Initial Contribution

1 files changed, 106 insertions, 0 deletions

diff --git a/libnetutils/dhcpmsg.h b/libnetutils/dhcpmsg.h
new file mode 100644
index 0000000..c86e400
--- /dev/null
+++ b/libnetutils/dhcpmsg.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2008, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); 
+ * you may not use this file except in compliance with the License. 
+ * You may obtain a copy of the License at 
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0 
+ *
+ * Unless required by applicable law or agreed to in writing, software 
+ * distributed under the License is distributed on an "AS IS" BASIS, 
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+
+#ifndef _WIFI_DHCP_H_
+#define _WIFI_DHCP_H_
+
+#include <sys/types.h>
+
+#define PORT_BOOTP_SERVER 67
+#define PORT_BOOTP_CLIENT 68
+
+/* RFC 2131 p 9 */
+typedef struct dhcp_msg dhcp_msg;
+
+#define OP_BOOTREQUEST 1
+#define OP_BOOTREPLY   2
+
+#define FLAGS_BROADCAST 0x8000
+
+#define HTYPE_ETHER    1
+
+struct dhcp_msg
+{
+    uint8_t op;           /* BOOTREQUEST / BOOTREPLY    */
+    uint8_t htype;        /* hw addr type               */
+    uint8_t hlen;         /* hw addr len                */
+    uint8_t hops;         /* client set to 0            */
+    
+    uint32_t xid;         /* transaction id             */
+
+    uint16_t secs;        /* seconds since start of acq */
+    uint16_t flags;
+
+    uint32_t ciaddr;      /* client IP addr             */
+    uint32_t yiaddr;      /* your (client) IP addr      */
+    uint32_t siaddr;      /* ip addr of next server     */
+                          /* (DHCPOFFER and DHCPACK)    */
+    uint32_t giaddr;      /* relay agent IP addr        */
+
+    uint8_t chaddr[16];  /* client hw addr             */
+    char sname[64];      /* asciiz server hostname     */
+    char file[128];      /* asciiz boot file name      */
+
+    uint8_t options[1024];  /* optional parameters        */
+};
+
+#define DHCP_MSG_FIXED_SIZE 236
+
+/* first four bytes of options are a cookie to indicate that
+** the payload are DHCP options as opposed to some other BOOTP
+** extension.
+*/
+#define OPT_COOKIE1          0x63
+#define OPT_COOKIE2          0x82
+#define OPT_COOKIE3          0x53
+#define OPT_COOKIE4          0x63
+
+/* BOOTP/DHCP options - see RFC 2132 */
+#define OPT_PAD              0
+
+#define OPT_SUBNET_MASK      1     /* 4 <ipaddr> */
+#define OPT_TIME_OFFSET      2     /* 4 <seconds> */
+#define OPT_GATEWAY          3     /* 4*n <ipaddr> * n */
+#define OPT_DNS              6     /* 4*n <ipaddr> * n */
+#define OPT_DOMAIN_NAME      15    /* n <domainnamestring> */
+#define OPT_BROADCAST_ADDR   28    /* 4 <ipaddr> */
+
+#define OPT_REQUESTED_IP     50    /* 4 <ipaddr> */
+#define OPT_LEASE_TIME       51    /* 4 <seconds> */
+#define OPT_MESSAGE_TYPE     53    /* 1 <msgtype> */
+#define OPT_SERVER_ID        54    /* 4 <ipaddr> */
+#define OPT_PARAMETER_LIST   55    /* n <optcode> * n */
+#define OPT_MESSAGE          56    /* n <errorstring> */
+#define OPT_CLASS_ID         60    /* n <opaque> */
+#define OPT_CLIENT_ID        61    /* n <opaque> */
+#define OPT_END              255
+
+/* DHCP message types */
+#define DHCPDISCOVER         1
+#define DHCPOFFER            2
+#define DHCPREQUEST          3
+#define DHCPDECLINE          4
+#define DHCPACK              5
+#define DHCPNAK              6
+#define DHCPRELEASE          7
+#define DHCPINFORM           8
+
+int init_dhcp_discover_msg(dhcp_msg *msg, void *hwaddr, uint32_t xid);
+
+int init_dhcp_request_msg(dhcp_msg *msg, void *hwaddr, uint32_t xid,
+                          uint32_t ipaddr, uint32_t serveraddr);
+
+#endif