int uip_udpconnect(struct uip_udp_conn *conn, const struct sockaddr_in *addr)
#endif
{
/* Has this address already been bound to a local port (lport)? */
if (!conn->lport)
{
/* No.. Find an unused local port number and bind it to the
* connection structure.
*/
conn->lport = htons(uip_selectport());
}
/* Is there a remote port (rport) */
if (addr)
{
conn->rport = addr->sin_port;
uip_ipaddr_copy(conn->ripaddr, addr->sin_addr.s_addr);
}
else
{
conn->rport = 0;
uip_ipaddr_copy(conn->ripaddr, g_allzeroaddr);
}
conn->ttl = UIP_TTL;
return OK;
}
int uip_tcpbind(struct uip_conn *conn, const struct sockaddr_in *addr)
#endif
{
uip_lock_t flags;
int port;
/* Verify or select a local port */
flags = uip_lock();
port = uip_selectport(ntohs(addr->sin_port));
uip_unlock(flags);
if (port < 0)
{
return port;
}
/* Save the local address in the connection structure. Note that the requested
* local IP address is saved but not used. At present, only a single network
* interface is supported, the IP address is not of importance.
*/
conn->lport = addr->sin_port;
#if 0 /* Not used */
#ifdef CONFIG_NET_IPv6
uip_ipaddr_copy(conn->lipaddr, addr->sin6_addr.in6_u.u6_addr16);
#else
uip_ipaddr_copy(conn->lipaddr, addr->sin_addr.s_addr);
#endif
#endif
return OK;
}
int uip_udpbind(struct uip_udp_conn *conn, const struct sockaddr_in *addr)
#endif
{
int ret = -EADDRINUSE;
uip_lock_t flags;
/* Is the user requesting to bind to any port? */
if (!addr->sin_port)
{
/* Yes.. Find an unused local port number */
conn->lport = htons(uip_selectport());
ret = OK;
}
else
{
/* Interrupts must be disabled while access the UDP connection list */
flags = uip_lock();
/* Is any other UDP connection bound to this port? */
if (!uip_find_conn(addr->sin_port))
{
/* No.. then bind the socket to the port */
conn->lport = addr->sin_port;
ret = OK;
}
uip_unlock(flags);
}
return ret;
}
int uip_tcpconnect(struct uip_conn *conn, const struct sockaddr_in *addr)
#endif
{
uip_lock_t flags;
int port;
/* The connection is expected to be in the UIP_ALLOCATED state.. i.e.,
* allocated via up_tcpalloc(), but not yet put into the active connections
* list.
*/
if (!conn || conn->tcpstateflags != UIP_ALLOCATED)
{
return -EISCONN;
}
/* If the TCP port has not alread been bound to a local port, then select
* one now.
*/
flags = uip_lock();
port = uip_selectport(ntohs(conn->lport));
uip_unlock(flags);
if (port < 0)
{
return port;
}
/* Initialize and return the connection structure, bind it to the port number */
conn->tcpstateflags = UIP_SYN_SENT;
uip_tcpinitsequence(conn->sndseq);
conn->initialmss = conn->mss = UIP_TCP_MSS;
conn->unacked = 1; /* TCP length of the SYN is one. */
conn->nrtx = 0;
conn->timer = 1; /* Send the SYN next time around. */
conn->rto = UIP_RTO;
conn->sa = 0;
conn->sv = 16; /* Initial value of the RTT variance. */
conn->lport = htons((uint16_t)port);
/* The sockaddr port is 16 bits and already in network order */
conn->rport = addr->sin_port;
/* The sockaddr address is 32-bits in network order. */
uip_ipaddr_copy(conn->ripaddr, addr->sin_addr.s_addr);
/* Initialize the list of TCP read-ahead buffers */
#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
sq_init(&conn->readahead);
#endif
/* And, finally, put the connection structure into the active
* list. Because g_active_tcp_connections is accessed from user level and
* interrupt level, code, it is necessary to keep interrupts disabled during
* this operation.
*/
flags = uip_lock();
dq_addlast(&conn->node, &g_active_tcp_connections);
uip_unlock(flags);
return OK;
}
