X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=hdw-sniff.c;h=d2e70776557d7ecd3b45cf68f2fcbcbb5eb68284;hb=91a86e79de34bb35c6abd72f6f71990de904915c;hp=2757d6a02b775d5fd36bd5100cbc0a17b7dcfbfc;hpb=65006c10b34ca9dee50c9cfb0acba1229e1f2296;p=my-code%2Fhdw-sniff.git diff --git a/hdw-sniff.c b/hdw-sniff.c index 2757d6a..d2e7077 100644 --- a/hdw-sniff.c +++ b/hdw-sniff.c @@ -4,14 +4,378 @@ * author: hackbard@hackdaworld.dyndns.org */ +#define _GNU_SOURCE + #include +#include +#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 */ +#include /* tcp header and protocols */ + +/* 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 */ +/* global variables */ +int file_fd=0; + int main(int argc, char *argv[]) { - - int count; + char pcap_error[PCAP_ERRBUF_SIZE]; + pcap_t *pcap_handle; + int pcap_fd,foo_fd; + fd_set pcap_fd_set; + struct timeval fd_set_tv; + char sys_call[30]; + 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((file_fd=open(argv[3],O_RDWR | O_CREAT))!=0) { + printf("writing to logfile %s ...\n",argv[3]); + dprintf(file_fd,"|iv - --|id|crypted_snap - --|\n"); + } + else { + printf("can't open logfile. not logged to file!\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; + } + + /* set info struct */ + my_info_struct.count=0; + my_info_struct.mmode=argv[2][0]; + my_info_struct.ssid_list=(struct list *)malloc(sizeof(struct list)); + my_info_struct.ssid_list->next=NULL; + // strcpy(my_info_struct.ssid_list->ssid,"test"); + strcpy(my_info_struct.dev,argv[1]); + + /* prepare for select */ + pcap_fd=pcap_fileno(pcap_handle); + + /* create file descriptor */ + if((foo_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) { + printf("unable to create socket foo_fd\n"); + return -1; + } + + /* do loopp */ + while (1) { + + /* set pcap_fd */ + FD_ZERO(&pcap_fd_set); + FD_SET(pcap_fd,&pcap_fd_set); + fd_set_tv.tv_sec=0; + fd_set_tv.tv_usec=200000; + + if((select(pcap_fd+1,&pcap_fd_set,NULL,NULL,&fd_set_tv)) && (FD_ISSET(pcap_fd,&pcap_fd_set))) pcap_dispatch(pcap_handle,-1,pcap_process,(u_char *)&my_info_struct); + else if((hop_channel(&my_info_struct,foo_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 */ + char tmp_buf[20],tmp_buf1[10],tmp_buf2[32]; + unsigned char crypted_snap[12]; + struct linux_wlan_ng_prism_hdr *prism_hdr; + struct ieee802_11_hdr *w_hdr; + struct snaphdr *snap_hdr; + struct beacon_struct *beacon_hdr; + struct ethhdr *e_hdr; + struct info_struct *my_info_struct; + int i,p_o,w_o,e_o,i_o,special_o=0; + + my_info_struct=(struct info_struct *)info; + ++(my_info_struct->count); + + /* cache offsets */ + p_o=((strncmp(my_info_struct->dev,"wlan",4)==0)?sizeof(struct linux_wlan_ng_prism_hdr):0); + w_o=((strncmp(my_info_struct->dev,"wlan",4)==0)?sizeof(struct ieee802_11_hdr):0); + e_o=sizeof(struct ethhdr); + i_o=sizeof(struct iphdr); + + /* new package */ + printf("\n"); + printf("---> package %d ---- %s",my_info_struct->count, + ctime((const time_t*)&(pcap_header->ts.tv_sec))); + + /* pcap header */ + printf("pcap header: "); + printf("capture_length(dec): %d\t",pcap_header->caplen); + printf("off_wire_length(dec): %d\n",pcap_header->len); + + /* wireless stuff */ + /* prism wlan ng headers */ + if((my_info_struct->mmode-0x30==1) & + (strncmp(my_info_struct->dev,"wlan",4)==0)) { + printf("prism header: (%d bytes)\n",p_o); + prism_hdr=(struct linux_wlan_ng_prism_hdr *)package; + printf("| message code/length: %d/%d |\t",prism_hdr->msgcode, + prism_hdr->msglen); + printf("device: %s |\n",prism_hdr->devname); + /* ieee802.11 header */ + + /* we need smaller w_hdr for non distributed frames */ + if((w_hdr->frame_ctl & (1<<8)) & (w_hdr->frame_ctl & (1<<9))) { + printf("=> distributed packet !!!!11\n"); + } else w_o-=(sizeof(struct snaphdr)-sizeof(unsigned short)); + + printf("ieee802.11 header: (%d bytes)\n",w_o); + w_hdr=(struct ieee802_11_hdr *)(package+p_o); + + printf("fc: "); + for(i=0;i<16;i++) + printf("%s%d%s",(i==0?"|":""), + (((w_hdr->frame_ctl) & (1<0?1:0), + (i==15?"|\n":"|")); + printf(" | v | t | s-t |t|f|m|r|p|m|w|o|\n"); + /* frame type */ + /* management */ + if(!(w_hdr->frame_ctl & 0x0c)) { + tmp_buf1[0]='\0'; tmp_buf2[0]='\0'; + if((w_hdr->frame_ctl & IEEE802_11_STYPE_ASSOC_REQ)>0) + strcpy(tmp_buf,"association request"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_ASSOC_RESP)>0) + strcpy(tmp_buf,"association response"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_REASSOC_REQ)>0) + strcpy(tmp_buf,"reassociation request"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_REASSOC_RESP)>0) + strcpy(tmp_buf,"reassociation response"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_PROBE_REQ)>0) + strcpy(tmp_buf,"probe request"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_PROBE_RESP)>0) + strcpy(tmp_buf,"probe response"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_BEACON)==IEEE802_11_STYPE_BEACON) { + beacon_hdr=(struct beacon_struct *)(package+p_o+w_o); + beacon_hdr->ssid_s.elementid==0?strcpy(tmp_buf1,"essid = ") + :strcpy(tmp_buf1,"ibssid = "); + strncpy(tmp_buf2,beacon_hdr->ssid_s.ssid, + beacon_hdr->ssid_s.length); + tmp_buf2[beacon_hdr->ssid_s.length]='\0'; + strcpy(tmp_buf,"beacon"); + add_ssid_2_list(tmp_buf2,my_info_struct->ssid_list); + } + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_ATIM)>0) + strcpy(tmp_buf,"announcement traffic indication message"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_DISASSOC)>0) + strcpy(tmp_buf,"disassociation"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_AUTH)>0) + strcpy(tmp_buf,"authentification"); + else if((w_hdr->frame_ctl & IEEE802_11_STYPE_DEAUTH)>0) + strcpy(tmp_buf,"deauthentification"); + else strcpy(tmp_buf,"impossible situation \%) - go mail the author."); + } + else strcpy(tmp_buf,"control or data frame type"); + + printf("=> %s\n",tmp_buf); + if(strlen(tmp_buf1)>0 & strlen(tmp_buf2)>0) printf(" %s%s\n", + tmp_buf1, + tmp_buf2); + printf("duration/id: 0x%x\n",w_hdr->duration_id); + printf("version check ... %s\n", + ((w_hdr->frame_ctl & IEEE802_11_FCTL_VERS)==0x00)? + "ok":"unknown"); + } + + /* ethernet */ + if((strncmp(my_info_struct->dev,"eth",3)==0) | + ((w_hdr->frame_ctl & IEEE802_11_FTYPE_DATA)==IEEE802_11_FTYPE_DATA)) { + + if((strncmp(my_info_struct->dev,"eth",3)==0)) { + printf("ethernet: (%d bytes)\n",e_o); + e_hdr=(struct ethhdr *)(package+p_o+w_o); + special_o=sizeof(struct ethhdr); + /* 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":":")); + if((ntohs(e_hdr->h_proto)==ETH_P_IP)) + parse_ip(package+p_o+w_o+e_o); + } + else { + snap_hdr=(struct snaphdr *)(package+p_o+w_o); + if((snap_hdr->snap[0]==0xaa) & + (snap_hdr->snap[1]==0xaa) & + (snap_hdr->snap[2]==0x03) & + (snap_hdr->snap[3]==0x00) & + (snap_hdr->snap[4]==0x00) & + (snap_hdr->snap[5]==0x00)) { + printf("- no encryption!\n"); + if(snap_hdr->proto==ntohs(ETH_P_IP)) { + e_o=sizeof(struct snaphdr); + parse_ip(snap_hdr+e_o); + } + + } + else { + printf("- crypted packet!\n"); + /* print crypted snap - write into file */ + printf("snap: (iv(3) + index(1) + crypted snap(6)) "); + for(i=0;i<10;i++) { + printf("%x ",*(snap_hdr->snap+i)); + crypted_snap[i]=*(snap_hdr->snap+i); + } + /* xor with plain + crypted_snap[4]^=0xaa; + crypted_snap[5]^=0xaa; + crypted_snap[6]^=0x03; + crypted_snap[7]^=0x00; + crypted_snap[8]^=0x00; + crypted_snap[9]^=0x00; + */ + + printf("\n"); + crypted_snap[10]='\0'; + crypted_snap[11]='\n'; + + if(file_fd>0) { + printf("debug: saved to file\n"); + dprintf(file_fd,IVLINE,IVL_ARGS); + } + } + } + } + + /* dump it */ +#ifdef SHOW_HEX + printf("all dump: (hex)\n"); + for(i=p_o+w_o+special_o;icaplen;i++) + printf("%x ",*(package+i)); + printf("\n"); +#endif +#ifdef DEBUG_CHAR + printf("all dump: (char)\n"); + for(i=p_o+w_o;icaplen;i++) + printf("%c ",*(package+i)); + printf("\n"); +#endif +} + +int hop_channel(struct info_struct *info,int foo_fd) { + if((info->mmode-0x30==1) && (strncmp(info->dev,"wlan",4)==0)) { + + struct iwreq my_iwreq; + + if (info->channel>=C_MAX) info->channel=1; + + memset(&my_iwreq,0,sizeof(my_iwreq)); + strcpy(my_iwreq.ifr_name,info->dev); + my_iwreq.u.freq.e=0; + my_iwreq.u.freq.m=info->channel; + if((ioctl(foo_fd,SIOCSIWFREQ,&my_iwreq))==-1) { + printf("unable to hop channels\n"); + perror("ioctl"); + return -1; + } + ++(info->channel); + } + return 0; +} + +int parse_ip(char *ip_o) { + struct iphdr *ip_hdr; + int i; + + printf("ip protocol:\n"); + ip_hdr=(struct iphdr *)ip_o; + printf("version = %x ",ip_hdr->version); + printf("header_length = %x \n",ip_hdr->ihl); + printf("service = %x ",ip_hdr->tos); + printf("total_length(dec.) = %d \n",ip_hdr->tot_len); + printf("source_ip: "); + for(i=0;i<=3;++i) { + printf("%d%s", + (ip_hdr->saddr&(0xff<<(8*i)))>>(8*i), + (i==3?"\n":".")); + } + printf("destination_ip: "); + for(i=0;i<=3;++i) { + printf("%d%s", + (ip_hdr->daddr&(0xff<<(8*i)))>>(8*i), + (i==3?"\n":".")); + } + printf("ip_id = %x ",ntohs(ip_hdr->id)); + printf("ip_offset = %x \n",ip_hdr->frag_off); + printf("time2live = %x ip_proto = %x\n",ip_hdr->ttl,ip_hdr->protocol); + /* how to continue */ + if(ip_hdr->protocol==IPPROTO_TCP) + parse_tcp(ip_hdr+sizeof(struct iphdr)); + if(ip_hdr->protocol==IPPROTO_UDP) + printf("udp package! get's parsed in the future\n"); + // printf("chksum: %x\n",ntohs(ip_hdr->ip_sum)); +} + +int parse_tcp(char *tcp_o) { + struct tcphdr *tcp_hdr; + + printf("tcp protocol:\n"); + tcp_hdr=(struct tcphdr *)tcp_o; + printf("source port: %d - dest port: %d\n",ntohs(tcp_hdr->source), + ntohs(tcp_hdr->dest)); + printf("sequence: %d - ack sequence: %d\n",ntohs(tcp_hdr->seq), + ntohs(tcp_hdr->ack_seq)); + printf("offset to data: %d - checksumm: %d\n",ntohs(tcp_hdr->doff) + ,ntohs(tcp_hdr->check)); + return 1; +}