X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=hdw-sniff.c;h=bd0b8edabee6a367ff58a8951fbd60ab5ab6d104;hb=f495a11c9e880f1f55aa8e6c44c065228e55e5c5;hp=7a549e5ecc3e1ea43970b792b7436935efb049e7;hpb=2d887777866454a450211bd1373b0f716abb9fb4;p=my-code%2Fhdw-sniff.git diff --git a/hdw-sniff.c b/hdw-sniff.c index 7a549e5..bd0b8ed 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"); } } @@ -135,7 +139,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, 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; + int i,p_o,w_o,e_o,i_o,special_o=0; my_info_struct=(struct info_struct *)info; ++(my_info_struct->count); @@ -168,7 +172,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, /* 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))) { + 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)); @@ -184,6 +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) @@ -202,9 +207,11 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, :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); + add_ssid_2_list(tmp_buf2,beacon_hdr->capability, + my_info_struct->ssid_list); } else if((w_hdr->frame_ctl & IEEE802_11_STYPE_ATIM)>0) strcpy(tmp_buf,"announcement traffic indication message"); @@ -216,10 +223,12 @@ 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); - printf(" %s%s\n",tmp_buf1,tmp_buf2); + 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)? @@ -233,6 +242,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, 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)); @@ -256,7 +266,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, printf("- no encryption!\n"); if(snap_hdr->proto==ntohs(ETH_P_IP)) { e_o=sizeof(struct snaphdr); - parse_ip(snap_hdr+e_o); + parse_ip((char *)(snap_hdr+e_o)); } } @@ -292,7 +302,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, /* 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 @@ -331,10 +341,10 @@ int parse_ip(char *ip_o) { printf("ip protocol:\n"); ip_hdr=(struct iphdr *)ip_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("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", @@ -348,8 +358,26 @@ int parse_ip(char *ip_o) { (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("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; +}