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authorRainer Jochem <rainer.jochem@mpi-sb.mpg.de>2007-11-14 02:18:39 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:53:59 -0800
commit62013dbb8418eb7231c1577d238cf2e76b7696b0 (patch)
treedfcfab3399f653bdf04a9bec21acba294fcf075b
parent20fea08b5fb639c4c175b5c74a2bb346c5c5bc2e (diff)
[IPV4] ipconfig: Implement DHCP Class-identifier
From : Rainer Jochem <rainer.jochem@mpi-sb.mpg.de> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/ipconfig.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index b8f7763b226..6422422b8e3 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -140,6 +140,8 @@ __be32 ic_servaddr = NONE; /* Boot server IP address */
__be32 root_server_addr = NONE; /* Address of NFS server */
u8 root_server_path[256] = { 0, }; /* Path to mount as root */
+static char vendor_class_identifier[253]; /* vendor class identifier */
+
/* Persistent data: */
static int ic_proto_used; /* Protocol used, if any */
@@ -588,6 +590,7 @@ ic_dhcp_init_options(u8 *options)
u8 mt = ((ic_servaddr == NONE)
? DHCPDISCOVER : DHCPREQUEST);
u8 *e = options;
+ int len;
#ifdef IPCONFIG_DEBUG
printk("DHCP: Sending message type %d\n", mt);
@@ -628,6 +631,16 @@ ic_dhcp_init_options(u8 *options)
*e++ = sizeof(ic_req_params);
memcpy(e, ic_req_params, sizeof(ic_req_params));
e += sizeof(ic_req_params);
+
+ if (*vendor_class_identifier) {
+ printk(KERN_INFO "DHCP: sending class identifier \"%s\"\n",
+ vendor_class_identifier);
+ *e++ = 60; /* Class-identifier */
+ len = strlen(vendor_class_identifier);
+ *e++ = len;
+ memcpy(e, vendor_class_identifier, len);
+ e += len;
+ }
}
*e++ = 255; /* End of the list */
@@ -1513,5 +1526,16 @@ static int __init nfsaddrs_config_setup(char *addrs)
return ip_auto_config_setup(addrs);
}
+static int __init vendor_class_identifier_setup(char *addrs)
+{
+ if (strlcpy(vendor_class_identifier, addrs,
+ sizeof(vendor_class_identifier))
+ >= sizeof(vendor_class_identifier))
+ printk(KERN_WARNING "DHCP: vendorclass too long, truncated to \"%s\"",
+ vendor_class_identifier);
+ return 1;
+}
+
__setup("ip=", ip_auto_config_setup);
__setup("nfsaddrs=", nfsaddrs_config_setup);
+__setup("dhcpclass=", vendor_class_identifier_setup);