uip_tx_do_ipv4_udp_dhcp() is used to handle DHCP packages from guest.
Signed-off-by: Asias He <asias.hejun@xxxxxxxxx>
---
tools/kvm/include/kvm/uip.h | 4 ++++
tools/kvm/net/uip/dhcp.c | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/include/kvm/uip.h b/tools/kvm/include/kvm/uip.h
index e6b1285..344ec09 100644
--- a/tools/kvm/include/kvm/uip.h
+++ b/tools/kvm/include/kvm/uip.h
@@ -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);
diff --git a/tools/kvm/net/uip/dhcp.c b/tools/kvm/net/uip/dhcp.c
index 612e024..865b376 100644
--- a/tools/kvm/net/uip/dhcp.c
+++ b/tools/kvm/net/uip/dhcp.c
@@ -154,3 +154,41 @@ 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;
+}
--
1.7.5.4
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