diff options
Diffstat (limited to 'src/kdc/network.c')
| -rw-r--r-- | src/kdc/network.c | 40 |
1 files changed, 32 insertions, 8 deletions
diff --git a/src/kdc/network.c b/src/kdc/network.c index 502682a..a91fc95 100644 --- a/src/kdc/network.c +++ b/src/kdc/network.c @@ -1,7 +1,7 @@ /* * kdc/network.c * - * Copyright 1990 by the Massachusetts Institute of Technology. + * Copyright 1990,2000 by the Massachusetts Institute of Technology. * * Export of this software from the United States of America may * require a specific license from the United States Government. @@ -35,6 +35,7 @@ #include <sys/ioctl.h> #include <syslog.h> +#include <stddef.h> #include <ctype.h> #ifdef HAVE_NETINET_IN_H #include <sys/types.h> @@ -120,13 +121,14 @@ foreach_localaddr (data, pass1fn, betweenfn, pass2fn) int (*betweenfn) (void *); int (*pass2fn) (void *, struct sockaddr *); { - struct ifreq *ifr, ifreq; + struct ifreq *ifr, ifreq, *ifr2; struct ifconf ifc; - int s, code, n, i; + int s, code, n, i, j; int est_if_count = 8, est_ifreq_size; char *buf = 0; size_t current_buf_size = 0; - + int fail = 0; + s = socket (USE_AF, USE_TYPE, USE_PROTO); if (s < 0) return SOCKET_ERRNO; @@ -184,6 +186,7 @@ foreach_localaddr (data, pass1fn, betweenfn, pass2fn) continue; } + #ifdef IFF_LOOPBACK /* None of the current callers want loopback addresses. */ if (ifreq.ifr_flags & IFF_LOOPBACK) @@ -193,13 +196,32 @@ foreach_localaddr (data, pass1fn, betweenfn, pass2fn) if (!(ifreq.ifr_flags & IFF_UP)) goto skip; + /* Make sure we didn't process this address already. */ + for (j = 0; j < i; j += ifreq_size(*ifr2)) { + ifr2 = (struct ifreq *)((caddr_t) ifc.ifc_buf+j); + if (ifr2->ifr_name[0] == 0) + continue; + if (ifr2->ifr_addr.sa_family == ifr->ifr_addr.sa_family + && ifreq_size (*ifr) == ifreq_size (*ifr2) + /* Compare address info. If this isn't good enough -- + i.e., if random padding bytes turn out to differ + when the addresses are the same -- then we'll have + to do it on a per address family basis. */ + && !memcmp (&ifr2->ifr_addr.sa_data, &ifr->ifr_addr.sa_data, + (ifreq_size (*ifr) + - offsetof (struct ifreq, ifr_addr.sa_data)))) + goto skip; + } + if ((*pass1fn) (data, &ifr->ifr_addr)) { - abort (); + fail = 1; + goto punt; } } if (betweenfn && (*betweenfn)(data)) { - abort (); + fail = 1; + goto punt; } if (pass2fn) @@ -211,13 +233,15 @@ foreach_localaddr (data, pass1fn, betweenfn, pass2fn) continue; if ((*pass2fn) (data, &ifr->ifr_addr)) { - abort (); + fail = 1; + goto punt; } } + punt: closesocket(s); free (buf); - return 0; + return fail; } struct socksetup { |