[mirror_iproute2.git] / lib / utils.c

/*
 * utils.c
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 *
 * Changes:
 *
 * Rani Assaf <rani@magic.metawire.com> 980929:	resolve addresses
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <resolv.h>
#include <asm/types.h>
#include <linux/pkt_sched.h>

#include "utils.h"

int get_integer(int *val, const char *arg, int base)
{
	long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtol(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res > INT_MAX || res < INT_MIN)
		return -1;
	*val = res;
	return 0;
}

int get_unsigned(unsigned *val, const char *arg, int base)
{
	unsigned long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtoul(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res > UINT_MAX)
		return -1;
	*val = res;
	return 0;
}

int get_u64(__u64 *val, const char *arg, int base)
{
	unsigned long long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtoull(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res == 0xFFFFFFFFULL)
 		return -1;
 	*val = res;
 	return 0;
}

int get_u32(__u32 *val, const char *arg, int base)
{
	unsigned long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtoul(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res > 0xFFFFFFFFUL)
		return -1;
	*val = res;
	return 0;
}

int get_u16(__u16 *val, const char *arg, int base)
{
	unsigned long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtoul(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res > 0xFFFF)
		return -1;
	*val = res;
	return 0;
}

int get_u8(__u8 *val, const char *arg, int base)
{
	unsigned long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtoul(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res > 0xFF)
		return -1;
	*val = res;
	return 0;
}

int get_s16(__s16 *val, const char *arg, int base)
{
	long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtol(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res > 0x7FFF || res < -0x8000)
		return -1;
	*val = res;
	return 0;
}

int get_s8(__s8 *val, const char *arg, int base)
{
	long res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtol(arg, &ptr, base);
	if (!ptr || ptr == arg || *ptr || res > 0x7F || res < -0x80)
		return -1;
	*val = res;
	return 0;
}

int get_addr_1(inet_prefix *addr, const char *name, int family)
{
	const char *cp;
	unsigned char *ap = (unsigned char*)addr->data;
	int i;

	memset(addr, 0, sizeof(*addr));

	if (strcmp(name, "default") == 0 ||
	    strcmp(name, "all") == 0 ||
	    strcmp(name, "any") == 0) {
		if (family == AF_DECnet)
			return -1;
		addr->family = family;
		addr->bytelen = (family == AF_INET6 ? 16 : 4);
		addr->bitlen = -1;
		return 0;
	}

	if (strchr(name, ':')) {
		addr->family = AF_INET6;
		if (family != AF_UNSPEC && family != AF_INET6)
			return -1;
		if (inet_pton(AF_INET6, name, addr->data) <= 0)
			return -1;
		addr->bytelen = 16;
		addr->bitlen = -1;
		return 0;
	}

	if (family == AF_DECnet) {
		struct dn_naddr dna;
		addr->family = AF_DECnet;
		if (dnet_pton(AF_DECnet, name, &dna) <= 0)
			return -1;
		memcpy(addr->data, dna.a_addr, 2);
		addr->bytelen = 2;
		addr->bitlen = -1;
		return 0;
	}

	addr->family = AF_INET;
	if (family != AF_UNSPEC && family != AF_INET)
		return -1;
	addr->bytelen = 4;
	addr->bitlen = -1;
	for (cp=name, i=0; *cp; cp++) {
		if (*cp <= '9' && *cp >= '0') {
			ap[i] = 10*ap[i] + (*cp-'0');
			continue;
		}
		if (*cp == '.' && ++i <= 3)
			continue;
		return -1;
	}
	return 0;
}

int get_prefix_1(inet_prefix *dst, char *arg, int family)
{
	int err;
	unsigned plen;
	char *slash;

	memset(dst, 0, sizeof(*dst));

	if (strcmp(arg, "default") == 0 ||
	    strcmp(arg, "any") == 0 ||
	    strcmp(arg, "all") == 0) {
		if (family == AF_DECnet)
			return -1;
		dst->family = family;
		dst->bytelen = 0;
		dst->bitlen = 0;
		return 0;
	}

	slash = strchr(arg, '/');
	if (slash)
		*slash = 0;

	err = get_addr_1(dst, arg, family);
	if (err == 0) {
		switch(dst->family) {
			case AF_INET6:
				dst->bitlen = 128;
				break;
			case AF_DECnet:
				dst->bitlen = 16;
				break;
			default:
			case AF_INET:
				dst->bitlen = 32;
		}
		if (slash) {
			if (get_integer(&plen, slash+1, 0) || plen > dst->bitlen) {
				err = -1;
				goto done;
			}
			dst->bitlen = plen;
		}
	}
done:
	if (slash)
		*slash = '/';
	return err;
}

int get_addr(inet_prefix *dst, const char *arg, int family)
{
	if (family == AF_PACKET) {
		fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
		exit(1);
	}
	if (get_addr_1(dst, arg, family)) {
		fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", arg);
		exit(1);
	}
	return 0;
}

int get_prefix(inet_prefix *dst, char *arg, int family)
{
	if (family == AF_PACKET) {
		fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
		exit(1);
	}
	if (get_prefix_1(dst, arg, family)) {
		fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", arg);
		exit(1);
	}
	return 0;
}

__u32 get_addr32(const char *name)
{
	inet_prefix addr;
	if (get_addr_1(&addr, name, AF_INET)) {
		fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name);
		exit(1);
	}
	return addr.data[0];
}

void incomplete_command(void)
{
	fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
	exit(-1);
}

void missarg(const char *key)
{
	fprintf(stderr, "Error: argument \"%s\" is required\n", key);
	exit(-1);
}

void invarg(const char *msg, const char *arg)
{
	fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
	exit(-1);
}

void duparg(const char *key, const char *arg)
{
	fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
	exit(-1);
}

void duparg2(const char *key, const char *arg)
{
	fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
	exit(-1);
}

int matches(const char *cmd, const char *pattern)
{
	int len = strlen(cmd);
	if (len > strlen(pattern))
		return -1;
	return memcmp(pattern, cmd, len);
}

int inet_addr_match(const inet_prefix *a, const inet_prefix *b, int bits)
{
	__u32 *a1 = a->data;
	__u32 *a2 = b->data;
	int words = bits >> 0x05;

	bits &= 0x1f;

	if (words)
		if (memcmp(a1, a2, words << 2))
			return -1;

	if (bits) {
		__u32 w1, w2;
		__u32 mask;

		w1 = a1[words];
		w2 = a2[words];

		mask = htonl((0xffffffff) << (0x20 - bits));

		if ((w1 ^ w2) & mask)
			return 1;
	}

	return 0;
}

int __iproute2_hz_internal;

int __get_hz(void)
{
	char name[1024];
	int hz = 0;
	FILE *fp;

	if (getenv("HZ"))
		return atoi(getenv("HZ")) ? : HZ;

	if (getenv("PROC_NET_PSCHED")) {
		snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
	} else if (getenv("PROC_ROOT")) {
		snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
	} else {
		strcpy(name, "/proc/net/psched");
	}
	fp = fopen(name, "r");

	if (fp) {
		unsigned nom, denom;
		if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2)
			if (nom == 1000000)
				hz = denom;
		fclose(fp);
	}
	if (hz)
		return hz;
	return HZ;
}

const char *rt_addr_n2a(int af, int len, const void *addr, char *buf, int buflen)
{
	switch (af) {
	case AF_INET:
	case AF_INET6:
		return inet_ntop(af, addr, buf, buflen);
	case AF_IPX:
		return ipx_ntop(af, addr, buf, buflen);
	case AF_DECnet:
	{
		struct dn_naddr dna = { 2, { 0, 0, }};
		memcpy(dna.a_addr, addr, 2);
		return dnet_ntop(af, &dna, buf, buflen);
	}
	default:
		return "???";
	}
}

#ifdef RESOLVE_HOSTNAMES
struct namerec
{
	struct namerec *next;
	inet_prefix addr;
	char	    *name;
};

static struct namerec *nht[256];

char *resolve_address(const char *addr, int len, int af)
{
	struct namerec *n;
	struct hostent *h_ent;
	unsigned hash;
	static int notfirst;


	if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
	    ((__u32*)addr)[1] == 0 && ((__u32*)addr)[2] == htonl(0xffff)) {
		af = AF_INET;
		addr += 12;
		len = 4;
	}

	hash = addr[len-1] ^ addr[len-2] ^ addr[len-3] ^ addr[len-4];

	for (n = nht[hash]; n; n = n->next) {
		if (n->addr.family == af &&
		    n->addr.bytelen == len &&
		    memcmp(n->addr.data, addr, len) == 0)
			return n->name;
	}
	if ((n = malloc(sizeof(*n))) == NULL)
		return NULL;
	n->addr.family = af;
	n->addr.bytelen = len;
	n->name = NULL;
	memcpy(n->addr.data, addr, len);
	n->next = nht[hash];
	nht[hash] = n;
	if (++notfirst == 1)
		sethostent(1);
	fflush(stdout);

	if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
		n->name = strdup(h_ent->h_name);

	/* Even if we fail, "negative" entry is remembered. */
	return n->name;
}
#endif


const char *format_host(int af, int len, const void *addr,
			char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES
	if (resolve_hosts) {
		char *n;
		if (len <= 0) {
			switch (af) {
			case AF_INET:
				len = 4;
				break;
			case AF_INET6:
				len = 16;
				break;
			case AF_IPX:
				len = 10;
				break;
#ifdef AF_DECnet
			/* I see no reasons why gethostbyname
			   may not work for DECnet */
			case AF_DECnet:
				len = 2;
				break;
#endif
			default: ;
			}
		}
		if (len > 0 &&
		    (n = resolve_address(addr, len, af)) != NULL)
			return n;
	}
#endif
	return rt_addr_n2a(af, len, addr, buf, buflen);
}


__u8* hexstring_n2a(const __u8 *str, int len, __u8 *buf, int blen)
{
	__u8 *ptr = buf;
	int i;

	for (i=0; i<len; i++) {
		if (blen < 3)
			break;
		sprintf(ptr, "%02x", str[i]);
		ptr += 2;
		blen -= 2;
		if (i != len-1 && blen > 1) {
			*ptr++ = ':';
			blen--;
		}
	}
	return buf;
}

__u8* hexstring_a2n(const __u8 *str, __u8 *buf, int blen)
{
	int cnt = 0;

	for (;;) {
		unsigned acc;
		char ch;

		acc = 0;

		while ((ch = *str) != ':' && ch != 0) {
			if (ch >= '0' && ch <= '9')
				ch -= '0';
			else if (ch >= 'a' && ch <= 'f')
				ch -= 'a'-10;
			else if (ch >= 'A' && ch <= 'F')
				ch -= 'A'-10;
			else
				return NULL;
			acc = (acc<<4) + ch;
			str++;
		}

		if (acc > 255)
			return NULL;
		if (cnt < blen) {
			buf[cnt] = acc;
			cnt++;
		}
		if (ch == 0)
			break;
		++str;
	}
	if (cnt < blen)
		memset(buf+cnt, 0, blen-cnt);
	return buf;
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* utils.c
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	*
	11	*
	12	* Changes:
	13	*
	14	* Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
	15	*/
	16
	17	#include <stdio.h>
	18	#include <stdlib.h>
	19	#include <unistd.h>
	20	#include <syslog.h>
	21	#include <fcntl.h>
	22	#include <sys/socket.h>
	23	#include <netinet/in.h>
	24	#include <string.h>
	25	#include <netdb.h>
	26	#include <arpa/inet.h>
	27	#include <resolv.h>
5dfe5561	28	#include <asm/types.h>
aba5acdf SH	29	#include <linux/pkt_sched.h>
	30
	31	#include "utils.h"
	32
4094db72	33	int get_integer(int val, const char arg, int base)
aba5acdf SH	34	{
	35	long res;
	36	char *ptr;
	37
	38	if (!arg \|\| !*arg)
	39	return -1;
	40	res = strtol(arg, &ptr, base);
	41	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > INT_MAX \|\| res < INT_MIN)
	42	return -1;
	43	*val = res;
	44	return 0;
	45	}
	46
4094db72	47	int get_unsigned(unsigned val, const char arg, int base)
aba5acdf SH	48	{
	49	unsigned long res;
	50	char *ptr;
	51
	52	if (!arg \|\| !*arg)
	53	return -1;
	54	res = strtoul(arg, &ptr, base);
	55	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > UINT_MAX)
	56	return -1;
	57	*val = res;
	58	return 0;
	59	}
	60
c7699875	61	int get_u64(__u64 val, const char arg, int base)
	62	{
	63	unsigned long long res;
	64	char *ptr;
	65
	66	if (!arg \|\| !*arg)
	67	return -1;
	68	res = strtoull(arg, &ptr, base);
	69	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res == 0xFFFFFFFFULL)
	70	return -1;
	71	*val = res;
	72	return 0;
	73	}
	74
4094db72	75	int get_u32(__u32 val, const char arg, int base)
aba5acdf SH	76	{
	77	unsigned long res;
	78	char *ptr;
	79
	80	if (!arg \|\| !*arg)
	81	return -1;
	82	res = strtoul(arg, &ptr, base);
	83	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFFFFFFFFUL)
	84	return -1;
	85	*val = res;
	86	return 0;
	87	}
	88
4094db72	89	int get_u16(__u16 val, const char arg, int base)
aba5acdf SH	90	{
	91	unsigned long res;
	92	char *ptr;
	93
	94	if (!arg \|\| !*arg)
	95	return -1;
	96	res = strtoul(arg, &ptr, base);
	97	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFFFF)
	98	return -1;
	99	*val = res;
	100	return 0;
	101	}
	102
4094db72	103	int get_u8(__u8 val, const char arg, int base)
aba5acdf SH	104	{
	105	unsigned long res;
	106	char *ptr;
	107
	108	if (!arg \|\| !*arg)
	109	return -1;
	110	res = strtoul(arg, &ptr, base);
	111	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFF)
	112	return -1;
	113	*val = res;
	114	return 0;
	115	}
	116
4094db72	117	int get_s16(__s16 val, const char arg, int base)
aba5acdf SH	118	{
	119	long res;
	120	char *ptr;
	121
	122	if (!arg \|\| !*arg)
	123	return -1;
	124	res = strtol(arg, &ptr, base);
	125	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0x7FFF \|\| res < -0x8000)
	126	return -1;
	127	*val = res;
	128	return 0;
	129	}
	130
4094db72	131	int get_s8(__s8 val, const char arg, int base)
aba5acdf SH	132	{
	133	long res;
	134	char *ptr;
	135
	136	if (!arg \|\| !*arg)
	137	return -1;
	138	res = strtol(arg, &ptr, base);
	139	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0x7F \|\| res < -0x80)
	140	return -1;
	141	*val = res;
	142	return 0;
	143	}
	144
4094db72	145	int get_addr_1(inet_prefix addr, const char name, int family)
aba5acdf	146	{
4094db72	147	const char *cp;
aba5acdf SH	148	unsigned char ap = (unsigned char)addr->data;
	149	int i;
	150
	151	memset(addr, 0, sizeof(*addr));
	152
	153	if (strcmp(name, "default") == 0 \|\|
	154	strcmp(name, "all") == 0 \|\|
	155	strcmp(name, "any") == 0) {
	156	if (family == AF_DECnet)
	157	return -1;
	158	addr->family = family;
	159	addr->bytelen = (family == AF_INET6 ? 16 : 4);
	160	addr->bitlen = -1;
	161	return 0;
	162	}
	163
	164	if (strchr(name, ':')) {
	165	addr->family = AF_INET6;
	166	if (family != AF_UNSPEC && family != AF_INET6)
	167	return -1;
	168	if (inet_pton(AF_INET6, name, addr->data) <= 0)
	169	return -1;
	170	addr->bytelen = 16;
	171	addr->bitlen = -1;
	172	return 0;
	173	}
	174
	175	if (family == AF_DECnet) {
	176	struct dn_naddr dna;
	177	addr->family = AF_DECnet;
	178	if (dnet_pton(AF_DECnet, name, &dna) <= 0)
	179	return -1;
	180	memcpy(addr->data, dna.a_addr, 2);
	181	addr->bytelen = 2;
	182	addr->bitlen = -1;
	183	return 0;
	184	}
	185
	186	addr->family = AF_INET;
	187	if (family != AF_UNSPEC && family != AF_INET)
	188	return -1;
	189	addr->bytelen = 4;
	190	addr->bitlen = -1;
	191	for (cp=name, i=0; *cp; cp++) {
	192	if (cp <= '9' && cp >= '0') {
	193	ap[i] = 10ap[i] + (cp-'0');
	194	continue;
	195	}
	196	if (*cp == '.' && ++i <= 3)
	197	continue;
	198	return -1;
	199	}
	200	return 0;
	201	}
	202
fb9b1d0f	203	int get_prefix_1(inet_prefix dst, char arg, int family)
aba5acdf SH	204	{
	205	int err;
	206	unsigned plen;
	207	char *slash;
	208
	209	memset(dst, 0, sizeof(*dst));
	210
	211	if (strcmp(arg, "default") == 0 \|\|
	212	strcmp(arg, "any") == 0 \|\|
	213	strcmp(arg, "all") == 0) {
	214	if (family == AF_DECnet)
	215	return -1;
	216	dst->family = family;
	217	dst->bytelen = 0;
	218	dst->bitlen = 0;
	219	return 0;
	220	}
	221
	222	slash = strchr(arg, '/');
	223	if (slash)
	224	*slash = 0;
fb9b1d0f	225
aba5acdf SH	226	err = get_addr_1(dst, arg, family);
	227	if (err == 0) {
	228	switch(dst->family) {
	229	case AF_INET6:
	230	dst->bitlen = 128;
	231	break;
	232	case AF_DECnet:
	233	dst->bitlen = 16;
	234	break;
	235	default:
	236	case AF_INET:
	237	dst->bitlen = 32;
	238	}
	239	if (slash) {
	240	if (get_integer(&plen, slash+1, 0) \|\| plen > dst->bitlen) {
	241	err = -1;
	242	goto done;
	243	}
	244	dst->bitlen = plen;
	245	}
	246	}
	247	done:
	248	if (slash)
	249	*slash = '/';
	250	return err;
	251	}
	252
c7699875	253	int get_addr(inet_prefix dst, const char arg, int family)
aba5acdf SH	254	{
	255	if (family == AF_PACKET) {
	256	fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
	257	exit(1);
	258	}
	259	if (get_addr_1(dst, arg, family)) {
	260	fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", arg);
	261	exit(1);
	262	}
	263	return 0;
	264	}
	265
fb9b1d0f	266	int get_prefix(inet_prefix dst, char arg, int family)
aba5acdf SH	267	{
	268	if (family == AF_PACKET) {
	269	fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
	270	exit(1);
	271	}
	272	if (get_prefix_1(dst, arg, family)) {
	273	fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", arg);
	274	exit(1);
	275	}
	276	return 0;
	277	}
	278
c7699875	279	__u32 get_addr32(const char *name)
aba5acdf SH	280	{
	281	inet_prefix addr;
	282	if (get_addr_1(&addr, name, AF_INET)) {
	283	fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name);
	284	exit(1);
	285	}
	286	return addr.data[0];
	287	}
	288
4094db72	289	void incomplete_command(void)
aba5acdf SH	290	{
	291	fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
	292	exit(-1);
	293	}
	294
c7699875	295	void missarg(const char *key)
	296	{
	297	fprintf(stderr, "Error: argument \"%s\" is required\n", key);
	298	exit(-1);
	299	}
	300
4094db72	301	void invarg(const char msg, const char arg)
aba5acdf SH	302	{
	303	fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
	304	exit(-1);
	305	}
	306
4094db72	307	void duparg(const char key, const char arg)
aba5acdf SH	308	{
	309	fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
	310	exit(-1);
	311	}
	312
4094db72	313	void duparg2(const char key, const char arg)
aba5acdf SH	314	{
	315	fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
	316	exit(-1);
	317	}
	318
4094db72	319	int matches(const char cmd, const char pattern)
aba5acdf SH	320	{
	321	int len = strlen(cmd);
	322	if (len > strlen(pattern))
	323	return -1;
	324	return memcmp(pattern, cmd, len);
	325	}
	326
4094db72	327	int inet_addr_match(const inet_prefix a, const inet_prefix b, int bits)
aba5acdf SH	328	{
	329	__u32 *a1 = a->data;
	330	__u32 *a2 = b->data;
	331	int words = bits >> 0x05;
	332
	333	bits &= 0x1f;
	334
	335	if (words)
	336	if (memcmp(a1, a2, words << 2))
	337	return -1;
	338
	339	if (bits) {
	340	__u32 w1, w2;
	341	__u32 mask;
	342
	343	w1 = a1[words];
	344	w2 = a2[words];
	345
	346	mask = htonl((0xffffffff) << (0x20 - bits));
	347
	348	if ((w1 ^ w2) & mask)
	349	return 1;
	350	}
	351
	352	return 0;
	353	}
	354
	355	int __iproute2_hz_internal;
	356
	357	int __get_hz(void)
	358	{
	359	char name[1024];
	360	int hz = 0;
	361	FILE *fp;
	362
	363	if (getenv("HZ"))
	364	return atoi(getenv("HZ")) ? : HZ;
	365
	366	if (getenv("PROC_NET_PSCHED")) {
	367	snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
c7699875	368	} else if (getenv("PROC_ROOT")) {
aba5acdf SH	369	snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
	370	} else {
	371	strcpy(name, "/proc/net/psched");
	372	}
	373	fp = fopen(name, "r");
	374
	375	if (fp) {
	376	unsigned nom, denom;
	377	if (fscanf(fp, "%08x%08x%08x%08x", &nom, &denom) == 2)
	378	if (nom == 1000000)
	379	hz = denom;
	380	fclose(fp);
	381	}
	382	if (hz)
	383	return hz;
	384	return HZ;
	385	}
	386
4094db72	387	const char rt_addr_n2a(int af, int len, const void addr, char *buf, int buflen)
aba5acdf SH	388	{
	389	switch (af) {
	390	case AF_INET:
	391	case AF_INET6:
	392	return inet_ntop(af, addr, buf, buflen);
	393	case AF_IPX:
	394	return ipx_ntop(af, addr, buf, buflen);
	395	case AF_DECnet:
	396	{
	397	struct dn_naddr dna = { 2, { 0, 0, }};
	398	memcpy(dna.a_addr, addr, 2);
	399	return dnet_ntop(af, &dna, buf, buflen);
	400	}
	401	default:
	402	return "???";
	403	}
	404	}
	405
	406	#ifdef RESOLVE_HOSTNAMES
	407	struct namerec
	408	{
	409	struct namerec *next;
	410	inet_prefix addr;
	411	char *name;
	412	};
	413
	414	static struct namerec *nht[256];
	415
4094db72	416	char resolve_address(const char addr, int len, int af)
aba5acdf SH	417	{
	418	struct namerec *n;
	419	struct hostent *h_ent;
	420	unsigned hash;
	421	static int notfirst;
	422
	423
	424	if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
	425	((__u32)addr)[1] == 0 && ((__u32)addr)[2] == htonl(0xffff)) {
	426	af = AF_INET;
	427	addr += 12;
	428	len = 4;
	429	}
	430
	431	hash = addr[len-1] ^ addr[len-2] ^ addr[len-3] ^ addr[len-4];
	432
	433	for (n = nht[hash]; n; n = n->next) {
	434	if (n->addr.family == af &&
	435	n->addr.bytelen == len &&
	436	memcmp(n->addr.data, addr, len) == 0)
	437	return n->name;
	438	}
	439	if ((n = malloc(sizeof(*n))) == NULL)
	440	return NULL;
	441	n->addr.family = af;
	442	n->addr.bytelen = len;
	443	n->name = NULL;
	444	memcpy(n->addr.data, addr, len);
	445	n->next = nht[hash];
	446	nht[hash] = n;
	447	if (++notfirst == 1)
	448	sethostent(1);
	449	fflush(stdout);
	450
c7699875	451	if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
aba5acdf SH	452	n->name = strdup(h_ent->h_name);
	453
	454	/* Even if we fail, "negative" entry is remembered. */
	455	return n->name;
	456	}
	457	#endif
	458
	459
c7699875	460	const char format_host(int af, int len, const void addr,
4094db72	461	char *buf, int buflen)
aba5acdf SH	462	{
	463	#ifdef RESOLVE_HOSTNAMES
	464	if (resolve_hosts) {
	465	char *n;
	466	if (len <= 0) {
	467	switch (af) {
	468	case AF_INET:
	469	len = 4;
	470	break;
	471	case AF_INET6:
	472	len = 16;
	473	break;
	474	case AF_IPX:
	475	len = 10;
	476	break;
	477	#ifdef AF_DECnet
	478	/* I see no reasons why gethostbyname
	479	may not work for DECnet */
	480	case AF_DECnet:
	481	len = 2;
	482	break;
	483	#endif
	484	default: ;
	485	}
	486	}
	487	if (len > 0 &&
	488	(n = resolve_address(addr, len, af)) != NULL)
	489	return n;
	490	}
	491	#endif
	492	return rt_addr_n2a(af, len, addr, buf, buflen);
	493	}
	494
	495
	496	__u8* hexstring_n2a(const __u8 str, int len, __u8 buf, int blen)
	497	{
	498	__u8 *ptr = buf;
	499	int i;
	500
	501	for (i=0; i<len; i++) {
	502	if (blen < 3)
	503	break;
	504	sprintf(ptr, "%02x", str[i]);
	505	ptr += 2;
	506	blen -= 2;
	507	if (i != len-1 && blen > 1) {
	508	*ptr++ = ':';
	509	blen--;
	510	}
	511	}
	512	return buf;
	513	}
	514
	515	__u8* hexstring_a2n(const __u8 str, __u8 buf, int blen)
	516	{
	517	int cnt = 0;
	518
	519	for (;;) {
	520	unsigned acc;
	521	char ch;
	522
	523	acc = 0;
	524
	525	while ((ch = *str) != ':' && ch != 0) {
526	if (ch >= '0' && ch <= '9')
527	ch -= '0';
528	else if (ch >= 'a' && ch <= 'f')
529	ch -= 'a'-10;
530	else if (ch >= 'A' && ch <= 'F')
531	ch -= 'A'-10;
532	else
533	return NULL;
534	acc = (acc<<4) + ch;
535	str++;
536	}
537
538	if (acc > 255)
539	return NULL;
540	if (cnt < blen) {
541	buf[cnt] = acc;
542	cnt++;
543	}
544	if (ch == 0)
545	break;
546	++str;
547	}
548	if (cnt < blen)
549	memset(buf+cnt, 0, blen-cnt);
550	return buf;
551	}