diff options
Diffstat (limited to 'usr.sbin/ppp/iface.c')
| -rw-r--r-- | usr.sbin/ppp/iface.c | 481 |
1 files changed, 0 insertions, 481 deletions
diff --git a/usr.sbin/ppp/iface.c b/usr.sbin/ppp/iface.c deleted file mode 100644 index bca10ee0c3c6..000000000000 --- a/usr.sbin/ppp/iface.c +++ /dev/null @@ -1,481 +0,0 @@ -/*- - * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $Id: iface.c,v 1.1 1998/10/22 02:32:49 brian Exp $ - */ - -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <net/if.h> -#include <net/if_dl.h> -#include <net/route.h> -#include <arpa/inet.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <sys/un.h> - -#include <sys/errno.h> -#include <sys/ioctl.h> -#include <sys/sysctl.h> -#include <string.h> -#include <stdio.h> -#include <stdlib.h> -#include <termios.h> -#include <unistd.h> - -#include "defs.h" -#include "command.h" -#include "mbuf.h" -#include "log.h" -#include "id.h" -#include "timer.h" -#include "fsm.h" -#include "iplist.h" -#include "lqr.h" -#include "hdlc.h" -#include "throughput.h" -#include "slcompress.h" -#include "filter.h" -#include "descriptor.h" -#include "ipcp.h" -#include "lcp.h" -#include "ccp.h" -#include "link.h" -#include "mp.h" -#include "bundle.h" -#include "prompt.h" -#include "iface.h" - - -static int -bitsinmask(struct in_addr mask) -{ - u_int32_t bitmask, maskaddr; - int bits; - - bitmask = 0xffffffff; - maskaddr = ntohl(mask.s_addr); - for (bits = 32; bits >= 0; bits--) { - if (maskaddr == bitmask) - break; - bitmask &= ~(1 << (32 - bits)); - } - - return bits; -} - -struct iface * -iface_Create(const char *name) -{ - int mib[6], i, s; - size_t needed; - char *buf, *ptr, *end, *cp, *lim; - struct if_msghdr *ifm; - struct ifa_msghdr *ifam; - struct sockaddr_dl *dl; - struct rt_addrinfo rti; - struct iface *iface; - struct iface_addr *addr; - - s = socket(AF_INET, SOCK_DGRAM, 0); - if (s < 0) { - fprintf(stderr, "iface_Create: socket(): %s\n", strerror(errno)); - return NULL; - } - - mib[0] = CTL_NET; - mib[1] = PF_ROUTE; - mib[2] = 0; - mib[3] = 0; - mib[4] = NET_RT_IFLIST; - mib[5] = 0; - - if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { - fprintf(stderr, "clean: sysctl: estimate: %s\n", - strerror(errno)); - close(s); - return NULL; - } - - if ((buf = (char *)malloc(needed)) == NULL) { - close(s); - return NULL; - } - - if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { - free(buf); - close(s); - return NULL; - } - - ptr = buf; - end = buf + needed; - iface = NULL; - - while (ptr < end && iface == NULL) { - ifm = (struct if_msghdr *)ptr; /* On if_msghdr */ - if (ifm->ifm_type != RTM_IFINFO) - break; - dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */ - if (!strncmp(name, dl->sdl_data, dl->sdl_nlen)) { - iface = (struct iface *)malloc(sizeof *iface); - if (iface == NULL) { - fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno)); - return NULL; - } - iface->name = strdup(name); - iface->flags = ifm->ifm_flags; - iface->index = ifm->ifm_index; - iface->in_addrs = 0; - iface->in_addr = NULL; - } - ptr += ifm->ifm_msglen; /* First ifa_msghdr */ - for (; ptr < end; ptr += ifam->ifam_msglen) { - ifam = (struct ifa_msghdr *)ptr; /* Next if address */ - - if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */ - break; - - if (iface == NULL) /* Keep wading */ - continue; - - /* Found an address ! */ - - if (ifam->ifam_addrs & (1 << RTAX_IFA)) { - /* *And* it's configured ! */ - rti.rti_addrs = ifam->ifam_addrs; - lim = (char *)ifam + ifam->ifam_msglen; - cp = (char *)(ifam + 1); - memset(rti.rti_info, '\0', sizeof(rti.rti_info)); - for (i = 0; i < RTAX_MAX && cp < lim; i++) { - if ((rti.rti_addrs & (1 << i)) == 0) - continue; - rti.rti_info[i] = (struct sockaddr *)cp; -#define ROUNDUP(x) \ - ((x) > 0 ? (1 + (((x) - 1) | (sizeof(long) - 1))) : sizeof(long)) - cp += ROUNDUP(rti.rti_info[i]->sa_len); - } - - if (rti.rti_info[RTAX_IFA] && - rti.rti_info[RTAX_IFA]->sa_family == AF_INET) { - /* Record the iface address rti */ - - addr = (struct iface_addr *)realloc - (iface->in_addr, (iface->in_addrs + 1) * sizeof iface->in_addr[0]); - if (addr == NULL) - break; - iface->in_addr = addr; - - addr += iface->in_addrs; - iface->in_addrs++; - - addr->ifa.s_addr = ((struct sockaddr_in *)rti.rti_info[RTAX_IFA])-> - sin_addr.s_addr; - addr->brd.s_addr = rti.rti_info[RTAX_BRD] ? - ((struct sockaddr_in *)rti.rti_info[RTAX_BRD])->sin_addr.s_addr : - INADDR_ANY; - addr->mask.s_addr = rti.rti_info[RTAX_NETMASK] ? - ((struct sockaddr_in *)rti.rti_info[RTAX_NETMASK])->sin_addr.s_addr: - INADDR_ANY; - - addr->bits = bitsinmask(addr->mask); - } - } - } - } - - free(buf); - close(s); - - return iface; -} - -static void -iface_addr_Zap(const char *name, struct iface_addr *addr) -{ - struct ifaliasreq ifra; - struct sockaddr_in *me, *peer; - int s; - - s = ID0socket(AF_INET, SOCK_DGRAM, 0); - if (s < 0) - log_Printf(LogERROR, "iface_addr_Zap: socket(): %s\n", strerror(errno)); - else { - memset(&ifra, '\0', sizeof ifra); - strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1); - me = (struct sockaddr_in *)&ifra.ifra_addr; - peer = (struct sockaddr_in *)&ifra.ifra_broadaddr; - me->sin_family = peer->sin_family = AF_INET; - me->sin_len = peer->sin_len = sizeof(struct sockaddr_in); - me->sin_addr = addr->ifa; - peer->sin_addr = addr->brd; - log_Printf(LogDEBUG, "Delete %s\n", inet_ntoa(addr->ifa)); - if (ID0ioctl(s, SIOCDIFADDR, &ifra) < 0) - log_Printf(LogWARN, "iface_addr_Zap: ioctl(SIOCDIFADDR, %s): %s\n", - inet_ntoa(addr->ifa), strerror(errno)); - close(s); - } -} - -void -iface_inClear(struct iface *iface, int how) -{ - int n, addrs; - - addrs = n = how == IFACE_CLEAR_ALL ? 0 : 1; - for (; n < iface->in_addrs; n++) - iface_addr_Zap(iface->name, iface->in_addr + n); - - iface->in_addrs = addrs; - /* Don't bother realloc()ing - we have little to gain */ -} - -int -iface_inAdd(struct iface *iface, struct in_addr ifa, struct in_addr mask, - struct in_addr brd, int how) -{ - int slot, s, chg; - struct ifaliasreq ifra; - struct sockaddr_in *me, *peer, *msk; - struct iface_addr *addr; - - for (slot = 0; slot < iface->in_addrs; slot++) - if (iface->in_addr[slot].ifa.s_addr == ifa.s_addr) { - if (how & IFACE_FORCE_ADD) - break; - else - /* errno = EEXIST; */ - return 0; - } - - addr = (struct iface_addr *)realloc - (iface->in_addr, (iface->in_addrs + 1) * sizeof iface->in_addr[0]); - if (addr == NULL) { - log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno)); - return 0; - } - iface->in_addr = addr; - - s = ID0socket(AF_INET, SOCK_DGRAM, 0); - if (s < 0) { - log_Printf(LogERROR, "iface_inAdd: socket(): %s\n", strerror(errno)); - return 0; - } - - /* - * We've gotta be careful here. If we try to add an address with the - * same destination as an existing interface, nothing will work. - * Instead, we tweak all previous address entries that match the - * to-be-added destination to 255.255.255.255 (w/ a similar netmask). - * There *may* be more than one - if the user has ``iface add''ed - * stuff previously. - */ - for (chg = 0; chg < iface->in_addrs; chg++) { - if ((iface->in_addr[chg].brd.s_addr == brd.s_addr && - brd.s_addr != INADDR_BROADCAST) || chg == slot) { - memset(&ifra, '\0', sizeof ifra); - strncpy(ifra.ifra_name, iface->name, sizeof ifra.ifra_name - 1); - me = (struct sockaddr_in *)&ifra.ifra_addr; - msk = (struct sockaddr_in *)&ifra.ifra_mask; - peer = (struct sockaddr_in *)&ifra.ifra_broadaddr; - me->sin_family = msk->sin_family = peer->sin_family = AF_INET; - me->sin_len = msk->sin_len = peer->sin_len = sizeof(struct sockaddr_in); - me->sin_addr = iface->in_addr[chg].ifa; - msk->sin_addr = iface->in_addr[chg].mask; - peer->sin_addr = iface->in_addr[chg].brd; - log_Printf(LogDEBUG, "Delete %s\n", inet_ntoa(me->sin_addr)); - ID0ioctl(s, SIOCDIFADDR, &ifra); /* Don't care if it fails... */ - if (chg != slot) { - peer->sin_addr.s_addr = iface->in_addr[chg].brd.s_addr = - msk->sin_addr.s_addr = iface->in_addr[chg].mask.s_addr = - INADDR_BROADCAST; - iface->in_addr[chg].bits = 32; - log_Printf(LogDEBUG, "Add %s -> 255.255.255.255\n", - inet_ntoa(me->sin_addr)); - if (ID0ioctl(s, SIOCAIFADDR, &ifra) < 0 && errno != EEXIST) { - /* Oops - that's bad(ish) news ! We've lost an alias ! */ - log_Printf(LogERROR, "iface_inAdd: ioctl(SIOCAIFADDR): %s: %s\n", - inet_ntoa(me->sin_addr), strerror(errno)); - iface->in_addrs--; - bcopy(iface->in_addr + chg + 1, iface->in_addr + chg, - (iface->in_addrs - chg) * sizeof iface->in_addr[0]); - if (slot > chg) - slot--; - chg--; - } - } - } - } - - memset(&ifra, '\0', sizeof ifra); - strncpy(ifra.ifra_name, iface->name, sizeof ifra.ifra_name - 1); - me = (struct sockaddr_in *)&ifra.ifra_addr; - msk = (struct sockaddr_in *)&ifra.ifra_mask; - peer = (struct sockaddr_in *)&ifra.ifra_broadaddr; - me->sin_family = msk->sin_family = peer->sin_family = AF_INET; - me->sin_len = msk->sin_len = peer->sin_len = sizeof(struct sockaddr_in); - me->sin_addr = ifa; - msk->sin_addr = mask; - peer->sin_addr = brd; - - if (log_IsKept(LogDEBUG)) { - char buf[16]; - - strncpy(buf, inet_ntoa(brd), sizeof buf-1); - buf[sizeof buf - 1] = '\0'; - log_Printf(LogDEBUG, "Add %s -> %s\n", inet_ntoa(ifa), buf); - } - - /* An EEXIST failure w/ brd == INADDR_BROADCAST is ok (and works!) */ - if (ID0ioctl(s, SIOCAIFADDR, &ifra) < 0 && - (brd.s_addr != INADDR_BROADCAST || errno != EEXIST)) { - log_Printf(LogERROR, "iface_inAdd: ioctl(SIOCAIFADDR): %s: %s\n", - inet_ntoa(ifa), strerror(errno)); - ID0ioctl(s, SIOCDIFADDR, &ifra); /* EEXIST ? */ - close(s); - return 0; - } - close(s); - - if (slot == iface->in_addrs) { - /* We're adding a new interface address */ - - if (how & IFACE_ADD_FIRST) { - /* Stuff it at the start of our list */ - slot = 0; - bcopy(iface->in_addr, iface->in_addr + 1, - iface->in_addrs * sizeof iface->in_addr[0]); - } - - iface->in_addrs++; - } else if (how & IFACE_ADD_FIRST) { - /* Shift it up to the first slot */ - bcopy(iface->in_addr, iface->in_addr + 1, slot * sizeof iface->in_addr[0]); - slot = 0; - } - - iface->in_addr[slot].ifa = ifa; - iface->in_addr[slot].mask = mask; - iface->in_addr[slot].brd = brd; - iface->in_addr[slot].bits = bitsinmask(iface->in_addr[slot].mask); - - return 1; -} - -int -iface_inDelete(struct iface *iface, struct in_addr ip) -{ - int n; - - for (n = 0; n < iface->in_addrs; n++) - if (iface->in_addr[n].ifa.s_addr == ip.s_addr) { - iface_addr_Zap(iface->name, iface->in_addr + n); - bcopy(iface->in_addr + n + 1, iface->in_addr + n, - (iface->in_addrs - n - 1) * sizeof iface->in_addr[0]); - iface->in_addrs--; - return 1; - } - - return 0; -} - -void -iface_Destroy(struct iface *iface) -{ - /* - * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually - * if that's what the user wants. It's better to leave the interface - * allocated so that existing connections can continue to work. - */ - - if (iface != NULL) { - free(iface->name); - free(iface->in_addr); - free(iface); - } -} - -#define if_entry(x) { IFF_##x, #x } - -struct { - int flag; - const char *value; -} if_flags[] = { - if_entry(UP), - if_entry(BROADCAST), - if_entry(DEBUG), - if_entry(LOOPBACK), - if_entry(POINTOPOINT), - if_entry(RUNNING), - if_entry(NOARP), - if_entry(PROMISC), - if_entry(ALLMULTI), - if_entry(OACTIVE), - if_entry(SIMPLEX), - if_entry(LINK0), - if_entry(LINK1), - if_entry(LINK2), - if_entry(MULTICAST), - { 0, "???" } -}; - -int -iface_Show(struct cmdargs const *arg) -{ - struct iface *iface = arg->bundle->iface, *current; - int f, flags; - - current = iface_Create(iface->name); - flags = iface->flags = current->flags; - iface_Destroy(current); - - prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index); - for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++) - if ((if_flags[f].flag & flags) || (!if_flags[f].flag && flags)) { - prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",", - if_flags[f].value); - flags &= ~if_flags[f].flag; - } - prompt_Printf(arg->prompt, "> has %d address%s:\n", iface->in_addrs, - iface->in_addrs == 1 ? "" : "es"); - - for (f = 0; f < iface->in_addrs; f++) { - prompt_Printf(arg->prompt, " %s", inet_ntoa(iface->in_addr[f].ifa)); - if (iface->in_addr[f].bits >= 0) - prompt_Printf(arg->prompt, "/%d", iface->in_addr[f].bits); - if (iface->flags & IFF_POINTOPOINT) - prompt_Printf(arg->prompt, " -> %s", inet_ntoa(iface->in_addr[f].brd)); - else if (iface->flags & IFF_BROADCAST) - prompt_Printf(arg->prompt, " broadcast %s", - inet_ntoa(iface->in_addr[f].brd)); - if (iface->in_addr[f].bits < 0) - prompt_Printf(arg->prompt, " (mask %s)", - inet_ntoa(iface->in_addr[f].mask)); - prompt_Printf(arg->prompt, "\n"); - } - - return 0; -} |