diff options
Diffstat (limited to 'contrib/bind/lib/irs/gethostent.c')
| -rw-r--r-- | contrib/bind/lib/irs/gethostent.c | 212 |
1 files changed, 177 insertions, 35 deletions
diff --git a/contrib/bind/lib/irs/gethostent.c b/contrib/bind/lib/irs/gethostent.c index 586fa49..8e7e717 100644 --- a/contrib/bind/lib/irs/gethostent.c +++ b/contrib/bind/lib/irs/gethostent.c @@ -16,7 +16,7 @@ */ #if !defined(LINT) && !defined(CODECENTER) -static const char rcsid[] = "$Id: gethostent.c,v 1.29 2001/05/29 05:48:44 marka Exp $"; +static const char rcsid[] = "$Id: gethostent.c,v 1.32 2002/05/27 06:50:55 marka Exp $"; #endif /* Imports */ @@ -458,34 +458,34 @@ freehostent(struct hostent *he) { * -1 on failure. */ -static int -scan_interfaces(int *have_v4, int *have_v6) { -#ifndef SIOCGLIFCONF -/* map new to old */ -#define SIOCGLIFCONF SIOCGIFCONF -#define lifc_len ifc_len -#define lifc_buf ifc_buf - struct ifconf lifc; +#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR) && \ + !defined(IRIX_EMUL_IOCTL_SIOCGIFCONF) + +#ifdef __hpux +#define lifc_len iflc_len +#define lifc_buf iflc_buf +#define lifc_req iflc_req +#define LIFCONF if_laddrconf #else #define SETFAMILYFLAGS - struct lifconf lifc; -#endif - -#ifndef SIOCGLIFADDR -/* map new to old */ -#define SIOCGLIFADDR SIOCGIFADDR +#define LIFCONF lifconf #endif - -#ifndef SIOCGLIFFLAGS -#define SIOCGLIFFLAGS SIOCGIFFLAGS -#define lifr_addr ifr_addr -#define lifr_name ifr_name -#define lifr_flags ifr_flags + +#ifdef __hpux +#define lifr_addr iflr_addr +#define lifr_name iflr_name +#define lifr_dstaddr iflr_dstaddr +#define lifr_flags iflr_flags #define ss_family sa_family - struct ifreq lifreq; +#define LIFREQ if_laddrreq #else - struct lifreq lifreq; +#define LIFREQ lifreq #endif + +static int +scan_interfaces6(int *have_v4, int *have_v6) { + struct LIFCONF lifc; + struct LIFREQ lifreq; struct in_addr in4; struct in6_addr in6; char *buf = NULL, *cp, *cplim; @@ -496,7 +496,7 @@ scan_interfaces(int *have_v4, int *have_v6) { *have_v4 = *have_v6 = 0; /* Get interface list from system. */ - if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) == -1) goto err_ret; /* @@ -508,20 +508,11 @@ scan_interfaces(int *have_v4, int *have_v6) { if (buf == NULL) goto err_ret; #ifdef SETFAMILYFLAGS - lifc.lifc_family = AF_UNSPEC; + lifc.lifc_family = AF_UNSPEC; /* request all families */ lifc.lifc_flags = 0; #endif lifc.lifc_len = bufsiz; lifc.lifc_buf = buf; -#ifdef IRIX_EMUL_IOCTL_SIOCGIFCONF - /* - * This is a fix for IRIX OS in which the call to ioctl with - * the flag SIOCGIFCONF may not return an entry for all the - * interfaces like most flavors of Unix. - */ - if (emul_ioctl(&lifc) >= 0) - break; -#else if ((n = ioctl(s, SIOCGLIFCONF, (char *)&lifc)) != -1) { /* * Some OS's just return what will fit rather @@ -534,7 +525,6 @@ scan_interfaces(int *have_v4, int *have_v6) { if (lifc.lifc_len + 2 * sizeof(lifreq) < bufsiz) break; } -#endif if ((n == -1) && errno != EINVAL) goto err_ret; @@ -620,6 +610,158 @@ scan_interfaces(int *have_v4, int *have_v6) { return (-1); } +#endif + +static int +scan_interfaces(int *have_v4, int *have_v6) { + struct ifconf ifc; + union { + char _pad[256]; /* leave space for IPv6 addresses */ + struct ifreq ifreq; + } u; + struct in_addr in4; + struct in6_addr in6; + char *buf = NULL, *cp, *cplim; + static unsigned int bufsiz = 4095; + int s, n; + size_t cpsize; + +#if defined(SIOCGLIFCONF) && defined(SIOCGLIFADDR) && \ + !defined(IRIX_EMUL_IOCTL_SIOCGIFCONF) + /* + * Try to scan the interfaces using IPv6 ioctls(). + */ + if (!scan_interfaces6(have_v4, have_v6)) + return (0); +#endif + + /* Set to zero. Used as loop terminators below. */ + *have_v4 = *have_v6 = 0; + + /* Get interface list from system. */ + if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + goto err_ret; + + /* + * Grow buffer until large enough to contain all interface + * descriptions. + */ + for (;;) { + buf = memget(bufsiz); + if (buf == NULL) + goto err_ret; + ifc.ifc_len = bufsiz; + ifc.ifc_buf = buf; +#ifdef IRIX_EMUL_IOCTL_SIOCGIFCONF + /* + * This is a fix for IRIX OS in which the call to ioctl with + * the flag SIOCGIFCONF may not return an entry for all the + * interfaces like most flavors of Unix. + */ + if (emul_ioctl(&ifc) >= 0) + break; +#else + if ((n = ioctl(s, SIOCGIFCONF, (char *)&ifc)) != -1) { + /* + * Some OS's just return what will fit rather + * than set EINVAL if the buffer is too small + * to fit all the interfaces in. If + * ifc.ifc_len is too near to the end of the + * buffer we will grow it just in case and + * retry. + */ + if (ifc.ifc_len + 2 * sizeof(u.ifreq) < bufsiz) + break; + } +#endif + if ((n == -1) && errno != EINVAL) + goto err_ret; + + if (bufsiz > 1000000) + goto err_ret; + + memput(buf, bufsiz); + bufsiz += 4096; + } + + /* Parse system's interface list. */ + cplim = buf + ifc.ifc_len; /* skip over if's with big ifr_addr's */ + for (cp = buf; + (*have_v4 == 0 || *have_v6 == 0) && cp < cplim; + cp += cpsize) { + memcpy(&u.ifreq, cp, sizeof u.ifreq); +#ifdef HAVE_SA_LEN +#ifdef FIX_ZERO_SA_LEN + if (u.ifreq.ifr_addr.sa_len == 0) + u.ifreq.ifr_addr.sa_len = 16; +#endif +#ifdef HAVE_MINIMUM_IFREQ + cpsize = sizeof u.ifreq; + if (u.ifreq.ifr_addr.sa_len > sizeof (struct sockaddr)) + cpsize += (int)u.ifreq.ifr_addr.sa_len - + (int)(sizeof (struct sockaddr)); +#else + cpsize = sizeof u.ifreq.ifr_name + u.ifreq.ifr_addr.sa_len; +#endif /* HAVE_MINIMUM_IFREQ */ + if (cpsize > sizeof u.ifreq && cpsize <= sizeof u) + memcpy(&u.ifreq, cp, cpsize); +#elif defined SIOCGIFCONF_ADDR + cpsize = sizeof u.ifreq; +#else + cpsize = sizeof u.ifreq.ifr_name; + /* XXX maybe this should be a hard error? */ + if (ioctl(s, SIOCGIFADDR, (char *)&u.ifreq) < 0) + continue; +#endif + switch (u.ifreq.ifr_addr.sa_family) { + case AF_INET: + if (*have_v4 == 0) { + memcpy(&in4, + &((struct sockaddr_in *) + &u.ifreq.ifr_addr)->sin_addr, + sizeof in4); + if (in4.s_addr == INADDR_ANY) + break; + n = ioctl(s, SIOCGIFFLAGS, (char *)&u.ifreq); + if (n < 0) + break; + if ((u.ifreq.ifr_flags & IFF_UP) == 0) + break; + *have_v4 = 1; + } + break; + case AF_INET6: + if (*have_v6 == 0) { + memcpy(&in6, + &((struct sockaddr_in6 *) + &u.ifreq.ifr_addr)->sin6_addr, + sizeof in6); + if (memcmp(&in6, &in6addr_any, sizeof in6) == 0) + break; + n = ioctl(s, SIOCGIFFLAGS, (char *)&u.ifreq); + if (n < 0) + break; + if ((u.ifreq.ifr_flags & IFF_UP) == 0) + break; + *have_v6 = 1; + } + break; + } + } + if (buf != NULL) + memput(buf, bufsiz); + close(s); + /* printf("scan interface -> 4=%d 6=%d\n", *have_v4, *have_v6); */ + return (0); + err_ret: + if (buf != NULL) + memput(buf, bufsiz); + if (s != -1) + close(s); + /* printf("scan interface -> 4=%d 6=%d\n", *have_v4, *have_v6); */ + return (-1); +} + static struct hostent * copyandmerge(struct hostent *he1, struct hostent *he2, int af, int *error_num) { struct hostent *he = NULL; |
