#include <stdio.h>
#include <string.h>
#include <strings.h>
-#include <sys/types.h>
#include <unistd.h>
-#include <time.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
-#include <linux/dccp.h>
+#include <sys/select.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/in.h>
-#include <netdb.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/icmp6.h>
#include <arpa/inet.h>
-#include <ifaddrs.h>
+#include <netdb.h>
#include <net/if.h>
-#include <errno.h>
+#include <ifaddrs.h>
+#include <linux/dccp.h>
#include "checksums.h"
-extern int errno;
+#define MAX(x,y) (x>y ? x : y)
+/*Structure for simpler IPv4/IPv6 Address handling*/
typedef union ipaddr{
struct sockaddr *gen;
struct sockaddr_in *ipv4;
struct sockaddr_in6 *ipv6;
} ipaddr_ptr_t;
+enum responses{
+ UNKNOWN=0,
+ RESET,
+ RESPONSE,
+ SYNC,
+ DEST_UNREACHABLE,
+ TTL_EXPIRATION,
+ TOO_BIG,
+ PARAMETER_PROBLEM
+};
+char* response_label[]= {
+"Unknown",
+"Closed Port (Reset)",
+"Open Port (Response)",
+"Open Port (Sync)",
+"Destination Unreachable",
+"TTL Expiration",
+"Packet Too Big",
+"DCCP Not Supported (Parameter Problem)"
+};
+
+
+struct request{
+ int seq;
+ int num_replies;
+ int num_errors;
+ struct timeval sent;
+ struct timeval reply;
+ enum responses reply_type;
+ struct request *next;
+ struct request *prev;
+};
+
+struct stats{
+ int requests_sent;
+ int replies_received;
+ int errors;
+ double rtt_min;
+ double rtt_avg;
+ double rtt_max;
+ struct timeval start;
+ struct timeval stop;
+};
+
+struct request_queue{
+ struct request *head;
+ struct request *tail;
+};
+
int debug=0; /*set to 1 to turn on debugging information*/
int count=-1; /*Default number of pings (-1 is infinity)*/
int ttl=64; /*Default TTL*/
long interval=1000; /*Default delay between pings in ms*/
int ip_type=AF_UNSPEC; /*IPv4 or IPv6*/
-ipaddr_ptr_t dest_addr;
-ipaddr_ptr_t src_addr;
+ipaddr_ptr_t dest_addr; /*Destination Address*/
+ipaddr_ptr_t src_addr; /*Source Address*/
+struct request_queue queue;
+struct stats ping_stats;
+extern int errno;
void getAddresses(char *src, char* dst);
void doping();
-void buildPacket(unsigned char* buffer, int *len);
-void dbgprintf(int level, const char *fmt, ...);
-void sanitize_environment();
+void handleDCCPpacket(int rcv_socket, int send_socket);
+void handleICMP4packet(int rcv_socket);
+void handleICMP6packet(int rcv_socket);
+void buildRequestPacket(unsigned char* buffer, int *len, int seq);
+void updateRequestPacket(unsigned char* buffer, int *len, int seq);
+int logPacket(int seq);
+int logResponse(ipaddr_ptr_t *src, int seq, int type);
+void clearQueue();
+void sigHandler();
void usage();
+void sanitize_environment();
+void dbgprintf(int level, const char *fmt, ...);
/*Parse commandline options*/
char c;
char *src=NULL;
char *dst=NULL;
-
+ queue.head=NULL;
+ queue.tail=NULL;
+ ping_stats.replies_received=0;
+ ping_stats.requests_sent=0;
+ ping_stats.rtt_avg=0;
+ ping_stats.rtt_max=0;
+ ping_stats.rtt_min=0;
+ ping_stats.errors=0;
sanitize_environment();
break;
case 'S':
src=optarg;
- //r = inet_aton(optarg, &src_ip);
break;
default:
usage();
dst=argv[0];
getAddresses(src, dst);
+ if(src_addr.gen==NULL || dest_addr.gen==NULL){
+ dbgprintf(0,"Error: Can't determine source or destination address\n");
+ exit(1);
+ }
+ signal(SIGINT, sigHandler);
doping();
free(src_addr.gen);
free(dest_addr.gen);
+ clearQueue();
return 0;
}
/*Preform the ping functionality*/
void doping(){
- int rs, is,ds;
+ int rs, is4,is6,ds;
int done=0;
int addrlen;
int slen=1500;
unsigned char sbuffer[slen];
- unsigned char rbuffer[1000];
+ fd_set sel;
+ struct timeval timeout;
+ struct timeval t,delay, add;
char pbuf[1000];
- struct dccp_hdr *dhdr;
- struct sockaddr_storage rcv_addr;
- socklen_t rcv_addr_len=sizeof(struct sockaddr_storage);
- struct sockaddr_in6 *tmp;
- //int opt;
- int rlen;
-
- dbgprintf(0, "In doping()\n");
+ int seq=1;
/*Open Sockets*/
- rs=socket(ip_type, SOCK_RAW | SOCK_NONBLOCK ,IPPROTO_RAW);
+ rs=socket(ip_type, SOCK_RAW ,IPPROTO_RAW);
if(rs<0){
dbgprintf(0, "Error opening raw socket\n");
exit(1);
}
- ds=socket(ip_type, SOCK_RAW | SOCK_NONBLOCK ,IPPROTO_DCCP);
+ ds=socket(ip_type, SOCK_RAW ,IPPROTO_DCCP);
if(ds<0){
dbgprintf(0, "Error opening raw DCCP socket\n");
exit(1);
}
- is=socket(ip_type,SOCK_RAW | SOCK_NONBLOCK ,IPPROTO_ICMP);
- if(is<0){
- dbgprintf(0,"Error opening raw ICMP socket\n");
+ is4=socket(ip_type,SOCK_RAW,IPPROTO_ICMP);
+ if(is4<0){
+ dbgprintf(0,"Error opening raw ICMPv4 socket\n");
exit(1);
}
-
- /*opt=((unsigned char*)&dhdr->dccph_checksum) - &sbuffer[0];
- if (setsockopt(ds, IPPROTO_IPV6, IPV6_CHECKSUM, &opt, sizeof(opt)) < 0){
- dbgprintf(0, "Error setting up checksums on raw DCCP socket (%s)\n", strerror(errno));
+ is6=socket(ip_type,SOCK_RAW,IPPROTO_ICMPV6);
+ if(is6<0){
+ dbgprintf(0,"Error opening raw ICMPv6 socket\n");
exit(1);
- }*/
+ }
- buildPacket(sbuffer,&slen);
+
+ /*Build DCCP packet*/
+ buildRequestPacket(sbuffer,&slen,seq);
if(ip_type==AF_INET){
addrlen=sizeof(struct sockaddr_in);
}else{
addrlen=sizeof(struct sockaddr_in6);
}
- while(!done){
+ /*Start Message*/
+ if(ip_type==AF_INET){
+ dbgprintf(0, "PINGING %s on DCCP port %i\n",
+ inet_ntop(ip_type, (void*)&dest_addr.ipv4->sin_addr, pbuf, 1000),dest_port);
+ }else{
+ dbgprintf(0, "PINGING %s on DCCP port %i\n",
+ inet_ntop(ip_type, (void*)&dest_addr.ipv6->sin6_addr, pbuf, 1000),dest_port);
+ }
+ while(!done){
+ /*Send Ping*/
if(sendto(rs, &sbuffer, slen, MSG_DONTWAIT,(struct sockaddr*)dest_addr.gen,addrlen)<0){
- dbgprintf(0,"Error: sendto failed\n");
+ if(errno!=EINTR){
+ dbgprintf(0,"Error: sendto failed\n");
+ }
}
+ if(count==0){done=1; break;}
+ if (logPacket(seq)<0){
+ dbgprintf(0,"Error: Couldn't record request!\n");
+ }
if(ip_type==AF_INET){
- dbgprintf(0, "Sending DCCP Request to %s\n",inet_ntop(ip_type, (void*)&dest_addr.ipv4->sin_addr, pbuf, 1000));
+ dbgprintf(1, "Sending DCCP Request to %s\n",inet_ntop(ip_type, (void*)&dest_addr.ipv4->sin_addr, pbuf, 1000));
}else{
- dbgprintf(0, "Sending DCCP Request to %s\n",inet_ntop(ip_type, (void*)&dest_addr.ipv6->sin6_addr, pbuf, 1000));
+ dbgprintf(1, "Sending DCCP Request to %s\n",inet_ntop(ip_type, (void*)&dest_addr.ipv6->sin6_addr, pbuf, 1000));
}
- rcv_addr_len=sizeof(struct sockaddr_storage);
- if((rlen=recvfrom(ds, &rbuffer, 1000,MSG_DONTWAIT,(struct sockaddr*)&rcv_addr,&rcv_addr_len))<0){
- if(errno!=EAGAIN){
- dbgprintf(0, "Error on receive from DCCP socket (%s)\n",strerror(errno));
- }
- }
- if(rlen>0){
- if(rlen< sizeof(struct dccp_hdr)){
- dbgprintf(0,"Received Non-DCCP data!\n");
+ /*Use select to wait on packets or until interval has passed*/
+ add.tv_sec=interval/1000;
+ add.tv_usec=(interval%1000)*1000;
+ gettimeofday(&t,NULL);
+ timeradd(&t,&add,&delay);
+ while(timercmp(&t,&delay,<)){
+ /*Prepare for select*/
+ FD_ZERO(&sel);
+ FD_SET(ds,&sel);
+ FD_SET(is4,&sel);
+ FD_SET(is6,&sel);
+ timersub(&delay,&t,&timeout);
+
+ /*Do select call*/
+ if(select(MAX(ds+1,MAX(is4+1,is6+1)),&sel, NULL,NULL,&timeout)<0){
+ if(errno!=EINTR){
+ dbgprintf(0,"Select() error (%s)\n",strerror(errno));
+ }
}
- dhdr=(struct dccp_hdr*)rbuffer;
- tmp=(struct sockaddr_in6*)&rcv_addr;
- dbgprintf(0,"Response from %s (%i)\n", inet_ntop(ip_type, (void*)&tmp->sin6_addr, pbuf, 1000),dhdr->dccph_type);
- }
+ if(count==0){done=1;break;}
+
+ if(FD_ISSET(ds,&sel)){
+ /*Data on the DCCP socket*/
+ handleDCCPpacket(ds,rs);
- if((rlen=recvfrom(is, &rbuffer, 1000,MSG_DONTWAIT,(struct sockaddr*)&rcv_addr,&rcv_addr_len))<0){
- if(errno!=EAGAIN){
- dbgprintf(0, "Error on receive from ICMP socket (%s)\n",strerror(errno));
}
- }
- if(rlen>0){
- dbgprintf(0,"Received ICMP data!\n");
+ if(FD_ISSET(is4,&sel) && ip_type==AF_INET){
+ /*Data on the ICMPv4 socket*/
+ handleICMP4packet(is4);
+ }
+ if(FD_ISSET(is6,&sel) && ip_type==AF_INET6){
+ /*Data on the ICMPv6 socket*/
+ handleICMP6packet(is6);
+ }
+ gettimeofday(&t,NULL);
}
+ /*Update count*/
if(count>-1){
count--;
}
- if(count==0){
- done=1;
- break;
- }
- sleep(interval/1000);
+ seq++;
+ updateRequestPacket(sbuffer,&slen, seq);
}
close(rs);
- close(is);
+ close(is4);
+ close(is6);
close(ds);
}
-void buildPacket(unsigned char* buffer, int *len){
+void handleDCCPpacket(int rcv_socket, int send_socket){
+ int rlen=1500;
+ unsigned char rbuffer[rlen];
+ ipaddr_ptr_t rcv_addr;
+ socklen_t rcv_addr_len;
+ struct dccp_hdr *dhdr;
+ struct dccp_hdr_reset *dhdr_re;
+ struct dccp_hdr_response *dhdr_rp;
+ struct dccp_hdr_ack_bits *dhdr_sync;
+ unsigned char* ptr;
+ struct iphdr* iph;
+
+ /*Memory for socket address*/
+ rcv_addr_len=sizeof(struct sockaddr_storage);
+ rcv_addr.gen=malloc(rcv_addr_len);
+ if(rcv_addr.gen==NULL){
+ dbgprintf(0,"Error: Can't Allocate Memory!\n");
+ exit(1);
+ }
+
+ /*Receive Packet*/
+ rcv_addr_len=sizeof(struct sockaddr_storage);
+ if((rlen=recvfrom(rcv_socket, &rbuffer, 1000,0,rcv_addr.gen,&rcv_addr_len))<0){
+ if(errno!=EINTR){
+ dbgprintf(0, "Error on receive from DCCP socket (%s)\n",strerror(errno));
+ }
+ }
+ if(rlen<0){
+ return;
+ }
+
+ if(rcv_addr.gen->sa_family!=ip_type){ //confirm IP type
+ dbgprintf(1, "DCCP packet on %s. Tossing.\n", (ip_type==AF_INET) ? "IPv4" : "IPv6");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ if(rcv_addr.gen->sa_family==AF_INET){
+ /*IPv4*/
+ if(memcmp(&rcv_addr.ipv4->sin_addr,&dest_addr.ipv4->sin_addr,
+ sizeof(dest_addr.ipv4->sin_addr))!=0){ //not from destination
+ dbgprintf(1,"DCCP packet from 3rd host\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(rlen < sizeof(struct dccp_hdr)+sizeof(struct iphdr)){ //check packet size
+
+ dbgprintf(1, "Packet smaller than possible DCCP packet received on DCCP socket\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ iph=(struct iphdr*)rbuffer;
+ ptr=rbuffer+iph->ihl*4;
+ }else{
+ /*IPv6*/
+ if(memcmp(&rcv_addr.ipv6->sin6_addr, &dest_addr.ipv6->sin6_addr,
+ sizeof(dest_addr.ipv6->sin6_addr))!=0){ //not from destination
+ dbgprintf(1,"DCCP packet from 3rd host\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(rlen < sizeof(struct dccp_hdr)){ //check packet size
+
+ dbgprintf(1, "Packet smaller than possible DCCP packet received on DCCP socket\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ ptr=rbuffer;
+ }
+
+ /*DCCP checks*/
+ dhdr=(struct dccp_hdr*)ptr;
+ if(dhdr->dccph_sport!=htons(dest_port)){
+ dbgprintf(1,"DCCP packet with wrong Source Port (%i)\n", ntohs(dhdr->dccph_sport));
+ free(rcv_addr.gen);
+ return;
+ }
+ if(dhdr->dccph_dport!=htons(dest_port)){
+ dbgprintf(1,"DCCP packet with wrong Destination Port\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Pick Response*/
+ if(dhdr->dccph_type==DCCP_PKT_RESET){
+ if(rlen < (ptr-rbuffer)+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)+sizeof(struct dccp_hdr_reset)){
+ dbgprintf(1, "Error: Reset packet too small!");
+ return;
+ }
+ dhdr_re=(struct dccp_hdr_reset*)(ptr+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext));
+ logResponse(&rcv_addr, ntohl(dhdr_re->dccph_reset_ack.dccph_ack_nr_low), RESET);
+ /*Nothing else to do*/
+ }
+ if(dhdr->dccph_type==DCCP_PKT_RESPONSE){
+ if(rlen < (ptr-rbuffer)+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)+sizeof(struct dccp_hdr_response)){
+ dbgprintf(1, "Error: Response packet too small!");
+ return;
+ }
+ dhdr_rp=(struct dccp_hdr_response*)(ptr+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext));
+ logResponse(&rcv_addr,ntohl(dhdr_rp->dccph_resp_ack.dccph_ack_nr_low),RESPONSE);
+ /*TODO:Send Close back*/
+ }
+ if(dhdr->dccph_type==DCCP_PKT_SYNC || dhdr->dccph_type==DCCP_PKT_SYNCACK){
+ if(rlen < (ptr-rbuffer)+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)+sizeof(struct dccp_hdr_ack_bits)){
+ dbgprintf(1, "Error: Response packet too small!");
+ return;
+ }
+ dhdr_sync=(struct dccp_hdr_ack_bits*)(ptr+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext));
+ logResponse(&rcv_addr,ntohl(dhdr_sync->dccph_ack_nr_low),SYNC);
+ /*TODO:Send Reset*/
+ }
+
+ free(rcv_addr.gen);
+}
+
+void handleICMP4packet(int rcv_socket){
+ int rlen=1500;
+ unsigned char rbuffer[rlen];
+ ipaddr_ptr_t rcv_addr;
+ socklen_t rcv_addr_len;
+ struct icmphdr *icmp4;
+ struct dccp_hdr *dhdr;
+ struct dccp_hdr_ext *dhdre;
+ struct iphdr* ip4hdr;
+ int type;
+
+ /*Memory for socket address*/
+ rcv_addr_len=sizeof(struct sockaddr_storage);
+ rcv_addr.gen=malloc(rcv_addr_len);
+ if(rcv_addr.gen==NULL){
+ dbgprintf(0,"Error: Can't Allocate Memory!\n");
+ exit(1);
+ }
+
+ /*Receive Packet*/
+ if((rlen=recvfrom(rcv_socket, &rbuffer, 1000,0,rcv_addr.gen,&rcv_addr_len))<0){
+ if(errno!=EINTR){
+ dbgprintf(0, "Error on receive from ICMPv4 socket (%s)\n",strerror(errno));
+ }
+ }
+ if(rlen<0){
+ return;
+ }
+
+ if(rlen < sizeof(struct icmphdr)){ //check packet size
+ dbgprintf(1, "Packet smaller than possible ICMPv4 packet!\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ icmp4=(struct icmphdr*)rbuffer;
+ if(icmp4->type!=ICMP_DEST_UNREACH && icmp4->type!=ICMP_TIME_EXCEEDED){ //check icmp types
+ dbgprintf(1, "Tossing ICMPv4 packet of type %i\n", icmp4->type);
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Check packet size again*/
+ if(rlen<sizeof(struct icmphdr)+sizeof(struct iphdr)+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)){
+ dbgprintf(1, "Tossing ICMPv4 packet that's too small to contain DCCP header!\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Decode IPv4 header*/
+ ip4hdr=(struct iphdr*)(rbuffer+sizeof(struct icmphdr));
+ if(memcmp(&src_addr.ipv4->sin_addr,&ip4hdr->saddr,sizeof(src_addr.ipv4->sin_addr))!=0){
+ /*Source address doesn't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ if(memcmp(&dest_addr.ipv4->sin_addr,&ip4hdr->daddr,sizeof(dest_addr.ipv4->sin_addr))!=0){
+ /*Destination address doesn't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ if(ip4hdr->protocol!=IPPROTO_DCCP){
+ /*Not DCCP!*/
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Decode DCCP header*/
+ dhdr=(struct dccp_hdr*)(rbuffer+sizeof(struct icmphdr)+ip4hdr->ihl*4);
+ if(dhdr->dccph_dport!=htons(dest_port)){
+ /*DCCP Destination Ports don't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ if(dhdr->dccph_sport!=htons(dest_port)){
+ /*DCCP Source Ports don't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ dhdre=(struct dccp_hdr_ext*)(rbuffer+sizeof(struct icmphdr)+ip4hdr->ihl*4+sizeof(struct dccp_hdr));
+
+ /*Log*/
+ if(icmp4->type==ICMP_DEST_UNREACH){
+ type=DEST_UNREACHABLE;
+ }
+ if(icmp4->type==ICMP_TIME_EXCEEDED){
+ type=TTL_EXPIRATION;
+ }
+ logResponse(&rcv_addr,ntohl(dhdre->dccph_seq_low),type);
+ free(rcv_addr.gen);
+ return;
+}
+
+void handleICMP6packet(int rcv_socket){
+ int rlen=1500;
+ unsigned char rbuffer[rlen];
+ ipaddr_ptr_t rcv_addr;
+ socklen_t rcv_addr_len;
+ struct icmp6_hdr *icmp6;
+ struct ip6_hdr* ip6hdr;
+ struct dccp_hdr *dhdr;
+ struct dccp_hdr_ext *dhdre;
+ int type;
+
+ /*Memory for socket address*/
+ rcv_addr_len=sizeof(struct sockaddr_storage);
+ rcv_addr.gen=malloc(rcv_addr_len);
+ if(rcv_addr.gen==NULL){
+ dbgprintf(0,"Error: Can't Allocate Memory!\n");
+ exit(1);
+ }
+
+ /*Receive Packet*/
+ if((rlen=recvfrom(rcv_socket, &rbuffer, 1000,0,rcv_addr.gen,&rcv_addr_len))<0){
+ dbgprintf(0, "Error on receive from ICMPv6 socket (%s)\n",strerror(errno));
+ }
+
+ if(rlen < sizeof(struct icmp6_hdr)){ //check packet size
+ dbgprintf(1, "Packet smaller than possible ICMPv6 packet!\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ icmp6=(struct icmp6_hdr*)rbuffer;
+ if(icmp6->icmp6_type!=ICMP6_DST_UNREACH && icmp6->icmp6_type!=ICMP6_PACKET_TOO_BIG
+ && icmp6->icmp6_type!=ICMP6_TIME_EXCEEDED && icmp6->icmp6_type!=ICMP6_PARAM_PROB){ //check icmp types
+ dbgprintf(1, "Tossing ICMPv6 packet of type %i\n", icmp6->icmp6_type);
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Check packet size again*/
+ if(rlen<sizeof(struct icmp6_hdr)+sizeof(struct ip6_hdr)+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)){
+ dbgprintf(1, "Tossing ICMPv6 packet that's too small to contain DCCP header!\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Decode IPv6 header*/
+ ip6hdr=(struct ip6_hdr*)(rbuffer+sizeof(struct icmp6_hdr));
+ if(memcmp(&src_addr.ipv6->sin6_addr,&ip6hdr->ip6_src,sizeof(src_addr.ipv6->sin6_addr))!=0){
+ /*Source address doesn't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ if(memcmp(&dest_addr.ipv6->sin6_addr,&ip6hdr->ip6_dst,sizeof(dest_addr.ipv6->sin6_addr))!=0){
+ /*Destination address doesn't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ if(ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_nxt!=IPPROTO_DCCP){
+ /*Not DCCP!*/
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Decode DCCP header*/
+ dhdr=(struct dccp_hdr*)(rbuffer+sizeof(struct icmp6_hdr)+sizeof(struct ip6_hdr));
+ if(dhdr->dccph_dport!=htons(dest_port)){
+ /*DCCP Destination Ports don't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ if(dhdr->dccph_sport!=htons(dest_port)){
+ /*DCCP Source Ports don't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ dhdre=(struct dccp_hdr_ext*)(rbuffer+sizeof(struct icmp6_hdr)+sizeof(struct ip6_hdr)+sizeof(struct dccp_hdr));
+
+
+
+ /*Log*/
+ if(icmp6->icmp6_type==ICMP6_DST_UNREACH){
+ type=DEST_UNREACHABLE;
+ }
+ if(icmp6->icmp6_type==ICMP6_PACKET_TOO_BIG){
+ type=TOO_BIG;
+ }
+ if(icmp6->icmp6_type==ICMP6_TIME_EXCEEDED){
+ type=TTL_EXPIRATION;
+ }
+ if(icmp6->icmp6_type==ICMP6_PARAM_PROB){
+ type=PARAMETER_PROBLEM;
+ }
+ logResponse(&rcv_addr,ntohl(dhdre->dccph_seq_low),type);
+ free(rcv_addr.gen);
+ return;
+}
+
+void buildRequestPacket(unsigned char* buffer, int *len, int seq){
struct dccp_hdr *dhdr;
struct dccp_hdr_ext *dhdre;
struct dccp_hdr_request *dhdrr;
int ip_hdr_len;
int dccp_hdr_len=sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)+sizeof(struct dccp_hdr_request);
- int seq=8;
+
+ if(*len < dccp_hdr_len+sizeof(struct ip6_hdr)){
+ dbgprintf(0, "Error: Insufficient buffer space\n");
+ exit(1);
+ }
memset(buffer, 0, *len);
return;
}
+void updateRequestPacket(unsigned char* buffer, int *len, int seq){
+ struct dccp_hdr *dhdr;
+ struct dccp_hdr_ext *dhdre;
+ struct iphdr* ip4hdr;
+
+ int ip_hdr_len;
+ int dccp_hdr_len=sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)+sizeof(struct dccp_hdr_request);
+
+ /*IP header*/
+ ip4hdr=NULL;
+ if(ip_type==AF_INET){
+ ip_hdr_len=sizeof(struct iphdr);
+ ip4hdr=(struct iphdr*)buffer;
+ ip4hdr->check=htons(0);
+ ip4hdr->id=htons(seq);
+ }else{
+ ip_hdr_len=sizeof(struct ip6_hdr);
+ }
+
+ /*DCCP header*/
+ dhdr=(struct dccp_hdr*)(buffer+ip_hdr_len);
+ dhdre=(struct dccp_hdr_ext*)(buffer+ip_hdr_len+sizeof(struct dccp_hdr));
+ dhdr->dccph_checksum=0;
+ dhdre->dccph_seq_low=htonl(seq);
+
+ /*Checksums*/
+ if(ip_type==AF_INET){
+ dhdr->dccph_checksum=ipv4_pseudohdr_chksum((buffer+ip_hdr_len), dccp_hdr_len,
+ (unsigned char*) &dest_addr.ipv4->sin_addr,
+ (unsigned char*)&src_addr.ipv4->sin_addr, IPPROTO_DCCP);
+ ip4hdr->check=ipv4_chksum(buffer,ip_hdr_len);
+ }else{
+ dhdr->dccph_checksum=ipv6_pseudohdr_chksum((buffer+ip_hdr_len), dccp_hdr_len,
+ (unsigned char*) &dest_addr.ipv6->sin6_addr,
+ (unsigned char*)&src_addr.ipv6->sin6_addr, IPPROTO_DCCP);
+ }
+ *len=ip_hdr_len+dccp_hdr_len;
+ return;
+}
+
+int logPacket(int seq){
+ struct request *tmp;
+
+ /*Add new request to queue*/
+ tmp=malloc(sizeof(struct request));
+ if(tmp==NULL){
+ dbgprintf(0,"Error: Can't allocate Memory!\n");
+ exit(1);
+ }
+ tmp->next=NULL;
+ tmp->prev=NULL;
+ tmp->num_replies=0;
+ tmp->num_errors=0;
+ tmp->seq=seq;
+ tmp->reply_type=UNKNOWN;
+ gettimeofday(&tmp->sent,NULL);
+
+ if(queue.head==NULL){
+ queue.head=queue.tail=tmp;
+ }else{
+ queue.head->prev=tmp;
+ tmp->next=queue.head;
+ queue.head=tmp;
+ }
+
+ /*Update Statistics*/
+ if(ping_stats.requests_sent==0){
+ gettimeofday(&ping_stats.start,NULL);
+ }
+ ping_stats.requests_sent++;
+ return 0;
+}
+
+int logResponse(ipaddr_ptr_t *src, int seq, int type){
+ struct request *cur;
+ double diff;
+ char pbuf[1000];
+
+ if(queue.tail==NULL){
+ dbgprintf(1,"Response received but no requests sent!\n");
+ return -1;
+ }
+
+ /*Locate request*/
+ cur=queue.tail;
+ while(cur!=NULL){
+ if(cur->seq==seq){
+ gettimeofday(&cur->reply,NULL);
+ if(cur->num_replies>0){
+ dbgprintf(0,"Duplicate packet detected! (%i)\n", seq);
+ }
+ if(type<DEST_UNREACHABLE && type!=UNKNOWN){
+ cur->num_replies++;
+ }else{
+ cur->num_errors++;
+ }
+ cur->reply_type=type;
+ break;
+ }
+ cur=cur->prev;
+ }
+
+ if(cur==NULL){
+ dbgprintf(1,"Response received but no requests sent with sequence number %i!\n", seq);
+ return -1;
+ }
+
+ diff=(cur->reply.tv_usec + 1000000*cur->reply.tv_sec) - (cur->sent.tv_usec + 1000000*cur->sent.tv_sec);
+ diff=diff/1000.0;
+
+ /*Print Message*/
+ if(type<DEST_UNREACHABLE && type!=UNKNOWN){
+ if(ip_type==AF_INET){
+ dbgprintf(0, "Response from %s : seq=%i time=%.1fms status=%s\n",
+ inet_ntop(ip_type, (void*)&src->ipv4->sin_addr, pbuf, 1000),
+ seq, diff,response_label[type]);
+ }else{
+ dbgprintf(0, "Response from %s : seq=%i time=%.1fms status=%s\n",
+ inet_ntop(ip_type, (void*)&src->ipv6->sin6_addr, pbuf, 1000),
+ seq, diff,response_label[type]);
+ }
+ }else{
+ if(ip_type==AF_INET){
+ dbgprintf(0, "%s from %s : seq=%i\n",response_label[type],
+ inet_ntop(ip_type, (void*)&src->ipv4->sin_addr, pbuf, 1000),
+ seq);
+ }else{
+ dbgprintf(0, "%s from %s : seq=%i\n",response_label[type],
+ inet_ntop(ip_type, (void*)&src->ipv6->sin6_addr, pbuf, 1000),
+ seq);
+ }
+ }
+
+ /*Update statistics*/
+ if(type<DEST_UNREACHABLE && type!=UNKNOWN){
+ /*Good Response*/
+ if(cur->num_replies==1){
+ ping_stats.rtt_avg=((ping_stats.replies_received*ping_stats.rtt_avg)+(diff))/(ping_stats.replies_received+1);
+ ping_stats.replies_received++;
+ }else{
+ ping_stats.errors++;
+ }
+ if(diff < ping_stats.rtt_min || ping_stats.rtt_min==0){
+ ping_stats.rtt_min=diff;
+ }
+ if(diff > ping_stats.rtt_max){
+ ping_stats.rtt_max=diff;
+ }
+ }else{
+ /*Error*/
+ ping_stats.errors++;
+ }
+ gettimeofday(&ping_stats.stop,NULL);
+ return 0;
+}
+
+void clearQueue(){
+ struct request *cur;
+ struct request *tmp;
+
+ cur=queue.head;
+ while(cur!=NULL){
+ tmp=cur;
+ cur=cur->next;
+ free(tmp);
+ }
+ queue.head=NULL;
+ queue.tail=NULL;
+ return;
+}
+
+void sigHandler(){
+ char pbuf[1000];
+ int diff;
+ double ploss;
+
+ /*Print Stats*/
+ if(ip_type==AF_INET){
+ dbgprintf(0,"-----------%s PING STATISTICS-----------\n",
+ inet_ntop(ip_type, (void*)&dest_addr.ipv4->sin_addr, pbuf, 1000));
+ }else if(ip_type==AF_INET6){
+ dbgprintf(0,"-----------%s PING STATISTICS-----------\n",
+ inet_ntop(ip_type, (void*)&dest_addr.ipv6->sin6_addr, pbuf, 1000));
+ }
+ diff=(ping_stats.stop.tv_usec + 1000000*ping_stats.stop.tv_sec) -
+ (ping_stats.start.tv_usec + 1000000*ping_stats.start.tv_sec);
+ diff=diff/1000.0;
+ ploss=(1.0*(ping_stats.requests_sent-ping_stats.replies_received)/ping_stats.requests_sent*1.0)*100;
+ dbgprintf(0,"%i packets transmitted, %i received, %i errors, %.2f%% loss, time %ims\n",
+ ping_stats.requests_sent,ping_stats.replies_received,ping_stats.errors,
+ ploss,diff);
+ dbgprintf(0,"rtt min/avg/max = %.1f/%.1f/%.1f ms\n",
+ ping_stats.rtt_min,ping_stats.rtt_avg,ping_stats.rtt_max);
+
+
+ /*Exit Quickly*/
+ count=0;
+}
+
/*Usage information for program*/
void usage()
{
projects / dccpping / blobdiff