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Make packet processing code in the Webserver project a bit neater using a switch statement instead of an if-else-if chain.

This commit is contained in:
Dean Camera 2010-02-02 05:56:47 +00:00
parent 5687ac7316
commit 1008260985
1 changed files with 31 additions and 28 deletions
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59
Projects/Webserver/Lib/uIPManagement.c
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@ -92,47 +92,50 @@ void uIPManagement_ManageNetwork(void)
/** Processes incomming packets to the server from the connected RNDIS device, creating responses as needed. */ /** Processes incomming packets to the server from the connected RNDIS device, creating responses as needed. */
static void uIPManagement_ProcessIncommingPacket(void) static void uIPManagement_ProcessIncommingPacket(void)
{ {
if (RNDIS_Host_IsPacketReceived(&Ethernet_RNDIS_Interface)) /* If no packet received, exit processing routine */
if (!(RNDIS_Host_IsPacketReceived(&Ethernet_RNDIS_Interface)))
return;
LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
/* Read the incomming packet straight into the UIP packet buffer */
RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, uip_buf, &uip_len);
/* If the packet contains an Ethernet frame, process it */
if (uip_len > 0)
{ {
LEDs_SetAllLEDs(LEDMASK_USB_BUSY); switch (((struct uip_eth_hdr*)uip_buf)->type)
/* Read the incomming packet straight into the UIP packet buffer */
RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, uip_buf, &uip_len);
if (uip_len > 0)
{ {
bool PacketHandled = true; case HTONS(UIP_ETHTYPE_IP):
struct uip_eth_hdr* EthernetHeader = (struct uip_eth_hdr*)uip_buf;
if (EthernetHeader->type == HTONS(UIP_ETHTYPE_IP))
{
/* Filter packet by MAC destination */ /* Filter packet by MAC destination */
uip_arp_ipin(); uip_arp_ipin();
/* Process incomming packet */ /* Process incomming packet */
uip_input(); uip_input();
/* Add destination MAC to outgoing packet */ /* If a response was generated, send it */
if (uip_len > 0) if (uip_len > 0)
uip_arp_out(); {
} /* Add destination MAC to outgoing packet */
else if (EthernetHeader->type == HTONS(UIP_ETHTYPE_ARP)) uip_arp_out();
{
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
}
break;
case HTONS(UIP_ETHTYPE_ARP):
/* Process ARP packet */ /* Process ARP packet */
uip_arp_arpin(); uip_arp_arpin();
}
else /* If a response was generated, send it */
{ if (uip_len > 0)
PacketHandled = false; RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
}
break;
/* If a response was generated, send it */
if ((uip_len > 0) && PacketHandled)
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
} }
LEDs_SetAllLEDs(LEDMASK_USB_READY);
} }
LEDs_SetAllLEDs(LEDMASK_USB_READY);
} }
/** Manages the currently open network connections, including TCP and (if enabled) UDP. */ /** Manages the currently open network connections, including TCP and (if enabled) UDP. */