net: bootp: add PXE/RFC 4578 DHCP options support
These options are required to be present in RFC 4578 compliant DHCP
requests. They give more information to DHCP servers to allow serving
different DHCP responses to different systems based on client
architecture, client capabilities, UUID, or vendor.
Signed-off-by: Jason Hobbs <jason.hobbs@calxeda.com>
diff --git a/net/bootp.c b/net/bootp.c
index a003c42..73470f2 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -381,6 +381,11 @@
{
u8 *start = e;
u8 *cnt;
+#if defined(CONFIG_BOOTP_PXE)
+ char *uuid;
+ size_t vci_strlen;
+ u16 clientarch;
+#endif
#if defined(CONFIG_BOOTP_VENDOREX)
u8 *x;
@@ -435,6 +440,41 @@
}
#endif
+#if defined(CONFIG_BOOTP_PXE)
+ clientarch = CONFIG_BOOTP_PXE_CLIENTARCH;
+ *e++ = 93; /* Client System Architecture */
+ *e++ = 2;
+ *e++ = (clientarch >> 8) & 0xff;
+ *e++ = clientarch & 0xff;
+
+ *e++ = 94; /* Client Network Interface Identifier */
+ *e++ = 3;
+ *e++ = 1; /* type field for UNDI */
+ *e++ = 0; /* major revision */
+ *e++ = 0; /* minor revision */
+
+ uuid = getenv("pxeuuid");
+
+ if (uuid) {
+ if (uuid_str_valid(uuid)) {
+ *e++ = 97; /* Client Machine Identifier */
+ *e++ = 17;
+ *e++ = 0; /* type 0 - UUID */
+
+ uuid_str_to_bin(uuid, e);
+ e += 16;
+ } else {
+ printf("Invalid pxeuuid: %s\n", uuid);
+ }
+ }
+
+ *e++ = 60; /* Vendor Class Identifier */
+ vci_strlen = strlen(CONFIG_BOOTP_VCI_STRING);
+ *e++ = vci_strlen;
+ memcpy(e, CONFIG_BOOTP_VCI_STRING, vci_strlen);
+ e += vci_strlen;
+#endif
+
#if defined(CONFIG_BOOTP_VENDOREX)
if ((x = dhcp_vendorex_prep (e)))
return x - start;