int dhcpd_sendack(in_addr_t ipaddr)
{
uint32_t leasetime = CONFIG_NETUTILS_DHCPD_LEASETIME;
in_addr_t netaddr;
#ifdef HAVE_DSNIP
uint32_t dnsaddr;
dnsaddr = htonl(CONFIG_NETUTILS_DHCPD_DNSIP);
#endif
/* Initialize the ACK response */
dhcpd_initpacket(DHCPACK);
memcpy(g_state.ds_outpacket.ciaddr, g_state.ds_inpacket.ciaddr, 4);
/* Add the IP address assigned to the client */
netaddr = htonl(ipaddr);
memcpy(g_state.ds_outpacket.yiaddr, &netaddr, 4);
/* Did the client request a specific lease time? */
(void)dhcpd_verifyreqleasetime(&leasetime);
/* Add the lease time to the response */
dhcpd_addoption32(DHCP_OPTION_LEASE_TIME, htonl(leasetime));
#ifdef HAVE_NETMASK
dhcpd_addoption32(DHCP_OPTION_SUBNET_MASK, htonl(CONFIG_NETUTILS_DHCPD_NETMASK));
#endif
#ifdef HAVE_ROUTERIP
dhcpd_addoption32(DHCP_OPTION_ROUTER, htonl(CONFIG_NETUTILS_DHCPD_ROUTERIP));
#endif
#ifdef HAVE_DSNIP
dhcp_addoption32p(DHCP_OPTION_DNS_SERVER, (FAR uint8_t*)&dnsaddr);
#endif
#ifdef CONFIG_NETUTILS_DHCPD_IGNOREBROADCAST
if (dhcpd_sendpacket(true) < 0)
#else
if (dhcpd_sendpacket(false) < 0)
#endif
{
return ERROR;
}
dhcpd_setlease(g_state.ds_inpacket.chaddr, ipaddr, leasetime);
return OK;
}
static void dhcpd_initpacket(uint8_t mtype)
{
uint32_t nulladdr = 0;
/* Set up the generic parts of the DHCP server message */
memset(&g_state.ds_outpacket, 0, sizeof(struct dhcpmsg_s));
g_state.ds_outpacket.op = DHCP_REPLY;
g_state.ds_outpacket.htype = g_state.ds_inpacket.htype;
g_state.ds_outpacket.hlen = g_state.ds_inpacket.hlen;
memcpy(&g_state.ds_outpacket.xid, &g_state.ds_inpacket.xid, 4);
memcpy(g_state.ds_outpacket.chaddr, g_state.ds_inpacket.chaddr, 16);
if (memcmp(g_state.ds_outpacket.giaddr, &nulladdr, 4) != 0)
{
g_state.ds_outpacket.flags = g_state.ds_inpacket.flags;
}
else
{
g_state.ds_outpacket.flags = 0;
}
memset(g_state.ds_outpacket.giaddr, 0, 4);
/* Add the generic options */
memcpy(g_state.ds_outpacket.options, g_magiccookie, 4);
g_state.ds_optend = &g_state.ds_outpacket.options[4];
*g_state.ds_optend = DHCP_OPTION_END;
dhcpd_addoption8(DHCP_OPTION_MSG_TYPE, mtype);
dhcpd_addoption32(DHCP_OPTION_SERVER_ID, g_state.ds_serverip);
}
int dhcpd_sendack(in_addr_t ipaddr)
{
uint32_t leasetime = CONFIG_NETUTILS_DHCPD_LEASETIME;
in_addr_t netaddr;
/* Initialize the ACK response */
dhcpd_initpacket(DHCPACK);
memcpy(g_state.ds_outpacket.ciaddr, g_state.ds_inpacket.ciaddr, 4);
/* Add the IP address assigned to the client */
netaddr = htonl(ipaddr);
memcpy(g_state.ds_outpacket.yiaddr, &netaddr, 4);
/* Did the client request a specific lease time? */
(void)dhcpd_verifyreqleasetime(&leasetime);
/* Add the lease time to the response */
dhcpd_addoption32(DHCP_OPTION_LEASE_TIME, htonl(leasetime));
#ifdef CONFIG_NETUTILS_DHCPD_IGNOREBROADCAST
if (dhcpd_sendpacket(true) < 0)
#else
if (dhcpd_sendpacket(false) < 0)
#endif
{
return ERROR;
}
dhcpd_setlease(g_state.ds_inpacket.chaddr, ipaddr, leasetime);
return OK;
}
static inline int dhcpd_sendoffer(in_addr_t ipaddr, uint32_t leasetime)
{
in_addr_t netaddr;
/* IP address is in host order */
nvdbg("Sending offer: %08lx\n", (long)ipaddr);
/* Initialize the outgoing packet */
dhcpd_initpacket(DHCPOFFER);
/* Add the address offered to the client (converting to network order) */
netaddr = htonl(ipaddr);
memcpy(g_state.ds_outpacket.yiaddr, &netaddr, 4);
/* Add the leasetime to the response options */
dhcpd_addoption32(DHCP_OPTION_LEASE_TIME, htonl(leasetime));
/* Send the offer response */
#ifdef CONFIG_NETUTILS_DHCPD_IGNOREBROADCAST
return dhcpd_sendpacket(true);
#else
return dhcpd_sendpacket(false);
#endif
}
static inline int dhcpd_sendoffer(in_addr_t ipaddr, uint32_t leasetime)
{
in_addr_t netaddr;
#ifdef HAVE_DSNIP
uint32_t dnsaddr;
dnsaddr = htonl(CONFIG_NETUTILS_DHCPD_DNSIP);
#endif
/* IP address is in host order */
nvdbg("Sending offer: %08lx\n", (long)ipaddr);
/* Initialize the outgoing packet */
dhcpd_initpacket(DHCPOFFER);
/* Add the address offered to the client (converting to network order) */
netaddr = htonl(ipaddr);
memcpy(g_state.ds_outpacket.yiaddr, &netaddr, 4);
/* Add the leasetime to the response options */
dhcpd_addoption32(DHCP_OPTION_LEASE_TIME, htonl(leasetime));
#ifdef HAVE_NETMASK
dhcpd_addoption32(DHCP_OPTION_SUBNET_MASK, htonl(CONFIG_NETUTILS_DHCPD_NETMASK));
#endif
#ifdef HAVE_ROUTERIP
dhcpd_addoption32(DHCP_OPTION_ROUTER, htonl(CONFIG_NETUTILS_DHCPD_ROUTERIP));
#endif
#ifdef HAVE_DSNIP
dhcp_addoption32p(DHCP_OPTION_DNS_SERVER, (FAR uint8_t*)&dnsaddr);
#endif
/* Send the offer response */
#ifdef CONFIG_NETUTILS_DHCPD_IGNOREBROADCAST
return dhcpd_sendpacket(true);
#else
return dhcpd_sendpacket(false);
#endif
}
