dhcp_cpi: add dhcp cpi feature

Signed-off-by: staylightblow8 <[email protected]>

src/CMakeLists.txt

@@ -34,6 +34,13 @@ else()
 	)
 endif()
 
+set(src_dhcp
+	dhcp_cpi.c
+	dhcp.c
+	ipv4.c
+	options.c
+)
+
 set(src_wdctlx wdctl.c util.c debug.c)
 
 set(libs 
@@ -74,7 +81,7 @@ if(AW_FW3)
 	add_executable(wifidogx ${src_apfreewifidog} ${src_fw3})
 	target_link_libraries(wifidogx ${libs}  ${fw3_libs} ${CURL_LIBRARIES})
 else()
-	add_executable(wifidogx ${src_apfreewifidog} ${src_fw4})
+	add_executable(wifidogx ${src_apfreewifidog} ${src_fw4} ${src_dhcp})
 	target_link_libraries(wifidogx ${libs} ${CURL_LIBRARIES})
 endif()
 

src/conf.c

@@ -124,6 +124,7 @@ typedef enum {
 	oMQTTPassword,
 	oDNSTimeout,
 	oFW4Enable,
+	oDhcpOptionCpi,
 } OpCodes;
 
 /** @internal
@@ -188,6 +189,7 @@ static const struct {
 	"mqttPassword", oMQTTPassword}, {
 	"dnstimeout",oDNSTimeout},{
 	"fw4enable",oFW4Enable},{
+	"dhcpoptioncpi",oDhcpOptionCpi},{
     NULL, oBadOption},};
 
 static void config_notnull(const void *, const char *);
@@ -1000,6 +1002,9 @@ config_read()
 				case oFW4Enable:
 					config.fw4_enable = parse_boolean_value(p1);
 					break;
+				case oDhcpOptionCpi:
+					config.dhcp_cpi_uri = safe_strdup(p1);
+					break;
 				case oBadOption:
 					/* FALL THROUGH */
 				default:

src/conf.h

@@ -295,6 +295,7 @@ typedef struct {
 	int 	update_domain_interval; /** 0, no need update; otherwise update every update_domain_interval*checkinterval seconds*/
 	char 	* dns_timeout; /*time to limit during of parsing the dns */
 	int 	fw4_enable; /* 1, enable ipv4 firewall */
+	char 	*dhcp_cpi_uri; /* dhcp cpi uri */
 } s_config;
 
 /** @brief Get the current gateway configuration */

src/dhcp.c

@@ -0,0 +1,226 @@
+/* 
+ * Copyright © 2015–2019 Andreas Misje
+ *
+ * This file is part of dhcpoptinj.
+ *
+ * dhcpoptinj is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.  
+ *
+ * dhcpoptinj 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 for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with dhcpoptinj. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "dhcp.h"
+
+const char *dhcp_msgTypeString(uint8_t msgType)
+{
+	switch (msgType)
+	{
+		case 1:
+			return "DHCPDISCOVER";
+		case 2:
+			return "DHCPOFFER";
+		case 3:
+			return "DHCPREQUEST";
+		case 4:
+			return "DHCPDECLINE";
+		case 5:
+			return "DHCPACK";
+		case 6:
+			return "DHCPNAK";
+		case 7:
+			return "DHCPRELEASE";
+		case 8:
+			return "DHCPINFORM";
+		default:
+			return "??";
+	}
+}
+
+const char *dhcp_optionString(uint8_t option)
+{
+	// From https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml
+	static const char * const names[] =
+	{
+		[0]   = "Pad",
+		[1]   = "Subnet Mask",
+		[2]   = "Time Offset",
+		[3]   = "Router",
+		[4]   = "Time Server",
+		[5]   = "Name Server",
+		[6]   = "Domain Server",
+		[7]   = "Log Server",
+		[8]   = "Quotes Server",
+		[9]   = "LPR Server",
+		[10]  = "Impress Server",
+		[11]  = "RLP Server",
+		[12]  = "Hostname",
+		[13]  = "Boot File Size",
+		[14]  = "Merit Dump File",
+		[15]  = "Domain Name",
+		[16]  = "Swap Server",
+		[17]  = "Root Path",
+		[18]  = "Extension File",
+		[19]  = "Forward On/Off",
+		[20]  = "SrcRte On/Off",
+		[21]  = "Policy Filter",
+		[22]  = "Max DG Assembly",
+		[23]  = "Default IP TTL",
+		[24]  = "MTU Timeout",
+		[25]  = "MTU Plateau",
+		[26]  = "MTU Interface",
+		[27]  = "MTU Subnet",
+		[28]  = "Broadcast Address",
+		[29]  = "Mask Discovery",
+		[30]  = "Mask Supplier",
+		[31]  = "Router Discovery",
+		[32]  = "Router Request",
+		[33]  = "Static Route",
+		[34]  = "Trailers",
+		[35]  = "ARP Timeout",
+		[36]  = "Ethernet",
+		[37]  = "Default TCP TTL",
+		[38]  = "Keepalive Time",
+		[39]  = "Keepalive Data",
+		[40]  = "NIS Domain",
+		[41]  = "NIS Servers",
+		[42]  = "NTP Servers",
+		[43]  = "Vendor Specific",
+		[44]  = "NETBIOS Name Srv",
+		[45]  = "NETBIOS Dist Srv",
+		[46]  = "NETBIOS Node Type",
+		[47]  = "NETBIOS Scope",
+		[48]  = "X Window Font",
+		[49]  = "X Window Manager",
+		[50]  = "Address Request",
+		[51]  = "Address Time",
+		[52]  = "Overload",
+		[53]  = "DHCP Msg Type",
+		[54]  = "DHCP Server Id",
+		[55]  = "Parameter List",
+		[56]  = "DHCP Message",
+		[57]  = "DHCP Max Msg Size",
+		[58]  = "Renewal Time",
+		[59]  = "Rebinding Time",
+		[60]  = "Class Id",
+		[61]  = "Client Id",
+		[62]  = "NetWare/IP Domain",
+		[63]  = "NetWare/IP Option",
+		[64]  = "NIS-Domain-Name",
+		[65]  = "NIS-Server-Addr",
+		[66]  = "Server-Name",
+		[67]  = "Bootfile-Name",
+		[68]  = "Home-Agent-Addrs",
+		[69]  = "SMTP-Server",
+		[70]  = "POP3-Server",
+		[71]  = "NNTP-Server",
+		[72]  = "WWW-Server",
+		[73]  = "Finger-Server",
+		[74]  = "IRC-Server",
+		[75]  = "StreetTalk-Server",
+		[76]  = "STDA-Server",
+		[77]  = "User-Class",
+		[78]  = "Directory Agent",
+		[79]  = "Service Scope",
+		[80]  = "Rapid Commit",
+		[81]  = "Client FQDN",
+		[82]  = "Relay Agent Information",
+		[83]  = "iSNS",
+		// 84 removed/unassigned
+		[85]  = "NDS Servers",
+		[86]  = "NDS Tree Name",
+		[87]  = "NDS Context",
+		[88]  = "BCMCS Controller Domain Name list",
+		[89]  = "BCMCS Controller IPv4 address option",
+		[90]  = "Authentication",
+		[91]  = "client-last-transaction-time option",
+		[92]  = "associated-ip option",
+		[93]  = "Client System",
+		[94]  = "Client NDI",
+		[95]  = "LDAP",
+		// 96 removed/unassigned
+		[97]  = "UUID/GUID",
+		[98]  = "User-Auth",
+		[99]  = "GEOCONF_CIVIC",
+		[100] = "PCode",
+		[101] = "TCode",
+		// 102–108 removed/unassigned
+		[109] = "OPTION_DHCP4O6_S46_SADDR",
+		// 110 removed/unassigned
+		// 111 removed/unassigned
+		[112] = "Netinfo Address",
+		[113] = "Netinfo Tag",
+		[114] = "URL",
+		// 115 removed/unassigned
+		[116] = "Auto-Config",
+		[117] = "Name Service Search",
+		[118] = "Subnet Selection Option",
+		[119] = "Domain Search",
+		[120] = "SIP Servers DHCP Option",
+		[121] = "Classless Static Route Option",
+		[122] = "CCC",
+		[123] = "GeoConf Option",
+		[124] = "V-I Vendor Class",
+		[125] = "V-I Vendor-Specific Information",
+		// 126 removed/unassigned
+		// 127 removed/unassigned
+		[128] = "PXE / Etherboot signature",
+		[129] = "PXE / Kernel options / Call Server IP address",
+		[130] = "PXE / Ethernet interface / Discrimination string",
+		[131] = "PXE / Remote statistics server IP address",
+		[132] = "PXE",
+		[133] = "PXE",
+		[134] = "PXE",
+		[135] = "PXE / HTTP Proxy for phone-specific applications",
+		[136] = "OPTION_PANA_AGENT",
+		[137] = "OPTION_V4_LOST",
+		[138] = "OPTION_CAPWAP_AC_V4",
+		[139] = "OPTION-IPv4_Address-MoS",
+		[140] = "OPTION-IPv4_FQDN-MoS",
+		[141] = "SIP UA Configuration Service Domains",
+		[142] = "OPTION-IPv4_Address-ANDSF",
+		[143] = "OPTION_V4_SZTP_REDIRECT",
+		[144] = "GeoLoc",
+		[145] = "FORCERENEW_NONCE_CAPABLE",
+		[146] = "RDNSS Selection",
+		// 147–149 unassigned
+		[150] = "TFTP server address / Etherboot / GRUB configuration path name",
+		[151] = "status-code",
+		[152] = "base-time",
+		[153] = "start-time-of-state",
+		[154] = "query-start-time",
+		[155] = "query-end-time",
+		[156] = "dhcp-state",
+		[157] = "data-source",
+		[158] = "OPTION_V4_PCP_SERVER",
+		[159] = "OPTION_V4_PORTPARAMS",
+		[160] = "DHCP Captive-Portal",
+		[161] = "OPTION_MUD_URL_V4",
+		// 162–174 unassigned
+		[175] = "Etherboot",
+		[176] = "IP Telephone",
+		[177] = "Etherboot / PacketCable and CableHome",
+		// 178–207 unassigned
+		[208] = "PXELINUX Magic",
+		[209] = "Configuration File",
+		[210] = "Path Prefix",
+		[211] = "Reboot Time",
+		[212] = "OPTION_6RD",
+		[213] = "OPTION_V4_ACCESS_DOMAIN",
+		// 214–219 unassigned
+		[220] = "Subnet Allocation Option",
+		[221] = "Virtual Subnet Selection (VSS) Option",
+		// 222–223 unassigned
+		// 224–254 reserved
+		[255] = "End",
+	};
+
+	return names[option] ? names[option] : "(unassigned/reserved)";
+}

src/dhcp.h

@@ -0,0 +1,64 @@
+/* 
+ * Copyright © 2015–2019 Andreas Misje
+ *
+ * This file is part of dhcpoptinj.
+ *
+ * dhcpoptinj is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.  
+ *
+ * dhcpoptinj 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 for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with dhcpoptinj. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef DHCPOPTINJ_DHCP_H
+#define DHCPOPTINJ_DHCP_H
+
+#include <stdint.h>
+
+#define DHCP_MAGIC_COOKIE 0x63825363
+#define DHCPOPT_PAD 0
+#define DHCPOPT_END 0xff
+#define DHCPOPT_TYPE 0x35
+
+#pragma pack(4)
+struct BootP
+{
+	uint8_t op;
+	uint8_t hwAddrType;
+	uint8_t hwAddrLen;
+	uint8_t hops;
+	uint32_t xID;
+	uint16_t secs;
+	uint16_t flags;
+	uint32_t clientAddr;
+	uint32_t ownAddr;
+	uint32_t serverAddr;
+	uint32_t gwAddr;
+	uint8_t clientHwAddr[16];
+	uint8_t serverName[64];
+	uint8_t file[128];
+	uint32_t cookie;
+	// options …
+};
+#pragma pack()
+
+#pragma pack(1)
+struct DHCPOption
+{
+	uint8_t code;
+	uint8_t length;
+	uint8_t data[];
+};
+#pragma pack()
+
+const char *dhcp_msgTypeString(uint8_t msgType);
+const char *dhcp_optionString(uint8_t option);
+
+#endif // DHCPOPTINJ_DHCP_H