/**
* 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);
}
/**
* 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;
ipX_addr_copy(PCB_ISIPV6(pcb), buf->addr, *ipX_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 */
}
static void
pxdns_query(struct pxdns *pxdns, struct udp_pcb *pcb, struct pbuf *p,
ipX_addr_t *addr, u16_t port)
{
struct request *req;
int sent;
if (pxdns->nresolvers == 0) {
/* nothing we can do */
pbuf_free(p);
return;
}
req = calloc(1, sizeof(struct request) - 1 + p->tot_len);
if (req == NULL) {
pbuf_free(p);
return;
}
/* copy request data */
req->size = p->tot_len;
pbuf_copy_partial(p, req->data, p->tot_len, 0);
/* save client identity and client's request id */
req->pcb = pcb;
ipX_addr_copy(PCB_ISIPV6(pcb), req->client_addr, *addr);
req->client_port = port;
memcpy(&req->client_id, req->data, sizeof(req->client_id));
/* slap our request id onto it */
req->id = pxdns->id++;
memcpy(req->data, &req->id, sizeof(u16_t));
/* resolver to forward to */
req->generation = pxdns->generation;
req->residx = 0;
/* prepare for relaying the reply back to guest */
req->msg_reply.type = TCPIP_MSG_CALLBACK_STATIC;
req->msg_reply.sem = NULL;
req->msg_reply.msg.cb.function = pxdns_pcb_reply;
req->msg_reply.msg.cb.ctx = (void *)req;
DPRINTF2(("%s: req=%p: client id %d -> id %d\n",
__func__, (void *)req, req->client_id, req->id));
pxdns_request_register(pxdns, req);
sent = pxdns_forward_outbound(pxdns, req);
if (!sent) {
sent = pxdns_rexmit(pxdns, req);
}
if (!sent) {
pxdns_request_deregister(pxdns, req);
pxdns_request_free(req);
}
}
