Determine client IP address and make it known to the ethernet interface.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19634 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/boot/platform/pxe_ia32/network.cpp

@@ -100,12 +100,32 @@ status_t
 UNDI::Init()
 {
 	TRACE("UNDI::Init\n");
-
+	
+	PXENV_GET_CACHED_INFO cached_info;
 	PXENV_UNDI_GET_INFORMATION get_info;
 	PXENV_UNDI_GET_STATE get_state;
 	PXENV_UNDI_OPEN undi_open;
 	uint16 res;
 
+	cached_info.PacketType = PXENV_PACKET_TYPE_CACHED_REPLY;
+	cached_info.BufferSize = 0;
+	cached_info.BufferLimit = 0;
+	cached_info.Buffer.seg = 0;
+	cached_info.Buffer.ofs = 0;
+	res = call_pxe_bios(fPxeData, GET_CACHED_INFO, &cached_info);
+	if (res != 0 || get_state.Status != 0) {
+		TRACE("PXENV_GET_CACHED_INFO failed, res %x, status %x\n", res, undi_open.Status);
+		panic("Can't determine our IP address\n");
+	}
+	
+	char *buf = (char *)(cached_info.Buffer.seg * 16 + cached_info.Buffer.ofs);
+	ip_addr_t ipClient = ntohl(*(ip_addr_t *)(buf + 16));
+	ip_addr_t ipServer = ntohl(*(ip_addr_t *)(buf + 20));
+
+	TRACE("client-ip: %08x, server-ip: %08x\n", (int)ipClient, (int)ipServer);
+
+	SetIPAddress(ipClient);
+
 	undi_open.OpenFlag = 0;
 	undi_open.PktFilter = FLTR_DIRECTED | FLTR_BRDCST | FLTR_PRMSCS;
 	undi_open.R_Mcast_Buf.MCastAddrCount = 0;

src/system/boot/platform/pxe_ia32/pxe_undi.h

@@ -14,6 +14,8 @@ extern "C" uint16 call_pxe_bios(void *pxe, uint16 opcode, void *param);
 #define UNDI_ISR				0x0014
 #define UNDI_GET_STATE			0x0015
 
+#define GET_CACHED_INFO			0x0071
+
 #define SEG(ptr)	((uint16)(((uint32)(ptr)) >> 4))
 #define OFS(ptr)	(((uint16)(ptr)) & 15)
 
@@ -60,6 +62,18 @@ struct PXE_STRUCT
 	SEGDESC	BC_CodeWrite;
 };
 
+struct PXENV_GET_CACHED_INFO
+{
+	uint16	Status;
+	uint16	PacketType;
+	#define PXENV_PACKET_TYPE_DHCP_DISCOVER 1
+	#define PXENV_PACKET_TYPE_DHCP_ACK      2
+	#define PXENV_PACKET_TYPE_CACHED_REPLY  3
+	uint16	BufferSize;
+	SEGOFF16 Buffer;
+	uint16	BufferLimit;
+};
+
 struct PXENV_UNDI_MCAST_ADDRESS
 {
 	#define MAXNUM_MCADDR       8