Check this link. http://www.daimi.au.dk/~kasperd/comp.os.linux.development.faq.html One of the queries is related to getting the IP address. -Mani -----Original Message----- From: kernelnewbies-bounce@nl.linux.org [mailto:kernelnewbies-bounce@nl.linux.org]On Behalf Of paridhi bansal Sent: Tuesday, November 19, 2002 4:36 PM To: Mani Mahadevan; kernelnewbies@nl.linux.org Subject: RE: Information abt rotuing and interfaces Hi I don't think this call will help becoz i am getting the correct ip in this form.: For 151.2.123.75 i am getting 0.0.151.2 127.0.0.0 i am getting 0.0.127.0 SO it is getting the right ips but somehow there is some minor problem.What's the way out?? Paridhi --- Mani Mahadevan <mrsmani@cisco.com> wrote: > Its just one of the ioctl commands. > ioctl (sockfd, SIOCGIFINDEX,ifr) > > -Mani > > -----Original Message----- > From: paridhi bansal > [mailto:paridhibansal@yahoo.com] > Sent: Tuesday, November 19, 2002 4:06 PM > To: Mani Mahadevan > Subject: RE: Information abt rotuing and interfaces > > > I am new to nw prog..Could u pls tell me how to use > SIOCGIFINDEX.. > > Paridhi > --- Mani Mahadevan <mrsmani@cisco.com> wrote: > > * Fill in the Index Value using SIOCGIFINDEX > > (Preventive measure) > > * Dump the contents in Hex..say from ifr > > ->ifr_addr.sa_data[0] > > to ifr ->ifr_addr.sa_data[3] and check. > > > > HTH > > -Mani > > > > > > -----Original Message----- > > From: paridhi bansal > > [mailto:paridhibansal@yahoo.com] > > Sent: Tuesday, November 19, 2002 3:05 PM > > To: Mani Mahadevan; kernelnewbies@nl.linux.org; > > dharmenderr@cybage.comT > > Subject: RE: Information abt rotuing and > interfaces > > > > > > Thanx for the answers. I am able to get the some > > portion of the ips but not the complete ip of the > > interfaces. Here's the code i am using. Could u > pls > > tell me whre exactly is the error??Thanx in > advance. > > > > #include<stdio.h> > > #include<net/if.h> > > #include<sys/ioctl.h> > > #include<sys/socket.h> > > #include<netdb.h> > > > > #define BUFSIZ 4096 > > > > main() > > { > > > > int s,n; > > struct ifconf ifc; > > char buf[BUFSIZ]; > > struct ifreq *ifr; > > struct in_addr *iff; > > > > s=socket(AF_INET, SOCK_DGRAM, 0); > > ifc.ifc_len = sizeof(buf); > > ifc.ifc_buf = buf; > > if (ioctl(s, SIOCGIFCONF, (char *) &ifc) < 0) > > { > > printf("\nError1"); > > } > > > > ifr = ifc.ifc_req; > > printf("Before for loop"); > > > > for (n=ifc.ifc_len/sizeof(struct ifreq); --n >= > 0; > > ifr++) > > { > > printf("\nPrinting name: %s" ,ifr->ifr_name); > > > > if(ioctl(s, SIOCGIFADDR, (char *)ifr) < 0) > > printf("\nError2"); > > else > > { > > iff=(struct in_addr *)(ifr > > ->ifr_addr.sa_data > > ); > > printf("\nPrinting address: > > %s",inet_aton(*iff)); > > } > > > > if(ioctl(s, SIOCGIFNETMASK, (char *)ifr) < 0) > > printf("\nError3"); > > else > > { > > iff=(struct in_addr *)(ifr > > ->ifr_netmask.sa_data ); > > printf("\nPrinting mask: > > %s",inet_aton(*iff)); > > } > > > > > > Paridhi > > --- Mani Mahadevan <mrsmani@cisco.com> wrote: > > > Thanks for correcting me. > > > > > > -Mani > > > > > > -----Original Message----- > > > From: kernelnewbies-bounce@nl.linux.org > > > [mailto:kernelnewbies-bounce@nl.linux.org]On > > Behalf > > > Of Dharmender Rai > > > Sent: Tuesday, November 19, 2002 12:08 PM > > > To: Mani Mahadevan; paridhi bansal; > > > kernelnewbies@nl.linux.org > > > Subject: RE: Information abt rotuing and > > interfaces > > > > > > > > > routing info can be found in /etc/gateways > > > --- Mani Mahadevan <mrsmani@cisco.com> wrote: > > * > > > For > > > getting the Interface List use SIOCGIFCONF cmd > > > > in ioctl. > > > > * Then use the SIOCGIFFLAGS ioctl cmd for each > > of > > > > the above found interface > > > > and check for ifr.ifr_flags to be IFF_UP. > This > > > > would tell you whether the > > > > interface is > > > > Up or not. > > > > * Go thru the list of ioctl commands in > > > > linux/sockios.h & use them > > > > appropriately > > > > as per your requirement. > > > > > > > > * Reg routing it should be in the /proc, but > not > > > > sure about the exact > > > > loaction. > > > > > > > > -Mani > > > > > > > > > > > > -----Original Message----- > > > > From: kernelnewbies-bounce@nl.linux.org > > > > [mailto:kernelnewbies-bounce@nl.linux.org]On > > > Behalf > > > > Of paridhi bansal > > > > Sent: Monday, November 18, 2002 2:40 PM > > > > To: kernelnewbies@nl.linux.org > > > > Subject: Information abt rotuing and > interfaces > > > > > > > > > > > > Hi!! > > > > > > > > Can somebody tell me how can i get the all > > > > information > > > > abt the interfaces that r up on my machine > using > > > > ioctl > > > > call??? > > > > > > > > Where is the kernel file that stores the > routing > > > > information?? > > > > > > > > Paridhi > > > > > > > > > > __________________________________________________ > > > > Do you Yahoo!? > > > > Yahoo! Web Hosting - Let the expert host your > > site > > > > http://webhosting.yahoo.com > > > > -- > > > > Kernelnewbies: Help each other learn about the > > > Linux > > > > kernel. > > > > Archive: > > > > http://mail.nl.linux.org/kernelnewbies/ > > > > FAQ: http://kernelnewbies.org/faq/ > > > > > > > > > > > ATTACHMENT part 2 application/ms-tnef > > > name=winmail.dat > > > > > > > > > > __________________________________________________ > > > Do You Yahoo!? > > > Everything you'll ever need on one web page > > > from News and Sport to Email and Music Charts > > > http://uk.my.yahoo.com > > > -- > > > Kernelnewbies: Help each other learn about the > > Linux > > > kernel. > === message truncated === __________________________________________________ Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site http://webhosting.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
