└── HW1_107062650
├── main.c
├── lib.c
├── lib.h
├── makefile
└── README.md
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produce the binary "hw1"
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remove the binary "hw1"
- [10%] List TCP and UDP connetions (IPv4).
- [10%] List TCP and UDP connetions (IPv6).
- [30%] Show corresponding program names and arguments for each identified connection.
The program names are extracted from /proc/[PID]/cmdline.
It only shows the first arguments for each program, because original netstat does so,too.
If the connections are created by other users, program names will be displayed as "-", because it has no permission to examine other users' connection and original netstat do so,too.
- [10%] Implement -u and --udp option using getopt_long(3).
- [10%] Implement -t and --tcp option using getopt_long(3).
It use getopt_long(3) to parse both the short and long command-line arguments.
It supports to use two types of flag in the same time, e.g.,"-tu","-ut","-t -u","--tcp --udp".
- [10%] Translate network address into user-friendly formats, e.g., from 0100007F to 127.0.0.1/
It use inet_ntop(3) to accomplish the feature.
It support both IPv4 and IPv6.
The functionality has been tested by "017AA8C0 <===> 192.168.122.1" and
> > >"BACD0120000000000000000052965732 <===> 2001:cdba::3257:9652"
- [10%] Implement basic filter string feature.
It filter the program name of the connection.
It can only filter "one" string.
- [10%] Use Makefile to manage the building process of your program.
It compiles three .h/.c files and creates "hw1" binary file automatically.
$ ./hw1
List of TCP connections:
Proto Local Address Foreign Address PID/Program name and arguments
tcp 127.0.0.1:5939 0.0.0.0:0 -
tcp 127.0.1.1:53 0.0.0.0:0 -
tcp 127.0.0.1:631 0.0.0.0:0 -
tcp 192.168.2.42:52000 172.217.160.110:443 2381/chrome --type=
tcp 192.168.2.42:50362 176.9.127.15:443 -
tcp 192.168.2.42:52696 64.233.188.188:5228 2381/chrome --type=
tcp 192.168.2.42:52838 13.35.3.158:443 2381/chrome --type=
tcp 192.168.2.42:34042 119.161.14.18:443 2381/chrome --type=
tcp 192.168.2.42:60658 198.252.206.25:443 2381/chrome --type=
tcp 192.168.2.42:48120 172.217.24.10:443 2381/chrome --type=
tcp 192.168.2.42:49460 216.58.200.35:443 2381/chrome --type=
tcp 192.168.2.42:52476 172.217.160.110:443 2381/chrome --type=
tcp 192.168.2.42:53778 13.115.86.198:443 2381/chrome --type=
tcp 192.168.2.42:39864 119.161.16.12:443 2381/chrome --type=
tcp 192.168.2.42:40402 3.217.150.63:443 2381/chrome --type=
tcp 192.168.2.42:40404 3.217.150.63:443 2381/chrome --type=
tcp 192.168.2.42:44150 172.217.27.142:443 2381/chrome --type=
tcp 192.168.2.42:49502 172.217.24.3:443 2381/chrome --type=
tcp 192.168.2.42:39858 119.161.16.12:443 2381/chrome --type=
tcp6 ::1:631 :::0 -
List of UDP connections:
Proto Local Address Foreign Address PID/Program name and arguments
udp 224.0.0.251:5353 0.0.0.0:0 2335/chrome
udp 0.0.0.0:5353 0.0.0.0:0 -
udp 0.0.0.0:47080 0.0.0.0:0 -
udp 0.0.0.0:40046 0.0.0.0:0 -
udp 127.0.1.1:53 0.0.0.0:0 -
udp 0.0.0.0:68 0.0.0.0:0 -
udp 0.0.0.0:631 0.0.0.0:0 -
udp6 :::44348 :::0 -
udp6 :::5353 :::0 - $ ./hw1 --tcp chrome
List of TCP connections:
Proto Local Address Foreign Address PID/Program name and arguments
tcp 192.168.2.42:52000 172.217.160.110:443 2381/chrome --type=
tcp 192.168.2.42:52696 64.233.188.188:5228 2381/chrome --type=
tcp 192.168.2.42:52838 13.35.3.158:443 2381/chrome --type=
tcp 192.168.2.42:34042 119.161.14.18:443 2381/chrome --type=
tcp 192.168.2.42:60658 198.252.206.25:443 2381/chrome --type=
tcp 192.168.2.42:48120 172.217.24.10:443 2381/chrome --type=
tcp 192.168.2.42:49460 216.58.200.35:443 2381/chrome --type=
tcp 192.168.2.42:52476 172.217.160.110:443 2381/chrome --type=
tcp 192.168.2.42:53778 13.115.86.198:443 2381/chrome --type=
tcp 192.168.2.42:39864 119.161.16.12:443 2381/chrome --type=
tcp 192.168.2.42:40402 3.217.150.63:443 2381/chrome --type=
tcp 192.168.2.42:40404 3.217.150.63:443 2381/chrome --type=
tcp 192.168.2.42:44150 172.217.27.142:443 2381/chrome --type=
tcp 192.168.2.42:49502 172.217.24.3:443 2381/chrome --type=
tcp 192.168.2.42:39858 119.161.16.12:443 2381/chrome --type=