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kvm tools: Introduce uip_tx_do_ipv4_udp_dhcp()

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uip_tx_do_ipv4_udp_dhcp() is used to handle DHCP packages from guest.

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 155c7f336c
commit bcd315db17
2 changed files with 42 additions and 0 deletions
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include/kvm/uip.h
+4
View File
@@ -29,6 +29,8 @@
#define UIP_TCP_FLAG_ACK 16
#define UIP_TCP_FLAG_URG 32
#define UIP_BOOTP_VENDOR_SPECIFIC_LEN 64
#define UIP_BOOTP_MAX_PAYLOAD_LEN 300
#define UIP_DHCP_VENDOR_SPECIFIC_LEN 312
#define UIP_DHCP_PORT_SERVER 67
#define UIP_DHCP_PORT_CLIENT 68
@@ -38,6 +40,7 @@
#define UIP_DHCP_MAGIC_COOKIE 0x63825363
#define UIP_DHCP_MAGIC_COOKIE_LEN 4
#define UIP_DHCP_LEASE_TIME 0x00003840
#define UIP_DHCP_MAX_PAYLOAD_LEN (UIP_BOOTP_MAX_PAYLOAD_LEN - UIP_BOOTP_VENDOR_SPECIFIC_LEN + UIP_DHCP_VENDOR_SPECIFIC_LEN)
#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
@@ -328,6 +331,7 @@ int uip_tx(struct iovec *iov, u16 out, struct uip_info *info);
int uip_rx(struct iovec *iov, u16 in, struct uip_info *info);
int uip_init(struct uip_info *info);
int uip_tx_do_ipv4_udp_dhcp(struct uip_tx_arg *arg);
int uip_tx_do_ipv4_icmp(struct uip_tx_arg *arg);
int uip_tx_do_ipv4_tcp(struct uip_tx_arg *arg);
int uip_tx_do_ipv4_udp(struct uip_tx_arg *arg);
net/uip/dhcp.c
+38
View File
@@ -155,3 +155,41 @@ static int uip_dhcp_make_pkg(struct uip_info *info, struct uip_udp_socket *sk, s
return 0;
}
int uip_tx_do_ipv4_udp_dhcp(struct uip_tx_arg *arg)
{
struct uip_udp_socket sk;
struct uip_dhcp *dhcp;
struct uip_info *info;
struct uip_buf *buf;
u8 reply_msg_type;
dhcp = (struct uip_dhcp *)arg->eth;
if (uip_dhcp_is_discovery(dhcp))
reply_msg_type = UIP_DHCP_OFFER;
else if (uip_dhcp_is_request(dhcp))
reply_msg_type = UIP_DHCP_ACK;
else
return -1;
buf = uip_buf_clone(arg);
info = arg->info;
/*
* Cook DHCP pkg
*/
uip_dhcp_make_pkg(info, &sk, buf, reply_msg_type);
/*
* Cook UDP pkg
*/
uip_udp_make_pkg(info, &sk, buf, NULL, UIP_DHCP_MAX_PAYLOAD_LEN);
/*
* Send data received from socket to guest
*/
uip_buf_set_used(info, buf);
return 0;
}