From 8f2ece695d8822e9ecc63ecd157e90bf17a6fe65 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sat, 2 Aug 1997 21:00:51 +0000 Subject: Update. 1997-08-02 21:27 Ulrich Drepper * inet/Makefile (headers): Rename netinet/inbits.h to bits/in.h. * inet/netinet/in.h: Include bits/in.h instead of netinet/inbits.h. * sysdeps/generic/netinet/inbits.h: Move to... * sysdeps/generic/bits/in.h: ... here. * sysdeps/unix/sysv/linux/bits/inbits.h: Move to ... * sysdeps/unix/sysv/linux/bits/in.h: ... here. * nis/Makefile (headers): Add bits/nislib.h. * nis/rpcsvc/nislib.h: Moved to .... * nis/bits/nislib.h: ... here. * nis/nss_compat/compat-grp.c: Don't include . * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * nis/nss_nisplus/nisplus-alias.c: Likewise. * nis/nss_nisplus/nisplus-ethers.c: Likewise. * nis/nss_nisplus/nisplus-grp.c: Likewise. * nis/nss_nisplus/nisplus-hosts.c: Likewise. * nis/nss_nisplus/nisplus-netgrp.c: Likewise. * nis/nss_nisplus/nisplus-ntework.c: Likewise. * nis/nss_nisplus/nisplus-proto.c: Likewise. * nis/nss_nisplus/nisplus-publickey.c: Likewise. * nis/nss_nisplus/nisplus-pwd.c: Likewise. * nis/nss_nisplus/nisplus-rpc.c: Likewise. * nis/nss_nisplus/nisplus-service.c: Likewise. * nis/nss_nisplus/nisplus-spwd.c: Likewise. * nis/rpcsvc/nis.x: Include bits/nislib.h, not rpcsvc/nislib.h. * nis/rpcsvc/nis.h: Likewise. * inet/getnameinfo.c (nrl_domainname): Change return type to const char *. (getnameinfo): Change type of local variable c to const char *. * inet/inet_ntoa.c: Rewrite to use __libc_once for initialization. * stdlib/fmtmsg.c: Likewise. * intl/bindtextdom.c: Update from latest gettext. * intl/dcgettext.c: Likewise. * intl/finddomain.c: Likewise. * intl/l10nflist.c: Likewise. * intl/localealias.c: Likewise. * intl/textdomain.c: Likewise. * login/getutid_r.c: Remove parameter to setutent call. * login/getutline_r.c: Likewise. * posix/wordexp.c: Complete rewrite. Not fully implemented yet, though. Patch by Tim Waugh . * stdio-common/printf_fp.c: Remove relative include paths. * stdio-common/printf_fphex.c: Likewise. * sysdeps/generic/crypt.h: Cleanup. Don't define non standard elements unless __USE_GNU. * sysdeps/generic/vlimit.c: Pretty print. * sysdeps/generic/vtimes.c: Likewise. * sysdeps/i386/elf/bsd-_setjmp.S: New file. Empty dummy file. * sysdeps/i386/elf/bsd-setjmp.S: New file. Empty dummy file. * sysdeps/i386/elf/setjmp.S: New file. Define __setjmp and also weak definitions of setjmp and _setjmp. * sysdeps/i386/fpu/bits/mathinline.h: More patches by John Bowman. * sysdeps/stub/if_index.h: Set errno in all functions and add stub warnings. * sysdeps/stub/libc-lock.h: Add __libc_once. 1997-08-02 01:57 Ulrich Drepper * sysdeps/unix/sysv/linux/ptrace.c: Don't set errno in error case since the __syscall_ptrace call already did this. Reported by Philip Gladstone . 1997-07-29 Andreas Jaeger * sysdeps/unix/sysv/linux/sys/fsuid.h: Change include to . 1997-08-01 23:18 Ulrich Drepper * csu/defs.awk: Fix regexp for end and align. Patch by Klaus Espenlaub . * locale/programs/localedef.c (print_escaped): New function. (show_info): Use print_escaped if strings can control unprintable characters. Patch by Jochen Hein . 1997-08-01 18:45 Thorsten Kukuk * nis/nss_nisplus/nisplus-alias.c: Fix NULL pointer problems * nis/nss_nisplus/nisplus-grp.c: Likewise. 1997-07-31 Andreas Schwab * elf/dl-profile.c (_dl_start_profile): Use _dl_sysdep_error instead of fprintf. 1997-07-31 Andreas Schwab * manual/socket.texi (Host Address Functions): Fix arguments of @deftypefun. 1997-07-31 Andreas Schwab * elf/dl-runtime.c: Avoid warning about profile_fixup being unused. * sysdeps/m68k/dl-machine.h: Add support for shared library profiling. 1997-07-31 Andreas Schwab * md5-crypt/Makefile (extra-objs): Add onlymd5-crypt.o for dependencies. 1997-07-31 Andreas Schwab * Make-dist (subdirs): Distribute both aout and elf. 1997-07-31 23:04 Mark Kettenis * login/utmp-private.h: Remove reset argument from backend setutent. * login/getutent_r.c (__setutent): Allways call the setutent function in the daemon backend. (setutent_unknown): Function removed. (getutent_unknown, pututline_unknown): Call __setutent instead of setutent_unknown. * login/utmp_file.c (setutent_file): Removed reset argument. All callers changed. * login/utmp_daemon.c (setutent_daemon): Removed reset argument. All callers changed. Try to open connection even if a previous connection failed, but first check if the sockets exist in the filesystem. * login/utmp_daemon.c (pututline_daemon): Try to open connection before reporting failure. * login/programs/database.c (open_database): Create compatibility file if it does not already exist. Supply mode argument in open calls to guarantee that created files have the proper protection. * login/programs/utmpd.c (main): Remove files created by a previous `bind' before creating sockets. Suggested by a sun . 1997-07-29 Andreas Jaeger * math/libm-test.c: Remove unneeded function check_int_exec. * BUGS: Correct typos. * gmon/gmon.c: Add alias for monstartup, declare _strerror_internal. 1997-07-30 Andreas Jaeger * manual/socket.texi (Host Address Functions): Reformat inet_ntop entry to confirm with expected behaviour of some scripts. * libc.map: Add functions/variables in global namespace, remove wildcards. 1997-07-29 Andreas Jaeger * resolv/libresolv.map: Add variables and routines used by named, nslookup and other bind utils. * libc.map: Likewise. 1997-07-31 00:35 Philip Blundell * sysdeps/unix/sysv/linux/if_index.c: Rewrite to avoid using /proc filesystem. * inet/test_ifindex.c: New file. * inet/Makefile (tests): Add test_ifindex. 1997-08-01 04:25 Ulrich Drepper * nis/nss_nisplus/nisplus-parser.c: Fix another bug in the parser. Patch by Thorsten Kukuk . * manual/errno.texi: Fix typo. Reported by Erik Talvola . (write_hist): Remove dependency on 32 bit int. --- sysdeps/unix/sysv/linux/if_index.c | 217 ++++++++++++++++++++++--------------- 1 file changed, 127 insertions(+), 90 deletions(-) (limited to 'sysdeps/unix/sysv/linux/if_index.c') diff --git a/sysdeps/unix/sysv/linux/if_index.c b/sysdeps/unix/sysv/linux/if_index.c index fc3bd3324f..41bd0535c9 100644 --- a/sysdeps/unix/sysv/linux/if_index.c +++ b/sysdeps/unix/sysv/linux/if_index.c @@ -20,121 +20,158 @@ #include #include #include +#include +#include +#include -#define IF_INET6_FILENAME "/proc/net/if_inet6" - -/* /proc/net/if_inet6 contains lines that look like this: - * - * fe8000000000000000000000836fc168 0b 00 20 80 sit7 - * - * | | | | | | - * address --' | | | | | - * index --------' | | | | - * prefix length ---' | | | - * scope --------------' | | - * flags -----------------' | - * name -------------------------' - * - */ - -static int get_one_interface(FILE *fd, char *interface, int iflen, unsigned int *index) +/* Try to get a socket to talk to the kernel. */ +static int +opensock (void) { - char buffer[80]; - static char seps[] = " \012"; - char *c = buffer; - char *sp; - if (!fgets(buffer, 80, fd)) - return 1; - if (strtok_r(buffer, seps, &sp) == NULL) return 1; - if (c = strtok_r(NULL, seps, &sp), c == NULL) return 1; - *index = strtoul(c, NULL, 16); - if (strtok_r(NULL, seps, &sp) == NULL) return 1; - if (strtok_r(NULL, seps, &sp) == NULL) return 1; - if (strtok_r(NULL, seps, &sp) == NULL) return 1; - if (c = strtok_r(NULL, seps, &sp), c == NULL) return 1; - strncpy(interface, c, iflen); - return 0; -} + /* Cache the last AF that worked, to avoid many redundant calls to + socket(). */ + static int sock_af = -1; + int fd = -1; + __libc_lock_define_initialized (static, lock); -unsigned int if_nametoindex(const char *ifname) -{ - FILE *fd = fopen(IF_INET6_FILENAME, "r"); - char this_ifname[IFNAMSIZ]; - unsigned int this_index; - if (!fd) return 0; - while (get_one_interface(fd, this_ifname, IFNAMSIZ, &this_index) == 0) { - if (!strcmp(this_ifname, ifname)) { - fclose(fd); - return this_index; + if (sock_af != -1) + { + fd = socket (sock_af, SOCK_DGRAM, 0); + if (fd != -1) + return fd; + } + + __libc_lock_lock (lock); + + if (sock_af != -1) + fd = socket (sock_af, SOCK_DGRAM, 0); + + if (fd == -1) + { + fd = socket (sock_af = AF_INET6, SOCK_DGRAM, 0); + if (fd < 0) + fd = socket (sock_af = AF_INET, SOCK_DGRAM, 0); + if (fd < 0) + fd = socket (sock_af = AF_IPX, SOCK_DGRAM, 0); + if (fd < 0) + fd = socket (sock_af = AF_AX25, SOCK_DGRAM, 0); + if (fd < 0) + fd = socket (sock_af = AF_APPLETALK, SOCK_DGRAM, 0); } - } - fclose(fd); - return 0; + + __libc_lock_unlock (lock); + return fd; } -char *if_indextoname(unsigned int ifindex, char *ifname) +unsigned int +if_nametoindex (const char *ifname) { - FILE *fd = fopen(IF_INET6_FILENAME, "r"); - unsigned int this_index; - if (!fd) return NULL; - while (get_one_interface(fd, ifname, IFNAMSIZ, &this_index) == 0) { - if (this_index == ifindex) { - fclose(fd); - return ifname; + struct ifreq ifr; + int fd = opensock (); + + if (fd < 0) + return 0; + + strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); + if (ioctl (fd, SIOGIFINDEX, &ifr) < 0) + { + close (fd); + return 0; } - } - fclose(fd); - return NULL; + close (fd); + return ifr.ifr_ifindex; } -void if_freenameindex(struct if_nameindex *ifn) +void +if_freenameindex (struct if_nameindex *ifn) { struct if_nameindex *ptr = ifn; while (ptr->if_name || ptr->if_index) { if (ptr->if_name) - free(ptr->if_name); - ptr++; + free (ptr->if_name); + ++ptr; } - free(ifn); + free (ifn); } -struct if_nameindex *if_nameindex(void) +struct if_nameindex * +if_nameindex (void) { - FILE *fd = fopen(IF_INET6_FILENAME, "r"); - struct if_nameindex *ifn = NULL; - int nifs = 0; - if (!fd) return NULL; + int fd = opensock (); + struct ifconf ifc; + unsigned int rq_ifs = 4, nifs, i; + struct if_nameindex *idx = NULL; + + if (fd < 0) + return NULL; + + ifc.ifc_buf = NULL; + + /* Read all the interfaces out of the kernel. */ do { - struct if_nameindex *newifn; - nifs++; - newifn = realloc(ifn, nifs*sizeof(struct if_nameindex)); - if (!newifn) + rq_ifs *= 2; + ifc.ifc_len = rq_ifs * sizeof (struct ifreq); + ifc.ifc_buf = realloc (ifc.ifc_buf, ifc.ifc_len); + if (ifc.ifc_buf == NULL) { - /* We ran out of memory. */ - if (--nifs) - { - free(ifn[nifs-1].if_name); - ifn[nifs-1].if_name = 0; - ifn[nifs-1].if_index = 0; - if_freenameindex(ifn); - } + close(fd); return NULL; } - ifn = newifn; - ifn[nifs-1].if_index = 0; - ifn[nifs-1].if_name = malloc(IFNAMSIZ); - if (ifn[nifs-1].if_name == NULL) + if (ioctl (fd, SIOCGIFCONF, &ifc) < 0) + goto jump; + } + while ((unsigned int) ifc.ifc_len == (rq_ifs * sizeof (struct ifreq))); + + nifs = ifc.ifc_len / sizeof (struct ifreq); + ifc.ifc_buf = realloc (ifc.ifc_buf, ifc.ifc_len); + + idx = malloc ((nifs+1) * sizeof (struct if_nameindex)); + if (idx == NULL) + goto jump; + + for (i = 0; i < nifs; ++i) + { + struct ifreq *ifr = &ifc.ifc_req[i]; + if ((idx[i].if_name = malloc (strlen (ifr->ifr_name)+1)) == NULL) { - if_freenameindex(ifn); - return NULL; + free (idx); + idx = NULL; + goto jump; + } + strcpy (idx[i].if_name, ifr->ifr_name); + if (ioctl (fd, SIOGIFINDEX, ifr) < 0) + { + free (idx); + idx = NULL; + goto jump; } + idx[i].if_index = ifr->ifr_ifindex; } - while (get_one_interface(fd, ifn[nifs-1].if_name, IFNAMSIZ, - &ifn[nifs-1].if_index) == 0); - free(ifn[nifs-1].if_name); - ifn[nifs-1].if_name = NULL; - fclose(fd); - return ifn; + idx[i].if_index = 0; + idx[i].if_name = NULL; + +jump: + free (ifc.ifc_buf); + close (fd); + return idx; +} + +char * +if_indextoname (unsigned int ifindex, char *ifname) +{ + struct if_nameindex *idx = if_nameindex (); + struct if_nameindex *p; + + for (p = idx; p->if_index || p->if_name; ++p) + if (p->if_index == ifindex) + { + strncpy (ifname, p->if_name, IFNAMSIZ); + if_freenameindex (idx); + return ifname; + } + + if_freenameindex (idx); + return NULL; } -- cgit 1.4.1