Clean checkin of the 6.03 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BUG: 32495852
Change-Id: I5038a3bb41e217380c1188463daec07b1e9b6b48

1 files changed, 175 insertions, 0 deletions

diff --git a/efi/pxe.c b/efi/pxe.c
new file mode 100644
index 0000000..0c9fb06
--- /dev/null
+++ b/efi/pxe.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2013-2014 Intel Corporation - All Rights Reserved
+ */
+
+#include <syslinux/firmware.h>
+#include <syslinux/pxe_api.h>
+#include "efi.h"
+#include "net.h"
+#include "fs/pxe/pxe.h"
+
+const struct url_scheme url_schemes[] = {
+    { "tftp", tftp_open, 0 },
+    { "http", http_open, O_DIRECTORY },
+    { "ftp",  ftp_open,  O_DIRECTORY },
+    { NULL, NULL, 0 },
+};
+
+/**
+ * Network stack-specific initialization
+ */
+void net_core_init(void)
+{
+    http_bake_cookies();
+}
+
+void pxe_init_isr(void) {}
+void gpxe_init(void) {}
+void pxe_idle_init(void) {}
+
+int reset_pxe(void)
+{
+    return 0;
+}
+
+#define DNS_MAX_SERVERS 4		/* Max no of DNS servers */
+uint32_t dns_server[DNS_MAX_SERVERS] = {0, };
+
+__export uint32_t dns_resolv(const char *name)
+{
+    /*
+     * Return failure on an empty input... this can happen during
+     * some types of URL parsing, and this is the easiest place to
+     * check for it.
+     */
+    if (!name || !*name)
+	return 0;
+
+    return 0;
+}
+
+int pxe_init(bool quiet)
+{
+    EFI_HANDLE *handles;
+    EFI_STATUS status;
+    UINTN nr_handles;
+
+    status = LibLocateHandle(ByProtocol, &PxeBaseCodeProtocol,
+			     NULL, &nr_handles, &handles);
+    if (status != EFI_SUCCESS) {
+	if (!quiet)
+	    Print(L"No PXE Base Code Protocol\n");
+	return -1;
+    }
+
+    return 0;
+}
+
+#define EDHCP_BUF_LEN 8192
+
+struct embedded_dhcp_options {
+    uint32_t magic[4];
+    uint32_t bdhcp_len;
+    uint32_t adhcp_len;
+    uint32_t buffer_size;
+    uint32_t reserved;
+    uint8_t  dhcp_data[EDHCP_BUF_LEN];
+} __attribute__((aligned(16)));
+
+struct embedded_dhcp_options embedded_dhcp_options =
+{
+    .magic[0] = 0x2a171ead,
+    .magic[1] = 0x0600e65e,
+    .magic[2] = 0x4025a4e4,
+    .magic[3] = 0x42388fc8,
+    .bdhcp_len = 0,
+    .adhcp_len = 0,
+    .buffer_size = EDHCP_BUF_LEN,
+};
+
+void net_parse_dhcp(void)
+{
+    EFI_PXE_BASE_CODE_MODE *mode;
+    EFI_PXE_BASE_CODE *bc;
+    unsigned int pkt_len = sizeof(EFI_PXE_BASE_CODE_PACKET);
+    EFI_STATUS status;
+    EFI_HANDLE *handles = NULL;
+    UINTN nr_handles = 0;
+    uint8_t hardlen;
+    uint32_t ip;
+    char dst[256];
+
+    status = LibLocateHandle(ByProtocol, &PxeBaseCodeProtocol,
+			 NULL, &nr_handles, &handles);
+    if (status != EFI_SUCCESS)
+	return;
+
+    /* Probably want to use IPv4 protocol to decide which handle to use */
+    status = uefi_call_wrapper(BS->HandleProtocol, 3, handles[0],
+			   &PxeBaseCodeProtocol, (void **)&bc);
+    if (status != EFI_SUCCESS) {
+	Print(L"Failed to lookup PxeBaseCodeProtocol\n");
+    }
+
+    mode = bc->Mode;
+
+    /*
+     * Parse any "before" hardcoded options
+     */
+    parse_dhcp_options(embedded_dhcp_options.dhcp_data,
+		       embedded_dhcp_options.bdhcp_len, 0);
+
+    /*
+     * Get the DHCP client identifiers (query info 1)
+     */
+    Print(L"Getting cached packet ");
+    parse_dhcp(&mode->DhcpDiscover.Dhcpv4, pkt_len);
+    /*
+     * We don't use flags from the request packet, so
+     * this is a good time to initialize DHCPMagic...
+     * Initialize it to 1 meaning we will accept options found;
+     * in earlier versions of PXELINUX bit 0 was used to indicate
+     * we have found option 208 with the appropriate magic number;
+     * we no longer require that, but MAY want to re-introduce
+     * it in the future for vendor encapsulated options.
+     */
+    *(char *)&DHCPMagic = 1;
+
+    /*
+     * Get the BOOTP/DHCP packet that brought us file (and an IP
+     * address). This lives in the DHCPACK packet (query info 2)
+     */
+    parse_dhcp(&mode->DhcpAck.Dhcpv4, pkt_len);
+    /*
+     * Save away MAC address (assume this is in query info 2. If this
+     * turns out to be problematic it might be better getting it from
+     * the query info 1 packet
+     */
+    hardlen = mode->DhcpAck.Dhcpv4.BootpHwAddrLen;
+    MAC_len = hardlen > 16 ? 0 : hardlen;
+    MAC_type = mode->DhcpAck.Dhcpv4.BootpHwType;
+    memcpy(MAC, mode->DhcpAck.Dhcpv4.BootpHwAddr, MAC_len);
+
+    /*
+     * Get the boot file and other info. This lives in the CACHED_REPLY
+     * packet (query info 3)
+     */
+    parse_dhcp(&mode->PxeReply.Dhcpv4, pkt_len);
+    Print(L"\n");
+
+    /*
+     * Parse any "after" hardcoded options
+     */
+    parse_dhcp_options(embedded_dhcp_options.dhcp_data +
+		       embedded_dhcp_options.bdhcp_len,
+		       embedded_dhcp_options.adhcp_len, 0);
+
+    ip = IPInfo.myip;
+    sprintf(dst, "%u.%u.%u.%u",
+        ((const uint8_t *)&ip)[0],
+        ((const uint8_t *)&ip)[1],
+        ((const uint8_t *)&ip)[2],
+        ((const uint8_t *)&ip)[3]);
+
+    Print(L"My IP is %a\n", dst);
+}