X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=hdw-sniff.c;h=025973038d2fd854ce1bd1925b59538de9011913;hb=9ddf092558413b5a929e7c6068efa732f68fc24c;hp=3aa657b608972ef18066c128753e16bdea28b41e;hpb=7a55b727f19281d64c03359e79ff900d5e154d81;p=my-code%2Fhdw-sniff.git diff --git a/hdw-sniff.c b/hdw-sniff.c index 3aa657b..0259730 100644 --- a/hdw-sniff.c +++ b/hdw-sniff.c @@ -13,6 +13,8 @@ #include #include #include +#include +#include #include #include @@ -27,6 +29,9 @@ #include "hdw-sniff.h" /* my functions */ +/* global variables */ +int file_fd=0; + int main(int argc, char *argv[]) { char pcap_error[PCAP_ERRBUF_SIZE]; @@ -35,7 +40,6 @@ int main(int argc, char *argv[]) { 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 */ @@ -48,7 +52,7 @@ int main(int argc, char *argv[]) { printf("no logfile specified, writing to stdout ...\n"); } else { - if((logfile=fopen(argv[3],"w"))!=NULL) { + if((file_fd=open(argv[3],O_RDWR | O_CREAT))!=0) { printf("writing to logfile %s ...\n",argv[3]); } else { @@ -120,9 +124,10 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, const u_char *package) { /* local variables */ - char tmp_buf[20]; + char tmp_buf[20],crypted_snap[11]; struct linux_wlan_ng_prism_hdr *prism_hdr; struct ieee802_11_hdr *w_hdr; + struct snaphdr *snap_hdr; struct ethhdr *e_hdr; struct iphdr *ip_hdr; struct info_struct *my_info_struct; @@ -137,12 +142,15 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, 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))); - printf("pcap header:\n"); - printf("capture_length: %d (dec.)\t",pcap_header->caplen); - printf("length(off wire): %d (dec.)\n",pcap_header->len); + + /* 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 */ @@ -163,33 +171,101 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, (((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"); - printf("debug: %d\n",(w_hdr->frame_ctl)<<15); - if((w_hdr->frame_ctl & IEEE802_11_STYPE_BEACON)>0) strcpy(tmp_buf,"beacon"); - else strcpy(tmp_buf,"unknown"); - + /* frame type */ + /* management */ + if(!(w_hdr->frame_ctl & 0x0c)) { + 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)>0) + strcpy(tmp_buf,"beacon"); + 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 & data frame type not supported yet"); + /* print out frame type */ printf("=> %s\n",tmp_buf); - printf("duration/id: %x\n",w_hdr->duration_id); + 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"); } /* ieee802.3 */ + /* 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)); + /* ethernet */ if((strncmp(my_info_struct->dev,"eth",3)==0) | ((w_hdr->frame_ctl & IEEE802_11_FTYPE_DATA)>0)) { - printf("ethernet: (%d bytes)\n",e_o); - e_hdr=(struct ethhdr *)(package+p_o+w_o); - /* 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(!(w_hdr->frame_ctl & IEEE802_11_FTYPE_DATA)) { + printf("ethernet: (%d bytes)\n",e_o); + e_hdr=(struct ethhdr *)(package+p_o+w_o); + /* 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":":")); + } + 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)) { + /* we want ip header to get parsed */ + e_hdr->h_proto=htons(ETH_P_IP); + e_o=sizeof(struct snaphdr); + } + } + else { + printf("- crypted packet!\n"); + /* print crypted snap - write into file */ + printf("snap: (iv + crypted aa aa 03 00 00 00) "); + for(i=0;i<10;i++) { + printf("%x ",*(snap_hdr->snap+i)); + crypted_snap[i]=*(snap_hdr->snap+i); + // if(file_fd>0) + // write(file_fd,snap_hdr->snap+i-4,1); + } + printf("\n"); + crypted_snap[10]='\n'; + if(file_fd>0) { + printf("debug: saved to file\n"); + write(file_fd,crypted_snap,11); + } + /* dont look at ipheader */ + e_hdr->h_proto=htons(0); + } + } /* IP ? */ if(ntohs(e_hdr->h_proto)==ETH_P_IP) { @@ -200,16 +276,16 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, printf("service = %x ",ntohs(ip_hdr->tos)); printf("total_length(dec.) = %d \n",ntohs(ip_hdr->tot_len)); printf("source_ip: "); - for(i=3;i>=0;--i) { + for(i=0;i<=3;++i) { printf("%d%s", - ip_hdr->saddr&0xff<saddr&(0xff<<(8*i)))>>(8*i), + (i==3?"\n":".")); } printf("destination_ip: "); - for(i=3;i>=0;--i) { + for(i=0;i<=3;++i) { printf("%d%s", - ip_hdr->daddr&0xff<daddr&(0xff<<(8*i)))>>(8*i), + (i==3?"\n":".")); } printf("ip_id = %x ",ntohs(ip_hdr->id)); printf("ip_offset = %x \n",ntohs(ip_hdr->frag_off));