1 files changed, 93 insertions, 0 deletions
diff --git a/src/dhcpv4.h b/src/dhcpv4.h
new file mode 100644
index 0000000..308cc53
--- /dev/null
+++ b/src/dhcpv4.h
@@ -0,0 +1,93 @@
+/**
+ *   Copyright (C) 2012 Steven Barth <steven@midlink.org>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License version 2
+ *   as published by the Free Software Foundation.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License version 2 for more details.
+ *
+ */
+#pragma once
+
+#define DHCPV4_CLIENT_PORT 68
+#define DHCPV4_SERVER_PORT 67
+
+#define DHCPV4_FLAG_BROADCAST  0x8000
+
+enum dhcpv4_op {
+	DHCPV4_BOOTREQUEST = 1,
+	DHCPV4_BOOTREPLY = 2
+};
+
+enum dhcpv4_msg {
+	DHCPV4_MSG_DISCOVER = 1,
+	DHCPV4_MSG_OFFER = 2,
+	DHCPV4_MSG_REQUEST = 3,
+	DHCPV4_MSG_DECLINE = 4,
+	DHCPV4_MSG_ACK = 5,
+	DHCPV4_MSG_NAK = 6,
+	DHCPV4_MSG_RELEASE = 7,
+	DHCPV4_MSG_INFORM = 8,
+};
+
+enum dhcpv4_opt {
+	DHCPV4_OPT_NETMASK = 1,
+	DHCPV4_OPT_ROUTER = 3,
+	DHCPV4_OPT_DNSSERVER = 6,
+	DHCPV4_OPT_DOMAIN = 15,
+	DHCPV4_OPT_MTU = 26,
+	DHCPV4_OPT_BROADCAST = 28,
+	DHCPV4_OPT_NTPSERVER = 42,
+	DHCPV4_OPT_LEASETIME = 51,
+	DHCPV4_OPT_MESSAGE = 53,
+	DHCPV4_OPT_SERVERID = 54,
+	DHCPV4_OPT_RENEW = 58,
+	DHCPV4_OPT_REBIND = 59,
+	DHCPV4_OPT_IPADDRESS = 50,
+	DHCPV4_OPT_HOSTNAME = 10,
+	DHCPV4_OPT_REQUEST = 17,
+	DHCPV4_OPT_END = 255,
+};
+
+struct dhcpv4_message {
+	uint8_t op;
+	uint8_t htype;
+	uint8_t hlen;
+	uint8_t hops;
+	uint32_t xid;
+	uint16_t secs;
+	uint16_t flags;
+	struct in_addr ciaddr;
+	struct in_addr yiaddr;
+	struct in_addr siaddr;
+	struct in_addr giaddr;
+	uint8_t chaddr[16];
+	char sname[64];
+	char file[128];
+	uint8_t options[312];
+};
+
+struct dhcpv4_assignment {
+	struct list_head head;
+	uint32_t addr;
+	time_t valid_until;
+	uint8_t hwaddr[6];
+	char hostname[];
+};
+
+struct dhcpv4_option {
+	uint8_t type;
+	uint8_t len;
+	uint8_t data[];
+};
+
+
+#define dhcpv4_for_each_option(start, end, opt)\
+	for (opt = (struct dhcpv4_option*)(start); \
+		&opt[1] <= (struct dhcpv4_option*)(end) && \
+			&opt->data[opt->len] <= (end); \
+		opt = (struct dhcpv4_option*)&opt->data[opt->len])