+++ /dev/null
-#include <headers.h>
-#include <datatypes.h>
-#include <display.h>
-#include <parser.h>
-#include <leases.h>
-#include <options.h>
-
-int parse_dhcp_options( DHCPMESSAGE *dhcpm, DHCPOPTIONS *dhcpo )
-{
- int pointer, opointer;
- int olength;
-
- pointer = 0;
-
- fprintf( stdout, "parse_dhcp_options [begin]!\n");
-
- /* Options Initialization */
- /* No message type */
- dhcpo->type = 0;
- /* No ip address, 0.0.0.0 */
- dhcpo->r_ip = 0;
- /* No mask address, 0.0.0.0 */
- dhcpo->r_mask = 0;
- /* No router, 0.0.0.0 */
- dhcpo->r_router = 0;
- /* No lease 0 */
- dhcpo->r_lease = 0;
- /* No name '\n' */
- dhcpo->hostname = NULL;
-
- while( pointer< 312 )
- {
- if(( dhcpm->options[0] != 99 ) && (dhcpm->options[1]!=130) && (dhcpm->options[2]!=83) && (dhcpm->options[3]!= 99))
- {
- fprintf( stdout, "No magic cookie! Aborting! \n" );
- return -1;
- }
- switch( dhcpm->options[pointer] ){
- case PAD:
- pointer++;
- break;
- case MESSAGETYPE:
- /* Try to figure out the kind of message and start the configuring process */
- pointer += 2;
- dhcpo->type = dhcpm->options[pointer++];
- break;
- case PREQUEST:
- /* Take note of the requested parameters */
- opointer = pointer + 2;
- olength = pointer + dhcpm->options[pointer + 1];
- while( opointer < olength )
- {
- switch( dhcpm->options[opointer] ){
- case IP:
- /* Take note of the requested ip */
- opointer += 2;
- dhcpo->r_ip += dhcpm->options[opointer++];
- dhcpo->r_ip = dhcpo->r_ip << 8;
- dhcpo->r_ip += dhcpm->options[opointer++];
- dhcpo->r_ip = dhcpo->r_ip << 8;
- dhcpo->r_ip += dhcpm->options[opointer++];
- dhcpo->r_ip = dhcpo->r_ip << 8;
- dhcpo->r_ip += dhcpm->options[opointer++];
- break;
- case MASK:
- /* Take note of the requested mask */
- opointer += 2;
- dhcpo->r_mask += dhcpm->options[opointer++];
- dhcpo->r_mask = dhcpo->r_ip << 8;
- dhcpo->r_mask += dhcpm->options[opointer++];
- dhcpo->r_mask = dhcpo->r_ip << 8;
- dhcpo->r_mask += dhcpm->options[opointer++];
- dhcpo->r_mask = dhcpo->r_ip << 8;
- dhcpo->r_mask += dhcpm->options[opointer++];
- break;
- case ROUTER:
- /* Take note of the requested router */
- opointer += 2;
- dhcpo->r_router += dhcpm->options[opointer++];
- dhcpo->r_router = dhcpo->r_ip << 8;
- dhcpo->r_router += dhcpm->options[opointer++];
- dhcpo->r_router = dhcpo->r_ip << 8;
- dhcpo->r_router += dhcpm->options[opointer++];
- dhcpo->r_router = dhcpo->r_ip << 8;
- dhcpo->r_router += dhcpm->options[opointer++];
- break;
- case LEASE:
- opointer += 2;
- dhcpo->r_lease += dhcpm->options[opointer++];
- dhcpo->r_lease = dhcpo->r_ip << 8;
- dhcpo->r_lease += dhcpm->options[opointer++];
- dhcpo->r_lease = dhcpo->r_ip << 8;
- dhcpo->r_lease += dhcpm->options[opointer++];
- dhcpo->r_lease = dhcpo->r_ip << 8;
- dhcpo->r_lease += dhcpm->options[opointer++];
- break;
- case HOSTNAME:
- opointer += 1;
- dhcpo->hostname = (char *)malloc( dhcpm->options[opointer] + 1);
- strncpy( dhcpo->hostname, &dhcpm->options[opointer+1], dhcpm->options[opointer] );
- opointer += dhcpm->options[opointer] + 1;
- default:
- /* Ignore option */
- opointer++;
- break;
- }
- }
- pointer = opointer;
- break;
- case TOFFSET:
- case TIMESERVER:
- case NS:
- case DNS:
- case LOGSERVER:
- case COOKIESERVER:
- case LPRSERVER:
- case IMPSERVER:
- case RESLOCSERVER:
- case BOOTFILESIZE:
- case MERITDUMPFILE:
- case DOMAINNAME:
- case SWAPSERVER:
- case ROOTPATH:
- case EXTENSIONPATH:
- case IPFORWARD:
- case NONLOCAL:
- case POLICYFILTER:
- case MAXIMUMDATAG:
- case DEFAULTTTL:
- case PATHMTUATO:
- case PATHMTUPTO:
- case IMTU:
- case ALLSUBLOCAL:
- case BROADCAST:
- case PMASKDISCOVERY:
- case MASKSUPPLIER:
- case PROUTERDISCOVE:
- case RSOLICIADDRESS:
- case STATICROUTE:
- case TENCAPSULATION:
- case ARPCACHE:
- case ETHENCAPSUL:
- case TCPDEFTTL:
- case TCPKAI:
- case TCPKAG:
- case NISDOMAIN:
- case NISSERVER:
- case NTPSERVER:
- case VENDORSP:
- case NBTCPIPNS:
- case NBTCPIPDDS:
- case NBTCPIPNT:
- case NBTCPIPSC:
- case XWINFONTSERVER:
- case XWINDISPLAY:
- case OVERLOAD:
- case SERVER:
- case MESSAGE:
- case MAXIMUMDHCP:
- case RENEWALTIME:
- case REBINDING:
- case VENDORCLASS:
- case NISPLUSDOMAIN:
- case NISPLUSSERVER:
- case TFTPSERVER:
- case BOOTFILE:
- case MOBILEIP:
- case SMTPSERVER:
- case POP3SERVER:
- case NNTPSERVER:
- case HTTPSERVER:
- case FINGERSERVER:
- case IRCSERVER:
- case STREETTALKSE:
- case STREETTALKDA:
- case CLIENT:
- pointer++;
- pointer += dhcpm->options[pointer];
- case END:
- /* return to the calling functions because this is over */
- fprintf( stdout, "parse_dhcp_options: END option found! [end]!\n");
- return 0;
- default:
- /* ignored */
- pointer++;
- break;
- }
- }
- fprintf( stdout, "parse_dhcp_options [end]!\n");
- return 0;
-}
-
-int process_dhcp_packet( DHCPMESSAGE *dhcpm, DHCPOPTIONS *dhcpo )
-{
- int pointer = 4;
- DHCPLEASE dhcpl;
- char *name;
-
- fprintf( stdout, "process_dhcp_packet [begin]!\n");
-
- if( (!dhcpm) || (!dhcpo) )
- return -1;
-
- name = (char *)malloc( 16 );
- switch( dhcpo->type ){
-
- case DHCPDISCOVER:
- /* We need to send a DHCPOFFER */
- if( find_lease( &dhcpl, dhcpm->xid, dhcpm->chaddr ) < 0 )
- {
- fprintf( stdout, "No free leases! \n" );
- free( name );
- return -1;
- }
- dhcpm->op = BOOTREPLY;
- dhcpm->yiaddr = dhcpl.ip;
- dhcpm->siaddr = dhcpl.siaddr;
- strcpy(dhcpm->sname, VERSION);
- dhcpm->options[pointer++] = MESSAGETYPE;
- dhcpm->options[pointer++] = 1;
- dhcpm->options[pointer++] = DHCPOFFER;
- dhcpm->options[pointer++] = ROUTER;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.router & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.router >> 8) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.router >> 16) &0xFF);
- dhcpm->options[pointer++] = (dhcpl.router >> 24);
- dhcpm->options[pointer++] = MASK;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.mask & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.mask >> 8) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.mask >> 16) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.mask >> 24);
- dhcpm->options[pointer++] = SERVER;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.siaddr & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.siaddr >> 8) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.siaddr >> 16) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.siaddr >> 24);
- dhcpm->options[pointer++] = LEASE;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.lease >> 24);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.lease & 0xFF);
- dhcpm->options[pointer++] = REBINDING;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.lease >> 24);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.lease & 0xFF) - 5;
- dhcpm->options[pointer++] = RENEWALTIME;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.lease >> 24);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.lease & 0xFF) - 5;
- dhcpm->options[pointer++] = PAD;
- dhcpm->options[pointer++] = PAD;
- dhcpm->options[pointer++] = PAD;
- dhcpm->options[pointer++] = END;
- for( ; pointer < 312; pointer++ )
- dhcpm->options[pointer] = PAD;
- dhcpo->type = DHCPOFFER;
- strcpy( name, "255.255.255.255" );
- break;
-
- case DHCPREQUEST:
- /* We need to send an DHCPACK */
- dhcpm->op = BOOTREPLY;
- dhcpm->yiaddr = dhcpm->ciaddr;
- strcpy(dhcpm->sname, VERSION);
- if( confirm_lease( &dhcpl, dhcpm->xid ) < 0)
- {
- dhcpm->options[pointer++] = MESSAGETYPE;
- dhcpm->options[pointer++] = 1;
- dhcpm->options[pointer++] = DHCPNAK;
- dhcpm->options[pointer++] = PAD;
- dhcpm->options[pointer++] = END;
- for( ; pointer < 312; pointer++ )
- dhcpm->options[pointer] = PAD;
- sprintf( name, "%u.%u.%u.%u", (dhcpm->ciaddr &0xFF), ((dhcpm->ciaddr>>8)&0xFF), ((dhcpm->ciaddr>>16)&0xFF), ((dhcpm->ciaddr>>24)&0xFF));
- display_dhcp_packet( dhcpm, dhcpo );
- write_packet( dhcpm, name );
- free( name );
- return -1;
- }
- dhcpm->siaddr = dhcpl.siaddr;
- dhcpm->options[pointer++] = MESSAGETYPE;
- dhcpm->options[pointer++] = 1;
- dhcpm->options[pointer++] = DHCPACK;
- dhcpm->options[pointer++] = ROUTER;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.router >> 24);
- dhcpm->options[pointer++] = ((dhcpl.router >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.router >> 8) &0xFF);
- dhcpm->options[pointer++] = (dhcpl.router & 0xFF);
- dhcpm->options[pointer++] = MASK;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.mask >> 24);
- dhcpm->options[pointer++] = ((dhcpl.mask >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.mask >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.mask & 0xFF);
- dhcpm->options[pointer++] = SERVER;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = dhcpl.siaddr >> 24;
- dhcpm->options[pointer++] = ((dhcpl.siaddr >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.siaddr >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.siaddr & 0xFF);
- dhcpm->options[pointer++] = LEASE;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.lease >> 24);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.lease & 0xFF);
- dhcpm->options[pointer++] = REBINDING;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.lease >> 24);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.lease & 0xFF);
- dhcpm->options[pointer++] = RENEWALTIME;
- dhcpm->options[pointer++] = 4;
- dhcpm->options[pointer++] = (dhcpl.lease >> 24);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 16) & 0xFF);
- dhcpm->options[pointer++] = ((dhcpl.lease >> 8) & 0xFF);
- dhcpm->options[pointer++] = (dhcpl.lease & 0xFF);
- dhcpm->options[pointer++] = PAD;
- dhcpm->options[pointer++] = PAD;
- dhcpm->options[pointer++] = PAD;
- dhcpm->options[pointer++] = END;
- for( ; pointer < 312; pointer++ )
- dhcpm->options[pointer] = PAD;
- dhcpo->type = DHCPACK;
- sprintf( name, "%u.%u.%u.%u", (dhcpl.ip & 0xFF), ((dhcpl.ip>>8) & 0xFF), ((dhcpl.ip>>16)&0xFF), (dhcpl.ip>>24));
- break;
-
- default:
- break;
- }
- display_dhcp_packet( dhcpm, dhcpo );
- write_packet( dhcpm, name );
- fprintf( stdout, "process_dhcp_packet [end]!\n");
- free( name );
- return 0;
-}
-
-int write_packet( DHCPMESSAGE *dhcpm, char *name )
-{
- int sockfd;
- struct sockaddr_in their_addr; // connector's address information
- struct hostent *he;
- int numbytes;
- int enable = 1;
-
- fprintf( stdout, "write_packet [begin]\n" );
-
- if( !dhcpm )
- return -1;
-
- if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
- perror("socket");
- exit(1);
- }
-
- if( setsockopt( sockfd, SOL_SOCKET, SO_BROADCAST, &enable, sizeof( enable )) == -1 )
- {
- perror("setsockopt");
- exit(1);
- }
-
- if( strcmp( "255.255.255.255", name ) )
- {
- if ((he=gethostbyname(name)) == NULL) { // get the host info
- perror("gethostbyname");
- fprintf( stdout, "Unknown host %s \n", name );
- return -1;
- }
- their_addr.sin_family = AF_INET; // host byte order
- their_addr.sin_port = htons(68); // short, network byte order
- their_addr.sin_addr = *((struct in_addr *)he->h_addr);
- } else {
- their_addr.sin_family = AF_INET; // host byte order
- their_addr.sin_port = htons(68); // short, network byte order
- their_addr.sin_addr.s_addr = 0xFFFFFFFF;
- }
-
- fprintf( stdout, "IP a buscar: %s \n", name );
- memset(&(their_addr.sin_zero), '\0', 8); // zero the rest of the struct
-
- if ((numbytes=sendto(sockfd, dhcpm, sizeof(DHCPMESSAGE), 0,
- (struct sockaddr *)&their_addr, sizeof(struct sockaddr))) == -1) {
- perror("sendto");
- exit(1);
- }
-
- printf("sent %d bytes to %s\n", numbytes,
- inet_ntoa(their_addr.sin_addr));
-
- close(sockfd);
-
- fprintf( stdout, "write_packet [end]\n" );
-
- return 0;
-}
projects / reactos.git / blobdiff