[U-Boot] [PATCH] Support sending DHCP client options

[Gray Remlin <g_remlin@rocketmail.com>]

 Signed-off-by: Gray Remlin <g_remlin@rocketmail.com>

---
 common/cmd_nvedit.c |    3 ++
 net/bootp.c         |   52
+++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 0 deletions(-)

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 3d30c32..2094e8e 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -224,6 +224,9 @@ int _do_env_set (int flag, int argc, char * const
argv[])
        if (ep) {               /* variable exists */
 #ifndef CONFIG_ENV_OVERWRITE
                if ((strcmp (name, "serial#") == 0) ||
+#if defined(CONFIG_BOOTP_OPTIONS)
+                   (strcmp(name, "dhcp_vendor-class-identifier") == 0) ||
+#endif /* CONFIG_BOOTP_OPTIONS */
                    ((strcmp (name, "ethaddr") == 0)
 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
                     && (strcmp (ep->data,MK_STR(CONFIG_ETHADDR)) != 0)
diff --git a/net/bootp.c b/net/bootp.c
index 1289e3b..9e687b0 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -68,6 +68,54 @@ extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e
after add own opts. */
 extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL  */
 #endif

+#if defined(CONFIG_BOOTP_OPTIONS) /* check environment for dhcp client
options */
+
+/*
+ *     The vendor-specifiable options should not be changeable
+ *     unless CONFIG_ENV_OVERWRITE has been defined, however
+ *     user-specifiable options should be changeable regardless
+ */
+u8 dhcp_options_prep(u8 **ep)
+{
+       u8 *e = *ep;
+       char *ptr;
+
+       debug("DHCP Client options start\n");
+
+       /* vendor-specifiable identification string */
+       if ((ptr = getenv("dhcp_vendor-class-identifier"))) {
+               debug("dhcp_vendor-class-identifier=%s\n",ptr);
+               *e++ = 60;
+               *e++ = strlen(ptr);
+               while (*ptr)
+                       *e++ = *ptr++;
+       }
+
+       /* user-specifiable identification string */
+       if ((ptr = getenv("dhcp_dhcp-client-identifier"))) {
+               debug("dhcp_dhcp-client-identifier=%s\n",ptr);
+               *e++ = 61;
+               *e++ = strlen(ptr);
+               while (*ptr)
+                       *e++ = *ptr++;
+       }
+
+       /* user-specifiable identification string */
+       if ((ptr = getenv("dhcp_user-class"))) {
+               debug("dhcp_user-class=%s\n",ptr);
+               *e++ = 77;
+               *e++ = strlen(ptr);
+               while (*ptr)
+                       *e++ = *ptr++;
+       }
+
+       debug("DHCP Client options end\n");
+       *ep = e;
+       return e;
+}
+
+#endif /* CONFIG_BOOTP_OPTIONS */
+
 #endif

 static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src,
unsigned len)
@@ -412,6 +460,10 @@ static int DhcpExtended (u8 * e, int message_type,
IPaddr_t ServerID, IPaddr_t R
        }
 #endif

+#if defined(CONFIG_BOOTP_OPTIONS)
+       dhcp_options_prep (&e);
+#endif
+
 #if defined(CONFIG_BOOTP_VENDOREX)
        if ((x = dhcp_vendorex_prep (e)))
                return x - start;
--