diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/generic/ifaddrs.c | 44 | ||||
| -rw-r--r-- | sysdeps/generic/ifreq.h | 18 | ||||
| -rw-r--r-- | sysdeps/gnu/ifaddrs.c | 147 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/ifreq.h | 74 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/ifreq.h | 21 |
5 files changed, 289 insertions, 15 deletions
diff --git a/sysdeps/generic/ifaddrs.c b/sysdeps/generic/ifaddrs.c new file mode 100644 index 0000000000..7b29aa111c --- /dev/null +++ b/sysdeps/generic/ifaddrs.c @@ -0,0 +1,44 @@ +/* getifaddrs -- get names and addresses of all network interfaces + Copyright (C) 2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <ifaddrs.h> +#include <errno.h> +#include <stdlib.h> + +/* Create a linked list of `struct ifaddrs' structures, one for each + network interface on the host machine. If successful, store the + list in *IFAP and return 0. On errors, return -1 and set `errno'. */ +int +getifaddrs (struct ifaddrs **ifap) +{ + __set_errno (ENOSYS); + return -1; +} +stub_warning (getifaddrs) + +void +freeifaddrs (struct ifaddrs *ifa) +{ + if (ifa == NULL) + return; /* a la free, why not? */ + + /* Can't be called properly if getifaddrs never succeeded. */ + abort (); +} +stub_warning (freeifaddrs) diff --git a/sysdeps/generic/ifreq.h b/sysdeps/generic/ifreq.h index 62f3dcfaf9..c96d1c8789 100644 --- a/sysdeps/generic/ifreq.h +++ b/sysdeps/generic/ifreq.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. +/* Copyright (C) 1999,2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>. @@ -26,15 +26,17 @@ static inline void -__ifreq (struct ifreq **ifreqs, int *num_ifs) +__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd) { - int fd = __opensock (); + int fd = sockfd; struct ifconf ifc; int rq_len; int nifs; # define RQ_IFS 4 if (fd < 0) + fd = __opensock (); + if (fd < 0) { *num_ifs = 0; *ifreqs = NULL; @@ -51,8 +53,9 @@ __ifreq (struct ifreq **ifreqs, int *num_ifs) { if (ifc.ifc_buf) free (ifc.ifc_buf); - - __close (fd); + + if (fd != sockfd) + __close (fd); *num_ifs = 0; *ifreqs = NULL; return; @@ -63,7 +66,8 @@ __ifreq (struct ifreq **ifreqs, int *num_ifs) nifs = ifc.ifc_len / sizeof (struct ifreq); - __close (fd); + if (fd != sockfd) + __close (fd); *num_ifs = nifs; *ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq)); @@ -71,7 +75,7 @@ __ifreq (struct ifreq **ifreqs, int *num_ifs) static inline void -__if_freereq (struct ifreq *ifreqs) +__if_freereq (struct ifreq *ifreqs, int num_ifs) { free (ifreqs); } diff --git a/sysdeps/gnu/ifaddrs.c b/sysdeps/gnu/ifaddrs.c new file mode 100644 index 0000000000..e0a5b424f0 --- /dev/null +++ b/sysdeps/gnu/ifaddrs.c @@ -0,0 +1,147 @@ +/* getifaddrs -- get names and addresses of all network interfaces + Copyright (C) 2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <ifaddrs.h> +#include <net/if.h> +#include <sys/socket.h> +#include <sys/ioctl.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <netinet/in.h> + +#include "ifreq.h" + +/* Create a linked list of `struct ifaddrs' structures, one for each + network interface on the host machine. If successful, store the + list in *IFAP and return 0. On errors, return -1 and set `errno'. */ +int +getifaddrs (struct ifaddrs **ifap) +{ + /* This implementation handles only IPv4 interfaces. + The various ioctls below will only work on an AF_INET socket. + Some different mechanism entirely must be used for IPv6. */ + int fd = __socket (AF_INET, SOCK_DGRAM, 0); + struct ifreq *ifreqs; + int nifs, i; + + if (fd < 0) + return -1; + + __ifreq (&ifreqs, &nifs, fd); + if (ifreqs == NULL) /* XXX doesn't distinguish error vs none */ + { + __close (fd); + return -1; + } + + /* Now we have the list of interfaces and each one's address. + Put it into the expected format and fill in the remaining details. */ + if (nifs == 0) + *ifap = NULL; + else + { + struct + { + struct ifaddrs ia; + struct sockaddr addr, netmask, broadaddr; + char name[IF_NAMESIZE]; + } *storage; + + storage = malloc (nifs * sizeof storage[0]); + if (storage == NULL) + { + __close (fd); + __if_freereq (ifreqs, nifs); + return -1; + } + + i = 0; + do + { + struct ifreq *const ifr = &ifreqs[i]; + + /* Fill in all pointers to the storage we've already allocated. */ + storage[i].ia.ifa_next = &storage[i + 1].ia; + storage[i].ia.ifa_addr = &storage[i].addr; + storage[i].ia.ifa_netmask = &storage[i].netmask; + storage[i].ia.ifa_broadaddr = &storage[i].broadaddr; /* & dstaddr */ + + /* Now copy the information we already have from SIOCGIFCONF. */ + storage[i].ia.ifa_name = strncpy (storage[i].name, ifr->ifr_name, + sizeof storage[i].name); + storage[i].addr = ifr->ifr_addr; + + /* The SIOCGIFCONF call filled in only the name and address. + Now we must also ask for the other information we need. */ + + if (__ioctl (fd, SIOCGIFFLAGS, ifr) < 0) + break; + storage[i].ia.ifa_flags = ifr->ifr_flags; + + ifr->ifr_addr = storage[i].addr; + if (__ioctl (fd, SIOCGIFNETMASK, ifr) < 0) + break; + storage[i].netmask = ifr->ifr_netmask; + + if (ifr->ifr_flags & IFF_BROADCAST) + { + ifr->ifr_addr = storage[i].addr; + if (__ioctl (fd, SIOCGIFBRDADDR, ifr) < 0) + break; + storage[i].broadaddr = ifr->ifr_broadaddr; + } + else if (ifr->ifr_flags & IFF_POINTOPOINT) + { + ifr->ifr_addr = storage[i].addr; + if (__ioctl (fd, SIOCGIFDSTADDR, ifr) < 0) + break; + storage[i].broadaddr = ifr->ifr_dstaddr; + } + else + /* Just 'cause. */ + memset (&storage[i].broadaddr, 0, sizeof storage[i].broadaddr); + + storage[i].ia.ifa_data = NULL; /* Nothing here for now. */ + + } while (++i < nifs); + if (i < nifs) /* Broke out early on error. */ + { + __close (fd); + free (storage); + __if_freereq (ifreqs, nifs); + return -1; + } + storage[i - 1].ia.ifa_next = NULL; + + *ifap = &storage[0].ia; + + __close (fd); + __if_freereq (ifreqs, nifs); + } + + return 0; +} + +void +freeifaddrs (struct ifaddrs *ifa) +{ + free (ifa); +} diff --git a/sysdeps/mach/hurd/ifreq.h b/sysdeps/mach/hurd/ifreq.h new file mode 100644 index 0000000000..737dee9285 --- /dev/null +++ b/sysdeps/mach/hurd/ifreq.h @@ -0,0 +1,74 @@ +/* Fetch the host's network interface list. Hurd version. + Copyright (C) 2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <net/if.h> +#include <hurd.h> +#include <hurd/pfinet.h> +#include <sys/socket.h> +#include <sys/mman.h> + + +static inline void +__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd) +{ + struct ifconf ifc; + file_t server; + + server = _hurd_socket_server (PF_INET, 0); + if (server == MACH_PORT_NULL) + { + out: + *num_ifs = 0; + *ifreqs = NULL; + } + else + { + char *data = NULL; + size_t len = 0; + error_t err = __pfinet_siocgifconf (server, -1, &data, &len); + if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED) + { + /* On the first use of the socket server during the operation, + allow for the old server port dying. */ + server = _hurd_socket_server (PF_INET, 1); + if (server == MACH_PORT_NULL) + goto out; + err = __pfinet_siocgifconf (server, -1, ifreqs, &len); + } + if (err) + goto out; + + if (len % sizeof (struct ifreq) != 0) + { + munmap (data, len); + errno = EGRATUITOUS; + goto out; + } + *num_ifs = len / sizeof (struct ifreq); + *ifreqs = (struct ifreq *) data; + } + +} + + +static inline void +__if_freereq (struct ifreq *ifreqs, int num_ifs) +{ + munmap (ifreqs, num_ifs * sizeof (struct ifreq)) +} diff --git a/sysdeps/unix/sysv/linux/ifreq.h b/sysdeps/unix/sysv/linux/ifreq.h index b38342534d..216c1f3373 100644 --- a/sysdeps/unix/sysv/linux/ifreq.h +++ b/sysdeps/unix/sysv/linux/ifreq.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. +/* Copyright (C) 1999,2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>. @@ -34,21 +34,23 @@ static int old_siocgifconf; static inline void -__ifreq (struct ifreq **ifreqs, int *num_ifs) +__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd) { - int fd = __opensock (); + int fd = sockfd; struct ifconf ifc; int rq_len; int nifs; # define RQ_IFS 4 if (fd < 0) + fd = __opensock (); + if (fd < 0) { *num_ifs = 0; *ifreqs = NULL; return; } - + ifc.ifc_buf = NULL; /* We may be able to get the needed buffer size directly, rather than @@ -79,8 +81,9 @@ __ifreq (struct ifreq **ifreqs, int *num_ifs) { if (ifc.ifc_buf) free (ifc.ifc_buf); - - __close (fd); + + if (fd != sockfd) + __close (fd); *num_ifs = 0; *ifreqs = NULL; @@ -91,14 +94,16 @@ __ifreq (struct ifreq **ifreqs, int *num_ifs) while (ifc.ifc_len == rq_len && old_siocgifconf); nifs = ifc.ifc_len / sizeof (struct ifreq); - __close (fd); + + if (fd != sockfd) + __close (fd); *num_ifs = nifs; *ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq)); } static inline void -__if_freereq (struct ifreq *ifreqs) +__if_freereq (struct ifreq *ifreqs, int num_ifs) { free (ifreqs); } |