diff options
| -rw-r--r-- | source3/lib/interface.c | 396 |
1 files changed, 186 insertions, 210 deletions
diff --git a/source3/lib/interface.c b/source3/lib/interface.c index e03333280a..940af1eccf 100644 --- a/source3/lib/interface.c +++ b/source3/lib/interface.c @@ -21,29 +21,62 @@ #include "includes.h" -#include <assert.h> /* added by philipp */ - 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 *present_interfaces = NULL; struct interface *last_iface; -static void get_interfaces() +/**************************************************************************** +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, ifr2; + struct ifreq *ifr=NULL; int i; - struct interface *iface, *last_iface = NULL; - -#ifndef ifr_mtu -#define ifr_mtu ifr_metric -#endif #if defined(EVEREST) int n_interfaces; @@ -56,9 +89,12 @@ static void get_interfaces() #else struct ifconf ifc; #endif +#endif - if (present_interfaces) return; /* already initialized */ + /* 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) @@ -90,42 +126,11 @@ static void get_interfaces() ifr = ifc.ifc_req; for (i = 0; i < n_interfaces; ++i) { - ifr2 = ifr[i]; - if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0) - DEBUG(0,("SIOCGIFFLAGS failed\n")); - - if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) != IFF_RUNNING) - continue; - - iface = (struct interface *)malloc(sizeof(*iface)); - assert(iface != NULL); - iface->next = NULL; - iface->ip = ((struct sockaddr_in *) &ifr[i].ifr_addr)->sin_addr; - iface->name = strdup(ifr[i].ifr_name); - iface->flags = ifr2.ifr_flags; - - /* complete with netmask and b'cast address */ - ifr2 = *ifr; - if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0) - DEBUG(0,("SIOCGIFNETMASK failed\n")); - else - iface->nmask = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr; - if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0) - DEBUG(0,("SIOCGIFBRDADDR failed\n")); - else - iface->bcast = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr; - if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0) - DEBUG(0,("SIOCGIFMTU failed\n")); - else - iface->mtu = ifr2.ifr_mtu; - - DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask))); - - if (!present_interfaces) - present_interfaces = iface; - else - last_iface->next = iface; - last_iface = iface; + if (if_ipaddr->s_addr == + ((struct sockaddr_in *) &ifr[i].ifr_addr)->sin_addr.s_addr) { + found = True; + break; + } } } } @@ -142,46 +147,10 @@ static void get_interfaces() /* Loop through interfaces, looking for given IP address */ for (i = ifc->ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) { - ifr2 = *ifr; - if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0) - DEBUG(0,("SIOCGIFFLAGS failed\n")); - - if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) { - - iface = (struct interface *)malloc(sizeof(*iface)); - assert(iface != NULL); - iface->next = NULL; - iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr; - iface->name = strdup(ifr->ifr_name); - iface->flags = ifr2.ifr_flags; - - /* complete with netmask and b'cast address */ - ifr2 = *ifr; - strioctl.ic_cmd = SIOCGIFNETMASK; - strioctl.ic_dp = (char *)&ifr2; - strioctl.ic_len = sizeof(struct ifr2); - if (ioctl(sock, I_STR, &strioctl) < 0) - DEBUG(0,("Failed I_STR/SIOCGIFNETMASK: %s\n", strerror(errno))); - else - iface->nmask = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr; - strioctl.ic_cmd = SIOCGIFBRDADDR; - if (ioctl(sock, I_STR, &strioctl) < 0) - DEBUG(0,("SIOCGIFBRDADDR failed\n")); - else - iface->bcast = ((struct sockaddr_in *)&ifr2.ifr_addr)->sin_addr; - strioctl.ic_cmd = SIOCGIFMTU; - if (ioctl(sock, I_STR, &strioctl) < 0) - DEBUG(0,("SIOCGIFMTU failed\n")); - else - iface->mtu = ifr2.ifr_mtu; - - DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask))); - - if (!present_interfaces) - present_interfaces = iface; - else - last_iface->next = iface; - last_iface = iface; + if (if_ipaddr->s_addr == + (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr.s_addr) { + found = True; + break; } } } @@ -195,42 +164,11 @@ static void get_interfaces() /* Loop through interfaces, looking for given IP address */ i = ifc.ifc_len; while (i > 0) { - ifr2 = *ifr; - if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0) - DEBUG(0,("SIOCGIFFLAGS failed\n")); - - if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) { - iface = (struct interface *)malloc(sizeof(*iface)); - assert(iface != NULL); - iface->next = NULL; - iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr; - iface->name = strdup(ifr->ifr_name); - iface->flags = ifr2.ifr_flags; - - /* complete with netmask and b'cast address */ - ifr2 = *ifr; - if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0) - DEBUG(0,("SIOCGIFNETMASK failed\n")); - else - iface->nmask = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr; - if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0) - DEBUG(0,("SIOCGIFBRDADDR failed\n")); - else - iface->bcast = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr; - if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0) - DEBUG(0,("SIOCGIFMTU failed\n")); - else - iface->mtu = ifr2.ifr_mtu; - - DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask))); - - if (!present_interfaces) - present_interfaces = iface; - else - last_iface->next = iface; - last_iface = iface; + 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); } @@ -245,53 +183,70 @@ static void get_interfaces() /* Loop through interfaces, looking for given IP address */ for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) { - ifr2 = *ifr; - if (ioctl(sock, SIOCGIFFLAGS, &ifr2) < 0) - DEBUG(0,("SIOCGIFFLAGS failed\n")); - - if ((ifr2.ifr_flags & (IFF_RUNNING | IFF_LOOPBACK)) == IFF_RUNNING) { #ifdef BSDI - if (ioctl(sock, SIOCGIFADDR, ifr) < 0) break; + if (ioctl(sock, SIOCGIFADDR, ifr) < 0) break; #endif - - iface = (struct interface *)malloc(sizeof(*iface)); - assert(iface != NULL); - iface->next = NULL; - iface->ip = (*(struct sockaddr_in *) &ifr->ifr_addr).sin_addr; - iface->name = strdup(ifr->ifr_name); - iface->flags = ifr2.ifr_flags; - - /* complete with netmask and b'cast address */ - ifr2 = *ifr; - if (ioctl(sock, SIOCGIFNETMASK, &ifr2) < 0) - DEBUG(0,("SIOCGIFNETMASK failed\n")); - else - iface->nmask = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr; - if (ioctl(sock, SIOCGIFBRDADDR, &ifr2) < 0) - DEBUG(0,("SIOCGIFBRDADDR failed\n")); - else - iface->bcast = (*(struct sockaddr_in *)&ifr2.ifr_addr).sin_addr; - if (ioctl(sock, SIOCGIFMTU, &ifr2) < 0) - DEBUG(0,("SIOCGIFMTU failed\n")); - else - iface->mtu = ifr2.ifr_mtu; - - DEBUG(4,("Netmask for %s = %s\n", iface->name, inet_ntoa(iface->nmask))); - - if (!present_interfaces) - present_interfaces = iface; - else - last_iface->next = iface; - last_iface = iface; + 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 */ -} /* get_interfaces */ /**************************************************************************** @@ -302,68 +257,42 @@ static void interpret_interfaces(char *s, struct interface **interfaces, { char *ptr = s; fstring token; - struct interface *iface, *i; - BOOL seenALL = False; + struct interface *iface; + struct in_addr ip; ipzero = *interpret_addr2("0.0.0.0"); wins_ip = *interpret_addr2("255.255.255.255"); - get_interfaces(); - while (next_token(&ptr,token,NULL)) { + /* parse it into an IP address/netmasklength pair */ + char *p = strchr(token,'/'); + if (p) *p = 0; - if (strcasecmp(token, "ALL")) { - if (*interfaces) { - DEBUG(0, ("Error: interface name \"ALL\" must occur alone\n")); - /* should do something here ... */ - } - - /* should we copy the list, or just point at it? */ - for (i = present_interfaces; i; i = i->next) { - iface = (struct interface *)malloc(sizeof(*iface)); - if (!iface) return; - - *iface = *i; - iface->next = NULL; - - if (!(*interfaces)) - (*interfaces) = iface; - else - last_iface->next = iface; - last_iface = iface; - } - - seenALL = True; - continue; - } else if (seenALL) { - DEBUG(0, ("Error: can't mix interface \"ALL\" with other interface namess\n")); - continue; - } + ip = *interpret_addr2(token); /* maybe we already have it listed */ - for (i=(*interfaces);i;i=i->next) - if (strcasecmp(token,i->name)) break; - if (i) continue; + { + 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; - /* make sure name is known */ - for (i=present_interfaces;i;i=i->next) - if (strcasecmp(token,i->name)) break; + iface->ip = ip; - if (!i) { - DEBUG(0, ("Warning: unknown interface \"%s\" specified\n", token)); - continue; + 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 = *i; + iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr; iface->next = NULL; - if (iface->bcast.s_addr != (iface->ip.s_addr | ~iface->nmask.s_addr)) { - DEBUG(0, ("Warning: overriding b'cast address %s on interface %s\n", - inet_ntoa(iface->bcast), iface->name)); - iface->bcast.s_addr = iface->ip.s_addr | ~iface->nmask.s_addr; - } if (!(*interfaces)) { (*interfaces) = iface; @@ -376,8 +305,41 @@ static void interpret_interfaces(char *s, struct interface **interfaces, DEBUG(1,("nmask=%s\n",inet_ntoa(iface->nmask))); } - if (! *interfaces) - DEBUG(0,("Error: no interfaces specified.\n")); + 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))); } @@ -396,8 +358,20 @@ void load_interfaces(void) **************************************************************************/ void iface_set_default(char *ip,char *bcast,char *nmask) { - DEBUG(0, ("iface_set_default: function deprecated.\n")); - exit(1); + 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); + } } @@ -479,3 +453,5 @@ struct in_addr *iface_ip(struct in_addr ip) return(&iface_find(ip)->ip); } + + |