diff options
Diffstat (limited to 'usr.sbin/ppp/ncpaddr.c')
| -rw-r--r-- | usr.sbin/ppp/ncpaddr.c | 1008 |
1 files changed, 1008 insertions, 0 deletions
diff --git a/usr.sbin/ppp/ncpaddr.c b/usr.sbin/ppp/ncpaddr.c new file mode 100644 index 000000000000..4cf36e2a23e6 --- /dev/null +++ b/usr.sbin/ppp/ncpaddr.c @@ -0,0 +1,1008 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2001 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. + */ + +#include <sys/types.h> +#include <sys/socket.h> +#ifdef __OpenBSD__ +#include <net/if_types.h> +#include <net/route.h> +#endif +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <arpa/inet.h> +#include <sys/un.h> + +#include <netdb.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <termios.h> + +#include "log.h" +#include "ncpaddr.h" +#include "timer.h" +#include "fsm.h" +#include "defs.h" +#include "slcompress.h" +#include "iplist.h" +#include "throughput.h" +#include "mbuf.h" +#include "ipcp.h" +#include "descriptor.h" +#include "layer.h" +#include "lqr.h" +#include "hdlc.h" +#include "lcp.h" +#include "ccp.h" +#include "link.h" +#include "mp.h" +#include "ipv6cp.h" +#include "ncp.h" + + +#define ncprange_ip4addr u.ip4.ipaddr +#define ncprange_ip4mask u.ip4.mask +#define ncprange_ip4width u.ip4.width +#define ncpaddr_ip4addr u.ip4addr +#ifndef NOINET6 +#define ncprange_ip6addr u.ip6.ipaddr +#define ncprange_ip6width u.ip6.width +#define ncpaddr_ip6addr u.ip6addr +#endif + +static struct in_addr +bits2mask4(int bits) +{ + struct in_addr result; + u_int32_t bit = 0x80000000; + + result.s_addr = 0; + + while (bits) { + result.s_addr |= bit; + bit >>= 1; + bits--; + } + + result.s_addr = htonl(result.s_addr); + return result; +} + +static int +mask42bits(struct in_addr mask) +{ + u_int32_t msk = ntohl(mask.s_addr); + u_int32_t tst; + int ret; + + for (ret = 32, tst = 1; tst; ret--, tst <<= 1) + if (msk & tst) + break; + + for (tst <<= 1; tst; tst <<= 1) + if (!(msk & tst)) + break; + + return tst ? -1 : ret; +} + +#ifndef NOINET6 +static struct in6_addr +bits2mask6(int bits) +{ + struct in6_addr result; + u_int32_t bit = 0x80; + u_char *c = result.s6_addr; + + memset(&result, '\0', sizeof result); + + while (bits) { + if (bit == 0) { + bit = 0x80; + c++; + } + *c |= bit; + bit >>= 1; + bits--; + } + + return result; +} + +static int +mask62bits(const struct in6_addr *mask) +{ + const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; + const u_char *c, *p, *end; + int masklen, m; + + p = (const u_char *)mask; + for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) + masklen += 8; + + if (p < end) { + for (c = masks, m = 0; c < masks + sizeof masks; c++, m++) + if (*c == *p) { + masklen += m; + break; + } + } + + return masklen; +} + +#if 0 +static void +adjust_linklocal(struct sockaddr_in6 *sin6) +{ + /* XXX: ?????!?!?!!!!! This is horrible ! */ + /* + * The kernel does not understand sin6_scope_id for routing at this moment. + * We should rather keep the embedded ID. + * jinmei@kame.net, 20011026 + */ + if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || + IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { + sin6->sin6_scope_id = + ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); + *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; + } +} +#endif +#endif + +void +ncpaddr_init(struct ncpaddr *addr) +{ + addr->ncpaddr_family = AF_UNSPEC; +} + +int +ncpaddr_isset(const struct ncpaddr *addr) +{ + return addr->ncpaddr_family != AF_UNSPEC; +} + +int +ncpaddr_isdefault(const struct ncpaddr *addr) +{ + switch (addr->ncpaddr_family) { + case AF_INET: + if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) + return 1; + break; + +#ifndef NOINET6 + case AF_INET6: + if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) + return 1; + break; +#endif + } + + return 0; +} + +int +ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) +{ + if (addr->ncpaddr_family != cmp->ncpaddr_family) + return 0; + + switch (addr->ncpaddr_family) { + case AF_INET: + return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; + +#ifndef NOINET6 + case AF_INET6: + return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, + sizeof addr->ncpaddr_ip6addr); +#endif + + case AF_UNSPEC: + return 1; + } + + return 0; +} + +void +ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) +{ + switch (from->ncpaddr_family) { + case AF_INET: + addr->ncpaddr_family = AF_INET; + addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; + break; +#ifndef NOINET6 + case AF_INET6: + addr->ncpaddr_family = AF_INET6; + addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; + break; +#endif + default: + addr->ncpaddr_family = AF_UNSPEC; + } +} + +void +ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) +{ + addr->ncpaddr_family = AF_INET; + addr->ncpaddr_ip4addr.s_addr = ip; +} + +int +ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) +{ + if (addr->ncpaddr_family != AF_INET) + return 0; + *ip = addr->ncpaddr_ip4addr.s_addr; + return 1; +} + +void +ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) +{ + addr->ncpaddr_family = AF_INET; + addr->ncpaddr_ip4addr = ip; +} + +int +ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) +{ + if (addr->ncpaddr_family != AF_INET) + return 0; + *ip = addr->ncpaddr_ip4addr; + return 1; +} + +#ifndef NOINET6 +void +ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) +{ + addr->ncpaddr_family = AF_INET6; + addr->ncpaddr_ip6addr = *ip6; +} + +int +ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) +{ + if (addr->ncpaddr_family != AF_INET6) + return 0; + *ip6 = addr->ncpaddr_ip6addr; + return 1; +} +#endif + +void +ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) +{ + struct sockaddr_in *host4 = (struct sockaddr_in *)host; +#ifndef NOINET6 + struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; +#endif + + memset(host, '\0', sizeof(*host)); + + switch (addr->ncpaddr_family) { + case AF_INET: + host4->sin_family = AF_INET; + host4->sin_len = sizeof(*host4); + host4->sin_addr = addr->ncpaddr_ip4addr; + break; + +#ifndef NOINET6 + case AF_INET6: + host6->sin6_family = AF_INET6; + host6->sin6_len = sizeof(*host6); + host6->sin6_addr = addr->ncpaddr_ip6addr; + break; +#endif + + default: + host->ss_family = AF_UNSPEC; + break; + } +} + +void +ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) +{ + const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; +#ifndef NOINET6 + const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; +#endif + + switch (host->sa_family) { + case AF_INET: + addr->ncpaddr_family = AF_INET; + addr->ncpaddr_ip4addr = host4->sin_addr; + break; + +#ifndef NOINET6 + case AF_INET6: + if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { + addr->ncpaddr_family = AF_INET; + addr->ncpaddr_ip4addr.s_addr = + *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); + } else { + addr->ncpaddr_family = AF_INET6; + addr->ncpaddr_ip6addr = host6->sin6_addr; + } + break; +#endif + + default: + addr->ncpaddr_family = AF_UNSPEC; + } +} + +static char * +ncpaddr_ntowa(const struct ncpaddr *addr) +{ + static char res[NCP_ASCIIBUFFERSIZE]; +#ifndef NOINET6 + struct sockaddr_in6 sin6; +#endif + + switch (addr->ncpaddr_family) { + case AF_INET: + snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); + return res; + +#ifndef NOINET6 + case AF_INET6: + memset(&sin6, '\0', sizeof(sin6)); + sin6.sin6_len = sizeof(sin6); + sin6.sin6_family = AF_INET6; + sin6.sin6_addr = addr->ncpaddr_ip6addr; +#if 0 + adjust_linklocal(&sin6); +#endif + if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), + NULL, 0, NI_NUMERICHOST) != 0) + break; + + return res; +#endif + } + + snprintf(res, sizeof res, "<AF_UNSPEC>"); + return res; +} + +const char * +ncpaddr_ntoa(const struct ncpaddr *addr) +{ + return ncpaddr_ntowa(addr); +} + + +int +ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) +{ + struct ncprange range; + + if (!ncprange_aton(&range, ncp, data)) + return 0; + + if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32 && + range.ncprange_ip4addr.s_addr != INADDR_ANY) { + log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); + return 0; + } + +#ifndef NOINET6 + if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128 && + !IN6_IS_ADDR_UNSPECIFIED(&range.ncprange_ip6addr)) { + log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); + return 0; + } +#endif + + switch (range.ncprange_family) { + case AF_INET: + addr->ncpaddr_family = range.ncprange_family; + addr->ncpaddr_ip4addr = range.ncprange_ip4addr; + return 1; + +#ifndef NOINET6 + case AF_INET6: + addr->ncpaddr_family = range.ncprange_family; + addr->ncpaddr_ip6addr = range.ncprange_ip6addr; + return 1; +#endif + } + + return 0; +} + +void +ncprange_init(struct ncprange *range) +{ + range->ncprange_family = AF_UNSPEC; +} + +int +ncprange_isset(const struct ncprange *range) +{ + return range->ncprange_family != AF_UNSPEC; +} + +int +ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) +{ + if (range->ncprange_family != cmp->ncprange_family) + return 0; + + switch (range->ncprange_family) { + case AF_INET: + if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) + return 0; + return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; + +#ifndef NOINET6 + case AF_INET6: + if (range->ncprange_ip6width != cmp->ncprange_ip6width) + return 0; + return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, + sizeof range->ncprange_ip6addr); +#endif + + case AF_UNSPEC: + return 1; + } + + return 0; +} + +int +ncprange_isdefault(const struct ncprange *range) +{ + switch (range->ncprange_family) { + case AF_INET: + if (range->ncprange_ip4addr.s_addr == INADDR_ANY) + return 1; + break; + +#ifndef NOINET6 + case AF_INET6: + if (range->ncprange_ip6width == 0 && + IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) + return 1; + break; +#endif + } + + return 0; +} + +void +ncprange_setdefault(struct ncprange *range, int af) +{ + memset(range, '\0', sizeof *range); + range->ncprange_family = af; +} + +int +ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) +{ +#ifndef NOINET6 + const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; + const u_char *addrp, *rangep; + int bits; +#endif + + if (range->ncprange_family != addr->ncpaddr_family) + return 0; + + switch (range->ncprange_family) { + case AF_INET: + return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & + range->ncprange_ip4mask.s_addr); + +#ifndef NOINET6 + case AF_INET6: + rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; + addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; + + for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) + if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) + return 0; + + return 1; +#endif + } + + return 0; +} + +int +ncprange_containsip4(const struct ncprange *range, struct in_addr addr) +{ + switch (range->ncprange_family) { + case AF_INET: + return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & + range->ncprange_ip4mask.s_addr); + } + + return 0; +} + +void +ncprange_copy(struct ncprange *range, const struct ncprange *from) +{ + switch (from->ncprange_family) { + case AF_INET: + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = from->ncprange_ip4addr; + range->ncprange_ip4mask = from->ncprange_ip4mask; + range->ncprange_ip4width = from->ncprange_ip4width; + break; + +#ifndef NOINET6 + case AF_INET6: + range->ncprange_family = AF_INET6; + range->ncprange_ip6addr = from->ncprange_ip6addr; + range->ncprange_ip6width = from->ncprange_ip6width; + break; +#endif + + default: + range->ncprange_family = AF_UNSPEC; + } +} + +void +ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) +{ + ncprange_sethost(range, addr); + ncprange_setwidth(range, width); +} + +void +ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) +{ + switch (from->ncpaddr_family) { + case AF_INET: + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = from->ncpaddr_ip4addr; + if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { + range->ncprange_ip4mask.s_addr = INADDR_ANY; + range->ncprange_ip4width = 0; + } else { + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + } + break; + +#ifndef NOINET6 + case AF_INET6: + range->ncprange_family = AF_INET6; + range->ncprange_ip6addr = from->ncpaddr_ip6addr; + range->ncprange_ip6width = 128; + break; +#endif + + default: + range->ncprange_family = AF_UNSPEC; + } +} + +int +ncprange_ishost(const struct ncprange *range) +{ + switch (range->ncprange_family) { + case AF_INET: + return range->ncprange_ip4width == 32; +#ifndef NOINET6 + case AF_INET6: + return range->ncprange_ip6width == 128; +#endif + } + + return (0); +} + +int +ncprange_setwidth(struct ncprange *range, int width) +{ + switch (range->ncprange_family) { + case AF_INET: + if (width < 0 || width > 32) + break; + range->ncprange_ip4width = width; + range->ncprange_ip4mask = bits2mask4(width); + break; + +#ifndef NOINET6 + case AF_INET6: + if (width < 0 || width > 128) + break; + range->ncprange_ip6width = width; + break; +#endif + + case AF_UNSPEC: + return 1; + } + + return 0; +} + +void +ncprange_setip4host(struct ncprange *range, struct in_addr from) +{ + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = from; + if (from.s_addr == INADDR_ANY) { + range->ncprange_ip4mask.s_addr = INADDR_ANY; + range->ncprange_ip4width = 0; + } else { + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + } +} + +void +ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) +{ + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = from; + range->ncprange_ip4mask = msk; + range->ncprange_ip4width = mask42bits(msk); +} + + +int +ncprange_setip4mask(struct ncprange *range, struct in_addr mask) +{ + if (range->ncprange_family != AF_INET) + return 0; + range->ncprange_ip4mask = mask; + range->ncprange_ip4width = mask42bits(mask); + return 1; +} + +void +ncprange_setsa(struct ncprange *range, const struct sockaddr *host, + const struct sockaddr *mask) +{ + const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; + const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; +#ifndef NOINET6 + const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; + const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; +#endif + + switch (host->sa_family) { + case AF_INET: + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = host4->sin_addr; + if (host4->sin_addr.s_addr == INADDR_ANY) { + range->ncprange_ip4mask.s_addr = INADDR_ANY; + range->ncprange_ip4width = 0; + } else if (mask4 && mask4->sin_family == AF_INET) { + range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; + range->ncprange_ip4width = mask42bits(mask4->sin_addr); + } else { + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + } + break; + +#ifndef NOINET6 + case AF_INET6: + range->ncprange_family = AF_INET6; + range->ncprange_ip6addr = host6->sin6_addr; + if (IN6_IS_ADDR_UNSPECIFIED(&host6->sin6_addr)) + range->ncprange_ip6width = 0; + else + range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; + break; +#endif + + default: + range->ncprange_family = AF_UNSPEC; + } +} + +void +ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, + struct sockaddr_storage *mask) +{ + struct sockaddr_in *host4 = (struct sockaddr_in *)host; + struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; +#ifndef NOINET6 + struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; + struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; +#endif + + memset(host, '\0', sizeof(*host)); + if (mask) + memset(mask, '\0', sizeof(*mask)); + + switch (range->ncprange_family) { + case AF_INET: + host4->sin_family = AF_INET; + host4->sin_len = sizeof(*host4); + host4->sin_addr = range->ncprange_ip4addr; + if (mask4) { + mask4->sin_family = AF_INET; + mask4->sin_len = sizeof(*host4); + mask4->sin_addr = range->ncprange_ip4mask; + } + break; + +#ifndef NOINET6 + case AF_INET6: + host6->sin6_family = AF_INET6; + host6->sin6_len = sizeof(*host6); + host6->sin6_addr = range->ncprange_ip6addr; + if (mask6) { + mask6->sin6_family = AF_INET6; + mask6->sin6_len = sizeof(*host6); + mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); + } + break; +#endif + + default: + host->ss_family = AF_UNSPEC; + if (mask) + mask->ss_family = AF_UNSPEC; + break; + } +} + +int +ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) +{ + switch (range->ncprange_family) { + case AF_INET: + addr->ncpaddr_family = AF_INET; + addr->ncpaddr_ip4addr = range->ncprange_ip4addr; + return 1; +#ifndef NOINET6 + case AF_INET6: + addr->ncpaddr_family = AF_INET6; + addr->ncpaddr_ip6addr = range->ncprange_ip6addr; + return 1; +#endif + } + + return 0; +} + +int +ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) +{ + if (range->ncprange_family != AF_INET) + return 0; + + *addr = range->ncprange_ip4addr; + return 1; +} + +int +ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) +{ + switch (range->ncprange_family) { + case AF_INET: + *mask = range->ncprange_ip4mask; + return 1; + } + + return 0; +} + +int +ncprange_getwidth(const struct ncprange *range, int *width) +{ + switch (range->ncprange_family) { + case AF_INET: + *width = range->ncprange_ip4width; + return 1; +#ifndef NOINET6 + case AF_INET6: + *width = range->ncprange_ip6width; + return 1; +#endif + } + + return 0; +} + +const char * +ncprange_ntoa(const struct ncprange *range) +{ + char *res; + struct ncpaddr addr; + int len; + + if (!ncprange_getaddr(range, &addr)) + return "<AF_UNSPEC>"; + + res = ncpaddr_ntowa(&addr); + len = strlen(res); + if (len >= NCP_ASCIIBUFFERSIZE - 1) + return res; + + switch (range->ncprange_family) { + case AF_INET: + if (range->ncprange_ip4width == -1) { + /* A non-contiguous mask */ + for (; len >= 3; res[len -= 2] = '\0') + if (strcmp(res + len - 2, ".0")) + break; + snprintf(res + len, sizeof res - len, "&0x%08lx", + (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); + } else if (range->ncprange_ip4width < 32) + snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); + + return res; + +#ifndef NOINET6 + case AF_INET6: + if (range->ncprange_ip6width != 128) + snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); + + return res; +#endif + } + + return "<AF_UNSPEC>"; +} + +#ifndef NOINET6 +int +ncprange_scopeid(const struct ncprange *range) +{ + const struct in6_addr *sin6; + int scopeid = -1; + + if (range->ncprange_family == AF_INET6) { + sin6 = &range->ncprange_ip6addr; + if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) + if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) + scopeid = -1; + } + + return scopeid; +} +#endif + +int +ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) +{ + int bits, len; + char *wp; + const char *cp; + char *s; + + len = strcspn(data, "/"); + + if (ncp && strncasecmp(data, "HISADDR", len) == 0) { + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = ncp->ipcp.peer_ip; + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + return 1; +#ifndef NOINET6 + } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { + range->ncprange_family = AF_INET6; + range->ncprange_ip6addr = ncp->ipv6cp.hisaddr.ncpaddr_ip6addr; + range->ncprange_ip6width = 128; + return 1; +#endif + } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = ncp->ipcp.my_ip; + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + return 1; +#ifndef NOINET6 + } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { + range->ncprange_family = AF_INET6; + range->ncprange_ip6addr = ncp->ipv6cp.myaddr.ncpaddr_ip6addr; + range->ncprange_ip6width = 128; + return 1; +#endif + } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + return 1; + } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { + range->ncprange_family = AF_INET; + range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + return 1; + } + + s = (char *)alloca(len + 1); + strncpy(s, data, len); + s[len] = '\0'; + bits = -1; + + if (data[len] != '\0') { + bits = strtol(data + len + 1, &wp, 0); + if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { + log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); + return 0; + } + } + + if ((cp = strchr(data, ':')) == NULL) { + range->ncprange_family = AF_INET; + + range->ncprange_ip4addr = GetIpAddr(s); + + if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { + log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); + return 0; + } + + if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { + range->ncprange_ip4mask.s_addr = INADDR_ANY; + range->ncprange_ip4width = 0; + } else if (bits == -1) { + range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; + range->ncprange_ip4width = 32; + } else if (bits > 32) { + log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); + return 0; + } else { + range->ncprange_ip4mask = bits2mask4(bits); + range->ncprange_ip4width = bits; + } + + return 1; +#ifndef NOINET6 + } else if (strchr(cp + 1, ':') != NULL) { + range->ncprange_family = AF_INET6; + + if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { + log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); + return 0; + } + + if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) + range->ncprange_ip6width = 0; + else + range->ncprange_ip6width = (bits == -1) ? 128 : bits; + return 1; +#endif + } + + return 0; +} |