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// ********************************************************************************************************
// Servicio: ogAdmBoot
// Autor: José Manuel Alonso (E.T.S.I.I.) Universidad de Sevilla
// Fecha Creación: Julio-2010
// Fecha Última modificación: Julio-2010
// Nombre del fichero: ogAdmBoot.cpp
// Descripción :Este fichero implementa el servicio dhcp y tftp propios del sistema
// ********************************************************************************************************
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include </usr/include/mysql/mysql.h>
#include <pthread.h>
#include "Database.h"
#include "ogAdmLib.h"
// _____________________________________________________________________________________________________________
#define PUERTODHCPORIGEN 67
#define PUERTODHCPDESTINO 68
#define PUERTOBOOTPORIGEN 4011
#define PUERTOBOOTPDESTINO 68
#define PUERTOTFTPORIGEN 69
#define PUERTOMINUSER 20000
#define PUERTOMAXUSER 60000
#define MAX_INTERFACE_LIST 20
#define MAX_NUM_CSADDRS 20
// _____________________________________________________________________________________________________________
#define DHCP_UDP_OVERHEAD (20 + 8 ) // IP header + UDP header
#define DHCP_SNAME_LEN 64
#define DHCP_FILE_LEN 128
#define DHCP_FIXED_NON_UDP 236
#define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD) // Longitud de la trama sin las opciones
#define DHCP_MTU_MAX 1500
#define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
#define BOOTP_MIN_LEN 300
#define DHCP_MIN_LEN 548
struct dhcp_packet {
unsigned char op; // Message opcode
unsigned char htype; // Hardware addr type
unsigned char hlen; // Hardware addr length
unsigned char hops; // Number of relay agent hops from client
unsigned long xid; // Transaction ID
unsigned short secs; // Seconds since client started looking
unsigned short flags; // Flag bits
struct in_addr ciaddr; // Client IP address
struct in_addr yiaddr; // Client IP address
struct in_addr siaddr; // IP address of next server
struct in_addr giaddr; // DHCP relay agent IP address
unsigned char chaddr [16];// Client hardware address
char sname[DHCP_SNAME_LEN]; // Server name
char file[DHCP_FILE_LEN]; // Boot filename
unsigned char magiccookie[4];
unsigned char options [DHCP_OPTION_LEN-4]; // Optional parameters.
};
// Estructura genrica de una opcin DHCP
struct dhcp_opcion {
unsigned char codop;
unsigned char tam;
unsigned char dato;
};
// Cdigo de las distintas opciones DHCP
#define DHCP_PAD 0
#define DHCP_SUBNET_MASK 1
#define DHCP_TIME_OFFSET 2
#define DHCP_ROUTERS 3
#define DHCP_TIME_SERVERS 4
#define DHCP_NAME_SERVERS 5
#define DHCP_DOMAIN_NAME_SERVERS 6
#define DHCP_LOG_SERVERS 7
#define DHCP_COOKIE_SERVERS 8
#define DHCP_LPR_SERVERS 9
#define DHCP_IMPRESS_SERVERS 10
#define DHCP_RESOURCE_LOCATION_SERVERS 11
#define DHCP_HOST_NAME 12
#define DHCP_BOOT_SIZE 13
#define DHCP_MERIT_DUMP 14
#define DHCP_DOMAIN_NAME 15
#define DHCP_SWAP_SERVER 16
#define DHCP_ROOT_PATH 17
#define DHCP_EXTENSIONS_PATH 18
#define DHCP_IP_FORWARDING 19
#define DHCP_NON_LOCAL_SOURCE_ROUTING 20
#define DHCP_POLICY_FILTER 21
#define DHCP_MAX_DGRAM_REASSEMBLY 22
#define DHCP_DEFAULT_IP_TTL 23
#define DHCP_PATH_MTU_AGING_TIMEOUT 24
#define DHCP_PATH_MTU_PLATEAU_TABLE 25
#define DHCP_INTERFACE_MTU 26
#define DHCP_ALL_SUBNETS_LOCAL 27
#define DHCP_BROADCAST_ADDRESS 28
#define DHCP_PERFORM_MASK_DISCOVERY 29
#define DHCP_MASK_SUPPLIER 30
#define DHCP_ROUTER_DISCOVERY 31
#define DHCP_ROUTER_SOLICITATION_ADDRESS 32
#define DHCP_STATIC_ROUTES 33
#define DHCP_TRAILER_ENCAPSULATION 34
#define DHCP_ARP_CACHE_TIMEOUT 35
#define DHCP_IEEE802_3_ENCAPSULATION 36
#define DHCP_DEFAULT_TCP_TTL 37
#define DHCP_TCP_KEEPALIVE_INTERVAL 38
#define DHCP_TCP_KEEPALIVE_GARBAGE 39
#define DHCP_NIS_DOMAIN 40
#define DHCP_NIS_SERVERS 41
#define DHCP_NTP_SERVERS 42
#define DHCP_VENDOR_ENCAPSULATED_OPTIONS 43
#define DHCP_NETBIOS_NAME_SERVERS 44
#define DHCP_NETBIOS_DD_SERVER 45
#define DHCP_NETBIOS_NODE_TYPE 46
#define DHCP_NETBIOS_SCOPE 47
#define DHCP_FONT_SERVERS 48
#define DHCP_X_DISPLAY_MANAGER 49
#define DHCP_REQUESTED_ADDRESS 50
#define DHCP_LEASE_TIME 51
#define DHCP_OPTION_OVERLOAD 52
#define DHCP_MESSAGE_TYPE 53
#define DHCP_SERVER_IDENTIFIER 54
#define DHCP_PARAMETER_REQUEST_LIST 55
#define DHCP_MESSAGE 56
#define DHCP_MAX_MESSAGE_SIZE 57
#define DHCP_RENEWAL_TIME 58
#define DHCP_REBINDING_TIME 59
#define DHCP_CLASS_IDENTIFIER 60
#define DHCP_CLIENT_IDENTIFIER 61
#define DHCP_USER_CLASS_ID 77
#define DHCP_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
// Estructura para trabajar en cada hebra con el cliente en cuestion
struct TramaDhcpBootp{
SOCKET sck;
struct sockaddr_in cliente;
socklen_t sockaddrsize;
struct dhcp_packet pckDchp;
char bdIP[16];
};
// _____________________________________________________________________________________________________________
#define MAXBLOCK 4096
// TFTP Cdigos de operacin.
#define TFTPRRQ 1 // Read request.
#define TFTPWRQ 2 // Write request
#define TFTPDATA 3 // Read or write the next block of data.
#define TFTPACK 4 // Confirnacin de bloque procesado
#define TFTPERROR 5 // Error message
#define TFTPOACK 6 // Option acknowledgment
// Paquete TFTP genrico
struct tftp_packet
{
WORD opcode;
char buffer[MAXBLOCK+2];
};
// Paquete TFTP tipo ACK
struct tftppacket_ack
{
WORD opcode;
WORD block;
char buffer[MAXBLOCK];
};
// Paquete TFTP tipo ERROR packet
struct tftppacket_error
{
WORD opcode;
WORD errorcode;
char errormessage[508];
};
// Estructura para trabajar en cada hebra con el cliente en cuestion
struct TramaTftp{
SOCKET sck;
struct sockaddr_in cliente;
socklen_t sockaddrsize;
struct tftp_packet pckTftp;
FILE * fileboot;
int bloquesize;
int tsize;
int interval;
int numblock;
unsigned short currentopCode;
};
//______________________________________________________
static pthread_mutex_t guardia; // Controla acceso exclusivo de hebras
//______________________________________________________
char IPlocal[LONPRM];
char usuario[LONPRM];
char pasguor[LONPRM];
char datasource[LONPRM];
char catalog[LONPRM];
char router[LONPRM];
char mascara[LONPRM];
char oProuter[LONPRM];
char oPmascara[LONPRM];
// Prototipo de funciones
void RegistraLog(char *,int);
int TomaParametrosReg();
LPVOID ServicioDHCP(LPVOID);
LPVOID ServicioBOOTP(LPVOID);
LPVOID ServicioTFTP(LPVOID);
LPVOID GestionaServicioDHCP(LPVOID);
LPVOID GestionaServicioBOOTP(LPVOID);
LPVOID GestionaServicioTFTP(LPVOID);
int ClienteExistente(struct TramaDhcpBootp *,char*,int);
int OpcionesPresentes(unsigned char *);
unsigned char * BuscaOpcion(dhcp_packet* ,unsigned char );
int OpcionPXEClient(dhcp_packet* );
void ProcesaTramaClientePXE(struct TramaDhcpBootp* trmInfo);
void ProcesaTramaClienteDHCP(struct TramaDhcpBootp* trmInfo);
void ProcesaTramaClienteBOOTP(struct TramaDhcpBootp* trmInfo);
void ProcesaTramaClienteTFTP(struct TramaTftp * trmInfo);
void RellenaIPCLiente(struct TramaDhcpBootp*);
void RellenaIPServidor(struct TramaDhcpBootp*);
void dhcpDISCOVER_PXE(struct TramaDhcpBootp*);
void dhcpREQUEST_PXE(struct TramaDhcpBootp*);
void bootpREQUEST_PXE(struct TramaDhcpBootp*);
int PeticionFichero(struct TramaTftp*);
void AdjDHCPOFFER(unsigned char**,int*);
void AdjDHCPACK(unsigned char**,int*);
void AdjROUTERS(unsigned char** ,int*);
void AdjSUBNETMASK(unsigned char**,int*);
void AdjCLASSIDENTIFIER(unsigned char** ,int*);
void AdjSERVERIDENTIFIER(unsigned char** ,int*);
void AdjLEASETIME(unsigned char** ,int*);
void AdjBOOTSIZE(unsigned char** ,int*);
SOCKET TomaSocketUser();
struct tm * TomaHora();
int split_parametros(char **,char *, char *);
void duerme(unsigned int );
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