mirror of
https://github.com/samba-team/samba.git
synced 2025-08-04 08:22:08 +03:00
added code from Philip A Prindeville <philipp@enteka.com> which expands
the interfaces option to this: "interfaces = le0 le1" or "interfaces = all". it uses SIOCGIFxxxx ioctl calls.
This commit is contained in:
Luke Leighton
@ -21,62 +21,29 @@
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#include "includes.h"
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#include <assert.h> /* added by philipp */
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extern int DEBUGLEVEL;
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struct in_addr ipzero;
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struct in_addr wins_ip;
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static struct in_addr default_ip;
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static struct in_addr default_bcast;
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static struct in_addr default_nmask;
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static BOOL got_ip=False;
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static BOOL got_bcast=False;
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static BOOL got_nmask=False;
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struct interface *local_interfaces = NULL;
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struct interface *present_interfaces = NULL;
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struct interface *last_iface;
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/****************************************************************************
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calculate the default netmask for an address
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****************************************************************************/
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static void default_netmask(struct in_addr *inm, struct in_addr *iad)
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{
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uint32 ad = ntohl(iad->s_addr);
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uint32 nm;
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/*
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** Guess a netmask based on the class of the IP address given.
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*/
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if ( (ad & 0x80000000) == 0 ) {
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/* class A address */
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nm = 0xFF000000;
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} else if ( (ad & 0xC0000000) == 0x80000000 ) {
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/* class B address */
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nm = 0xFFFF0000;
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} else if ( (ad & 0xE0000000) == 0xC0000000 ) {
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/* class C address */
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nm = 0xFFFFFF00;
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} else {
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/* class D or E; netmask doesn't make much sense - guess 4 bits */
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nm = 0xFFFFFFF0;
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}
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inm->s_addr = htonl(nm);
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}
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/****************************************************************************
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get the broadcast address for our address
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(troyer@saifr00.ateng.az.honeywell.com)
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****************************************************************************/
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static void get_broadcast(struct in_addr *if_ipaddr,
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struct in_addr *if_bcast,
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struct in_addr *if_nmask)
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static void get_interfaces()
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{
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BOOL found = False;
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#ifndef NO_GET_BROADCAST
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int sock = -1; /* AF_INET raw socket desc */
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char buff[1024];
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struct ifreq *ifr=NULL;
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struct ifreq *ifr=NULL, ifr2;
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int i;
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struct interface *iface, *last_iface = NULL;
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#ifndef ifr_mtu
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#define ifr_mtu ifr_metric
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#endif
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#if defined(EVEREST)
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int n_interfaces;
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@ -88,13 +55,10 @@ static void get_broadcast(struct in_addr *if_ipaddr,
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struct ifconf *ifc;
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#else
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struct ifconf ifc;
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#endif
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#endif
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/* get a default netmask and broadcast */
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default_netmask(if_nmask, if_ipaddr);
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if (present_interfaces) return; /* already initialized */
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#ifndef NO_GET_BROADCAST
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/* Create a socket to the INET kernel. */
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#if USE_SOCKRAW
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if ((sock = socket(AF_INET, SOCK_RAW, PF_INET )) < 0)
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@ -126,11 +90,42 @@ static void get_broadcast(struct in_addr *if_ipaddr,
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ifr = ifc.ifc_req;
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for (i = 0; i < n_interfaces; ++i) {
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if (if_ipaddr->s_addr ==
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((struct sockaddr_in *) &ifr[i].ifr_addr)->sin_addr.s_addr) {
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found = True;
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break;
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}
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ifr2 = ifr[i];
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if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
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DEBUG(0,("SIOCGIFFLAGS failed\n"));
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if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) != IFF_RUNNING)
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continue;
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iface = (struct interface *)malloc(sizeof(*iface));
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assert(iface != NULL);
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iface->next = NULL;
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iface->ip = ((struct sockaddr_in *) &ifr[i].ifr_addr)->sin_addr;
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iface->name = strdup(ifr[i].ifr_name);
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iface->flags = ifr2.ifr_flags;
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/* complete with netmask and b'cast address */
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ifr2 = *ifr;
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if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0)
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DEBUG(0,("SIOCGIFNETMASK failed\n"));
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else
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iface->nmask = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
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if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0)
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DEBUG(0,("SIOCGIFBRDADDR failed\n"));
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else
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iface->bcast = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
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if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0)
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DEBUG(0,("SIOCGIFMTU failed\n"));
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else
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iface->mtu = ifr2.ifr_mtu;
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DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
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if (!present_interfaces)
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present_interfaces = iface;
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else
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last_iface->next = iface;
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last_iface = iface;
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}
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}
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}
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@ -147,10 +142,46 @@ static void get_broadcast(struct in_addr *if_ipaddr,
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/* Loop through interfaces, looking for given IP address */
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for (i = ifc->ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) {
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if (if_ipaddr->s_addr ==
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(*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) {
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found = True;
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break;
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ifr2 = *ifr;
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if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
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DEBUG(0,("SIOCGIFFLAGS failed\n"));
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if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) {
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iface = (struct interface *)malloc(sizeof(*iface));
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assert(iface != NULL);
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iface->next = NULL;
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iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
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iface->name = strdup(ifr->ifr_name);
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iface->flags = ifr2.ifr_flags;
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/* complete with netmask and b'cast address */
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ifr2 = *ifr;
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strioctl.ic_cmd = SIOCGIFNETMASK;
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strioctl.ic_dp = (char *)&ifr2;
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strioctl.ic_len = sizeof(struct ifr2);
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if (ioctl(sock, I_STR, &strioctl) < 0)
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DEBUG(0,("Failed I_STR/SIOCGIFNETMASK: %s\n", strerror(errno)));
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else
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iface->nmask = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
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strioctl.ic_cmd = SIOCGIFBRDADDR;
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if (ioctl(sock, I_STR, &strioctl) < 0)
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DEBUG(0,("SIOCGIFBRDADDR failed\n"));
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else
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iface->bcast = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr;
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strioctl.ic_cmd = SIOCGIFMTU;
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if (ioctl(sock, I_STR, &strioctl) < 0)
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DEBUG(0,("SIOCGIFMTU failed\n"));
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else
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iface->mtu = ifr2.ifr_mtu;
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DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
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if (!present_interfaces)
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present_interfaces = iface;
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else
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last_iface->next = iface;
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last_iface = iface;
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}
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}
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}
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@ -164,11 +195,42 @@ static void get_broadcast(struct in_addr *if_ipaddr,
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/* Loop through interfaces, looking for given IP address */
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i = ifc.ifc_len;
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while (i > 0) {
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if (if_ipaddr->s_addr ==
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(*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) {
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found = True;
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break;
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ifr2 = *ifr;
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if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
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DEBUG(0,("SIOCGIFFLAGS failed\n"));
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if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) {
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iface = (struct interface *)malloc(sizeof(*iface));
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assert(iface != NULL);
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iface->next = NULL;
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iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
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iface->name = strdup(ifr->ifr_name);
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iface->flags = ifr2.ifr_flags;
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/* complete with netmask and b'cast address */
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ifr2 = *ifr;
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if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0)
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DEBUG(0,("SIOCGIFNETMASK failed\n"));
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else
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iface->nmask = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
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if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0)
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DEBUG(0,("SIOCGIFBRDADDR failed\n"));
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else
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iface->bcast = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
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if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0)
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DEBUG(0,("SIOCGIFMTU failed\n"));
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else
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iface->mtu = ifr2.ifr_mtu;
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DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
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if (!present_interfaces)
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present_interfaces = iface;
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else
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last_iface->next = iface;
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last_iface = iface;
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}
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i -= ifr->ifr_addr.sa_len + IFNAMSIZ;
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ifr = (struct ifreq*) ((char*) ifr + ifr->ifr_addr.sa_len + IFNAMSIZ);
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}
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@ -183,70 +245,53 @@ static void get_broadcast(struct in_addr *if_ipaddr,
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/* Loop through interfaces, looking for given IP address */
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for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) {
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ifr2 = *ifr;
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if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0)
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DEBUG(0,("SIOCGIFFLAGS failed\n"));
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if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) {
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#ifdef BSDI
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if (ioctl(sock, SIOCGIFADDR, ifr) < 0) break;
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if (ioctl(sock, SIOCGIFADDR, ifr) < 0) break;
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#endif
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if (if_ipaddr->s_addr ==
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(*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) {
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found = True;
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break;
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iface = (struct interface *)malloc(sizeof(*iface));
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assert(iface != NULL);
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iface->next = NULL;
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iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr;
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iface->name = strdup(ifr->ifr_name);
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iface->flags = ifr2.ifr_flags;
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/* complete with netmask and b'cast address */
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ifr2 = *ifr;
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if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0)
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DEBUG(0,("SIOCGIFNETMASK failed\n"));
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else
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iface->nmask = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
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if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0)
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DEBUG(0,("SIOCGIFBRDADDR failed\n"));
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else
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iface->bcast = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr;
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if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0)
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DEBUG(0,("SIOCGIFMTU failed\n"));
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else
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iface->mtu = ifr2.ifr_mtu;
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DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask)));
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if (!present_interfaces)
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present_interfaces = iface;
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else
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last_iface->next = iface;
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last_iface = iface;
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}
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}
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}
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#endif
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if (!found) {
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DEBUG(0,("No interface found for address %s\n", inet_ntoa(*if_ipaddr)));
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} else {
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/* Get the netmask address from the kernel */
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#ifdef USE_IFREQ
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ifreq = *ifr;
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strioctl.ic_cmd = SIOCGIFNETMASK;
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strioctl.ic_dp = (char *)&ifreq;
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strioctl.ic_len = sizeof(struct ifreq);
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if (ioctl(sock, I_STR, &strioctl) < 0)
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DEBUG(0,("Failed I_STR/SIOCGIFNETMASK: %s\n", strerror(errno)));
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else
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*if_nmask = ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr;
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#else
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if (ioctl(sock, SIOCGIFNETMASK, ifr) < 0)
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DEBUG(0,("SIOCGIFNETMASK failed\n"));
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else
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*if_nmask = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr;
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#endif
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DEBUG(4,("Netmask for %s = %s\n", ifr->ifr_name,
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inet_ntoa(*if_nmask)));
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}
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/* Close up shop */
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(void) close(sock);
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#endif
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/* sanity check on the netmask */
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{
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uint32 nm = ntohl(if_nmask->s_addr);
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if ((nm >> 24) != 0xFF) {
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DEBUG(0,("Impossible netmask %s - using defaults\n",inet_ntoa(*if_nmask)));
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default_netmask(if_nmask, if_ipaddr);
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}
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}
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/* derive the broadcast assuming a 1's broadcast, as this is what
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all MS operating systems do, we have to comply even if the unix
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box is setup differently */
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{
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uint32 ad = ntohl(if_ipaddr->s_addr);
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uint32 nm = ntohl(if_nmask->s_addr);
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uint32 bc = (ad & nm) | (0xffffffff & ~nm);
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if_bcast->s_addr = htonl(bc);
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}
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DEBUG(4,("Derived broadcast address %s\n", inet_ntoa(*if_bcast)));
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} /* get_broadcast */
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} /* get_interfaces */
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/****************************************************************************
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@ -257,42 +302,68 @@ static void interpret_interfaces(char *s, struct interface **interfaces,
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{
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char *ptr = s;
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fstring token;
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struct interface *iface;
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struct in_addr ip;
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struct interface *iface, *i;
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BOOL seenALL = False;
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ipzero = *interpret_addr2("0.0.0.0");
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wins_ip = *interpret_addr2("255.255.255.255");
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while (next_token(&ptr,token,NULL)) {
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/* parse it into an IP address/netmasklength pair */
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char *p = strchr(token,'/');
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if (p) *p = 0;
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get_interfaces();
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ip = *interpret_addr2(token);
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while (next_token(&ptr,token,NULL)) {
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if (strcasecmp(token, "ALL")) {
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if (*interfaces) {
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DEBUG(0, ("Error: interface name \"ALL\" must occur alone\n"));
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/* should do something here ... */
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}
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/* should we copy the list, or just point at it? */
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for (i = present_interfaces; i; i = i->next) {
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iface = (struct interface *)malloc(sizeof(*iface));
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if (!iface) return;
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*iface = *i;
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iface->next = NULL;
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if (!(*interfaces))
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(*interfaces) = iface;
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else
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last_iface->next = iface;
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last_iface = iface;
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}
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seenALL = True;
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continue;
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} else if (seenALL) {
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DEBUG(0, ("Error: can't mix interface \"ALL\" with other interface namess\n"));
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continue;
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}
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/* maybe we already have it listed */
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{
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struct interface *i;
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for (i=(*interfaces);i;i=i->next)
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if (ip_equal(ip,i->ip)) break;
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if (i) continue;
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}
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for (i=(*interfaces);i;i=i->next)
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if (strcasecmp(token,i->name)) break;
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if (i) continue;
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iface = (struct interface *)malloc(sizeof(*iface));
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if (!iface) return;
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iface->ip = ip;
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/* make sure name is known */
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for (i=present_interfaces;i;i=i->next)
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if (strcasecmp(token,i->name)) break;
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if (p) {
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if (strlen(p+1)>2)
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iface->nmask = *interpret_addr2(p+1);
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else
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iface->nmask.s_addr = htonl(~((1<<(32-atoi(p+1)))-1));
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} else {
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default_netmask(&iface->nmask,&iface->ip);
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if (!i) {
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DEBUG(0, ("Warning: unknown interface \"%s\" specified\n", token));
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continue;
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}
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iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr;
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*iface = *i;
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iface->next = NULL;
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if (iface->bcast.s_addr != (iface->ip.s_addr | ~iface->nmask.s_addr)) {
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DEBUG(0, ("Warning: overriding b'cast address %s on interface %s\n",
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inet_ntoa(iface->bcast), iface->name));
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iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr;
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}
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if (!(*interfaces)) {
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(*interfaces) = iface;
|
||||
@ -305,41 +376,8 @@ static void interpret_interfaces(char *s, struct interface **interfaces,
|
||||
DEBUG(1,("nmask=%s\n",inet_ntoa(iface->nmask)));
|
||||
}
|
||||
|
||||
if (*interfaces) return;
|
||||
|
||||
/* setup a default interface */
|
||||
iface = (struct interface *)malloc(sizeof(*iface));
|
||||
if (!iface) return;
|
||||
|
||||
iface->next = NULL;
|
||||
|
||||
if (got_ip) {
|
||||
iface->ip = default_ip;
|
||||
} else {
|
||||
get_myname(NULL,&iface->ip);
|
||||
}
|
||||
|
||||
if (got_bcast) {
|
||||
iface->bcast = default_bcast;
|
||||
} else {
|
||||
get_broadcast(&iface->ip,&iface->bcast,&iface->nmask);
|
||||
}
|
||||
|
||||
if (got_nmask) {
|
||||
iface->nmask = default_nmask;
|
||||
iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr;
|
||||
}
|
||||
|
||||
if (iface->bcast.s_addr != (iface->ip.s_addr | ~iface->nmask.s_addr)) {
|
||||
DEBUG(2,("Warning: inconsistant interface %s\n",inet_ntoa(iface->ip)));
|
||||
}
|
||||
|
||||
iface->next = NULL;
|
||||
(*interfaces) = last_iface = iface;
|
||||
|
||||
DEBUG(1,("Added interface ip=%s ",inet_ntoa(iface->ip)));
|
||||
DEBUG(1,("bcast=%s ",inet_ntoa(iface->bcast)));
|
||||
DEBUG(1,("nmask=%s\n",inet_ntoa(iface->nmask)));
|
||||
if (! *interfaces)
|
||||
DEBUG(0,("Error: no interfaces specified.\n"));
|
||||
}
|
||||
|
||||
|
||||
@ -358,20 +396,8 @@ void load_interfaces(void)
|
||||
**************************************************************************/
|
||||
void iface_set_default(char *ip,char *bcast,char *nmask)
|
||||
{
|
||||
if (ip) {
|
||||
got_ip = True;
|
||||
default_ip = *interpret_addr2(ip);
|
||||
}
|
||||
|
||||
if (bcast) {
|
||||
got_bcast = True;
|
||||
default_bcast = *interpret_addr2(bcast);
|
||||
}
|
||||
|
||||
if (nmask) {
|
||||
got_nmask = True;
|
||||
default_nmask = *interpret_addr2(nmask);
|
||||
}
|
||||
DEBUG(0, ("iface_set_default: function deprecated.\n"));
|
||||
exit(1);
|
||||
}
|
||||
|
||||
|
||||
@ -453,5 +479,3 @@ struct in_addr *iface_ip(struct in_addr ip)
|
||||
return(&iface_find(ip)->ip);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user