Sockets Practice: portsweep.c

portsweep.c loops through a file of IPs and checks whether a particular port is open:

dennis@ipa:~/projects/sockets/portsweep$ ./portsweep
portsweep [-l logfile] ipfile port1[,port2,...]

dennis@ipa:~/projects/sockets/portsweep$ ./portsweep ips 22,23,80,2049
192.168.1.1: 23 80
192.168.1.101:
127.0.0.1: 22 2049