void net_context_put(struct net_context *context)
{
if (!context) {
return;
}
nano_sem_take(&contexts_lock, TICKS_UNLIMITED);
if (context->tuple.ip_proto == IPPROTO_UDP) {
if (net_context_get_receiver_registered(context)) {
struct simple_udp_connection *udp =
net_context_get_udp_connection(context);
simple_udp_unregister(udp);
}
}
#ifdef CONFIG_NETWORKING_WITH_TCP
if (context->tcp_type == NET_TCP_TYPE_SERVER) {
tcp_unlisten(UIP_HTONS(context->tuple.local_port),
&context->tcp);
}
#endif
memset(&context->tuple, 0, sizeof(context->tuple));
memset(&context->udp, 0, sizeof(context->udp));
context->receiver_registered = false;
context_sem_give(&contexts_lock);
}
void net_context_init(void)
{
int i;
nano_sem_init(&contexts_lock);
memset(contexts, 0, sizeof(contexts));
for (i = 0; i < NET_MAX_CONTEXT; i++) {
nano_fifo_init(&contexts[i].rx_queue);
}
context_sem_give(&contexts_lock);
}
void net_context_put(struct net_context *context)
{
int i;
nano_sem_take_wait(&contexts_lock);
for (i = 0; i < NET_MAX_CONTEXT; i++) {
if (contexts[i].tuple.remote_port) {
memset(&contexts[i].tuple, 0,
sizeof(contexts[i].tuple));
break;
}
}
context_sem_give(&contexts_lock);
}
struct net_context *net_context_get(enum ip_protocol ip_proto,
const struct net_addr *remote_addr,
uint16_t remote_port,
struct net_addr *local_addr,
uint16_t local_port)
{
#ifdef CONFIG_NETWORKING_WITH_IPV6
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
const uip_ds6_addr_t *uip_addr;
uip_ipaddr_t ipaddr;
#endif
int i;
struct net_context *context = NULL;
/* User must provide storage for the local address. */
if (!local_addr) {
return NULL;
}
#ifdef CONFIG_NETWORKING_WITH_IPV6
if (memcmp(&local_addr->in6_addr, &in6addr_any,
sizeof(in6addr_any)) == 0) {
uip_addr = uip_ds6_get_global(-1);
if (!uip_addr) {
uip_addr = uip_ds6_get_link_local(-1);
}
if (!uip_addr) {
return NULL;
}
memcpy(&local_addr->in6_addr, &uip_addr->ipaddr,
sizeof(struct in6_addr));
}
#else
if (local_addr->in_addr.s_addr == INADDR_ANY) {
uip_gethostaddr((uip_ipaddr_t *)&local_addr->in_addr);
}
#endif
nano_sem_take(&contexts_lock, TICKS_UNLIMITED);
if (local_port) {
if (context_port_used(ip_proto, local_port, local_addr) < 0) {
return NULL;
}
} else {
do {
local_port = random_rand() | 0x8000;
} while (context_port_used(ip_proto, local_port,
local_addr) == -EEXIST);
}
for (i = 0; i < NET_MAX_CONTEXT; i++) {
if (!contexts[i].tuple.ip_proto) {
contexts[i].tuple.ip_proto = ip_proto;
contexts[i].tuple.remote_addr = (struct net_addr *)remote_addr;
contexts[i].tuple.remote_port = remote_port;
contexts[i].tuple.local_addr = (struct net_addr *)local_addr;
contexts[i].tuple.local_port = local_port;
context = &contexts[i];
break;
}
}
context_sem_give(&contexts_lock);
/* Set our local address */
#ifdef CONFIG_NETWORKING_WITH_IPV6
memcpy(&ipaddr.u8, local_addr->in6_addr.s6_addr, sizeof(ipaddr.u8));
if (uip_is_addr_mcast(&ipaddr)) {
uip_ds6_maddr_add(&ipaddr);
} else {
uip_ds6_addr_add(&ipaddr, 0, ADDR_MANUAL);
}
#endif
return context;
}
