diff options
Diffstat (limited to 'source/lib/interface.c')
| -rw-r--r-- | source/lib/interface.c | 457 |
1 files changed, 0 insertions, 457 deletions
diff --git a/source/lib/interface.c b/source/lib/interface.c deleted file mode 100644 index 147425d0fc1..00000000000 --- a/source/lib/interface.c +++ /dev/null @@ -1,457 +0,0 @@ -/* - Unix SMB/Netbios implementation. - Version 1.9. - multiple interface handling - Copyright (C) Andrew Tridgell 1992-1997 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include "includes.h" - -extern int DEBUGLEVEL; - -struct in_addr ipzero; -struct in_addr wins_ip; -static struct in_addr default_ip; -static struct in_addr default_bcast; -static struct in_addr default_nmask; -static BOOL got_ip=False; -static BOOL got_bcast=False; -static BOOL got_nmask=False; - -struct interface *local_interfaces = NULL; - -struct interface *last_iface; - -/**************************************************************************** -calculate the default netmask for an address -****************************************************************************/ -static void default_netmask(struct in_addr *inm, struct in_addr *iad) -{ - uint32 ad = ntohl(iad->s_addr); - uint32 nm; - /* - ** Guess a netmask based on the class of the IP address given. - */ - if ( (ad & 0x80000000) == 0 ) { - /* class A address */ - nm = 0xFF000000; - } else if ( (ad & 0xC0000000) == 0x80000000 ) { - /* class B address */ - nm = 0xFFFF0000; - } else if ( (ad & 0xE0000000) == 0xC0000000 ) { - /* class C address */ - nm = 0xFFFFFF00; - } else { - /* class D or E; netmask doesn't make much sense - guess 4 bits */ - nm = 0xFFFFFFF0; - } - inm->s_addr = htonl(nm); -} - - -/**************************************************************************** - get the broadcast address for our address -(troyer@saifr00.ateng.az.honeywell.com) -****************************************************************************/ -static void get_broadcast(struct in_addr *if_ipaddr, - struct in_addr *if_bcast, - struct in_addr *if_nmask) -{ - BOOL found = False; -#ifndef NO_GET_BROADCAST - int sock = -1; /* AF_INET raw socket desc */ - char buff[1024]; - struct ifreq *ifr=NULL; - int i; - -#if defined(EVEREST) - int n_interfaces; - struct ifconf ifc; - struct ifreq *ifreqs; -#elif defined(USE_IFREQ) - struct ifreq ifreq; - struct strioctl strioctl; - struct ifconf *ifc; -#else - struct ifconf ifc; -#endif -#endif - - /* get a default netmask and broadcast */ - default_netmask(if_nmask, if_ipaddr); - -#ifndef NO_GET_BROADCAST - /* Create a socket to the INET kernel. */ -#if USE_SOCKRAW - if ((sock = socket(AF_INET, SOCK_RAW, PF_INET )) < 0) -#else - if ((sock = socket(AF_INET, SOCK_DGRAM, 0 )) < 0) -#endif - { - DEBUG(0,( "Unable to open socket to get broadcast address\n")); - return; - } - - /* Get a list of the configured interfaces */ -#ifdef EVEREST - /* This is part of SCO Openserver 5: The ioctls are no longer part - if the lower level STREAMS interface glue. They are now real - ioctl calls */ - - if (ioctl(sock, SIOCGIFANUM, &n_interfaces) < 0) { - DEBUG(0,( "SIOCGIFANUM: %s\n", strerror(errno))); - } else { - DEBUG(0,( "number of interfaces returned is: %d\n", n_interfaces)); - - ifc.ifc_len = sizeof(struct ifreq) * n_interfaces; - ifc.ifc_buf = (caddr_t) alloca(ifc.ifc_len); - - if (ioctl(sock, SIOCGIFCONF, &ifc) < 0) - DEBUG(0, ( "SIOCGIFCONF: %s\n", strerror(errno))); - else { - ifr = ifc.ifc_req; - - for (i = 0; i < n_interfaces; ++i) { - if (if_ipaddr->s_addr == - ((struct sockaddr_in *) &ifr[i].ifr_addr)->sin_addr.s_addr) { - found = True; - break; - } - } - } - } -#elif defined(USE_IFREQ) - ifc = (struct ifconf *)buff; - ifc->ifc_len = BUFSIZ - sizeof(struct ifconf); - strioctl.ic_cmd = SIOCGIFCONF; - strioctl.ic_dp = (char *)ifc; - strioctl.ic_len = sizeof(buff); - if (ioctl(sock, I_STR, &strioctl) < 0) { - DEBUG(0,( "I_STR/SIOCGIFCONF: %s\n", strerror(errno))); - } else { - ifr = (struct ifreq *)ifc->ifc_req; - - /* Loop through interfaces, looking for given IP address */ - for (i = ifc->ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) { - if (if_ipaddr->s_addr == - (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) { - found = True; - break; - } - } - } -#elif defined(__FreeBSD__) || defined(NETBSD) || defined(AMIGA) || defined(_AIX41) - ifc.ifc_len = sizeof(buff); - ifc.ifc_buf = buff; - if (ioctl(sock, SIOCGIFCONF, &ifc) < 0) { - DEBUG(0,("SIOCGIFCONF: %s\n", strerror(errno))); - } else { - ifr = ifc.ifc_req; - /* Loop through interfaces, looking for given IP address */ - i = ifc.ifc_len; - while (i > 0) { - if (if_ipaddr->s_addr == - (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) { - found = True; - break; - } - i -= ifr->ifr_addr.sa_len + IFNAMSIZ; - ifr = (struct ifreq*) ((char*) ifr + ifr->ifr_addr.sa_len + IFNAMSIZ); - } - } -#else - ifc.ifc_len = sizeof(buff); - ifc.ifc_buf = buff; - if (ioctl(sock, SIOCGIFCONF, &ifc) < 0) { - DEBUG(0,("SIOCGIFCONF: %s\n", strerror(errno))); - } else { - ifr = ifc.ifc_req; - - /* Loop through interfaces, looking for given IP address */ - for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) { -#ifdef BSDI - if (ioctl(sock, SIOCGIFADDR, ifr) < 0) break; -#endif - if (if_ipaddr->s_addr == - (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) { - found = True; - break; - } - } - } -#endif - - if (!found) { - DEBUG(0,("No interface found for address %s\n", inet_ntoa(*if_ipaddr))); - } else { - /* Get the netmask address from the kernel */ -#ifdef USE_IFREQ - ifreq = *ifr; - - strioctl.ic_cmd = SIOCGIFNETMASK; - strioctl.ic_dp = (char *)&ifreq; - strioctl.ic_len = sizeof(struct ifreq); - if (ioctl(sock, I_STR, &strioctl) < 0) - DEBUG(0,("Failed I_STR/SIOCGIFNETMASK: %s\n", strerror(errno))); - else - *if_nmask = ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr; -#else - if (ioctl(sock, SIOCGIFNETMASK, ifr) < 0) - DEBUG(0,("SIOCGIFNETMASK failed\n")); - else - *if_nmask = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; -#endif - - DEBUG(4,("Netmask for %s = %s\n", ifr->ifr_name, - inet_ntoa(*if_nmask))); - } - - /* Close up shop */ - (void) close(sock); - -#endif - - /* sanity check on the netmask */ - { - uint32 nm = ntohl(if_nmask->s_addr); - if ((nm >> 24) != 0xFF) { - DEBUG(0,("Impossible netmask %s - using defaults\n",inet_ntoa(*if_nmask))); - default_netmask(if_nmask, if_ipaddr); - } - } - - /* derive the broadcast assuming a 1's broadcast, as this is what - all MS operating systems do, we have to comply even if the unix - box is setup differently */ - { - uint32 ad = ntohl(if_ipaddr->s_addr); - uint32 nm = ntohl(if_nmask->s_addr); - uint32 bc = (ad & nm) | (0xffffffff & ~nm); - if_bcast->s_addr = htonl(bc); - } - - DEBUG(4,("Derived broadcast address %s\n", inet_ntoa(*if_bcast))); -} /* get_broadcast */ - - - -/**************************************************************************** -load a list of network interfaces -****************************************************************************/ -static void interpret_interfaces(char *s, struct interface **interfaces, - char *description) -{ - char *ptr = s; - fstring token; - struct interface *iface; - struct in_addr ip; - - ipzero = *interpret_addr2("0.0.0.0"); - wins_ip = *interpret_addr2("255.255.255.255"); - - while (next_token(&ptr,token,NULL)) { - /* parse it into an IP address/netmasklength pair */ - char *p = strchr(token,'/'); - if (p) *p = 0; - - ip = *interpret_addr2(token); - - /* maybe we already have it listed */ - { - struct interface *i; - for (i=(*interfaces);i;i=i->next) - if (ip_equal(ip,i->ip)) break; - if (i) continue; - } - - iface = (struct interface *)malloc(sizeof(*iface)); - if (!iface) return; - - iface->ip = ip; - - if (p) { - if (strlen(p+1)>2) - iface->nmask = *interpret_addr2(p+1); - else - iface->nmask.s_addr = htonl(~((1<<(32-atoi(p+1)))-1)); - } else { - default_netmask(&iface->nmask,&iface->ip); - } - iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr; - iface->next = NULL; - - if (!(*interfaces)) { - (*interfaces) = iface; - } else { - last_iface->next = iface; - } - last_iface = iface; - DEBUG(1,("Added %s ip=%s ",description,inet_ntoa(iface->ip))); - DEBUG(1,("bcast=%s ",inet_ntoa(iface->bcast))); - 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(2,("Added interface ip=%s ",inet_ntoa(iface->ip))); - DEBUG(2,("bcast=%s ",inet_ntoa(iface->bcast))); - DEBUG(2,("nmask=%s\n",inet_ntoa(iface->nmask))); -} - - -/**************************************************************************** -load the remote and local interfaces -****************************************************************************/ -void load_interfaces(void) -{ - /* add the machine's interfaces to local interface structure*/ - interpret_interfaces(lp_interfaces(), &local_interfaces,"interface"); -} - - -/**************************************************************************** - override the defaults - **************************************************************************/ -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); - } -} - - -/**************************************************************************** - check if an IP is one of mine - **************************************************************************/ -BOOL ismyip(struct in_addr ip) -{ - struct interface *i; - for (i=local_interfaces;i;i=i->next) - if (ip_equal(i->ip,ip)) return True; - return False; -} - -/**************************************************************************** - check if a bcast is one of mine - **************************************************************************/ -BOOL ismybcast(struct in_addr bcast) -{ - struct interface *i; - for (i=local_interfaces;i;i=i->next) - if (ip_equal(i->bcast,bcast)) return True; - return False; -} - -/**************************************************************************** - how many interfaces do we have - **************************************************************************/ -int iface_count(void) -{ - int ret = 0; - struct interface *i; - - for (i=local_interfaces;i;i=i->next) - ret++; - return ret; -} - -/**************************************************************************** - return IP of the Nth interface - **************************************************************************/ -struct in_addr *iface_n_ip(int n) -{ - struct interface *i; - - for (i=local_interfaces;i && n;i=i->next) - n--; - - if (i) return &i->ip; - return NULL; -} - -static struct interface *iface_find(struct in_addr ip) -{ - struct interface *i; - if (zero_ip(ip)) return local_interfaces; - - for (i=local_interfaces;i;i=i->next) - if (same_net(i->ip,ip,i->nmask)) return i; - - return local_interfaces; -} - -/* these 3 functions return the ip/bcast/nmask for the interface - most appropriate for the given ip address */ - -struct in_addr *iface_bcast(struct in_addr ip) -{ - return(&iface_find(ip)->bcast); -} - -struct in_addr *iface_nmask(struct in_addr ip) -{ - return(&iface_find(ip)->nmask); -} - -struct in_addr *iface_ip(struct in_addr ip) -{ - return(&iface_find(ip)->ip); -} - - - |