X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=hdw-sniff.c;h=d2e70776557d7ecd3b45cf68f2fcbcbb5eb68284;hb=91a86e79de34bb35c6abd72f6f71990de904915c;hp=025973038d2fd854ce1bd1925b59538de9011913;hpb=9ddf092558413b5a929e7c6068efa732f68fc24c;p=my-code%2Fhdw-sniff.git diff --git a/hdw-sniff.c b/hdw-sniff.c index 0259730..d2e7077 100644 --- a/hdw-sniff.c +++ b/hdw-sniff.c @@ -4,6 +4,8 @@ * author: hackbard@hackdaworld.dyndns.org */ +#define _GNU_SOURCE + #include #include #include @@ -22,6 +24,7 @@ #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 */ @@ -54,9 +57,10 @@ int main(int argc, char *argv[]) { 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!\n"); + printf("can't open logfile. not logged to file!\n"); } } @@ -86,9 +90,12 @@ int main(int argc, char *argv[]) { return 1; } - /* grab a package until user breaks */ + /* 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 */ @@ -124,14 +131,15 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, const u_char *package) { /* local variables */ - char tmp_buf[20],crypted_snap[11]; + 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 iphdr *ip_hdr; struct info_struct *my_info_struct; - int i,p_o,w_o,e_o,i_o; + int i,p_o,w_o,e_o,i_o,special_o=0; my_info_struct=(struct info_struct *)info; ++(my_info_struct->count); @@ -154,7 +162,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, /* wireless stuff */ /* prism wlan ng headers */ - if((my_info_struct->mmode-0x30==1) && + 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; @@ -162,6 +170,12 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, 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); @@ -174,6 +188,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, /* 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) @@ -186,8 +201,16 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, 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) + 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) @@ -198,29 +221,26 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, 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 */ + 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"); } - /* 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)) { + ((w_hdr->frame_ctl & IEEE802_11_FTYPE_DATA)==IEEE802_11_FTYPE_DATA)) { - if(!(w_hdr->frame_ctl & 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)); @@ -230,6 +250,8 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, 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); @@ -241,69 +263,53 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, (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); + parse_ip(snap_hdr+e_o); } + } else { printf("- crypted packet!\n"); /* print crypted snap - write into file */ - printf("snap: (iv + crypted aa aa 03 00 00 00) "); + 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); - // if(file_fd>0) - // write(file_fd,snap_hdr->snap+i-4,1); } + /* 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]='\n'; + crypted_snap[10]='\0'; + crypted_snap[11]='\n'; + if(file_fd>0) { printf("debug: saved to file\n"); - write(file_fd,crypted_snap,11); + dprintf(file_fd,IVLINE,IVL_ARGS); } - /* dont look at ipheader */ - e_hdr->h_proto=htons(0); - } - } - - /* IP ? */ - if(ntohs(e_hdr->h_proto)==ETH_P_IP) { - printf("ip protocol: (%d bytes)\n",i_o); - ip_hdr=(struct iphdr *)(package+p_o+w_o+e_o); - printf("version = %x ",ntohs(ip_hdr->version)); - printf("header_length = %x \n",ntohs(ip_hdr->ihl)); - printf("service = %x ",ntohs(ip_hdr->tos)); - printf("total_length(dec.) = %d \n",ntohs(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",ntohs(ip_hdr->frag_off)); - printf("time2live = %x ip_proto = %x\n",ntohs(ip_hdr->ttl), - ntohs(ip_hdr->protocol)); - // printf("chksum: %x\n",ntohs(ip_hdr->ip_sum)); } } - /* check what we have ... */ + /* dump it */ +#ifdef SHOW_HEX printf("all dump: (hex)\n"); - for(i=p_o+w_o;icaplen;i++) + 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) { @@ -311,11 +317,10 @@ int hop_channel(struct info_struct *info,int foo_fd) { struct iwreq my_iwreq; - if (info->channel>=14) info->channel=1; + if (info->channel>=C_MAX) info->channel=1; memset(&my_iwreq,0,sizeof(my_iwreq)); strcpy(my_iwreq.ifr_name,info->dev); - printf("debug: channel = %d\n",info->channel); my_iwreq.u.freq.e=0; my_iwreq.u.freq.m=info->channel; if((ioctl(foo_fd,SIOCSIWFREQ,&my_iwreq))==-1) { @@ -327,3 +332,50 @@ int hop_channel(struct info_struct *info,int foo_fd) { } 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; +}