X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=hdw-sniff.c;h=54e40dbc1ac22bfdc6bb8c39a9aab35dcf89d790;hb=6da514c21607236c5dff3a1395088cbfb3b17a0a;hp=ab67722a20b5565004269f8ebd33dc40664de063;hpb=95e482eef2af91c6bb150d4e92cb73503d6b8fb9;p=my-code%2Fhdw-sniff.git diff --git a/hdw-sniff.c b/hdw-sniff.c index ab67722..54e40db 100644 --- a/hdw-sniff.c +++ b/hdw-sniff.c @@ -12,6 +12,9 @@ #include #include #include +#include +#include +#include /* IEEE 802.3 stuff -- i will concentrate on .11 stuff before! */ #include /* for ethhdr struct */ @@ -28,6 +31,9 @@ int main(int argc, char *argv[]) { 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]; FILE *logfile; struct info_struct my_info_struct; @@ -69,13 +75,42 @@ int main(int argc, char *argv[]) { 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); + + /* 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 */ - pcap_loop(pcap_handle,-1,pcap_process,(u_char *)&my_info_struct); + 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=500000; + + 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; } @@ -87,8 +122,8 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, /* 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 ip *ip_hdr; struct info_struct *my_info_struct; int i; @@ -133,6 +168,7 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, /* ieee802.3 */ /* ethernet */ + printf("ethernet:\n"); e_hdr=(struct ethhdr *)package; /* what types ? */ printf("type = "); @@ -166,4 +202,24 @@ void pcap_process(u_char *info,const struct pcap_pkthdr *pcap_header, printf("\n"); } - +int hop_channel(struct info_struct *info,int foo_fd) { + struct iwreq my_iwreq; + + if (info->channel>=14) 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); + printf("debug: %d\n",foo_fd); + 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) { + printf("unable to hop channels\n"); + perror("ioctl"); + return -1; + } + printf("debug: hopped to channel %d\n",info->channel); + ++(info->channel); + return 0; +}