-----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of kanhu rauta Sent: Wednesday, September 28, 2005 8:03 AM To: redhat-list@xxxxxxxxxx Subject: ioctl problem I want to add an alias IP into a particular interface through ioclt call. I used SIOCSIFADDR and SIOCSIFNETMASK to add the IP with the netmask. one problem here i am facing, instead of adding the alias IP it replace the actual IP of that interface. In my code i gave the interface name as "eth0" not "eth0:0 or eth0:1" due to some constrain. int add_alias_ip(){ struct ifreq ifr; int sockfd; if( (sockfd=socket(AF_INET,SOCK_DGRAM,0))<0){ ..................... ..................... } memset (&ifr, '\0', sizeof (ifr)); ifr.ifr_addr=AF_INET; ifr.ifr_dstaddr=AF_INET; ifr.ifr_netmask=AF_INET; strncpy (ifr.ifr_name, "eth0", 4); ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = inet_addr("192.168.50.11"); if (ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) { ................. ................. } ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = inet_addr("255.255.255.192"); if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) { ................... ................... } return 0; } pls give some suggestion......... Kanhu Charan Rauta Innomedia Techonologies Pvt. Ltd #3278,12Th Main, HAL 2nd stage. Banglore-560008. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=subscribe https://www.redhat.com/mailman/listinfo/redhat-list Hello Kanhu, For all alias IP addresses I've seen, netmask was always 255.255.255.255. I guess the alias IP netmask should at least be different from the one for your main IP address. Have you tried that? I may be barking up the wrong tree but it's worth a try. Michael -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
