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[pub/USBasp.git] / Projects / Webserver / Lib / DHCPServerApp.c

diff --git a/Projects/Webserver/Lib/DHCPServerApp.c b/Projects/Webserver/Lib/DHCPServerApp.c
index 43d539f..fadb9e8 100644 (file)
--- a/Projects/Webserver/Lib/DHCPServerApp.c
+++ b/Projects/Webserver/Lib/DHCPServerApp.c
@@ -42,20 +42,20 @@
 struct uip_conn* BroadcastConnection;
 
 uint8_t LeasedIPs[255 / 8];
 struct uip_conn* BroadcastConnection;
 
 uint8_t LeasedIPs[255 / 8];

-       
+

 /** Initialization function for the DHCP server. */
 void DHCPServerApp_Init(void)
 {
        /* Listen on port 67 for DHCP server connections from hosts */
        uip_listen(HTONS(DHCP_SERVER_PORT));
 /** Initialization function for the DHCP server. */
 void DHCPServerApp_Init(void)
 {
        /* Listen on port 67 for DHCP server connections from hosts */
        uip_listen(HTONS(DHCP_SERVER_PORT));

-       
+

        /* Create a new UDP connection to the DHCP server port for the DHCP solicitation */
        struct uip_udp_conn* BroadcastConnection = uip_udp_new(&uip_broadcast_addr, HTONS(DHCP_CLIENT_PORT));
 
        /* If the connection was successfully created, bind it to the local DHCP client port */
        if (BroadcastConnection != NULL)
          uip_udp_bind(BroadcastConnection, HTONS(DHCP_SERVER_PORT));
        /* Create a new UDP connection to the DHCP server port for the DHCP solicitation */
        struct uip_udp_conn* BroadcastConnection = uip_udp_new(&uip_broadcast_addr, HTONS(DHCP_CLIENT_PORT));
 
        /* If the connection was successfully created, bind it to the local DHCP client port */
        if (BroadcastConnection != NULL)
          uip_udp_bind(BroadcastConnection, HTONS(DHCP_SERVER_PORT));

-         
+

        /* Set all IP addresses as unleased */
        memset(LeasedIPs, 0x00, sizeof(LeasedIPs));
 }
        /* Set all IP addresses as unleased */
        memset(LeasedIPs, 0x00, sizeof(LeasedIPs));
 }


@@ -88,8 +88,8 @@ void DHCPServerApp_Callback(void)
 
                /* Try to extract out the client's preferred IP address if it is indicated in the packet */
                if (!(DHCPCommon_GetOption(AppData->Options, DHCP_OPTION_REQ_IPADDR, &PreferredClientIP)))
 
                /* Try to extract out the client's preferred IP address if it is indicated in the packet */
                if (!(DHCPCommon_GetOption(AppData->Options, DHCP_OPTION_REQ_IPADDR, &PreferredClientIP)))

-                 memcpy(&PreferredClientIP, &uip_all_zeroes_addr, sizeof(uip_ipaddr_t));       
-               
+                 memcpy(&PreferredClientIP, &uip_all_zeroes_addr, sizeof(uip_ipaddr_t));
+

                switch (DHCPMessageType)
                {
                        case DHCP_DISCOVER:
                switch (DHCPMessageType)
                {
                        case DHCP_DISCOVER:


@@ -116,7 +116,7 @@ void DHCPServerApp_Callback(void)
                                /* Check to see if the requested IP address has already been leased to a client */
                                if (!(DHCPServerApp_CheckIfIPLeased(&PreferredClientIP)))
                                {
                                /* Check to see if the requested IP address has already been leased to a client */
                                if (!(DHCPServerApp_CheckIfIPLeased(&PreferredClientIP)))
                                {

-                                       /* Create a new DHCP ACK packet to accept the IP address lease */                                       
+                                       /* Create a new DHCP ACK packet to accept the IP address lease */

                                        AppDataSize += DHCPServerApp_FillDHCPHeader(AppData, DHCP_ACK, &RemoteMACAddress, &PreferredClientIP, TransactionID);
 
                                        /* Add network mask and router information to the list of DHCP ACK packet options */
                                        AppDataSize += DHCPServerApp_FillDHCPHeader(AppData, DHCP_ACK, &RemoteMACAddress, &PreferredClientIP, TransactionID);
 
                                        /* Add network mask and router information to the list of DHCP ACK packet options */


@@ -133,12 +133,12 @@ void DHCPServerApp_Callback(void)
                                        /* Create a new DHCP NAK packet to reject the requested allocation */
                                        AppDataSize += DHCPServerApp_FillDHCPHeader(AppData, DHCP_NAK, &RemoteMACAddress, &uip_all_zeroes_addr, TransactionID);
                                }
                                        /* Create a new DHCP NAK packet to reject the requested allocation */
                                        AppDataSize += DHCPServerApp_FillDHCPHeader(AppData, DHCP_NAK, &RemoteMACAddress, &uip_all_zeroes_addr, TransactionID);
                                }

-                               
+

                                /* Send the DHCP ACK or NAK packet */
                                uip_poll_conn(BroadcastConnection);
                                memcpy(&uip_udp_conn->ripaddr, &uip_broadcast_addr, sizeof(uip_ipaddr_t));
                                uip_udp_send(AppDataSize);
                                /* Send the DHCP ACK or NAK packet */
                                uip_poll_conn(BroadcastConnection);
                                memcpy(&uip_udp_conn->ripaddr, &uip_broadcast_addr, sizeof(uip_ipaddr_t));
                                uip_udp_send(AppDataSize);

-                       
+

                                break;
                        case DHCP_RELEASE:
                                /* Mark the IP address as released in the allocation table */
                                break;
                        case DHCP_RELEASE:
                                /* Mark the IP address as released in the allocation table */


@@ -179,7 +179,7 @@ static uint16_t DHCPServerApp_FillDHCPHeader(DHCP_Header_t* const DHCPHeader,
        memcpy(&DHCPHeader->YourIP, PreferredClientIP, sizeof(uip_ipaddr_t));
        memcpy(&DHCPHeader->ClientHardwareAddress, ClientHardwareAddress, sizeof(struct uip_eth_addr));
        DHCPHeader->Cookie                = DHCP_MAGIC_COOKIE;
        memcpy(&DHCPHeader->YourIP, PreferredClientIP, sizeof(uip_ipaddr_t));
        memcpy(&DHCPHeader->ClientHardwareAddress, ClientHardwareAddress, sizeof(struct uip_eth_addr));
        DHCPHeader->Cookie                = DHCP_MAGIC_COOKIE;

-         
+

        /* Add a DHCP message type and terminator options to the start of the DHCP options field */
        DHCPHeader->Options[0]            = DHCP_OPTION_MSG_TYPE;
        DHCPHeader->Options[1]            = 1;
        /* Add a DHCP message type and terminator options to the start of the DHCP options field */
        DHCPHeader->Options[0]            = DHCP_OPTION_MSG_TYPE;
        DHCPHeader->Options[1]            = 1;


@@ -202,7 +202,7 @@ static bool DHCPServerApp_CheckIfIPLeased(const uip_ipaddr_t* const IPAddress)
 {
        uint8_t Byte = (IPAddress->u8[3] / 8);
        uint8_t Mask = (1 << (IPAddress->u8[3] % 8));
 {
        uint8_t Byte = (IPAddress->u8[3] / 8);
        uint8_t Mask = (1 << (IPAddress->u8[3] % 8));

-       
+

        /* Make sure that the requested IP address isn't already leased to the virtual server or another client */
        if (IPAddress->u8[3] && !(IPAddress->u8[3] == uip_hostaddr.u8[3]) && !(LeasedIPs[Byte] & Mask))
          return false;
        /* Make sure that the requested IP address isn't already leased to the virtual server or another client */
        if (IPAddress->u8[3] && !(IPAddress->u8[3] == uip_hostaddr.u8[3]) && !(LeasedIPs[Byte] & Mask))
          return false;


@@ -217,13 +217,13 @@ static bool DHCPServerApp_CheckIfIPLeased(const uip_ipaddr_t* const IPAddress)
 static void DHCPServerApp_GetUnleasedIP(uip_ipaddr_t* const NewIPAddress)
 {
        uip_ipaddr_copy(NewIPAddress, &uip_hostaddr);
 static void DHCPServerApp_GetUnleasedIP(uip_ipaddr_t* const NewIPAddress)
 {
        uip_ipaddr_copy(NewIPAddress, &uip_hostaddr);

-       
+

        /** Look through the current subnet, skipping the broadcast and zero IP addresses */
        for (uint8_t IP = 1; IP < 254; IP++)
        {
                /* Update new IP address to lease with the current IP address to test */
                NewIPAddress->u8[3] = IP;
        /** Look through the current subnet, skipping the broadcast and zero IP addresses */
        for (uint8_t IP = 1; IP < 254; IP++)
        {
                /* Update new IP address to lease with the current IP address to test */
                NewIPAddress->u8[3] = IP;

-               
+

                /* If we've found an unleased IP, abort with the updated IP stored for the called */
                if (!(DHCPServerApp_CheckIfIPLeased(NewIPAddress)))
                  return;
                /* If we've found an unleased IP, abort with the updated IP stored for the called */
                if (!(DHCPServerApp_CheckIfIPLeased(NewIPAddress)))
                  return;


@@ -241,7 +241,7 @@ static void DHCPServerApp_LeaseIP(const uip_ipaddr_t* const IPAddress)
 {
        uint8_t Byte = (IPAddress->u8[3] / 8);
        uint8_t Mask = (1 << (IPAddress->u8[3] % 8));
 {
        uint8_t Byte = (IPAddress->u8[3] / 8);
        uint8_t Mask = (1 << (IPAddress->u8[3] % 8));

-       
+

        /* Mark the IP address as leased in the allocation table */
        LeasedIPs[Byte] |= Mask;
 }
        /* Mark the IP address as leased in the allocation table */
        LeasedIPs[Byte] |= Mask;
 }


@@ -257,7 +257,7 @@ static void DHCPServerApp_UnleaseIP(const uip_ipaddr_t* const IPAddress)
 {
        uint8_t Byte = (IPAddress->u8[3] / 8);
        uint8_t Mask = (1 << (IPAddress->u8[3] % 8));
 {
        uint8_t Byte = (IPAddress->u8[3] / 8);
        uint8_t Mask = (1 << (IPAddress->u8[3] % 8));

-       
+

        /* Mark the IP address as unleased in the allocation table */
        LeasedIPs[Byte] &= ~Mask;
 }
        /* Mark the IP address as unleased in the allocation table */
        LeasedIPs[Byte] &= ~Mask;
 }