summaryrefslogtreecommitdiffstats
path: root/src/vnet/dhcp/dhcp6_proxy_node.c
diff options
context:
space:
mode:
authorJohn Lo <loj@cisco.com>2017-11-14 13:19:26 -0500
committerDave Barach <openvpp@barachs.net>2017-11-16 11:25:51 +0000
commit70bfcaf47779340951c1e6f169b1cedcabe708d1 (patch)
treeb6e1378942f278e914b7139d1210562d943cb680 /src/vnet/dhcp/dhcp6_proxy_node.c
parent9d72120a6986e642c5b16c8650ad266188adf142 (diff)
Add Support of DHCP VSS Type 0 where VPN-ID is ASCII
Enhence support of DHCP VSS (Virtual Subnet Selection) to include VSS type 0 where VSS info is a NVT (Network Virtual Terminal) ASCII VPN ID where the ASCII string MUST NOT be terminated with a zero byte. Existing code already support VSS type 1, where VSS information is a RFC 2685 VPN-ID of 7 bytes with 3 bytes OUI and 4 bytes VPN index, and VSS type 255 indicating global VPN. Change-Id: I54edbc447c89a2aacd1cc9fc72bd5ba386037608 Signed-off-by: John Lo <loj@cisco.com>
Diffstat (limited to 'src/vnet/dhcp/dhcp6_proxy_node.c')
-rw-r--r--src/vnet/dhcp/dhcp6_proxy_node.c97
1 files changed, 47 insertions, 50 deletions
diff --git a/src/vnet/dhcp/dhcp6_proxy_node.c b/src/vnet/dhcp/dhcp6_proxy_node.c
index ce7a8fca3bc..3cac278aa53 100644
--- a/src/vnet/dhcp/dhcp6_proxy_node.c
+++ b/src/vnet/dhcp/dhcp6_proxy_node.c
@@ -330,31 +330,40 @@ dhcpv6_proxy_to_server_input (vlib_main_t * vm,
cmac = (dhcpv6_client_mac_t *) (((uword) ip1) + b0->current_length);
b0->current_length += (sizeof (*cmac));
cmac->opt.length =clib_host_to_net_u16(sizeof(*cmac) -
- sizeof(cmac->opt));
+ sizeof(cmac->opt));
cmac->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_CLIENT_LINK_LAYER_ADDRESS);
- cmac->link_type = clib_host_to_net_u16(1); // ethernet
+ cmac->link_type = clib_host_to_net_u16(1); /* ethernet */
clib_memcpy(cmac->data, client_src_mac, 6);
u1->length += sizeof(*cmac);
}
vss = dhcp_get_vss_info(dpm, rx_fib_idx, FIB_PROTOCOL_IP6);
- if (NULL != vss) {
+ if (vss)
+ {
+ u16 id_len; /* length of VPN ID */
+ u16 type_len = sizeof (vss1->vss_type);
+
vss1 = (dhcpv6_vss_t *) (((uword) ip1) + b0->current_length);
- b0->current_length += (sizeof (*vss1));
- vss1->opt.length =clib_host_to_net_u16(sizeof(*vss1) -
- sizeof(vss1->opt));
- vss1->opt.option = clib_host_to_net_u16(DHCPV6_OPTION_VSS);
- vss1->data[0] = 1; // type
- vss1->data[1] = vss->oui >>16 & 0xff;
- vss1->data[2] = vss->oui >>8 & 0xff;
- vss1->data[3] = vss->oui & 0xff;
- vss1->data[4] = vss->fib_id >> 24 & 0xff;
- vss1->data[5] = vss->fib_id >> 16 & 0xff;
- vss1->data[6] = vss->fib_id >> 8 & 0xff;
- vss1->data[7] = vss->fib_id & 0xff;
- u1->length += sizeof(*vss1);
- }
+ vss1->vss_type = vss->vss_type;
+ if (vss->vss_type == VSS_TYPE_VPN_ID)
+ {
+ id_len = sizeof (vss->vpn_id); /* vpn_id is 7 bytes */
+ memcpy (vss1->data, vss->vpn_id, id_len);
+ }
+ else if (vss->vss_type == VSS_TYPE_ASCII)
+ {
+ id_len = vec_len (vss->vpn_ascii_id);
+ memcpy (vss1->data, vss->vpn_ascii_id, id_len);
+ }
+ else /* must be VSS_TYPE_DEFAULT, no VPN ID */
+ id_len = 0;
+
+ vss1->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_VSS);
+ vss1->opt.length = clib_host_to_net_u16 (type_len + id_len);
+ u1->length += type_len + id_len + sizeof (vss1->opt);
+ b0->current_length += type_len + id_len + sizeof (vss1->opt);
+ }
pkts_to_server++;
u1->checksum = 0;
@@ -1030,18 +1039,20 @@ dhcpv6_vss_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
- int is_del = 0, got_new_vss=0;
- u32 oui=0;
- u32 fib_id=0, tbl_id=~0;
+ u8 is_del = 0, vss_type = VSS_TYPE_DEFAULT;
+ u8 *vpn_ascii_id = 0;
+ u32 oui = 0, fib_id = 0, tbl_id = ~0;
while (unformat_check_input(input) != UNFORMAT_END_OF_INPUT)
{
- if (unformat (input, "oui %d", &oui))
- got_new_vss = 1;
+ if (unformat (input, "table %d", &tbl_id))
+ ;
+ else if (unformat (input, "oui %d", &oui))
+ vss_type = VSS_TYPE_VPN_ID;
else if (unformat (input, "vpn-id %d", &fib_id))
- got_new_vss = 1;
- else if (unformat (input, "table %d", &tbl_id))
- got_new_vss = 1;
+ vss_type = VSS_TYPE_VPN_ID;
+ else if (unformat (input, "vpn-ascii-id %s", &vpn_ascii_id))
+ vss_type = VSS_TYPE_ASCII;
else if (unformat(input, "delete") || unformat(input, "del"))
is_del = 1;
else
@@ -1051,37 +1062,23 @@ dhcpv6_vss_command_fn (vlib_main_t * vm,
if (tbl_id ==~0)
return clib_error_return (0, "no table ID specified.");
- if (is_del || got_new_vss)
+ int rv = dhcp_proxy_set_vss(FIB_PROTOCOL_IP6, tbl_id, vss_type,
+ vpn_ascii_id, oui, fib_id, is_del);
+ switch (rv)
{
- int rv;
-
- rv = dhcp_proxy_set_vss(FIB_PROTOCOL_IP6, tbl_id, oui, fib_id, is_del);
- switch (rv)
- {
- case 0:
- return 0;
-
- case VNET_API_ERROR_NO_SUCH_FIB:
- return clib_error_return (0, "vss info (oui:%d, vpn-id:%d) not found in table %d.",
- oui, fib_id, tbl_id);
-
- case VNET_API_ERROR_NO_SUCH_ENTRY:
- return clib_error_return (0, "vss for table %d not found in pool.",
- tbl_id);
-
- default:
- return clib_error_return (0, "BUG: rv %d", rv);
- }
+ case 0:
+ return 0;
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ return clib_error_return (0, "vss for table %d not found in pool.",
+ tbl_id);
+ default:
+ return clib_error_return (0, "BUG: rv %d", rv);
}
- else
- return clib_error_return (0, "parse error`%U'",
- format_unformat_error, input);
-
}
VLIB_CLI_COMMAND (dhcpv6_proxy_vss_command, static) = {
.path = "set dhcpv6 vss",
- .short_help = "set dhcpv6 vss table <table-id> oui <oui> vpn-idx <vpn-idx>",
+ .short_help = "set dhcpv6 vss table <table-id> [oui <n> vpn-id <n> | vpn-ascii-id <text>]",
.function = dhcpv6_vss_command_fn,
};