/**
* Execute a DNS query
* Called from netconn_gethostbyname
*
* @param arg the dns_api_msg pointing to the query
*/
void
lwip_netconn_do_gethostbyname(void *arg)
{
struct dns_api_msg *msg = (struct dns_api_msg*)arg;
API_EXPR_DEREF(msg->err) = dns_gethostbyname(msg->name, API_EXPR_REF(msg->addr), lwip_netconn_do_dns_found, msg);
if (API_EXPR_DEREF(msg->err) != ERR_INPROGRESS) {
/* on error or immediate success, wake up the application
* task waiting in netconn_gethostbyname */
sys_sem_signal(API_EXPR_REF(msg->sem));
}
}
/**
* 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
lwip_netconn_do_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
{
struct dns_api_msg *msg = (struct dns_api_msg*)arg;
/* we trust the internal implementation to be correct :-) */
LWIP_UNUSED_ARG(name);
if (ipaddr == NULL) {
/* timeout or memory error */
API_EXPR_DEREF(msg->err) = ERR_VAL;
} else {
/* address was resolved */
API_EXPR_DEREF(msg->err) = ERR_OK;
API_EXPR_DEREF(msg->addr) = *ipaddr;
}
/* wake up the application task waiting in netconn_gethostbyname */
sys_sem_signal(API_EXPR_REF(msg->sem));
}
/**
* 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
lwip_netconn_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 */
API_EXPR_DEREF(msg->err) = ERR_VAL;
} else {
/* address was resolved */
API_EXPR_DEREF(msg->err) = ERR_OK;
API_EXPR_DEREF(msg->addr) = *ipaddr;
}
/* wake up the application task waiting in netconn_gethostbyname */
sys_sem_signal(API_EXPR_REF(msg->sem));
}
/**
* 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);
}
