int payload_splice(u_char **str, struct listhdr *l, struct payload *p, FILE *log){
int size = 0, i = 0, start = 0;
*str = NULL;
while(l->pld_list != p){//先找到帧的起始标志
start=flag_find(l->pld_list->mpld, l->pld_list->plen, 0);
if(start!=-1 && start!=l->pld_list->plen-1){
if(l->pld_list->mpld[start+1]==PPP_FLAG)
start++;
size = size + l->pld_list->plen - start;
*str = (u_char *)realloc(*str, size*sizeof(u_char));
for(;i<size;i++)
(*str)[i] = l->pld_list->mpld[start+i];
fprintf(log, "%d\t", l->pld_list->pnum);
payload_pop(l);
break;
}
fprintf(log, "%d\t", l->pld_list->pnum);
payload_pop(l);
}
while(l->pld_list != p){
size = size + l->pld_list->plen;
*str = (u_char *)realloc(*str, size*sizeof(u_char));
for(;i<size;i++)
(*str)[i] = l->pld_list->mpld[l->pld_list->plen+i-size];
//释放队列中相应单元
fprintf(log, "%d\t", l->pld_list->pnum);
payload_pop(l);
}
return size;
}
int cli_parse(const int argc, const char **argv)
{
options_init();
flag_t *flag;
const char *arg;
int i;
for (arg = argv[i=1]; i < argc; arg = argv[++i]) {
flag = NULL;
if (flag_is_long_flag(arg)) {
flag = flag_find_by_name(arg+2);
}
else if (flag_is_short_flag(arg)) {
flag = flag_find(arg[1]);
}
else if (flag_is_filename(arg)) {
flag = flag_find_by_name("in");
options_set_with_arg(flag, arg);
continue;
}
if (!flag) {
log_error("unknown flag \'%s\'", arg);
return 0;
}
else if (flag->args > 0) {
if (i+1 < argc)
options_set_with_arg(flag, argv[++i]);
else {
log_error("flag \'%s\' needs an argument", arg);
return 0;
}
}
else {
options_set(flag);
}
}
if (options->out_filename == NULL && options->in_filename == NULL) {
log_error("at least one filename (input or output) has to be declared");
return 0;
}
log_info("parsed arguments from command line");
return 1;
}
int ppp_complt(u_char *frame, int frame_size, struct framehdr *fh,
struct msidhash *mh, struct radiushash *rh, FILE *output){
//返回获得的IP数据包个数
int ipnum = 0, start = 0, end = 0;
_Int16 *protocol = 0, *size = 0;
u_char t[2];
while(start < frame_size){
if((end = flag_find(frame, frame_size, start+1)) == -1)
break;
start+=1;
if(start != end){
frame_escape((frame+start),end-start);
protocol = (_Int16 *)(frame+start+2);
switch(*protocol){
// case IPV4:
// //是IP协议说明是数据帧，进行解封装处理
// start+=4;
// t[0] = frame[start+2]; t[1] = frame[start+3];
// size = (_Int16 *)t;
// *size = short_displace(*size);
// fwrite(size, 1, sizeof(_Int16), output);
// fwrite((frame+start), 1, *size, output);
// ipnum++;
// break;
case IPCP:
start+=4;
IPCP_handler((frame+start), fh, mh, rh);
break;
default:
break;
}
start = end;
}
}
return ipnum;
}
