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kvm tools: Fill all DHCP options

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The following DHCP options are filled.

   - MSG_TYPE

   - SERVER_ID

   - LEASE_TIME

   - SUBMASK

   - ROUTER

   - DNS_SERVER

   - DOMAIN_NAME

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Asias He
2015-06-01 16:39:46 +01:00
committed by Will Deacon
parent 32a44aaf03
commit ab8d80a615
2 changed files with 54 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/kvm/uip.h
+12
View File
@@ -37,6 +37,7 @@
#define UIP_DHCP_FILENAME_LEN 128
#define UIP_DHCP_MAGIC_COOKIE 0x63825363
#define UIP_DHCP_MAGIC_COOKIE_LEN 4
#define UIP_DHCP_LEASE_TIME 0x00003840
#define UIP_DHCP_OPTION_LEN (UIP_DHCP_VENDOR_SPECIFIC_LEN - UIP_DHCP_MAGIC_COOKIE_LEN)
#define UIP_DHCP_DISCOVER 1
#define UIP_DHCP_OFFER 2
@@ -46,9 +47,18 @@
#define UIP_DHCP_MAX_DOMAIN_NAME_LEN 256
#define UIP_DHCP_TAG_MSG_TYPE 53
#define UIP_DHCP_TAG_MSG_TYPE_LEN 1
#define UIP_DHCP_TAG_SERVER_ID 54
#define UIP_DHCP_TAG_SERVER_ID_LEN 4
#define UIP_DHCP_TAG_LEASE_TIME 51
#define UIP_DHCP_TAG_LEASE_TIME_LEN 4
#define UIP_DHCP_TAG_SUBMASK 1
#define UIP_DHCP_TAG_SUBMASK_LEN 4
#define UIP_DHCP_TAG_ROUTER 3
#define UIP_DHCP_TAG_ROUTER_LEN 4
#define UIP_DHCP_TAG_DNS_SERVER 6
#define UIP_DHCP_TAG_DNS_SERVER_LEN 4
#define UIP_DHCP_TAG_DOMAIN_NAME 15
#define UIP_DHCP_TAG_END 255
/*
* IP package maxium len == 64 KBytes
@@ -183,6 +193,8 @@ struct uip_info {
int udp_epollfd;
int buf_free_nr;
int buf_used_nr;
u32 guest_ip;
u32 guest_netmask;
u32 host_ip;
u32 dns_ip[UIP_DHCP_MAX_DNS_SERVER_NR];
char *domain_name;
net/uip/dhcp.c
+42
View File
@@ -91,3 +91,45 @@ static int uip_dhcp_fill_option_name_and_server(struct uip_info *info, u8 *opt,
return i;
}
static int uip_dhcp_fill_option(struct uip_info *info, struct uip_dhcp *dhcp, int reply_msg_type)
{
int i = 0;
u32 *addr;
u8 *opt;
opt = dhcp->option;
opt[i++] = UIP_DHCP_TAG_MSG_TYPE;
opt[i++] = UIP_DHCP_TAG_MSG_TYPE_LEN;
opt[i++] = reply_msg_type;
opt[i++] = UIP_DHCP_TAG_SERVER_ID;
opt[i++] = UIP_DHCP_TAG_SERVER_ID_LEN;
addr = (u32 *)&opt[i];
*addr = htonl(info->host_ip);
i += UIP_DHCP_TAG_SERVER_ID_LEN;
opt[i++] = UIP_DHCP_TAG_LEASE_TIME;
opt[i++] = UIP_DHCP_TAG_LEASE_TIME_LEN;
addr = (u32 *)&opt[i];
*addr = htonl(UIP_DHCP_LEASE_TIME);
i += UIP_DHCP_TAG_LEASE_TIME_LEN;
opt[i++] = UIP_DHCP_TAG_SUBMASK;
opt[i++] = UIP_DHCP_TAG_SUBMASK_LEN;
addr = (u32 *)&opt[i];
*addr = htonl(info->guest_netmask);
i += UIP_DHCP_TAG_SUBMASK_LEN;
opt[i++] = UIP_DHCP_TAG_ROUTER;
opt[i++] = UIP_DHCP_TAG_ROUTER_LEN;
addr = (u32 *)&opt[i];
*addr = htonl(info->host_ip);
i += UIP_DHCP_TAG_ROUTER_LEN;
i = uip_dhcp_fill_option_name_and_server(info, opt, i);
opt[i++] = UIP_DHCP_TAG_END;
return 0;
}