Network Core Helpers¶
The network subsystem contains two functions for sending and receiving
data from the network. The
net_recv_data() is typically used by network
device driver when the received network data needs to be pushed up in the
network stack for further processing. All the data is received via a network
interface which is typically created by the device driver.
For sending, the
net_send_data() can be used. Typically applications do not
call this function directly as there is the BSD Sockets API
for sending and receiving network data.
Network core library.
net_recv_data(struct net_if *iface, struct net_pkt *pkt)¶
Called by lower network stack or network device driver when a network packet has been received. The function will push the packet up in the network stack for further processing.
iface – Network interface where the packet was received.
pkt – Network packet data.
0 if ok, <0 if error.
net_send_data(struct net_pkt *pkt)¶
Send data to network.
Send data to network. This should not be used normally by applications as it requires that the network packet is properly constructed.
pkt – Network packet.
0 if ok, <0 if error. If <0 is returned, then the caller needs to unref the pkt in order to avoid memory leak.