bcopeland
commented
6 years ago On Thu, Apr 26, 2018 at 09:14:56AM -0700, Xian Guo wrote:
Dear bob copeland， I am learning to use wmediumd. I hope that I can add codes in the following codes and output the detail information of the dropped packets in log file. But I don't know how to modified codes in program wmediumd.c . Can you tell me how to implement it. Thanks a lot! if (drand48() <= error_prob) { w_logf(ctx, LOG_INFO, "Dropped mcast from " MAC_FMT " to " MAC_FMT " at receiver\n", MAC_ARGS(src), MAC_ARGS(station->addr)); continue; }
If you just want to see what's in there, dump the buffer starting at frame->data which is frame->data_len bytes long.
If you find you have to do this a lot or have a lot of packets to go through, then I would suggest writing out a pcap file that you could later investigate with wireshark. It has a fairly simple structure:
iamxg
Dear bob copeland， I am learning to use wmediumd. I hope that I can add codes in the following codes and output the detail information of the dropped packets in log file. But I don't know how to modified codes in program wmediumd.c . Can you tell me how to implement it. Thanks a lot! if (drand48() <= error_prob) { w_logf(ctx, LOG_INFO, "Dropped mcast from " MAC_FMT " to " MAC_FMT " at receiver\n", MAC_ARGS(src), MAC_ARGS(station->addr)); continue; } Best Regards， Xian Guo