + if (msg->conn->type==NETCONN_UDPLITE) { + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE); + } +#endif /* LWIP_UDPLITE */ + if (msg->conn->type==NETCONN_UDPNOCHKSUM) { + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + } + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->pcb.tcp = tcp_new(); + if(msg->conn->pcb.tcp == NULL) { + msg->err = ERR_MEM; + break; + } + setup_tcp(msg->conn); + break; +#endif /* LWIP_TCP */ + default: + /* Unsupported netconn type, e.g. protocol disabled */ + msg->err = ERR_VAL; + break; + } +} + +/** + * Create a new pcb of a specific type inside a netconn. + * Called from netconn_new_with_proto_and_callback. + * + * @param msg the api_msg_msg describing the connection type + */ +void +do_newconn(struct api_msg_msg *msg) +{ + msg->err = ERR_OK; + if(msg->conn->pcb.tcp == NULL) { + pcb_new(msg); + } + /* Else? This "new" connection already has a PCB allocated. */ + /* Is this an error condition? Should it be deleted? */ + /* We currently just are happy and return. */ + + TCPIP_APIMSG_ACK(msg); +} + +/** + * Create a new netconn (of a specific type) that has a callback function. + * The corresponding pcb is NOT created! + * + * @param t the type of 'connection' to create (@see enum netconn_type) + * @param proto the IP protocol for RAW IP pcbs + * @param callback a function to call on status changes (RX available, TX'ed) + * @return a newly allocated struct netconn or + * NULL on memory error + */ +struct netconn* +netconn_alloc(enum netconn_type t, netconn_callback callback) +{ + struct netconn *conn; + int size; + + conn = (struct netconn *)memp_malloc(MEMP_NETCONN); + if (conn == NULL) { + return NULL; + } + + conn->last_err = ERR_OK; + conn->type = t; + conn->pcb.tcp = NULL; + +#if (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_UDP_RECVMBOX_SIZE) && \ + (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_TCP_RECVMBOX_SIZE) + size = DEFAULT_RAW_RECVMBOX_SIZE; +#else + switch(NETCONNTYPE_GROUP(t)) { +#if LWIP_RAW + case NETCONN_RAW: + size = DEFAULT_RAW_RECVMBOX_SIZE; + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + size = DEFAULT_UDP_RECVMBOX_SIZE; + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + size = DEFAULT_TCP_RECVMBOX_SIZE; + break; +#endif /* LWIP_TCP */ + default: + LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0); + break; + } +#endif + + if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) { + memp_free(MEMP_NETCONN, conn); + return NULL; + } + if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) { + sys_sem_free(&conn->op_completed); + memp_free(MEMP_NETCONN, conn); + return NULL; + } + +#if LWIP_TCP + sys_mbox_set_invalid(&conn->acceptmbox); +#endif + conn->state = NETCONN_NONE; +#if LWIP_SOCKET + /* initialize socket to -1 since 0 is a valid socket */ + conn->socket = -1; +#endif /* LWIP_SOCKET */ + conn->callback = callback; +#if LWIP_TCP + conn->current_msg = NULL; + conn->write_offset = 0; +#endif /* LWIP_TCP */ +#if LWIP_SO_RCVTIMEO + conn->recv_timeout = 0; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + conn->recv_bufsize = RECV_BUFSIZE_DEFAULT; + conn->recv_avail = 0; +#endif /* LWIP_SO_RCVBUF */ + conn->flags = 0; + return conn; +} + +/** + * Delete a netconn and all its resources. + * The pcb is NOT freed (since we might not be in the right thread context do this). + * + * @param conn the netconn to free + */ +void +netconn_free(struct netconn *conn) +{ + LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL); + LWIP_ASSERT("recvmbox must be deallocated before calling this function", + !sys_mbox_valid(&conn->recvmbox)); +#if LWIP_TCP + LWIP_ASSERT("acceptmbox must be deallocated before calling this function", + !sys_mbox_valid(&conn->acceptmbox)); +#endif /* LWIP_TCP */ + + sys_sem_free(&conn->op_completed); + sys_sem_set_invalid(&conn->op_completed); + + memp_free(MEMP_NETCONN, conn); +} + +/** + * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in + * these mboxes + * + * @param conn the netconn to free + * @bytes_drained bytes drained from recvmbox + * @accepts_drained pending connections drained from acceptmbox + */ +static void +netconn_drain(struct netconn *conn) +{ + void *mem; +#if LWIP_TCP + struct pbuf *p; +#endif /* LWIP_TCP */ + + /* This runs in tcpip_thread, so we don't need to lock against rx packets */ + + /* Delete and drain the recvmbox. */ + if (sys_mbox_valid(&conn->recvmbox)) { + while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) { +#if LWIP_TCP + if (conn->type == NETCONN_TCP) { + if(mem != NULL) { + p = (struct pbuf*)mem; + /* pcb might be set to NULL already by err_tcp() */ + if (conn->pcb.tcp != NULL) { + tcp_recved(conn->pcb.tcp, p->tot_len); + } + pbuf_free(p); + } + } else +#endif /* LWIP_TCP */ + { + netbuf_delete((struct netbuf *)mem); + } + } + sys_mbox_free(&conn->recvmbox); + sys_mbox_set_invalid(&conn->recvmbox); + } + + /* Delete and drain the acceptmbox. */ +#if LWIP_TCP + if (sys_mbox_valid(&conn->acceptmbox)) { + while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) { + struct netconn *newconn = (struct netconn *)mem; + /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */ + /* pcb might be set to NULL already by err_tcp() */ + if (conn->pcb.tcp != NULL) { + tcp_accepted(conn->pcb.tcp); + } + /* drain recvmbox */ + netconn_drain(newconn); + if (newconn->pcb.tcp != NULL) { + tcp_abort(newconn->pcb.tcp); + newconn->pcb.tcp = NULL; + } + netconn_free(newconn); + } + sys_mbox_free(&conn->acceptmbox); + sys_mbox_set_invalid(&conn->acceptmbox); + } +#endif /* LWIP_TCP */ +} + +#if LWIP_TCP +/** + * Internal helper function to close a TCP netconn: since this sometimes + * doesn't work at the first attempt, this function is called from multiple + * places. + * + * @param conn the TCP netconn to close + */ +static void +do_close_internal(struct netconn *conn) +{ + err_t err; + u8_t shut, shut_rx, shut_tx, close; + + LWIP_ASSERT("invalid conn", (conn != NULL)); + LWIP_ASSERT("this is for tcp netconns only", (conn->type == NETCONN_TCP)); + LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE)); + LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL)); + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + + shut = conn->current_msg->msg.sd.shut; + shut_rx = shut & NETCONN_SHUT_RD; + shut_tx = shut & NETCONN_SHUT_WR; + /* shutting down both ends is the same as closing */ + close = shut == NETCONN_SHUT_RDWR; + + /* Set back some callback pointers */ + if (close) { + tcp_arg(conn->pcb.tcp, NULL); + } + if (conn->pcb.tcp->state == LISTEN) { + tcp_accept(conn->pcb.tcp, NULL); + } else { + /* some callbacks have to be reset if tcp_close is not successful */ + if (shut_rx) { + tcp_recv(conn->pcb.tcp, NULL); + tcp_accept(conn->pcb.tcp, NULL); + } + if (shut_tx) { + tcp_sent(conn->pcb.tcp, NULL); + } + if (close) { + tcp_poll(conn->pcb.tcp, NULL, 4); + tcp_err(conn->pcb.tcp, NULL); + } + } + /* Try to close the connection */ + if (shut == NETCONN_SHUT_RDWR) { + err = tcp_close(conn->pcb.tcp); + } else { + err = tcp_shutdown(conn->pcb.tcp, shut & NETCONN_SHUT_RD, shut & NETCONN_SHUT_WR); + } + if (err == ERR_OK) { + /* Closing succeeded */ + conn->current_msg->err = ERR_OK; + conn->current_msg = NULL; + conn->state = NETCONN_NONE; + /* Set back some callback pointers as conn is going away */ + conn->pcb.tcp = NULL; + /* Trigger select() in socket layer. Make sure everybody notices activity + on the connection, error first! */ + if (close) { + API_EVENT(conn, NETCONN_EVT_ERROR, 0); + } + if (shut_rx) { + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + if (shut_tx) { + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + } + /* wake up the application task */ + sys_sem_signal(&conn->op_completed); + } else { + /* Closing failed, restore some of the callbacks */ + /* Closing of listen pcb will never fail! */ + LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state != LISTEN)); + tcp_sent(conn->pcb.tcp, sent_tcp); + tcp_poll(conn->pcb.tcp, poll_tcp, 4); + tcp_err(conn->pcb.tcp, err_tcp); + tcp_arg(conn->pcb.tcp, conn); + /* don't restore recv callback: we don't want to receive any more data */ + } + /* If closing didn't succeed, we get called again either + from poll_tcp or from sent_tcp */ +} +#endif /* LWIP_TCP */ + +/** + * Delete the pcb inside a netconn. + * Called from netconn_delete. + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_delconn(struct api_msg_msg *msg) +{ + /* @todo TCP: abort running write/connect? */ + if ((msg->conn->state != NETCONN_NONE) && + (msg->conn->state != NETCONN_LISTEN) && + (msg->conn->state != NETCONN_CONNECT)) { + /* this only happens for TCP netconns */ + LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP); + msg->err = ERR_INPROGRESS; + } else { + LWIP_ASSERT("blocking connect in progress", + (msg->conn->state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn)); + /* Drain and delete mboxes */ + netconn_drain(msg->conn); + + if (msg->conn->pcb.tcp != NULL) { + + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + raw_remove(msg->conn->pcb.raw); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->conn->pcb.udp->recv_arg = NULL; + udp_remove(msg->conn->pcb.udp); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL && + msg->conn->write_offset == 0); + msg->conn->state = NETCONN_CLOSE; + msg->msg.sd.shut = NETCONN_SHUT_RDWR; + msg->conn->current_msg = msg; + do_close_internal(msg->conn); + /* API_EVENT is called inside do_close_internal, before releasing + the application thread, so we can return at this point! */ + return; +#endif /* LWIP_TCP */ + default: + break; + } + msg->conn->pcb.tcp = NULL; + } + /* tcp netconns don't come here! */ + + /* @todo: this lets select make the socket readable and writable, + which is wrong! errfd instead? */ + API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0); + API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0); + } + if (sys_sem_valid(&msg->conn->op_completed)) { + sys_sem_signal(&msg->conn->op_completed); + } +} + +/** + * Bind a pcb contained in a netconn + * Called from netconn_bind. + * + * @param msg the api_msg_msg pointing to the connection and containing + * the IP address and port to bind to + */ +void +do_bind(struct api_msg_msg *msg) +{ + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + msg->err = ERR_VAL; + if (msg->conn->pcb.tcp != NULL) { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + msg->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port); + break; +#endif /* LWIP_TCP */ + default: + break; + } + } + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * TCP callback function if a connection (opened by tcp_connect/do_connect) has + * been established (or reset by the remote host). + * + * @see tcp.h (struct tcp_pcb.connected) for parameters and return values + */ +static err_t +do_connected(void *arg, struct tcp_pcb *pcb, err_t err) +{ + struct netconn *conn; + int was_blocking; + + LWIP_UNUSED_ARG(pcb); + + conn = (struct netconn *)arg; + + if (conn == NULL) { + return ERR_VAL; + } + + LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT); + LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect", + (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn)); + + if (conn->current_msg != NULL) { + conn->current_msg->err = err; + } + if ((conn->type == NETCONN_TCP) && (err == ERR_OK)) { + setup_tcp(conn); + } + was_blocking = !IN_NONBLOCKING_CONNECT(conn); + SET_NONBLOCKING_CONNECT(conn, 0); + conn->current_msg = NULL; + conn->state = NETCONN_NONE; + if (!was_blocking) { + NETCONN_SET_SAFE_ERR(conn, ERR_OK); + } + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + + if (was_blocking) { + sys_sem_signal(&conn->op_completed); + } + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Connect a pcb contained inside a netconn + * Called from netconn_connect. + * + * @param msg the api_msg_msg pointing to the connection and containing + * the IP address and port to connect to + */ +void +do_connect(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.tcp == NULL) { + /* This may happen when calling netconn_connect() a second time */ + msg->err = ERR_CLSD; + } else { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + msg->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + /* Prevent connect while doing any other action. */ + if (msg->conn->state != NETCONN_NONE) { + msg->err = ERR_ISCONN; + } else { + setup_tcp(msg->conn); + msg->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, + msg->msg.bc.port, do_connected); + if (msg->err == ERR_OK) { + u8_t non_blocking = netconn_is_nonblocking(msg->conn); + msg->conn->state = NETCONN_CONNECT; + SET_NONBLOCKING_CONNECT(msg->conn, non_blocking); + if (non_blocking) { + msg->err = ERR_INPROGRESS; + } else { + msg->conn->current_msg = msg; + /* sys_sem_signal() is called from do_connected (or err_tcp()), + * when the connection is established! */ + return; + } + } + } + break; +#endif /* LWIP_TCP */ + default: + LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0)); + break; + } + } + sys_sem_signal(&msg->conn->op_completed); +} + +/** + * Connect a pcb contained inside a netconn + * Only used for UDP netconns. + * Called from netconn_disconnect. + * + * @param msg the api_msg_msg pointing to the connection to disconnect + */ +void +do_disconnect(struct api_msg_msg *msg) +{ +#if LWIP_UDP + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) { + udp_disconnect(msg->conn->pcb.udp); + msg->err = ERR_OK; + } else +#endif /* LWIP_UDP */ + { + msg->err = ERR_VAL; + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * Set a TCP pcb contained in a netconn into listen mode + * Called from netconn_listen. + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_listen(struct api_msg_msg *msg) +{ + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + msg->err = ERR_CONN; + if (msg->conn->pcb.tcp != NULL) { + if (msg->conn->type == NETCONN_TCP) { + if (msg->conn->state == NETCONN_NONE) { +#if TCP_LISTEN_BACKLOG + struct tcp_pcb* lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog); +#else /* TCP_LISTEN_BACKLOG */ + struct tcp_pcb* lpcb = tcp_listen(msg->conn->pcb.tcp); +#endif /* TCP_LISTEN_BACKLOG */ + if (lpcb == NULL) { + /* in this case, the old pcb is still allocated */ + msg->err = ERR_MEM; + } else { + /* delete the recvmbox and allocate the acceptmbox */ + if (sys_mbox_valid(&msg->conn->recvmbox)) { + /** @todo: should we drain the recvmbox here? */ + sys_mbox_free(&msg->conn->recvmbox); + sys_mbox_set_invalid(&msg->conn->recvmbox); + } + msg->err = ERR_OK; + if (!sys_mbox_valid(&msg->conn->acceptmbox)) { + msg->err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE); + } + if (msg->err == ERR_OK) { + msg->conn->state = NETCONN_LISTEN; + msg->conn->pcb.tcp = lpcb; + tcp_arg(msg->conn->pcb.tcp, msg->conn); + tcp_accept(msg->conn->pcb.tcp, accept_function); + } else { + /* since the old pcb is already deallocated, free lpcb now */ + tcp_close(lpcb); + msg->conn->pcb.tcp = NULL; + } + } + } + } + } + } + TCPIP_APIMSG_ACK(msg); +} +#endif /* LWIP_TCP */ + +/** + * Send some data on a RAW or UDP pcb contained in a netconn + * Called from netconn_send + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_send(struct api_msg_msg *msg) +{ + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + msg->err = ERR_CONN; + if (msg->conn->pcb.tcp != NULL) { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + if (ip_addr_isany(&msg->msg.b->addr)) { + msg->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p); + } else { + msg->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr); + } + break; +#endif +#if LWIP_UDP + case NETCONN_UDP: +#if LWIP_CHECKSUM_ON_COPY + if (ip_addr_isany(&msg->msg.b->addr)) { + msg->err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p, + msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum); + } else { + msg->err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p, + &msg->msg.b->addr, msg->msg.b->port, + msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum); + } +#else /* LWIP_CHECKSUM_ON_COPY */ + if (ip_addr_isany(&msg->msg.b->addr)) { + msg->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p); + } else { + msg->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port); + } +#endif /* LWIP_CHECKSUM_ON_COPY */ + break; +#endif /* LWIP_UDP */ + default: + break; + } + } + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * Indicate data has been received from a TCP pcb contained in a netconn + * Called from netconn_recv + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_recv(struct api_msg_msg *msg) +{ + msg->err = ERR_OK; + if (msg->conn->pcb.tcp != NULL) { + if (msg->conn->type == NETCONN_TCP) { +#if TCP_LISTEN_BACKLOG + if (msg->conn->pcb.tcp->state == LISTEN) { + tcp_accepted(msg->conn->pcb.tcp); + } else +#endif /* TCP_LISTEN_BACKLOG */ + { + u32_t remaining = msg->msg.r.len; + do { + u16_t recved = (remaining > 0xffff) ? 0xffff : (u16_t)remaining; + tcp_recved(msg->conn->pcb.tcp, recved); + remaining -= recved; + }while(remaining != 0); + } + } + } + TCPIP_APIMSG_ACK(msg); +} + +/** + * See if more data needs to be written from a previous call to netconn_write. + * Called initially from do_write. If the first call can't send all data + * (because of low memory or empty send-buffer), this function is called again + * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the + * blocking application thread (waiting in netconn_write) is released. + * + * @param conn netconn (that is currently in state NETCONN_WRITE) to process + * @return ERR_OK + * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished + */ +static err_t +do_writemore(struct netconn *conn) +{ + err_t err = ERR_OK; + void *dataptr; + u16_t len, available; + u8_t write_finished = 0; + size_t diff; + u8_t dontblock = netconn_is_nonblocking(conn) || + (conn->current_msg->msg.w.apiflags & NETCONN_DONTBLOCK); + u8_t apiflags = conn->current_msg->msg.w.apiflags; + + LWIP_ASSERT("conn != NULL", conn != NULL); + LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE)); + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL); + LWIP_ASSERT("conn->write_offset < conn->current_msg->msg.w.len", + conn->write_offset < conn->current_msg->msg.w.len); + + dataptr = (u8_t*)conn->current_msg->msg.w.dataptr + conn->write_offset; + diff = conn->current_msg->msg.w.len - conn->write_offset; + if (diff > 0xffffUL) { /* max_u16_t */ + len = 0xffff; +#if LWIP_TCPIP_CORE_LOCKING + conn->flags |= NETCONN_FLAG_WRITE_DELAYED; +#endif + apiflags |= TCP_WRITE_FLAG_MORE; + } else { + len = (u16_t)diff; + } + available = tcp_sndbuf(conn->pcb.tcp); + if (available < len) { + /* don't try to write more than sendbuf */ + len = available; +#if LWIP_TCPIP_CORE_LOCKING + conn->flags |= NETCONN_FLAG_WRITE_DELAYED; +#endif + apiflags |= TCP_WRITE_FLAG_MORE; + } + if (dontblock && (len < conn->current_msg->msg.w.len)) { + /* failed to send all data at once -> nonblocking write not possible */ + err = ERR_MEM; + } + if (err == ERR_OK) { + LWIP_ASSERT("do_writemore: invalid length!", ((conn->write_offset + len) <= conn->current_msg->msg.w.len)); + err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags); + } + if (dontblock && (err == ERR_MEM)) { + /* nonblocking write failed */ + write_finished = 1; + err = ERR_WOULDBLOCK; + /* let poll_tcp check writable space to mark the pcb + writable again */ + conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE; + /* let select mark this pcb as non-writable. */ + API_EVENT(conn, NETCONN_EVT_SENDMINUS, len); + } else { + /* if OK or memory error, check available space */ + if (((err == ERR_OK) || (err == ERR_MEM)) && + ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) || + (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT))) { + /* The queued byte- or pbuf-count exceeds the configured low-water limit, + let select mark this pcb as non-writable. */ + API_EVENT(conn, NETCONN_EVT_SENDMINUS, len); + } + + if (err == ERR_OK) { + conn->write_offset += len; + if (conn->write_offset == conn->current_msg->msg.w.len) { + /* everything was written */ + write_finished = 1; + conn->write_offset = 0; + } + tcp_output(conn->pcb.tcp); + } else if (err == ERR_MEM) { + /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called + we do NOT return to the application thread, since ERR_MEM is + only a temporary error! */ + + /* tcp_write returned ERR_MEM, try tcp_output anyway */ + tcp_output(conn->pcb.tcp); + + #if LWIP_TCPIP_CORE_LOCKING + conn->flags |= NETCONN_FLAG_WRITE_DELAYED; + #endif + } else { + /* On errors != ERR_MEM, we don't try writing any more but return + the error to the application thread. */ + write_finished = 1; + } + } + + if (write_finished) { + /* everything was written: set back connection state + and back to application task */ + conn->current_msg->err = err; + conn->current_msg = NULL; + conn->state = NETCONN_NONE; +#if LWIP_TCPIP_CORE_LOCKING + if ((conn->flags & NETCONN_FLAG_WRITE_DELAYED) != 0) +#endif + { + sys_sem_signal(&conn->op_completed); + } + } +#if LWIP_TCPIP_CORE_LOCKING + else + return ERR_MEM; +#endif + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Send some data on a TCP pcb contained in a netconn + * Called from netconn_write + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_write(struct api_msg_msg *msg) +{ + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + if (msg->conn->type == NETCONN_TCP) { +#if LWIP_TCP + if (msg->conn->state != NETCONN_NONE) { + /* netconn is connecting, closing or in blocking write */ + msg->err = ERR_INPROGRESS; + } else if (msg->conn->pcb.tcp != NULL) { + msg->conn->state = NETCONN_WRITE; + /* set all the variables used by do_writemore */ + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL && + msg->conn->write_offset == 0); + LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0); + msg->conn->current_msg = msg; + msg->conn->write_offset = 0; +#if LWIP_TCPIP_CORE_LOCKING + msg->conn->flags &= ~NETCONN_FLAG_WRITE_DELAYED; + if (do_writemore(msg->conn) != ERR_OK) { + LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(&msg->conn->op_completed, 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + do_writemore(msg->conn); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + /* for both cases: if do_writemore was called, don't ACK the APIMSG + since do_writemore ACKs it! */ + return; + } else { + msg->err = ERR_CONN; + } +#else /* LWIP_TCP */ + msg->err = ERR_VAL; +#endif /* LWIP_TCP */ +#if (LWIP_UDP || LWIP_RAW) + } else { + msg->err = ERR_VAL; +#endif /* (LWIP_UDP || LWIP_RAW) */ + } + } + TCPIP_APIMSG_ACK(msg); +} + +/** + * Return a connection's local or remote address + * Called from netconn_getaddr + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_getaddr(struct api_msg_msg *msg) +{ + if (msg->conn->pcb.ip != NULL) { + *(msg->msg.ad.ipaddr) = (msg->msg.ad.local ? msg->conn->pcb.ip->local_ip : + msg->conn->pcb.ip->remote_ip); + + msg->err = ERR_OK; + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + if (msg->msg.ad.local) { + *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol; + } else { + /* return an error as connecting is only a helper for upper layers */ + msg->err = ERR_CONN; + } + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + if (msg->msg.ad.local) { + *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port; + } else { + if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) { + msg->err = ERR_CONN; + } else { + *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port; + } + } + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port); + break; +#endif /* LWIP_TCP */ + default: + LWIP_ASSERT("invalid netconn_type", 0); + break; + } + } else { + msg->err = ERR_CONN; + } + TCPIP_APIMSG_ACK(msg); +} + +/** + * Close a TCP pcb contained in a netconn + * Called from netconn_close + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_close(struct api_msg_msg *msg) +{ +#if LWIP_TCP + /* @todo: abort running write/connect? */ + if ((msg->conn->state != NETCONN_NONE) && (msg->conn->state != NETCONN_LISTEN)) { + /* this only happens for TCP netconns */ + LWIP_ASSERT("msg->conn->type == NETCONN_TCP", msg->conn->type == NETCONN_TCP); + msg->err = ERR_INPROGRESS; + } else if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) { + if ((msg->msg.sd.shut != NETCONN_SHUT_RDWR) && (msg->conn->state == NETCONN_LISTEN)) { + /* LISTEN doesn't support half shutdown */ + msg->err = ERR_CONN; + } else { + if (msg->msg.sd.shut & NETCONN_SHUT_RD) { + /* Drain and delete mboxes */ + netconn_drain(msg->conn); + } + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL && + msg->conn->write_offset == 0); + msg->conn->state = NETCONN_CLOSE; + msg->conn->current_msg = msg; + do_close_internal(msg->conn); + /* for tcp netconns, do_close_internal ACKs the message */ + return; + } + } else +#endif /* LWIP_TCP */ + { + msg->err = ERR_VAL; + } + sys_sem_signal(&msg->conn->op_completed); +} + +#if LWIP_IGMP +/** + * Join multicast groups for UDP netconns. + * Called from netconn_join_leave_group + * + * @param msg the api_msg_msg pointing to the connection + */ +void +do_join_leave_group(struct api_msg_msg *msg) +{ + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) { +#if LWIP_UDP + if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { + msg->err = igmp_joingroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr); + } else { + msg->err = igmp_leavegroup(msg->msg.jl.netif_addr, msg->msg.jl.multiaddr); + } +#endif /* LWIP_UDP */ +#if (LWIP_TCP || LWIP_RAW) + } else { + msg->err = ERR_VAL; +#endif /* (LWIP_TCP || LWIP_RAW) */ + } + } else { + msg->err = ERR_CONN; + } + } + TCPIP_APIMSG_ACK(msg); +} +#endif /* LWIP_IGMP */ + +#if LWIP_DNS +/** + * Callback function that is called when DNS name is resolved + * (or on timeout). A waiting application thread is waked up by + * signaling the semaphore. + */ +static void +do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg) +{ + struct dns_api_msg *msg = (struct dns_api_msg*)arg; + + LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0); + LWIP_UNUSED_ARG(name); + + if (ipaddr == NULL) { + /* timeout or memory error */ + *msg->err = ERR_VAL; + } else { + /* address was resolved */ + *msg->err = ERR_OK; + *msg->addr = *ipaddr; + } + /* wake up the application task waiting in netconn_gethostbyname */ + sys_sem_signal(msg->sem); +} + +/** + * Execute a DNS query + * Called from netconn_gethostbyname + * + * @param arg the dns_api_msg pointing to the query + */ +void +do_gethostbyname(void *arg) +{ + struct dns_api_msg *msg = (struct dns_api_msg*)arg; + + *msg->err = dns_gethostbyname(msg->name, msg->addr, do_dns_found, msg); + if (*msg->err != ERR_INPROGRESS) { + /* on error or immediate success, wake up the application + * task waiting in netconn_gethostbyname */ + sys_sem_signal(msg->sem); + } +} +#endif /* LWIP_DNS */ + +#endif /* LWIP_NETCONN */ |