C++ (Cpp) LWIP_AUTOIP_CREATE_SEED_ADDR 예제들

예제 #1

파일: autoip.c 프로젝트: fanghuaqi/lwip_official

/**
 * Create an IP-Address out of range 169.254.1.0 to 169.254.254.255
 *
 * @param netif network interface on which create the IP-Address
 * @param ipaddr ip address to initialize
 */
static void
autoip_create_addr(struct netif *netif, ip4_addr_t *ipaddr)
{
  /* Here we create an IP-Address out of range 169.254.1.0 to 169.254.254.255
   * compliant to RFC 3927 Section 2.1
   * We have 254 * 256 possibilities */

  u32_t addr = ntohl(LWIP_AUTOIP_CREATE_SEED_ADDR(netif));
  addr += netif->autoip->tried_llipaddr;
  addr = AUTOIP_NET | (addr & 0xffff);
  /* Now, 169.254.0.0 <= addr <= 169.254.255.255 */

  if (addr < AUTOIP_RANGE_START) {
    addr += AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
  }
  if (addr > AUTOIP_RANGE_END) {
    addr -= AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
  }
  LWIP_ASSERT("AUTOIP address not in range", (addr >= AUTOIP_RANGE_START) &&
    (addr <= AUTOIP_RANGE_END));
  ip4_addr_set_u32(ipaddr, htonl(addr));

  LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
    ("autoip_create_addr(): tried_llipaddr=%"U16_F", %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
    (u16_t)(netif->autoip->tried_llipaddr), ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr),
    ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
}

예제 #2

파일: autoip.c 프로젝트: Altizon/Aliot-SDK-Examples

/**
 * Create an IP-Address out of range 169.254.1.0 to 169.254.254.255
 *
 * @param netif network interface on which create the IP-Address
 * @param ipaddr ip address to initialize
 */
static void
autoip_create_addr(struct netif *netif, ip_addr_t *ipaddr)
{
  /* Here we create an IP-Address out of range 169.254.1.0 to 169.254.254.255
   * compliant to RFC 3927 Section 2.1
   * We have 254 * 256 possibilities */

	u32_t addr;
	if (prev_llipaddr.addr) {
	  /* Use previously announced IP address, if any.
	   * Previously announced IP doesn't persist across device reboot.
	   * Its useful only in case of network hot-plugging/link-loss. */
		addr = ntohl(prev_llipaddr.addr);
	} else {
		addr = ntohl(LWIP_AUTOIP_CREATE_SEED_ADDR(netif));
	}

  addr += netif->autoip->tried_llipaddr;
  addr = AUTOIP_NET | (addr & 0xffff);
  /* Now, 169.254.0.0 <= addr <= 169.254.255.255 */ 

  if (addr < AUTOIP_RANGE_START) {
    addr += AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
  }
  if (addr > AUTOIP_RANGE_END) {
    addr -= AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
  }
  LWIP_ASSERT("AUTOIP address not in range", (addr >= AUTOIP_RANGE_START) &&
    (addr <= AUTOIP_RANGE_END));
  ip4_addr_set_u32(ipaddr, htonl(addr));
  
  LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
    ("autoip_create_addr(): tried_llipaddr=%"U16_F", %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
    (u16_t)(netif->autoip->tried_llipaddr), ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr),
    ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
}