For net boot setups it is useful to submit boot params like server or
bootfile over dhcp. To distinguish diffrent type of OS running on the same hardware,
a custom vendor id can be sent in dhcp discover/request messages.
E.g. the ISC dhcp server can be configured with
| option client-uuid code 97 = { unsigned integer 8, string };
| class "at91sam9x5ek" {
| match if substring (option vendor-class-identifier,0,20) = "barebox-at91sam9x5ek";
|
| filename "/tftpboot/atmel/at91sam9x5/sam9x5ek/zImage";
| if substring (option dhcp-client-identifier,0,7) = "ser2net" {
| filename "/tftpboot/atmel/at91sam9x5/sam9x5ek/zImage-ser2net";
| }
| if substring (option client-uuid,0,7) = "test" {
| filename "/tftpboot/atmel/at91sam9x5/sam9x5ek/zImage-ser2net";
| }
| if substring (option user-class,0,4) = "toto" {
| filename "/tftpboot/atmel/at91sam9x5/sam9x5ek/zImage-toto";
| }
| option tftp-server-name "192.168.200.98";
| option option-150 192.168.200.98;
| next-server 192.168.200.98;
| option root-path "192.168.200.98:/opt/work/buildroot/build/sam9x5/target";
| }
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
---
net/dhcp.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/net/dhcp.c b/net/dhcp.c
index ae4bdd0..4c3b9a3 100644
--- a/net/dhcp.c
+++ b/net/dhcp.c
@@ -78,6 +78,7 @@ static uint64_t dhcp_start;
static char *client_id;
static char *vendor_id;
static char *client_uuid;
+static char *user_class;
static int bootp_check_packet(unsigned char *pkt, unsigned src, unsigned len)
{
@@ -193,6 +194,7 @@ static int dhcp_extended (u8 *e, int message_type, IPaddr_t ServerID,
e += dhcp_set_string_options(e, 60, vendor_id);
e += dhcp_set_string_options(e, 61, client_id);
+ e += dhcp_set_string_options(e, 77, user_class);
e += dhcp_set_string_options(e, 97, client_uuid);
*e++ = 55; /* Parameter Request List */
@@ -494,6 +496,7 @@ static int do_dhcp(int argc, char *argv[])
vendor_id = (char*)getenv("dhcp_vendor_id");
client_id = (char*)getenv("dhcp_client_id");
client_uuid = (char*)getenv("dhcp_client_uuid");
+ user_class = (char*)getenv("dhcp_user_class");
setenv("bootfile","");
setenv("nameserver","");
@@ -504,7 +507,7 @@ static int do_dhcp(int argc, char *argv[])
setenv("tftp_server_ip","");
setenv("etherboot_file","");
- while((opt = getopt(argc, argv, "v:c:u:")) > 0) {
+ while((opt = getopt(argc, argv, "v:c:u:U:")) > 0) {
switch(opt) {
case 'v':
vendor_id = optarg;
@@ -515,12 +518,16 @@ static int do_dhcp(int argc, char *argv[])
case 'u':
client_uuid = optarg;
break;
+ case 'U':
+ user_class = optarg;
+ break;
}
}
pr_debug("vendor_id: '%s'\n", vendor_id);
pr_debug("client_id: '%s'\n", client_id);
pr_debug("client_uuid: '%s'\n", client_uuid);
+ pr_debug("user_class: '%s'\n", user_class);
dhcp_con = net_udp_new(0xffffffff, PORT_BOOTPS, dhcp_handler, NULL);
if (IS_ERR(dhcp_con)) {
@@ -574,6 +581,10 @@ BAREBOX_CMD_HELP_OPT ("-c <client_id>",
BAREBOX_CMD_HELP_OPT ("-u <client_uuid>",
"DHCP Client UUID (code 97) submitted in DHCP requests. It can\n"
"be used in the DHCP server's configuration to select options\n"
+"(e.g. bootfile or server) which are valid for barebox clients only.\n")
+BAREBOX_CMD_HELP_OPT ("-U <user_class>",
+"DHCP User class (code 77) submitted in DHCP requests. It can\n"
+"be used in the DHCP server's configuration to select options\n"
"(e.g. bootfile or server) which are valid for barebox clients only.\n");
BAREBOX_CMD_HELP_END
@@ -591,6 +602,7 @@ BAREBOX_MAGICVAR(rootpath, "rootpath returned from DHCP request");
BAREBOX_MAGICVAR(dhcp_vendor_id, "vendor id to send to the DHCP server");
BAREBOX_MAGICVAR(dhcp_client_uuid, "cliend uuid to send to the DHCP server");
BAREBOX_MAGICVAR(dhcp_client_id, "cliend id to send to the DHCP server");
+BAREBOX_MAGICVAR(dhcp_user_class, "user class to send to the DHCP server");
BAREBOX_MAGICVAR(tftp_server_name, "TFTP server Name returned from DHCP request");
BAREBOX_MAGICVAR(tftp_server_ip, "TFTP server IP returned from DHCP request");
BAREBOX_MAGICVAR(etherboot_file, "Etherboot File returned from DHCP request");
--
1.7.9.1
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