X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Fhdw-sniff.git;a=blobdiff_plain;f=hdw-sniff.c;h=db285a2e75b7c53c3b40138088eef7a00b95efde;hp=2757d6a02b775d5fd36bd5100cbc0a17b7dcfbfc;hb=f0775823587944872372259c853aee47601c82e8;hpb=65006c10b34ca9dee50c9cfb0acba1229e1f2296 diff --git a/hdw-sniff.c b/hdw-sniff.c index 2757d6a..db285a2 100644 --- a/hdw-sniff.c +++ b/hdw-sniff.c @@ -5,13 +5,217 @@ */ #include +#include +#include +#include +#include +#include +#include #include +#include +#include +#include + +/* IEEE 802.3 stuff -- i will concentrate on .11 stuff before! */ +#include /* for ethhdr struct */ +#include /* ip */ +#include /* in_addr , inet_ntoa */ + +/* IEEE 802.11 stuff -- will become one include later ... */ +#include "ieee80211.h" /* from hunz's aeolus, short hostap_wlan.h */ +#include "ieee802_11.h" /* from pcmcia-cs */ + #include "hdw-sniff.h" /* my functions */ int main(int argc, char *argv[]) { - - int count; + char pcap_error[PCAP_ERRBUF_SIZE]; + pcap_t *pcap_handle; + int pcap_fd; + fd_set pcap_fd_set; + struct timeval fd_set_tv; + char sys_call[30]; + FILE *logfile; + struct info_struct my_info_struct; + /* parse the arguments */ - for(i=1;i \n", + argv[0]); + return 0; + } + if(argc!=4) { + printf("no logfile specified, writing to stdout ...\n"); + } + else { + if((logfile=fopen(argv[3],"w"))!=NULL) { + printf("writing to logfile %s ...\n",argv[3]); + } + else { + printf("can't open logfile!\n"); + } + } + /* setting up device and set monitor mode */ + if(atoi(argv[2])==1) { + printf("setting to monitor mode\n"); + if(strncmp(argv[1],"wlan",4)==0) + sprintf(sys_call,"iwpriv %s monitor 3",argv[1]); + if(strncmp(argv[1],"eth",3)==0) + sprintf(sys_call,"ifconfig %s promisc",argv[1]); + system(sys_call); + } + printf("setting up interface\n"); + sprintf(sys_call,"ifconfig %s up",argv[1]); + system(sys_call); + + /* start pcap session */ + pcap_handle=pcap_open_live(argv[1],BUFSIZ,1,-1,pcap_error); + if(pcap_handle==NULL) { + printf("%s: %s\n",argv[0],pcap_error); + return 1; + } + + /* set non blocking */ + if((pcap_setnonblock(pcap_handle,1,pcap_error))==-1) { + printf("%s: %s\n",argv[0],pcap_error); + return 1; + } + + /* grab a package until user breaks */ + my_info_struct.count=0; + my_info_struct.mmode=argv[2][0]; + strcpy(my_info_struct.dev,argv[1]); + + /* prepare for select */ + pcap_fd=pcap_fileno(pcap_handle); + FD_ZERO(&pcap_fd_set); + FD_SET(pcap_fd,&pcap_fd_set); + fd_set_tv.tv_sec=0; + fd_set_tv.tv_usec=500000; + + /* do loopp */ + while(1) { + if((select(pcap_fd+1,&pcap_fd_set,NULL,NULL,&fd_set_tv)) && (FD_ISSET(pcap_fd,&pcap_fd_set))) pcap_loop(pcap_handle,-1,pcap_process,(u_char *)&my_info_struct); + else if((hop_channel(&my_info_struct,pcap_fd))==-1) { + printf("channelhopping failed, aborting\n"); + return -1; + } + } + return 0; +} + + +/* pcap_process callback function */ +void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, + const u_char *package) { + + /* local variables */ + struct linux_wlan_ng_prism_hdr *prism_hdr; + struct ieee802_11_hdr *w_hdr; + struct ip *ip_hdr; + struct ethhdr *e_hdr; + struct info_struct *my_info_struct; + int i; + + my_info_struct=(struct info_struct *)info; + ++(my_info_struct->count); + + printf("\n"); + printf("---> package %d ---- %s",my_info_struct->count, + ctime((const time_t*)&(pcap_header->ts.tv_sec))); + printf("pcap header:\n"); + printf("capture_length: %d (dec.)\t",pcap_header->caplen); + printf("length(off wire): %d (dec.)\n",pcap_header->len); + + /* prism wlan ng headers */ + if((my_info_struct->mmode-0x30==1) && + (strncmp(my_info_struct->dev,"wlan",4)==0)) { + printf("prism header:\n"); + prism_hdr=(struct linux_wlan_ng_prism_hdr *)package; + printf("message code/length: %d/%d\n",ntohs(prism_hdr->msgcode), + ntohs(prism_hdr->msglen)); + printf("device: %s\n",prism_hdr->devname); + + /* ieee802.11 header */ + printf("ieee802.11 header:\n"); + package+=sizeof(struct linux_wlan_ng_prism_hdr); + w_hdr=(struct ieee802_11_hdr *)package; + + printf("debug:\n"); + for(i=0;i<16;i++) { + printf("%x -> ",1<frame_ctl) & (1<frame_ctl), + ntohs(w_hdr->duration_id)); + printf("version check ... %s\n", + ((ntohs(w_hdr->frame_ctl) & IEEE802_11_FCTL_VERS)==0x00)? + "ok":"unknown"); + // printf("type: + /* skip ieee802.11 header */ + package=package+sizeof(struct ieee802_11_hdr); + } + + /* ieee802.3 */ + /* ethernet */ + e_hdr=(struct ethhdr *)package; + /* what types ? */ + printf("type = "); + printf("%x ",ntohs(e_hdr->h_proto)); + printf("dest_addr = "); + for(i=0;ih_dest+i),((i==ETH_ALEN-1)?" ":":")); + printf(" src_addr = "); + for(i=0;ih_source+i),((i==ETH_ALEN-1)?"\n":":")); + /* IP ? */ + if(ntohs(e_hdr->h_proto)==ETH_P_IP) { + printf("ip protocol: "); + ip_hdr=(struct ip *)(package+sizeof(struct ethhdr)); + printf("version = %x ",ntohs(ip_hdr->ip_v)); + printf("header_length = %x \n",ntohs(ip_hdr->ip_hl)); + printf("service = %x ",ntohs(ip_hdr->ip_tos)); + printf("total_length(dec.) = %d \n",ntohs(ip_hdr->ip_len)); + printf("ip_addresses: source = "); + printf("%s\tdestination = %s\n",inet_ntoa(ip_hdr->ip_src), + inet_ntoa(ip_hdr->ip_dst)); + printf("ip_id = %x ",ntohs(ip_hdr->ip_id)); + printf("ip_offset = %x \n",ntohs(ip_hdr->ip_off)); + printf("time2live = %x ip_proto = %x\n",ntohs(ip_hdr->ip_ttl), + ntohs(ip_hdr->ip_p)); + printf("chksum: %x\n",ntohs(ip_hdr->ip_sum)); + } + printf("all_hex_dump:\n"); + for(i=sizeof(struct ethhdr);icaplen;i++) + printf("%x ",*(package+i)); + printf("\n"); +} + +int hop_channel(struct info_struct *info,int pcap_fd) { + struct iwreq my_iwreq; + int foo_fd; + /* oder vielleicht doch pcap_fd ? */ + if((foo_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) { + printf("unable to create socket\n"); + return -1; + } + + if (info->channel==15) info->channel=1; + + memset(&my_iwreq,0,sizeof(my_iwreq)); + strcpy(my_iwreq.ifr_name,info->dev); + printf("debug: device = %s\n",my_iwreq.ifr_name); + my_iwreq.u.freq.e=0; + my_iwreq.u.freq.m=info->channel; + // if((ioctl(foo_fd,SIOCSIWFREQ,&my_iwreq))==-1) { + if((ioctl(pcap_fd,SIOCSIWFREQ,&my_iwreq))==-1) { + printf("unable to hop channels\n"); + perror("ioctl"); + return -1; + } + printf("debug: hopped to channel %d\n",info->channel); + ++(info->channel); + return 0; +} +