/******************************************************************************
-Author: Samuel Jero <sj323707@ohio.edu>
+Utility to ping hosts using DCCP Request packets to test for DCCP connectivity.
+
+Copyright (C) 2012 Samuel Jero <sj323707@ohio.edu>
+
+This program 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.
-Date: 10/2012
+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 for more details.
-Description: Program to ping hosts using DCCP REQ packets to test for DCCP connectivity.
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Author: Samuel Jero <sj323707@ohio.edu>
+Date: 11/2012
******************************************************************************/
#include <stdarg.h>
#include <stdlib.h>
#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 <fcntl.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"
+
+#define DEFAULT_SERVICE_CODE 1885957735
+#define DEFAULT_PORT 33434
+
+
+#define DCCPPING_VERSION 1.1
+#define MAX(x,y) (x>y ? x : y)
extern int errno;
+#ifndef NI_IDN
+#define NI_IDN 32
+#endif
+#ifndef SOL_DCCP
+#define SOL_DCCP 269
+#endif
+
+/*Structure for simpler IPv4/IPv6 Address handling*/
typedef union ipaddr{
struct sockaddr *gen;
struct sockaddr_in *ipv4;
struct sockaddr_in6 *ipv6;
} ipaddr_ptr_t;
+/*Possible Responses*/
+enum response_type{
+ UNKNOWN=0,
+ DCCP_RESET,
+ DCCP_RESPONSE,
+ DCCP_SYNC,
+ ICMPv4,
+ ICMPv6,
+};
-int debug=0; /*set to 1 to turn on debugging information*/
-int count=-1; /*Default number of pings (-1 is infinity)*/
-int dest_port=33434; /*Default port*/
-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;
+/*Output strings corresponding to Possible Errors*/
+static const char* response_good[] = {
+ "Unknown",
+ "Closed Port (Reset)",
+ "Open Port (Response)",
+ "Open Port (Sync)",
+ "ICMPv4",
+ "ICMPv6"
+};
+
+static const char* response_dccp_reset[] = {
+ "Unspecified",
+ "Closed",
+ "Aborted",
+ "No Connection",
+ "Packet Error",
+ "Option Error",
+ "Mandatory Error",
+ "Connection Refused",
+ "Bad Service Code",
+ "Too Busy",
+ "Bad Init Cookie",
+ "Aggression Penalty"
+};
+
+static const char* response_icmpv4_dest_unreach[] = {
+ "Destination Network Unreachable",
+ "Destination Host Unreachable",
+ "Destination Protocol Unreachable",
+ "Destination Port Unreachable",
+ "Fragmentation Required",
+ "Source Routing Failed",
+ "Destination Network Unknown",
+ "Destination Host Unknown",
+ "Source Host Isolated",
+ "Network Administratively Prohibited",
+ "Host Administratively Prohibited",
+ "Network Unreachable for Type of Service",
+ "Host Unreachable for Type of Service",
+ "Communication Administratively Prohibited",
+ "Host Precedence Violation",
+ "Presedence Cutoff in Effect"
+};
+
+static const char* response_icmpv4_ttl[] = {
+ "TTL Expired",
+ "Fragment Reassembly Failed"
+};
+
+static const char* response_icmpv6_dest_unreach[] = {
+ "No Route to Destination",
+ "Communication Administratively Prohibited",
+ "Beyond Scope of Source Address",
+ "Address Unreachable",
+ "Port Unreachable",
+ "Source Failed Ingress/Eggress Policy",
+ "Rejected Source Route",
+ "Error in Source Routing"
+};
+
+static const char* response_icmpv6_packet_too_big = "Packet Too Big";
+
+static const char* response_icmpv6_ttl[] = {
+ "TTL Expired",
+ "Fragment Reassembly Failed"
+};
+
+static const char* response_icmpv6_param_prob[]={
+ "Erroneous Header Field",
+ "Unrecognized Next Header (DCCP not supported)",
+ "Unrecognized IPv6 Option"
+};
+
+
+
+
+/*Structure to keep track of information about a request*/
+struct request{
+ int request_seq;
+ int packet_seq;
+ int num_replies;
+ int num_errors;
+ struct timeval sent;
+ struct timeval reply;
+ enum response_type reply_type;
+ struct request *next;
+ struct request *prev;
+};
+
+/*Request Queue head structure*/
+struct request_queue{
+ struct request *head;
+ struct request *tail;
+};
+
+/*Statistics about the requests and replies sent*/
+struct stats{
+ int requests_sent;
+ int replies_received;
+ int duplicates;
+ int errors;
+ long long rtt_min;
+ long long rtt_sum;
+ long long rtt_sum2;
+ long rtt_max;
+ struct timeval start;
+ struct timeval stop;
+};
+
+struct params{
+ int count; /*Number of pings (-1 is infinity)*/
+ int no_resolve; /*1 if we shouldn't resolve IP addresses*/
+ int dest_port; /*Destination port*/
+ int src_port; /*Source port---used to encode pid*/
+ int ttl; /*TTL*/
+ long interval; /*Delay between pings in ms*/
+ int ip_type; /*IPv4 or IPv6*/
+ ipaddr_ptr_t dest_addr; /*Destination Address*/
+ ipaddr_ptr_t src_addr; /*Source Address*/
+ int dccp_socket; /*DCCP Socket used to grab src addr/port*/
+ char* hostname; /*Originally requested hostname*/
+ unsigned int service_code;/*DCCP Service Code*/
+};
+
+
+int debug=0; /*set to 1 to turn on debugging information*/
+struct request_queue queue; /*Queue of requests to track RTT/duplicate information*/
+struct stats ping_stats; /*Ping Statistics*/
+struct params parms; /*Parameters for ping*/
+char addr2str_buf[1000]; /*Buffer for printing addresses*/
+char addr2nm_buf[1000]; /*Buffer for printing addresses*/
+char addr2both_buf[1000]; /*Buffer for printing addresses*/
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 req_seq, int packet_seq);
+int logResponse(ipaddr_ptr_t *src, int seq, int type, int v1, int v2);
+const char *get_error_string(int type, int v1, int v2);
+void clearQueue();
+void sigHandler();
+void printStats();
+char* addr2str(ipaddr_ptr_t *res, int nores);
void usage();
-
+void version();
+void sanitize_environment();
+void dbgprintf(int level, const char *fmt, ...);
+static long llsqrt(long long a);
/*Parse commandline options*/
int main(int argc, char *argv[])
char c;
char *src=NULL;
char *dst=NULL;
+ char *tmp;
+ /*Set Defaults*/
+ queue.head=NULL;
+ queue.tail=NULL;
+ ping_stats.replies_received=0;
+ ping_stats.requests_sent=0;
+ ping_stats.rtt_sum=0;
+ ping_stats.rtt_sum2=0;
+ ping_stats.duplicates=0;
+ ping_stats.rtt_max=0;
+ ping_stats.rtt_min=0;
+ ping_stats.errors=0;
+ parms.count=-1;
+ parms.dest_port=DEFAULT_PORT;
+ parms.ttl=64;
+ parms. interval=1000;
+ parms.ip_type=AF_UNSPEC;
+ parms.dest_addr.gen=NULL;
+ parms.src_addr.gen=NULL;
+ parms.dccp_socket=-1;
+ parms.no_resolve=0;
+ parms.hostname=NULL;
+ parms.service_code=DEFAULT_SERVICE_CODE;
sanitize_environment();
- while ((c = getopt(argc, argv, "64c:p:i:dt:S:")) != -1) {
+ while ((c = getopt(argc, argv, "64vVhnc:p:i:t:S:s:")) != -1) {
switch (c) {
case '6':
- ip_type=AF_INET6;
+ parms.ip_type=AF_INET6;
break;
case '4':
- ip_type=AF_INET;
+ parms.ip_type=AF_INET;
break;
case 'c':
- count = atoi(optarg);
- if(count<=0){
+ parms.count = atoi(optarg);
+ if(parms.count<=0){
dbgprintf(0, "Error: count must be positive");
exit(1);
}
break;
case 'p':
- dest_port = atoi(optarg);
+ parms.dest_port = atoi(optarg);
break;
case 'i':
- interval = (long)(atof(optarg) * 1000.0);
- if (interval <= 0) {
- fprintf(stderr, "Invalid interval\n");
+ parms.interval = (long)(atof(optarg) * 1000.0);
+ if (parms.interval <= 0) {
+ dbgprintf(0, "Error: Invalid interval\n");
exit(1);
}
break;
- case 'd':
+ case 'v':
debug++;
break;
+ case 'n':
+ parms.no_resolve=1;
+ break;
case 't':
- ttl = atoi(optarg);
- if (ttl < 1 || ttl > 255) {
- fprintf(stderr, "Invalid TTL\n");
+ parms.ttl = atoi(optarg);
+ if (parms.ttl < 1 || parms.ttl > 255) {
+ dbgprintf(0,"Error: Invalid TTL\n");
+ exit(1);
+ }
+ break;
+ case 's':
+ parms.service_code=strtol(optarg,&tmp,0);
+ if(*tmp!='\0'){
+ dbgprintf(0,"Error: Invalid Service Code\n");
+ exit(1);
+ }
+ if(parms.service_code<=0){
+ dbgprintf(0, "Error: Service Code MUST be positive");
+ exit(1);
}
break;
case 'S':
src=optarg;
- //r = inet_aton(optarg, &src_ip);
break;
+ case 'V':
+ version();
+ break;
+ case 'h':
+ /*Intentional Fall-through*/
default:
usage();
break;
usage();
}
dst=argv[0];
+ parms.hostname=argv[0];
getAddresses(src, dst);
+ if(parms.src_addr.gen==NULL || parms.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);
+ free(parms.src_addr.gen);
+ free(parms.dest_addr.gen);
+ close(parms.dccp_socket);
+ clearQueue();
return 0;
}
struct addrinfo hint;
struct addrinfo *dtmp, *stmp;
struct ifaddrs *temp, *cur;
- struct sockaddr_in6* iv6;
+ ipaddr_ptr_t ipv;
+ struct sockaddr_in6* iv61;
+ struct sockaddr_in6* iv62;
+ struct sockaddr_in* iv41;
+ struct sockaddr_in* iv42;
int addrlen;
int err;
+ int opt;
/*Lookup destination Address*/
memset(&hint,0,sizeof(struct addrinfo));
- hint.ai_family=ip_type;
+ hint.ai_family=parms.ip_type;
hint.ai_flags=AI_V4MAPPED | AI_ADDRCONFIG;
if((err=getaddrinfo(dst,NULL,&hint,&dtmp))!=0){
exit(1);
}else{
addrlen=dtmp->ai_addrlen;
- hint.ai_family=ip_type=dtmp->ai_family;
- dest_addr.gen=malloc(dtmp->ai_addrlen);
- if(dest_addr.gen==NULL){
+ hint.ai_family=parms.ip_type=dtmp->ai_family;
+ parms.dest_addr.gen=malloc(dtmp->ai_addrlen);
+ if(parms.dest_addr.gen==NULL){
dbgprintf(0,"Error: Can't allocate Memory\n");
exit(1);
}
- memcpy(dest_addr.gen,dtmp->ai_addr,dtmp->ai_addrlen);
+ memcpy(parms.dest_addr.gen,dtmp->ai_addr,dtmp->ai_addrlen);
+ parms.dest_addr.gen->sa_family=dtmp->ai_family;
}
freeaddrinfo(dtmp);
/*Get a meaningful source address*/
if(src!=NULL){
/*Use Commandline arg*/
+
+ /*Convert arg to address*/
if((err=getaddrinfo(src,NULL,&hint,&stmp))!=0){
dbgprintf(0,"Error: Source Address %s is invalid (%s)\n", src, gai_strerror(err));
exit(1);
if(stmp==NULL){
dbgprintf(0,"Error: Unknown Host %s\n", dst);
exit(1);
- }else{
- addrlen=stmp->ai_addrlen;
- src_addr.gen=malloc(stmp->ai_addrlen);
- if(src_addr.gen==NULL){
- dbgprintf(0,"Error: Can't allocate Memory\n");
- exit(1);
- }
- memcpy(src_addr.gen,stmp->ai_addr,stmp->ai_addrlen);
}
- freeaddrinfo(stmp);
- }else{
- /*Guess a good source address*/
+
+ /*Compare to interface addresses*/
getifaddrs(&temp);
cur=temp;
while(cur!=NULL){
- if(cur->ifa_addr==NULL || cur->ifa_addr->sa_family!=ip_type){ /*Not matching ipv4/ipv6 of dest*/
- cur=cur->ifa_next;
- continue;
- }
- if(cur->ifa_flags & IFF_LOOPBACK){ /*Don't use loopback addresses*/
+ if(cur->ifa_addr==NULL || cur->ifa_addr->sa_family!=stmp->ai_family){
+ /*Not matching ipv4/ipv6 of dest*/
cur=cur->ifa_next;
continue;
}
- if(cur->ifa_addr!=NULL && cur->ifa_addr->sa_family==AF_INET6){
- iv6=(struct sockaddr_in6*)cur->ifa_addr;
-
- if(iv6->sin6_scope_id!=0){ /*Not globally valid address, if ipv6*/
- cur=cur->ifa_next;
- continue;
+ if(stmp->ai_family==AF_INET){
+ iv41=(struct sockaddr_in*)stmp->ai_addr;
+ iv42=(struct sockaddr_in*)cur->ifa_addr;
+ if(memcmp(&iv41->sin_addr,&iv42->sin_addr, sizeof(iv41->sin_addr))==0){
+ parms.src_addr.gen=malloc(sizeof(struct sockaddr_storage));
+ if(parms.src_addr.gen==NULL){
+ dbgprintf(0,"Error: Can't allocate Memory\n");
+ exit(1);
+ }
+ parms.src_addr.gen->sa_family=parms.ip_type;
+ memcpy(parms.src_addr.gen,cur->ifa_addr,addrlen);
+ break;
+ }
+ }else{
+ iv61=(struct sockaddr_in6*)stmp->ai_addr;
+ iv62=(struct sockaddr_in6*)cur->ifa_addr;
+ if(memcmp(&iv61->sin6_addr,&iv62->sin6_addr, sizeof(iv61->sin6_addr))==0){
+ parms.src_addr.gen=malloc(sizeof(struct sockaddr_storage));
+ if(parms.src_addr.gen==NULL){
+ dbgprintf(0,"Error: Can't allocate Memory\n");
+ exit(1);
+ }
+ parms.src_addr.gen->sa_family=parms.ip_type;
+ memcpy(parms.src_addr.gen,cur->ifa_addr,addrlen);
+ break;
}
}
-
- src_addr.gen=malloc(sizeof(struct sockaddr_storage));
- if(src_addr.gen==NULL){
- dbgprintf(0,"Error: Can't allocate Memory\n");
- exit(1);
- }
- src_addr.gen->sa_family=ip_type;
- memcpy(src_addr.gen,cur->ifa_addr,addrlen);
- //break;
cur=cur->ifa_next;
}
+ if(parms.src_addr.gen==NULL){
+ ipv.gen=(struct sockaddr*)stmp->ai_addr;
+ dbgprintf(0,"Error: Source Address %s does not belong to any interface!\n",addr2str(&ipv,1));
+ exit(1);
+ }
freeifaddrs(temp);
+ freeaddrinfo(stmp);
+ }
+
+ /*Create socket to auto respond for open connections and reserve a source port*/
+ parms.dccp_socket=socket(parms.ip_type,SOCK_DCCP, IPPROTO_DCCP);
+ if(parms.dccp_socket<0){
+ dbgprintf(0, "Error: Failed opening DCCP Socket (%s)\n",strerror(errno));
+ exit(1);
+ }
+ fcntl(parms.dccp_socket, F_SETFL, O_NONBLOCK);
+
+
+ if(parms.src_addr.gen==NULL){
+ /*Auto-detect source address*/
+ parms.src_addr.gen=malloc(sizeof(struct sockaddr_storage));
+ if(parms.src_addr.gen==NULL){
+ dbgprintf(0,"Error: Can't allocate Memory\n");
+ exit(1);
+ }
+ memset(parms.src_addr.gen,0,sizeof(struct sockaddr_storage));
+ parms.src_addr.gen->sa_family=parms.ip_type;
+ }else{
+ /*Bind to the given source address*/
+ if(bind(parms.dccp_socket,parms.src_addr.gen,sizeof(struct sockaddr_storage))<0){
+ dbgprintf(0, "Error: Failed bind() on DCCP socket (%s)\n",strerror(errno));
+ exit(1);
+ }
+ }
+ opt=htonl(parms.service_code);
+ if(setsockopt(parms.dccp_socket,SOL_DCCP, DCCP_SOCKOPT_SERVICE,&opt,sizeof(opt))<0){
+ dbgprintf(0, "Error: Failed setsockopt() on DCCP socket (%s)\n",strerror(errno));
+ exit(1);
+ }
+
+ /*Connect socket to get source address/port*/
+ if(parms.ip_type==AF_INET){
+ parms.dest_addr.ipv4->sin_port=htons(parms.dest_port);
+ }else{
+ parms.dest_addr.ipv6->sin6_port=htons(parms.dest_port);
+ }
+ if(connect(parms.dccp_socket,parms.dest_addr.gen,sizeof(struct sockaddr_storage))<0){
+ if(errno!=EINPROGRESS){
+ dbgprintf(0, "Error: Failed connect() on DCCP socket (%s)\n",strerror(errno));
+ exit(1);
+ }
+ }
+
+ /*Get source address and port number!*/
+ addrlen=sizeof(struct sockaddr_storage);
+ if(getsockname(parms.dccp_socket,parms.src_addr.gen,(socklen_t*)&addrlen)<0){
+ dbgprintf(0, "Error: Failed getsockname() on DCCP socket (%s)\n",strerror(errno));
+ exit(1);
+ }
+ if(parms.ip_type==AF_INET){
+ parms.src_port=ntohs(parms.src_addr.ipv4->sin_port);
+ parms.dest_addr.ipv4->sin_port=0;
+ }else{
+ parms.src_port=ntohs(parms.src_addr.ipv6->sin6_port);
+ parms.dest_addr.ipv6->sin6_port=0;
}
return;
}
/*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];
- 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");
+ fd_set sel;
+ struct timeval timeout;
+ struct timeval t,delay, add;
+ int request_seq=1;
+ int packet_seq;
/*Open Sockets*/
- rs=socket(ip_type, SOCK_RAW | SOCK_NONBLOCK ,IPPROTO_RAW);
+ rs=socket(parms.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(parms.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(parms.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(parms.ip_type,SOCK_RAW,IPPROTO_ICMPV6);
+ if(is6<0){
+ dbgprintf(0,"Error opening raw ICMPv6 socket\n");
exit(1);
- }*/
+ }
- buildPacket(sbuffer,&slen);
- if(ip_type==AF_INET){
+
+ /*Build DCCP packet*/
+ packet_seq=rand();
+ buildRequestPacket(sbuffer,&slen,packet_seq);
+ if(parms.ip_type==AF_INET){
addrlen=sizeof(struct sockaddr_in);
}else{
addrlen=sizeof(struct sockaddr_in6);
}
- while(!done){
+ /*Start Message*/
+ printf("PINGING %s (%s) on DCCP port %i\n",parms.hostname, addr2str(&parms.dest_addr,1),parms.dest_port);
- if(sendto(rs, &sbuffer, slen, MSG_DONTWAIT,(struct sockaddr*)dest_addr.gen,addrlen)<0){
- dbgprintf(0,"Error: sendto failed\n");
+ while(!done){
+ /*Send Ping*/
+ if(sendto(rs, &sbuffer, slen, MSG_DONTWAIT,(struct sockaddr*)parms.dest_addr.gen,addrlen)<0){
+ if(errno!=EINTR){
+ dbgprintf(0,"Error: sendto() failed (%s)\n",strerror(errno));
+ }
}
+ if(parms.count==0){done=1; break;}
- 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));
- }else{
- dbgprintf(0, "Sending DCCP Request to %s\n",inet_ntop(ip_type, (void*)&dest_addr.ipv6->sin6_addr, pbuf, 1000));
+ if (logPacket(request_seq,packet_seq)<0){
+ dbgprintf(0,"Error: Couldn't record request!\n");
}
+ dbgprintf(2, "Sending DCCP Request to %s\n", addr2str(&parms.dest_addr,1));
- 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));
+ /*Use select to wait on packets or until interval has passed*/
+ add.tv_sec=parms.interval/1000;
+ add.tv_usec=(parms.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));
+ }
}
- }
- if(rlen>0){
- if(rlen< sizeof(struct dccp_hdr)){
- dbgprintf(0,"Received Non-DCCP data!\n");
+ if(parms.count==0){done=1;break;}
+
+ if(FD_ISSET(ds,&sel)){
+ /*Data on the DCCP socket*/
+ handleDCCPpacket(ds,rs);
+
}
- 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(FD_ISSET(is4,&sel) && parms.ip_type==AF_INET){
+ /*Data on the ICMPv4 socket*/
+ handleICMP4packet(is4);
+ }
+ if(FD_ISSET(is6,&sel) && parms.ip_type==AF_INET6){
+ /*Data on the ICMPv6 socket*/
+ handleICMP6packet(is6);
+ }
+ gettimeofday(&t,NULL);
}
- 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));
- }
+ /*Update count*/
+ if(parms.count>-1){
+ parms.count--;
}
- if(rlen>0){
- dbgprintf(0,"Received ICMP data!\n");
+ request_seq++;
+ packet_seq=rand();
+ updateRequestPacket(sbuffer,&slen, packet_seq);
+ }
+
+ printStats();
+
+ close(rs);
+ close(is4);
+ close(is6);
+ close(ds);
+}
+
+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, 1500,0,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(count>-1){
- count--;
+ if(rcv_addr.gen->sa_family!=parms.ip_type){ //confirm IP type
+ dbgprintf(2, "DCCP packet on %s. Tossing.\n", (parms.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,&parms.dest_addr.ipv4->sin_addr,
+ sizeof(parms.dest_addr.ipv4->sin_addr))!=0){ //not from destination
+ dbgprintf(2,"DCCP packet from 3rd host\n");
+ free(rcv_addr.gen);
+ return;
}
- if(count==0){
- done=1;
- break;
+ if(rlen < sizeof(struct dccp_hdr)+sizeof(struct iphdr)){ //check packet size
+
+ dbgprintf(2, "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, &parms.dest_addr.ipv6->sin6_addr,
+ sizeof(parms.dest_addr.ipv6->sin6_addr))!=0){ //not from destination
+ dbgprintf(2,"DCCP packet from 3rd host\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(rlen < sizeof(struct dccp_hdr)){ //check packet size
+
+ dbgprintf(2, "Packet smaller than possible DCCP packet received on DCCP socket\n");
+ free(rcv_addr.gen);
+ return;
}
- sleep(interval/1000);
+ ptr=rbuffer;
}
- close(rs);
- close(is);
- close(ds);
+ /*DCCP checks*/
+ dhdr=(struct dccp_hdr*)ptr;
+ if(dhdr->dccph_sport!=htons(parms.dest_port)){
+ dbgprintf(2,"DCCP packet with wrong Source Port (%i)\n", ntohs(dhdr->dccph_sport));
+ free(rcv_addr.gen);
+ return;
+ }
+ if(dhdr->dccph_dport!=htons(parms.src_port)){
+ dbgprintf(2,"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(2, "Tossing DCCP Reset packet that's small!\n");
+ return;
+ }
+ dhdr_re=(struct dccp_hdr_reset*)(ptr+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext));
+
+ /*Log*/
+ if(dhdr_re->dccph_reset_code==DCCP_RESET_CODE_NO_CONNECTION){
+ logResponse(&rcv_addr, ntohl(dhdr_re->dccph_reset_ack.dccph_ack_nr_low), DCCP_RESET,dhdr_re->dccph_reset_code,0);
+ }
+ /*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(2, "Tossing DCCP Response packet that's too small!\n");
+ return;
+ }
+
+ /*Log*/
+ 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),DCCP_RESPONSE,0,0);
+
+ /*DCCP socket opened in getAddresses() will send Reset*/
+ }
+ 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(2, "Tossing DCCP Sync/SyncAck packet that's too small!\n");
+ return;
+ }
+
+ /*Log*/
+ 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),DCCP_SYNC,0,0);
+
+ /*DCCP socket opened in getAddresses() will 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;
+ 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*/
+ if((rlen=recvfrom(rcv_socket, &rbuffer, 1500,0,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;
+ }
+
+ iph=(struct iphdr*)rbuffer;
+
+
+ if(rlen < sizeof(struct icmphdr)+sizeof(struct iphdr)){ //check packet size
+ dbgprintf(2, "Packet smaller than possible ICMPv4 packet!\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ icmp4=(struct icmphdr*)(rbuffer+iph->ihl*4);
+ if(icmp4->type!=ICMP_DEST_UNREACH && icmp4->type!=ICMP_TIME_EXCEEDED){ //check icmp types
+ dbgprintf(2, "Tossing ICMPv4 packet of type %i\n", icmp4->type);
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Check packet size again*/
+ if(rlen<sizeof(struct icmphdr)+2*sizeof(struct iphdr)+4){
+ dbgprintf(2, "Tossing ICMPv4 packet that's too small to contain DCCP header!\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Decode IPv4 header*/
+ ip4hdr=(struct iphdr*)(rbuffer+iph->ihl*4+sizeof(struct icmphdr));
+ if(memcmp(&parms.src_addr.ipv4->sin_addr,&ip4hdr->saddr,sizeof(parms.src_addr.ipv4->sin_addr))!=0){
+ /*Source address doesn't match*/
+ dbgprintf(2,"Tossing ICMPv4 packet because the embedded IPv4 source address isn't us\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(memcmp(&parms.dest_addr.ipv4->sin_addr,&ip4hdr->daddr,sizeof(parms.dest_addr.ipv4->sin_addr))!=0){
+ /*Destination address doesn't match*/
+ dbgprintf(2,"Tossing ICMPv4 packet because the embedded IPv4 destination address isn't our target\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(ip4hdr->protocol!=IPPROTO_DCCP){
+ /*Not DCCP!*/
+ dbgprintf(2,"Tossing ICMPv4 packet because the embedded packet isn't DCCP\n");
+ free(rcv_addr.gen);
+ return;
+ }
+
+ /*Decode DCCP header*/
+ dhdr=(struct dccp_hdr*)(rbuffer+iph->ihl*4+sizeof(struct icmphdr)+ip4hdr->ihl*4);
+ if(dhdr->dccph_dport!=htons(parms.dest_port)){
+ /*DCCP Destination Ports don't match*/
+ dbgprintf(2,"Tossing ICMPv4 packet because the embedded packet doesn't have our DCCP destination port\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(dhdr->dccph_sport!=htons(parms.src_port)){
+ /*DCCP Source Ports don't match*/
+ dbgprintf(2,"Tossing ICMPv4 packet because the embedded packet doesn't have our DCCP source port\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ dhdre=(struct dccp_hdr_ext*)(rbuffer+iph->ihl*4+sizeof(struct icmphdr)+ip4hdr->ihl*4+sizeof(struct dccp_hdr));
+
+ /*Log*/
+ if(rlen<sizeof(struct icmphdr)+2*sizeof(struct iphdr)+sizeof(struct dccp_hdr)+sizeof(struct dccp_hdr_ext)){
+ logResponse(&rcv_addr,-1,ICMPv4,icmp4->type,icmp4->code);
+ }else{
+ logResponse(&rcv_addr,ntohl(dhdre->dccph_seq_low),ICMPv4,icmp4->type,icmp4->code);
+ }
+ free(rcv_addr.gen);
+ return;
}
-void buildPacket(unsigned char* buffer, int *len){
+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;
+
+ /*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, 1500,0,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(2, "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(2, "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(2, "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(&parms.src_addr.ipv6->sin6_addr,&ip6hdr->ip6_src,sizeof(parms.src_addr.ipv6->sin6_addr))!=0){
+ dbgprintf(2,"Tossing ICMPv6 packet because the embedded IPv6 source address isn't us\n");
+ /*Source address doesn't match*/
+ free(rcv_addr.gen);
+ return;
+ }
+ if(memcmp(&parms.dest_addr.ipv6->sin6_addr,&ip6hdr->ip6_dst,sizeof(parms.dest_addr.ipv6->sin6_addr))!=0){
+ /*Destination address doesn't match*/
+ dbgprintf(2,"Tossing ICMPv6 packet because the embedded IPv6 destination address isn't our target\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_nxt!=IPPROTO_DCCP){
+ /*Not DCCP!*/
+ dbgprintf(2,"Tossing ICMPv6 packet because the embedded packet isn't DCCP\n");
+ 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(parms.dest_port)){
+ /*DCCP Destination Ports don't match*/
+ dbgprintf(2,"Tossing ICMPv6 packet because the embedded packet doesn't have our DCCP destination port\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ if(dhdr->dccph_sport!=htons(parms.src_port)){
+ /*DCCP Source Ports don't match*/
+ dbgprintf(2,"Tossing ICMPv6 packet because the embedded packet doesn't have our DCCP source port\n");
+ free(rcv_addr.gen);
+ return;
+ }
+ dhdre=(struct dccp_hdr_ext*)(rbuffer+sizeof(struct icmp6_hdr)+sizeof(struct ip6_hdr)+sizeof(struct dccp_hdr));
+
+ /*Log*/
+ logResponse(&rcv_addr,ntohl(dhdre->dccph_seq_low), ICMPv6, icmp6->icmp6_type,icmp6->icmp6_code);
+ 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);
/*IP header*/
ip4hdr=NULL;
- if(ip_type==AF_INET){
+ if(parms.ip_type==AF_INET){
ip_hdr_len=sizeof(struct iphdr);
ip4hdr=(struct iphdr*)buffer;
ip4hdr->check=htons(0);
- memcpy(&ip4hdr->daddr, &dest_addr.ipv4->sin_addr, sizeof(dest_addr.ipv4->sin_addr));
+ memcpy(&ip4hdr->daddr, &parms.dest_addr.ipv4->sin_addr, sizeof(parms.dest_addr.ipv4->sin_addr));
ip4hdr->frag_off=htons(0);
ip4hdr->id=htons(1);//first
ip4hdr->ihl=5;
ip4hdr->protocol=IPPROTO_DCCP;
- memcpy(&ip4hdr->saddr, &src_addr.ipv4->sin_addr, sizeof(src_addr.ipv4->sin_addr));
+ memcpy(&ip4hdr->saddr, &parms.src_addr.ipv4->sin_addr, sizeof(parms.src_addr.ipv4->sin_addr));
ip4hdr->tos=0;
ip4hdr->tot_len=htons(ip_hdr_len+dccp_hdr_len);
- ip4hdr->ttl=ttl;
+ ip4hdr->ttl=parms.ttl;
ip4hdr->version=4;
}else{
ip_hdr_len=sizeof(struct ip6_hdr);
ip6hdr=(struct ip6_hdr*)buffer;
- memcpy(&ip6hdr->ip6_dst, &dest_addr.ipv6->sin6_addr, sizeof(dest_addr.ipv6->sin6_addr));
- memcpy(&ip6hdr->ip6_src, &src_addr.ipv6->sin6_addr, sizeof(src_addr.ipv6->sin6_addr));
+ memcpy(&ip6hdr->ip6_dst, &parms.dest_addr.ipv6->sin6_addr, sizeof(parms.dest_addr.ipv6->sin6_addr));
+ memcpy(&ip6hdr->ip6_src, &parms.src_addr.ipv6->sin6_addr, sizeof(parms.src_addr.ipv6->sin6_addr));
ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_flow=htonl(6<<28); //version, traffic class, flow label
- ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_hlim=ttl;
+ ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_hlim=parms.ttl;
ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_nxt=IPPROTO_DCCP;
ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_plen=htons(dccp_hdr_len);
}
dhdr->dccph_checksum=0;
dhdr->dccph_cscov=0;
dhdr->dccph_doff=dccp_hdr_len/4;
- dhdr->dccph_dport=htons(dest_port);
+ dhdr->dccph_dport=htons(parms.dest_port);
dhdr->dccph_reserved=0;
- dhdr->dccph_sport=htons(dest_port);
+ dhdr->dccph_sport=htons(parms.src_port);
dhdr->dccph_x=1;
dhdr->dccph_type=DCCP_PKT_REQUEST;
dhdr->dccph_seq2=htonl(0); //Reserved if using 48 bit sequence numbers
dhdr->dccph_seq=htonl(0); //High 16bits of sequence number. Always make 0 for simplicity.
dhdre->dccph_seq_low=htonl(seq);
- dhdrr->dccph_req_service= htonl(0x50455246);
+ dhdrr->dccph_req_service=htonl(parms.service_code);
+
+ /*Checksums*/
+ if(parms.ip_type==AF_INET){
+ dhdr->dccph_checksum=ipv4_pseudohdr_chksum((buffer+ip_hdr_len), dccp_hdr_len,
+ (unsigned char*) &parms.dest_addr.ipv4->sin_addr,
+ (unsigned char*)&parms.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*) &parms.dest_addr.ipv6->sin6_addr,
+ (unsigned char*)&parms.src_addr.ipv6->sin6_addr, IPPROTO_DCCP);
+ }
+ *len=ip_hdr_len+dccp_hdr_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(parms.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){
+ if(parms.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);
+ (unsigned char*) &parms.dest_addr.ipv4->sin_addr,
+ (unsigned char*)&parms.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);
+ (unsigned char*) &parms.dest_addr.ipv6->sin6_addr,
+ (unsigned char*)&parms.src_addr.ipv6->sin6_addr, IPPROTO_DCCP);
}
*len=ip_hdr_len+dccp_hdr_len;
return;
}
+int logPacket(int req_seq, int packet_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->packet_seq=packet_seq;
+ tmp->request_seq=req_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, int v1, int v2){
+ struct request *cur;
+ long long diff;
+
+ if(queue.tail==NULL){
+ dbgprintf(2,"Response received but no requests sent!\n");
+ return -1;
+ }
+
+ /*Locate request*/
+ cur=queue.tail;
+ while(cur!=NULL){
+ if(cur->packet_seq==seq){
+ gettimeofday(&cur->reply,NULL);
+ if((type==DCCP_RESET && v1==3) || type==DCCP_RESPONSE || type==DCCP_SYNC){
+ cur->num_replies++;
+ }else{
+ cur->num_errors++;
+ }
+ cur->reply_type=type;
+ break;
+ }
+ cur=cur->prev;
+ }
+
+ if(cur==NULL){
+ if(parms.ip_type==AF_INET && seq==-1){
+ /*IPv4 didn't include enough of the packet to get sequence numbers!*/
+ printf("%s from %s\n",get_error_string(type,v1,v2),addr2str(src,0));
+ ping_stats.errors++;
+ return 0;
+ }else{
+ dbgprintf(2,"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);
+
+ /*Print Message*/
+ if((type==DCCP_RESET && v1==3) || type==DCCP_RESPONSE || type==DCCP_SYNC){
+ if(debug==0){
+ printf( "Response from %s : seq=%i time=%.1fms\n",addr2str(src,0),cur->request_seq, diff/1000.0);
+ }else{
+ printf( "Response from %s : seq=%i time=%.1fms status=%s\n",
+ addr2str(src,0),cur->request_seq, diff/1000.0,response_good[type]);
+ }
+ }else{
+
+ printf("%s from %s : seq=%i\n",get_error_string(type,v1,v2),addr2str(src,0),cur->request_seq);
+ }
+
+ /*Update statistics*/
+ if((type==DCCP_RESET && v1==3) || type==DCCP_RESPONSE || type==DCCP_SYNC){
+ /*Good Response*/
+ if(cur->num_replies==1){
+ ping_stats.rtt_sum+=diff;
+ ping_stats.rtt_sum2+=(diff*diff);
+ ping_stats.replies_received++;
+ }else{
+ printf("Duplicate packet detected! (%i)\n",cur->request_seq);
+ ping_stats.duplicates++;
+ }
+ 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;
+}
+
+const char *get_error_string(int type, int v1, int v2){
+ const char *label=NULL;
+ switch(type){
+ case DCCP_RESET:
+ if(v1>11){label=NULL;break;}
+ label=response_dccp_reset[v1];
+ break;
+ case ICMPv4:
+ switch(v1){
+ case 3:
+ if(v2>15){label=NULL;break;}
+ label=response_icmpv4_dest_unreach[v2];
+ break;
+ case 11:
+ if(v2>1){label=NULL;break;}
+ label=response_icmpv4_ttl[v2];
+ break;
+ default:
+ label=NULL;
+ break;
+ }
+ break;
+ case ICMPv6:
+ switch(v1){
+ case 1:
+ if(v2>7){label=NULL;break;}
+ label=response_icmpv6_dest_unreach[v2];
+ break;
+ case 2:
+ if(v2>0){label=NULL;break;}
+ label=response_icmpv6_packet_too_big;
+ break;
+ case 3:
+ if(v2>1){label=NULL;break;}
+ label=response_icmpv6_ttl[v2];
+ break;
+ case 4:
+ if(v2>2){label=NULL;break;}
+ label=response_icmpv6_param_prob[v2];
+ break;
+ default:
+ label=NULL;
+ break;
+ }
+ break;
+ }
+ return label;
+}
+
+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(){
+ /*Exit Quickly*/
+ parms.count=0;
+}
+
+void printStats(){
+ int diff;
+ double ploss, rtt_avg, rtt_avg2, rtt_mdev;
+
+ /*Compute Stats*/
+ if(ping_stats.replies_received>0){
+ rtt_avg=ping_stats.rtt_sum/(ping_stats.replies_received*1.0);
+ rtt_avg2=ping_stats.rtt_sum2/(ping_stats.replies_received*1.0);
+ rtt_mdev=llsqrt(rtt_avg2 - (rtt_avg*rtt_avg));
+ }else{
+ rtt_avg=0;
+ rtt_avg2=0;
+ rtt_mdev=0;
+ }
+ 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;
+
+ /*Print Stats*/
+ gettimeofday(&ping_stats.stop,NULL);
+ printf("-----------%s PING STATISTICS-----------\n",parms.hostname);
+ ploss=(1.0*(ping_stats.requests_sent-ping_stats.replies_received)/ping_stats.requests_sent*1.0)*100;
+ printf("%i packets transmitted, %i received, ",ping_stats.requests_sent,ping_stats.replies_received);
+ if(ping_stats.duplicates>0){
+ printf("%i duplicates, ",ping_stats.duplicates);
+ }
+ if(ping_stats.errors>0){
+ printf("%i errors, ",ping_stats.errors);
+ }
+ printf("%.2f%% loss, time %ims\n",ploss,diff);
+ if(ping_stats.replies_received>ping_stats.requests_sent){
+ printf("+Somebody is creating packets out of thing air!\n");
+ }
+ printf("rtt min/avg/max/mdev = %.1f/%.1f/%.1f/%.1f ms\n",
+ ping_stats.rtt_min/1000.0,rtt_avg/1000.0,ping_stats.rtt_max/1000.0,rtt_mdev/1000.0);
+
+}
+
+char* addr2str(ipaddr_ptr_t *res, int nores){
+ int size;
+ int ret;
+ if (!res->gen->sa_family)
+ return NULL;
+
+ if(res->gen->sa_family==AF_INET){
+ size=sizeof(struct sockaddr_in);
+ }else if(res->gen->sa_family==AF_INET6){
+ size=sizeof(struct sockaddr_in6);
+ }else{
+ return NULL;
+ }
+ if((ret=getnameinfo(res->gen, size,
+ addr2str_buf, sizeof (addr2str_buf), 0, 0, NI_NUMERICHOST))<0){
+ dbgprintf(0,"Error: getnameinfo() returned %s\n",gai_strerror(ret));
+ }
+
+ if (parms.no_resolve||nores){
+ return addr2str_buf;
+ }else{
+ addr2nm_buf[0] = '\0';
+ getnameinfo(res->gen, size,
+ addr2nm_buf, sizeof (addr2nm_buf), 0, 0, NI_IDN);
+ snprintf(addr2both_buf,1000," %s (%s)", addr2nm_buf[0] ? addr2nm_buf : addr2str_buf, addr2str_buf);
+ return addr2both_buf;
+ }
+ return NULL;
+}
+
/*Usage information for program*/
void usage()
{
- dbgprintf(0, "dccpping: [-d] [-6|-4] [-c count] [-p port] [-i interval] [-t ttl] [-S srcaddress] remote_host\n");
+ dbgprintf(0, "dccpping: [-v] [-V] [-h] [-n] [-6|-4] [-c count] [-p port] [-i interval]\n");
+ dbgprintf(0, " [-t ttl] [-s service_code] [-S srcaddress] remote_host\n");
+ dbgprintf(0, "\n");
+ dbgprintf(0, " -v Verbose. May be repeated for aditional verbosity.\n");
+ dbgprintf(0, " -V Version information\n");
+ dbgprintf(0, " -h Help\n");
+ dbgprintf(0, " -n Numeric output only\n");
+ dbgprintf(0, " -6 Force IPv6 mode\n");
+ dbgprintf(0, " -4 Force IPv4 mode\n");
+ exit(0);
+}
+
+void version(){
+ dbgprintf(0, "dccpping version %.1f\nCopyright (C) 2012 Samuel Jero <sj323707@ohio.edu>\n", DCCPPING_VERSION);
+ dbgprintf(0, "This program comes with ABSOLUTELY NO WARRANTY.\n");
+ dbgprintf(0, "This is free software, and you are welcome to\nredistribute it under certain conditions.\n");
exit(0);
}
va_end(args);
}
}
+
+/*Square Root function for longs*/
+/*Borrowed from iputils/ping_common.c*/
+/* http://www.skbuff.net/iputils/ */
+static long llsqrt(long long a)
+{
+ long long prev = ~((long long)1 << 63);
+ long long x = a;
+
+ if (x > 0) {
+ while (x < prev) {
+ prev = x;
+ x = (x+(a/x))/2;
+ }
+ }
+
+ return (long)x;
+}
projects / dccpping / blobdiff