/** * Close a TCP pcb contained in a netconn * Called from netconn_close * * @param msg the api_msg_msg pointing to the connection */ void lwip_netconn_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("NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP", NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP); msg->err = ERR_INPROGRESS; } else if ((msg->conn->pcb.tcp != NULL) && (NETCONNTYPE_GROUP(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; lwip_netconn_do_close_internal(msg->conn); /* for tcp netconns, lwip_netconn_do_close_internal ACKs the message */ return; } } else #endif /* LWIP_TCP */ { msg->err = ERR_VAL; } sys_sem_signal(&msg->conn->op_completed); }
nsapi_error_t LWIP::socket_bind(nsapi_socket_t handle, const SocketAddress &address) { struct mbed_lwip_socket *s = (struct mbed_lwip_socket *)handle; ip_addr_t ip_addr; if ( #if LWIP_TCP (NETCONNTYPE_GROUP(s->conn->type) == NETCONN_TCP && s->conn->pcb.tcp->local_port != 0) || #endif (NETCONNTYPE_GROUP(s->conn->type) == NETCONN_UDP && s->conn->pcb.udp->local_port != 0)) { return NSAPI_ERROR_PARAMETER; } nsapi_addr_t addr = address.get_addr(); if (!convert_mbed_addr_to_lwip(&ip_addr, &addr)) { return NSAPI_ERROR_PARAMETER; } if (!ip_addr_isany_val(ip_addr) && !is_local_addr(&ip_addr)) { return NSAPI_ERROR_PARAMETER; } err_t err = netconn_bind(s->conn, &ip_addr, address.get_port()); return err_remap(err); }
/** * Delete the pcb inside a netconn. * Called from netconn_delete. * * @param msg the api_msg_msg pointing to the connection */ void lwip_netconn_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("NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP", NETCONNTYPE_GROUP(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; lwip_netconn_do_close_internal(msg->conn); /* API_EVENT is called inside lwip_netconn_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); } }
/** * 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 lwip_netconn_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; if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { /* For TCP, netconn_connect() calls tcpip_apimsg(), so signal op_completed here. */ sys_sem_signal(&msg->conn->op_completed); return; } } else { switch (NETCONNTYPE_GROUP(msg->conn->type)) { #if LWIP_RAW case NETCONN_RAW: msg->err = raw_connect(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr)); break; #endif /* LWIP_RAW */ #if LWIP_UDP case NETCONN_UDP: msg->err = udp_connect(msg->conn->pcb.udp, API_EXPR_REF(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, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port, lwip_netconn_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 lwip_netconn_do_connected (or err_tcp()), * when the connection is established! */ return; } } } /* For TCP, netconn_connect() calls tcpip_apimsg(), so signal op_completed here. */ sys_sem_signal(&msg->conn->op_completed); return; #endif /* LWIP_TCP */ default: LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0)); break; } } /* For all other protocols, netconn_connect() calls TCPIP_APIMSG(), so use TCPIP_APIMSG_ACK() here. */ TCPIP_APIMSG_ACK(msg); }
/** * 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) { sys_sem_signal(msg->conn->op_completed); return; } switch (NETCONNTYPE_GROUP(msg->conn->type)) { #if LWIP_RAW case NETCONN_RAW: msg->conn->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr); sys_sem_signal(msg->conn->op_completed); break; #endif /* LWIP_RAW */ #if LWIP_UDP case NETCONN_UDP: msg->conn->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port); sys_sem_signal(msg->conn->op_completed); break; #endif /* LWIP_UDP */ #if LWIP_TCP case NETCONN_TCP: msg->conn->state = NETCONN_CONNECT; setup_tcp(msg->conn); msg->conn->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port, do_connected); /* sys_sem_signal() is called from do_connected (or err_tcp()), * when the connection is established! */ break; #endif /* LWIP_TCP */ default: break; } }
/** * 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 lwip_netconn_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 (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { if (msg->conn->state == NETCONN_NONE) { struct tcp_pcb* lpcb; #if LWIP_IPV6 if ((msg->conn->flags & NETCONN_FLAG_IPV6_V6ONLY) == 0) { #if TCP_LISTEN_BACKLOG lpcb = tcp_listen_dual_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog); #else /* TCP_LISTEN_BACKLOG */ lpcb = tcp_listen_dual(msg->conn->pcb.tcp); #endif /* TCP_LISTEN_BACKLOG */ } else #endif /* LWIP_IPV6 */ { #if TCP_LISTEN_BACKLOG lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog); #else /* TCP_LISTEN_BACKLOG */ 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; } } } } else { msg->err = ERR_ARG; } } } TCPIP_APIMSG_ACK(msg); }
/** * 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); }
/** * 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->err)) { if (msg->conn->pcb.tcp != NULL) { switch (NETCONNTYPE_GROUP(msg->conn->type)) { #if LWIP_RAW case NETCONN_RAW: if (msg->msg.b->addr == NULL) { msg->conn->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p); } else { msg->conn->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, msg->msg.b->addr); } break; #endif #if LWIP_UDP case NETCONN_UDP: if (msg->msg.b->addr == NULL) { msg->conn->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p); } else { msg->conn->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, msg->msg.b->addr, msg->msg.b->port); } break; #endif /* LWIP_UDP */ default: break; } } } TCPIP_APIMSG_ACK(msg); }
/** * 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); }
/** * Return a connection's local or remote address * Called from netconn_getaddr * * @param msg the api_msg_msg pointing to the connection */ void lwip_netconn_do_getaddr(struct api_msg_msg *msg) { if (msg->conn->pcb.ip != NULL) { if (msg->msg.ad.local) { ipX_addr_copy(PCB_ISIPV6(msg->conn->pcb.ip), API_EXPR_DEREF(msg->msg.ad.ipaddr), msg->conn->pcb.ip->local_ip); } else { ipX_addr_copy(PCB_ISIPV6(msg->conn->pcb.ip), API_EXPR_DEREF(msg->msg.ad.ipaddr), 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) { API_EXPR_DEREF(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) { API_EXPR_DEREF(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 { API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port; } } break; #endif /* LWIP_UDP */ #if LWIP_TCP case NETCONN_TCP: if ((msg->msg.ad.local == 0) && ((msg->conn->pcb.tcp->state == CLOSED) || (msg->conn->pcb.tcp->state == LISTEN))) { /* pcb is not connected and remote name is requested */ msg->err = ERR_CONN; } else { API_EXPR_DEREF(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); }
/** * 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 (NETCONNTYPE_GROUP(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 */ }
/** * 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); } #endif /* LWIP_UDP */ TCPIP_APIMSG_ACK(msg); }
/** * 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->err)) { if (msg->conn->pcb.tcp != NULL) { //[MS_CHANGE] - make sure we are binding to a valid address u8_t validAddr = ip_addr_isany(msg->msg.bc.ipaddr); if(!validAddr) { struct netif *netif; for(netif = netif_list; netif != NULL; netif = netif->next) { /* network mask matches? */ if (netif_is_up(netif)) { if(ip_addr_cmp(msg->msg.bc.ipaddr, &netif->ip_addr)) { validAddr = 1; break; } } } } //[MS_CHANGE] - make sure we are binding to a valid address if(validAddr) { switch (NETCONNTYPE_GROUP(msg->conn->type)) { #if LWIP_RAW case NETCONN_RAW: msg->conn->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr); break; #endif /* LWIP_RAW */ #if LWIP_UDP case NETCONN_UDP: msg->conn->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->conn->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port); break; #endif /* LWIP_TCP */ default: break; } } else { msg->conn->err = ERR_VAL; } } else { /* msg->conn->pcb is NULL */ msg->conn->err = ERR_VAL; } } TCPIP_APIMSG_ACK(msg); }
/** * 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_WOULDBLOCK/*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); }
/** * 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 lwip_netconn_do_write(struct api_msg_msg *msg) { if (ERR_IS_FATAL(msg->conn->last_err)) { msg->err = msg->conn->last_err; } else { if (NETCONNTYPE_GROUP(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 lwip_netconn_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 (lwip_netconn_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 */ lwip_netconn_do_writemore(msg->conn); #endif /* LWIP_TCPIP_CORE_LOCKING */ /* for both cases: if lwip_netconn_do_writemore was called, don't ACK the APIMSG since lwip_netconn_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); }
/** * 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) { sys_sem_signal(msg->conn->op_completed); return; } switch (NETCONNTYPE_GROUP(msg->conn->type)) { #if LWIP_RAW case NETCONN_RAW: msg->conn->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr); sys_sem_signal(msg->conn->op_completed); break; #endif /* LWIP_RAW */ #if LWIP_UDP case NETCONN_UDP: msg->conn->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port); sys_sem_signal(msg->conn->op_completed); break; #endif /* LWIP_UDP */ #if LWIP_TCP case NETCONN_TCP: msg->conn->state = NETCONN_CONNECT; setup_tcp(msg->conn); msg->conn->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port, do_connected); // [MS_CHANGE] - Make the connect be asynchronous by returning ERR_INPROGRESS // and signalling operation complete. if(msg->conn->err == ERR_OK) { msg->conn->err = ERR_INPROGRESS; } sys_sem_signal(msg->conn->op_completed); /* sys_sem_signal() is called from do_connected (or err_tcp()), * when the connection is established! */ break; #endif /* LWIP_TCP */ default: LWIP_ERROR("Invalid netconn type", 0, do{ msg->conn->err = ERR_VAL; sys_sem_signal(msg->conn->op_completed); }while(0)); break; } }
/** * 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); }
/** * Join multicast groups for UDP netconns. * Called from netconn_join_leave_group * * @param msg the api_msg_msg pointing to the connection */ void lwip_netconn_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 LWIP_IPV6 && LWIP_IPV6_MLD if (PCB_ISIPV6(msg->conn->pcb.udp)) { if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { msg->err = mld6_joingroup(ipX_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)), ipX_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); } else { msg->err = mld6_leavegroup(ipX_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)), ipX_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); } } else #endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ { #if LWIP_IGMP if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { msg->err = igmp_joingroup(ipX_2_ip(API_EXPR_REF(msg->msg.jl.netif_addr)), ipX_2_ip(API_EXPR_REF(msg->msg.jl.multiaddr))); } else { msg->err = igmp_leavegroup(ipX_2_ip(API_EXPR_REF(msg->msg.jl.netif_addr)), ipX_2_ip(API_EXPR_REF(msg->msg.jl.multiaddr))); } #endif /* LWIP_IGMP */ } #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); }
/** * TCP callback function if a connection (opened by tcp_connect/lwip_netconn_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 lwip_netconn_do_connected(void *arg, struct tcp_pcb *pcb, err_t err) { struct netconn *conn; int was_blocking; sys_sem_t* op_completed_sem = NULL; 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; op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); } if ((NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) && (err == ERR_OK)) { setup_tcp(conn); } was_blocking = !IN_NONBLOCKING_CONNECT(conn); SET_NONBLOCKING_CONNECT(conn, 0); LWIP_ASSERT("blocking connect state error", (was_blocking && op_completed_sem != NULL) || (!was_blocking && op_completed_sem == NULL)); 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(op_completed_sem); } return ERR_OK; }
/** * 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) { 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: msg->conn->state = NETCONN_CLOSE; 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; } } /* tcp netconns don't come here! */ /* Trigger select() in socket layer. This send should something else so the errorfd is set, not the read and write fd! */ API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0); API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0); if (msg->conn->op_completed != SYS_SEM_NULL) { sys_sem_signal(msg->conn->op_completed); } }
/** * 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 lwip_netconn_do_recv(struct api_msg_msg *msg) { msg->err = ERR_OK; if (msg->conn->pcb.tcp != NULL) { if (NETCONNTYPE_GROUP(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); }
/** * 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); goto free_and_return; } #endif if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) { goto free_and_return; } if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) { sys_sem_free(&conn->op_completed); goto free_and_return; } #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_SNDTIMEO conn->send_timeout = 0; #endif /* LWIP_SO_SNDTIMEO */ #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; free_and_return: memp_free(MEMP_NETCONN, conn); return NULL; }
/** * 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! */ /* remove all references to this netconn from the pcb */ struct tcp_pcb* pcb = newconn->pcb.tcp; tcp_arg(pcb, NULL); tcp_recv(pcb, NULL); tcp_sent(pcb, NULL); tcp_poll(pcb, NULL, 4); tcp_err(pcb, NULL); /* remove reference from to the pcb from this netconn */ 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; } }
nsapi_error_t LWIP::setsockopt(nsapi_socket_t handle, int level, int optname, const void *optval, unsigned optlen) { struct mbed_lwip_socket *s = (struct mbed_lwip_socket *)handle; switch (optname) { case NSAPI_BIND_TO_DEVICE: if (optlen > NSAPI_INTERFACE_NAME_MAX_SIZE) { return NSAPI_ERROR_UNSUPPORTED; } if (NETCONNTYPE_GROUP(s->conn->type) == NETCONN_TCP) { s->conn->pcb.tcp->interface_name = (const char *)optval; } if (NETCONNTYPE_GROUP(s->conn->type) == NETCONN_UDP) { s->conn->pcb.udp->interface_name = (const char *)optval; } #if LWIP_RAW if (NETCONNTYPE_GROUP(s->conn->type) == NETCONN_RAW) { s->conn->pcb.raw->interface_name = (const char *)optval; } #endif return 0; #if LWIP_TCP case NSAPI_KEEPALIVE: if (optlen != sizeof(int) || NETCONNTYPE_GROUP(s->conn->type) != NETCONN_TCP) { return NSAPI_ERROR_UNSUPPORTED; } s->conn->pcb.tcp->so_options |= SOF_KEEPALIVE; return 0; case NSAPI_KEEPIDLE: if (optlen != sizeof(int) || NETCONNTYPE_GROUP(s->conn->type) != NETCONN_TCP) { return NSAPI_ERROR_UNSUPPORTED; } s->conn->pcb.tcp->keep_idle = *(int *)optval; return 0; case NSAPI_KEEPINTVL: if (optlen != sizeof(int) || NETCONNTYPE_GROUP(s->conn->type) != NETCONN_TCP) { return NSAPI_ERROR_UNSUPPORTED; } s->conn->pcb.tcp->keep_intvl = *(int *)optval; return 0; #endif case NSAPI_REUSEADDR: if (optlen != sizeof(int)) { return NSAPI_ERROR_UNSUPPORTED; } if (*(int *)optval) { ip_set_option(s->conn->pcb.ip, SOF_REUSEADDR); } else { ip_reset_option(s->conn->pcb.ip, SOF_REUSEADDR); } return 0; case NSAPI_ADD_MEMBERSHIP: case NSAPI_DROP_MEMBERSHIP: { if (optlen != sizeof(nsapi_ip_mreq_t)) { return NSAPI_ERROR_PARAMETER; } err_t igmp_err; const nsapi_ip_mreq_t *imr = static_cast<const nsapi_ip_mreq_t *>(optval); /* Check interface address type matches group, or is unspecified */ if (imr->imr_interface.version != NSAPI_UNSPEC && imr->imr_interface.version != imr->imr_multiaddr.version) { return NSAPI_ERROR_PARAMETER; } ip_addr_t if_addr; ip_addr_t multi_addr; /* Convert the group address */ if (!convert_mbed_addr_to_lwip(&multi_addr, &imr->imr_multiaddr)) { return NSAPI_ERROR_PARAMETER; } /* Convert the interface address, or make sure it's the correct sort of "any" */ if (imr->imr_interface.version != NSAPI_UNSPEC) { if (!convert_mbed_addr_to_lwip(&if_addr, &imr->imr_interface)) { return NSAPI_ERROR_PARAMETER; } } else { ip_addr_set_any(IP_IS_V6(&if_addr), &if_addr); } igmp_err = ERR_USE; // Maps to NSAPI_ERROR_UNSUPPORTED int32_t member_pair_index = find_multicast_member(s, imr); if (optname == NSAPI_ADD_MEMBERSHIP) { if (!s->multicast_memberships) { // First multicast join on this socket, allocate space for membership tracking s->multicast_memberships = (nsapi_ip_mreq_t *)malloc(sizeof(nsapi_ip_mreq_t) * LWIP_SOCKET_MAX_MEMBERSHIPS); if (!s->multicast_memberships) { return NSAPI_ERROR_NO_MEMORY; } } else if (s->multicast_memberships_count == LWIP_SOCKET_MAX_MEMBERSHIPS) { return NSAPI_ERROR_NO_MEMORY; } if (member_pair_index != -1) { return NSAPI_ERROR_ADDRESS_IN_USE; } member_pair_index = next_free_multicast_member(s, 0); adaptation.lock(); #if LWIP_IPV4 if (IP_IS_V4(&if_addr)) { igmp_err = igmp_joingroup(ip_2_ip4(&if_addr), ip_2_ip4(&multi_addr)); } #endif #if LWIP_IPV6 if (IP_IS_V6(&if_addr)) { igmp_err = mld6_joingroup(ip_2_ip6(&if_addr), ip_2_ip6(&multi_addr)); } #endif adaptation.unlock(); if (igmp_err == ERR_OK) { set_multicast_member_registry_bit(s, member_pair_index); s->multicast_memberships[member_pair_index] = *imr; s->multicast_memberships_count++; } } else { if (member_pair_index == -1) { return NSAPI_ERROR_NO_ADDRESS; } clear_multicast_member_registry_bit(s, member_pair_index); s->multicast_memberships_count--; adaptation.lock(); #if LWIP_IPV4 if (IP_IS_V4(&if_addr)) { igmp_err = igmp_leavegroup(ip_2_ip4(&if_addr), ip_2_ip4(&multi_addr)); } #endif #if LWIP_IPV6 if (IP_IS_V6(&if_addr)) { igmp_err = mld6_leavegroup(ip_2_ip6(&if_addr), ip_2_ip6(&multi_addr)); } #endif adaptation.unlock(); } return err_remap(igmp_err); } default: return NSAPI_ERROR_UNSUPPORTED; } }
/** * 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 lwip_netconn_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", (NETCONNTYPE_GROUP(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 (close) { err = tcp_close(conn->pcb.tcp); } else { err = tcp_shutdown(conn->pcb.tcp, shut_rx, shut_tx); } if (err == ERR_OK) { /* Closing succeeded */ conn->current_msg->err = ERR_OK; conn->current_msg = NULL; conn->state = NETCONN_NONE; if (close) { /* 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! */ 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 */ }
/** * 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 = memp_malloc(MEMP_NETCONN); if (conn == NULL) { return NULL; } conn->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 ((conn->op_completed = sys_sem_new(0)) == SYS_SEM_NULL) { memp_free(MEMP_NETCONN, conn); return NULL; } if ((conn->recvmbox = sys_mbox_new(size)) == SYS_MBOX_NULL) { sys_sem_free(conn->op_completed); memp_free(MEMP_NETCONN, conn); return NULL; } conn->acceptmbox = SYS_MBOX_NULL; conn->state = NETCONN_NONE; /* initialize socket to -1 since 0 is a valid socket */ conn->socket = -1; conn->callback = callback; conn->recv_avail = 0; #if LWIP_TCP conn->write_msg = NULL; conn->write_offset = 0; #if LWIP_TCPIP_CORE_LOCKING conn->write_delayed = 0; #endif /* LWIP_TCPIP_CORE_LOCKING */ #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; #endif /* LWIP_SO_RCVBUF */ return conn; }
/** * 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, struct ip_addr *addr) { struct pbuf *q; struct netbuf *buf; struct netconn *conn; #if LWIP_SO_RCVBUF int recv_avail; #endif /* LWIP_SO_RCVBUF */ LWIP_UNUSED_ARG(addr); conn = arg; #if LWIP_SO_RCVBUF SYS_ARCH_GET(conn->recv_avail, recv_avail); if ((conn != NULL) && (conn->recvmbox != SYS_MBOX_NULL) && ((recv_avail + (int)(p->tot_len)) <= conn->recv_bufsize)) { #else /* LWIP_SO_RCVBUF */ if ((conn != NULL) && (conn->recvmbox != SYS_MBOX_NULL)) { #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) { buf = memp_malloc(MEMP_NETBUF); if (buf == NULL) { pbuf_free(q); return 0; } buf->p = q; buf->ptr = q; buf->addr = &(((struct ip_hdr*)(q->payload))->src); buf->port = pcb->protocol; if (sys_mbox_trypost(conn->recvmbox, buf) != ERR_OK) { netbuf_delete(buf); return 0; } else { SYS_ARCH_INC(conn->recv_avail, q->tot_len); /* Register event with callback */ API_EVENT(conn, NETCONN_EVT_RCVPLUS, q->tot_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, struct ip_addr *addr, u16_t port) { struct netbuf *buf; struct netconn *conn; #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 = 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) || (conn->recvmbox == SYS_MBOX_NULL) || ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) { #else /* LWIP_SO_RCVBUF */ if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL)) { #endif /* LWIP_SO_RCVBUF */ pbuf_free(p); return; } buf = memp_malloc(MEMP_NETBUF); if (buf == NULL) { pbuf_free(p); return; } else { buf->p = p; buf->ptr = p; 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)); buf->toaddr = (struct ip_addr*)&iphdr->dest; buf->toport = udphdr->dest; } #endif /* LWIP_NETBUF_RECVINFO */ } if (sys_mbox_trypost(conn->recvmbox, buf) != ERR_OK) { netbuf_delete(buf); return; } else { SYS_ARCH_INC(conn->recv_avail, p->tot_len); /* Register event with callback */ API_EVENT(conn, NETCONN_EVT_RCVPLUS, p->tot_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 = arg; LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb); if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL)) { return ERR_VAL; } conn->err = err; if (p != NULL) { len = p->tot_len; SYS_ARCH_INC(conn->recv_avail, len); } else { len = 0; } if (sys_mbox_trypost(conn->recvmbox, p) != ERR_OK) { return ERR_MEM; } else { /* 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 = 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); } 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 = arg; LWIP_UNUSED_ARG(pcb); LWIP_ASSERT("conn != NULL", (conn != NULL)); if (conn->state == NETCONN_WRITE) { LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL); do_writemore(conn); } else if (conn->state == NETCONN_CLOSE) { do_close_internal(conn); } if (conn) { if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT)) { 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; conn = arg; LWIP_ASSERT("conn != NULL", (conn != NULL)); conn->pcb.tcp = NULL; conn->err = err; if (conn->recvmbox != SYS_MBOX_NULL) { /* Register event with callback */ API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); sys_mbox_post(conn->recvmbox, NULL); } if (conn->op_completed != SYS_SEM_NULL && conn->state == NETCONN_CONNECT) { conn->state = NETCONN_NONE; sys_sem_signal(conn->op_completed); } if (conn->acceptmbox != SYS_MBOX_NULL) { /* Register event with callback */ API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); sys_mbox_post(conn->acceptmbox, NULL); } if ((conn->state == NETCONN_WRITE) || (conn->state == NETCONN_CLOSE)) { /* calling do_writemore/do_close_internal is not necessary since the pcb has already been deleted! */ conn->state = NETCONN_NONE; /* wake up the waiting task */ sys_sem_signal(conn->op_completed); } } /** * 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; #if API_MSG_DEBUG #if TCP_DEBUG tcp_debug_print_state(newpcb->state); #endif /* TCP_DEBUG */ #endif /* API_MSG_DEBUG */ conn = (struct netconn *)arg; LWIP_ERROR("accept_function: invalid conn->acceptmbox", conn->acceptmbox != SYS_MBOX_NULL, 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); newconn->err = err; if (sys_mbox_trypost(conn->acceptmbox, newconn) != ERR_OK) { /* When returning != ERR_OK, the connection is aborted in tcp_process(), so do nothing here! */ newconn->pcb.tcp = NULL; 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 err_t pcb_new(struct api_msg_msg *msg) { msg->conn->err = ERR_OK; 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->conn->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->conn->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->conn->err = ERR_MEM; break; } setup_tcp(msg->conn); break; #endif /* LWIP_TCP */ default: /* Unsupported netconn type, e.g. protocol disabled */ msg->conn->err = ERR_VAL; break; } return msg->conn->err; }