[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 <time.h>
#include <sys/time.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_unsigned(&plen, slash+1, 0) || plen > dst->bitlen) {
				err = -1;
				goto done;
			}
			dst->flags |= PREFIXLEN_SPECIFIED;
			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;
}

int __iproute2_user_hz_internal;

int __get_user_hz(void)
{
	return sysconf(_SC_CLK_TCK);
}

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);
}


char *hexstring_n2a(const __u8 *str, int len, char *buf, int blen)
{
	char *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 char *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;
}

int print_timestamp(FILE *fp)
{
	struct timeval tv;
	char *tstr;

	memset(&tv, 0, sizeof(tv));
	gettimeofday(&tv, NULL);

	tstr = asctime(localtime(&tv.tv_sec));
	tstr[strlen(tstr)-1] = 0;
	fprintf(fp, "Timestamp: %s %lu usec\n", tstr, tv.tv_usec);
	return 0;
}

int cmdlineno;

/* Like glibc getline but handle continuation lines and comments */
size_t getcmdline(char **linep, size_t *lenp, FILE *in)
{
	size_t cc;
	char *cp;
		
	if ((cc = getline(linep, lenp, in)) < 0)
		return cc;	/* eof or error */
	++cmdlineno;

	cp = strchr(*linep, '#');
	if (cp) 
		*cp = '\0';
	
	while ((cp = strstr(*linep, "\\\n")) != NULL) {
		char *line1 = NULL;
		size_t len1 = 0;
		size_t cc1;

		if ((cc1 = getline(&line1, &len1, in)) < 0) {
			fprintf(stderr, "Missing continuation line\n");
			return cc1;
		}

		++cmdlineno;
		*cp = 0;

		cp = strchr(line1, '#');
		if (cp) 
			*cp = '\0';

		*linep = realloc(*linep, strlen(*linep) + strlen(line1) + 1);
		if (!*linep) {
			fprintf(stderr, "Out of memory\n");
			return -1;
		}
		cc += cc1 - 2;
		strcat(*linep, line1);
		free(line1);
	}
	return cc;
}

/* split command line into argument vector */
int makeargs(char *line, char *argv[], int maxargs)
{
	static const char ws[] = " \t\r\n";
	char *cp;
	int argc = 0;

	for (cp = strtok(line, ws); cp; cp = strtok(NULL, ws)) {
		if (argc >= (maxargs - 1)) {
			fprintf(stderr, "Too many arguments to command\n");
			exit(1);
		}
		argv[argc++] = cp;
	}
	argv[argc] = NULL;

	return argc;
}
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	29	#include <linux/pkt_sched.h>
90f93024 SH	30	#include <time.h>
	31	#include <sys/time.h>
	32
aba5acdf SH	33
	34	#include "utils.h"
	35
4094db72	36	int get_integer(int val, const char arg, int base)
aba5acdf SH	37	{
	38	long res;
	39	char *ptr;
	40
	41	if (!arg \|\| !*arg)
	42	return -1;
	43	res = strtol(arg, &ptr, base);
	44	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > INT_MAX \|\| res < INT_MIN)
	45	return -1;
	46	*val = res;
	47	return 0;
	48	}
	49
4094db72	50	int get_unsigned(unsigned val, const char arg, int base)
aba5acdf SH	51	{
	52	unsigned long res;
	53	char *ptr;
	54
	55	if (!arg \|\| !*arg)
	56	return -1;
	57	res = strtoul(arg, &ptr, base);
	58	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > UINT_MAX)
	59	return -1;
	60	*val = res;
	61	return 0;
	62	}
	63
c7699875	64	int get_u64(__u64 val, const char arg, int base)
	65	{
	66	unsigned long long res;
	67	char *ptr;
	68
	69	if (!arg \|\| !*arg)
	70	return -1;
	71	res = strtoull(arg, &ptr, base);
	72	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res == 0xFFFFFFFFULL)
	73	return -1;
	74	*val = res;
	75	return 0;
	76	}
	77
4094db72	78	int get_u32(__u32 val, const char arg, int base)
aba5acdf SH	79	{
	80	unsigned long res;
	81	char *ptr;
	82
	83	if (!arg \|\| !*arg)
	84	return -1;
	85	res = strtoul(arg, &ptr, base);
	86	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFFFFFFFFUL)
	87	return -1;
	88	*val = res;
	89	return 0;
	90	}
	91
4094db72	92	int get_u16(__u16 val, const char arg, int base)
aba5acdf SH	93	{
	94	unsigned long res;
	95	char *ptr;
	96
	97	if (!arg \|\| !*arg)
	98	return -1;
	99	res = strtoul(arg, &ptr, base);
	100	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFFFF)
	101	return -1;
	102	*val = res;
	103	return 0;
	104	}
	105
4094db72	106	int get_u8(__u8 val, const char arg, int base)
aba5acdf SH	107	{
	108	unsigned long res;
	109	char *ptr;
	110
	111	if (!arg \|\| !*arg)
	112	return -1;
	113	res = strtoul(arg, &ptr, base);
	114	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0xFF)
	115	return -1;
	116	*val = res;
	117	return 0;
	118	}
	119
4094db72	120	int get_s16(__s16 val, const char arg, int base)
aba5acdf SH	121	{
	122	long res;
	123	char *ptr;
	124
	125	if (!arg \|\| !*arg)
	126	return -1;
	127	res = strtol(arg, &ptr, base);
	128	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0x7FFF \|\| res < -0x8000)
	129	return -1;
	130	*val = res;
	131	return 0;
	132	}
	133
4094db72	134	int get_s8(__s8 val, const char arg, int base)
aba5acdf SH	135	{
	136	long res;
	137	char *ptr;
	138
	139	if (!arg \|\| !*arg)
	140	return -1;
	141	res = strtol(arg, &ptr, base);
	142	if (!ptr \|\| ptr == arg \|\| *ptr \|\| res > 0x7F \|\| res < -0x80)
	143	return -1;
	144	*val = res;
	145	return 0;
	146	}
	147
4094db72	148	int get_addr_1(inet_prefix addr, const char name, int family)
aba5acdf	149	{
4094db72	150	const char *cp;
aba5acdf SH	151	unsigned char ap = (unsigned char)addr->data;
	152	int i;
	153
	154	memset(addr, 0, sizeof(*addr));
	155
	156	if (strcmp(name, "default") == 0 \|\|
	157	strcmp(name, "all") == 0 \|\|
	158	strcmp(name, "any") == 0) {
	159	if (family == AF_DECnet)
	160	return -1;
	161	addr->family = family;
	162	addr->bytelen = (family == AF_INET6 ? 16 : 4);
	163	addr->bitlen = -1;
	164	return 0;
	165	}
	166
	167	if (strchr(name, ':')) {
	168	addr->family = AF_INET6;
	169	if (family != AF_UNSPEC && family != AF_INET6)
	170	return -1;
	171	if (inet_pton(AF_INET6, name, addr->data) <= 0)
	172	return -1;
	173	addr->bytelen = 16;
	174	addr->bitlen = -1;
	175	return 0;
	176	}
	177
	178	if (family == AF_DECnet) {
	179	struct dn_naddr dna;
	180	addr->family = AF_DECnet;
	181	if (dnet_pton(AF_DECnet, name, &dna) <= 0)
	182	return -1;
	183	memcpy(addr->data, dna.a_addr, 2);
	184	addr->bytelen = 2;
	185	addr->bitlen = -1;
	186	return 0;
	187	}
	188
	189	addr->family = AF_INET;
	190	if (family != AF_UNSPEC && family != AF_INET)
	191	return -1;
	192	addr->bytelen = 4;
	193	addr->bitlen = -1;
	194	for (cp=name, i=0; *cp; cp++) {
	195	if (cp <= '9' && cp >= '0') {
	196	ap[i] = 10ap[i] + (cp-'0');
	197	continue;
	198	}
	199	if (*cp == '.' && ++i <= 3)
	200	continue;
	201	return -1;
	202	}
	203	return 0;
	204	}
	205
fb9b1d0f	206	int get_prefix_1(inet_prefix dst, char arg, int family)
aba5acdf SH	207	{
	208	int err;
	209	unsigned plen;
	210	char *slash;
	211
	212	memset(dst, 0, sizeof(*dst));
	213
	214	if (strcmp(arg, "default") == 0 \|\|
	215	strcmp(arg, "any") == 0 \|\|
	216	strcmp(arg, "all") == 0) {
	217	if (family == AF_DECnet)
	218	return -1;
	219	dst->family = family;
	220	dst->bytelen = 0;
	221	dst->bitlen = 0;
	222	return 0;
	223	}
	224
	225	slash = strchr(arg, '/');
	226	if (slash)
	227	*slash = 0;
fb9b1d0f	228
aba5acdf SH	229	err = get_addr_1(dst, arg, family);
	230	if (err == 0) {
	231	switch(dst->family) {
	232	case AF_INET6:
	233	dst->bitlen = 128;
	234	break;
	235	case AF_DECnet:
	236	dst->bitlen = 16;
	237	break;
	238	default:
	239	case AF_INET:
	240	dst->bitlen = 32;
	241	}
	242	if (slash) {
f332d169	243	if (get_unsigned(&plen, slash+1, 0) \|\| plen > dst->bitlen) {
aba5acdf SH	244	err = -1;
	245	goto done;
	246	}
f082b64f	247	dst->flags \|= PREFIXLEN_SPECIFIED;
aba5acdf SH	248	dst->bitlen = plen;
	249	}
	250	}
	251	done:
	252	if (slash)
	253	*slash = '/';
	254	return err;
	255	}
	256
c7699875	257	int get_addr(inet_prefix dst, const char arg, int family)
aba5acdf SH	258	{
	259	if (family == AF_PACKET) {
	260	fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
	261	exit(1);
	262	}
	263	if (get_addr_1(dst, arg, family)) {
	264	fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", arg);
	265	exit(1);
	266	}
	267	return 0;
	268	}
	269
fb9b1d0f	270	int get_prefix(inet_prefix dst, char arg, int family)
aba5acdf SH	271	{
	272	if (family == AF_PACKET) {
	273	fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
	274	exit(1);
	275	}
	276	if (get_prefix_1(dst, arg, family)) {
	277	fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", arg);
	278	exit(1);
	279	}
	280	return 0;
	281	}
	282
c7699875	283	__u32 get_addr32(const char *name)
aba5acdf SH	284	{
	285	inet_prefix addr;
	286	if (get_addr_1(&addr, name, AF_INET)) {
	287	fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name);
	288	exit(1);
	289	}
	290	return addr.data[0];
	291	}
	292
4094db72	293	void incomplete_command(void)
aba5acdf SH	294	{
	295	fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
	296	exit(-1);
	297	}
	298
c7699875	299	void missarg(const char *key)
	300	{
	301	fprintf(stderr, "Error: argument \"%s\" is required\n", key);
	302	exit(-1);
	303	}
	304
4094db72	305	void invarg(const char msg, const char arg)
aba5acdf SH	306	{
	307	fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
	308	exit(-1);
	309	}
	310
4094db72	311	void duparg(const char key, const char arg)
aba5acdf SH	312	{
	313	fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
	314	exit(-1);
	315	}
	316
4094db72	317	void duparg2(const char key, const char arg)
aba5acdf SH	318	{
	319	fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
	320	exit(-1);
	321	}
	322
4094db72	323	int matches(const char cmd, const char pattern)
aba5acdf SH	324	{
	325	int len = strlen(cmd);
	326	if (len > strlen(pattern))
	327	return -1;
	328	return memcmp(pattern, cmd, len);
	329	}
	330
4094db72	331	int inet_addr_match(const inet_prefix a, const inet_prefix b, int bits)
aba5acdf SH	332	{
	333	__u32 *a1 = a->data;
	334	__u32 *a2 = b->data;
	335	int words = bits >> 0x05;
	336
	337	bits &= 0x1f;
	338
	339	if (words)
	340	if (memcmp(a1, a2, words << 2))
	341	return -1;
	342
	343	if (bits) {
	344	__u32 w1, w2;
	345	__u32 mask;
	346
	347	w1 = a1[words];
	348	w2 = a2[words];
	349
	350	mask = htonl((0xffffffff) << (0x20 - bits));
	351
	352	if ((w1 ^ w2) & mask)
	353	return 1;
	354	}
	355
	356	return 0;
	357	}
	358
	359	int __iproute2_hz_internal;
	360
	361	int __get_hz(void)
	362	{
	363	char name[1024];
	364	int hz = 0;
	365	FILE *fp;
	366
	367	if (getenv("HZ"))
	368	return atoi(getenv("HZ")) ? : HZ;
	369
	370	if (getenv("PROC_NET_PSCHED")) {
	371	snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
c7699875	372	} else if (getenv("PROC_ROOT")) {
aba5acdf SH	373	snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
	374	} else {
	375	strcpy(name, "/proc/net/psched");
	376	}
	377	fp = fopen(name, "r");
	378
	379	if (fp) {
	380	unsigned nom, denom;
	381	if (fscanf(fp, "%08x%08x%08x%08x", &nom, &denom) == 2)
	382	if (nom == 1000000)
	383	hz = denom;
	384	fclose(fp);
	385	}
	386	if (hz)
	387	return hz;
	388	return HZ;
	389	}
	390
5e8bc631	391	int __iproute2_user_hz_internal;
	392
	393	int __get_user_hz(void)
	394	{
	395	return sysconf(_SC_CLK_TCK);
	396	}
	397
4094db72	398	const char rt_addr_n2a(int af, int len, const void addr, char *buf, int buflen)
aba5acdf SH	399	{
	400	switch (af) {
	401	case AF_INET:
	402	case AF_INET6:
	403	return inet_ntop(af, addr, buf, buflen);
	404	case AF_IPX:
	405	return ipx_ntop(af, addr, buf, buflen);
	406	case AF_DECnet:
	407	{
	408	struct dn_naddr dna = { 2, { 0, 0, }};
	409	memcpy(dna.a_addr, addr, 2);
	410	return dnet_ntop(af, &dna, buf, buflen);
	411	}
	412	default:
	413	return "???";
	414	}
	415	}
	416
	417	#ifdef RESOLVE_HOSTNAMES
	418	struct namerec
	419	{
	420	struct namerec *next;
	421	inet_prefix addr;
	422	char *name;
	423	};
	424
	425	static struct namerec *nht[256];
	426
4094db72	427	char resolve_address(const char addr, int len, int af)
aba5acdf SH	428	{
	429	struct namerec *n;
	430	struct hostent *h_ent;
	431	unsigned hash;
	432	static int notfirst;
	433
	434
	435	if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
	436	((__u32)addr)[1] == 0 && ((__u32)addr)[2] == htonl(0xffff)) {
	437	af = AF_INET;
	438	addr += 12;
	439	len = 4;
	440	}
	441
	442	hash = addr[len-1] ^ addr[len-2] ^ addr[len-3] ^ addr[len-4];
	443
	444	for (n = nht[hash]; n; n = n->next) {
	445	if (n->addr.family == af &&
	446	n->addr.bytelen == len &&
	447	memcmp(n->addr.data, addr, len) == 0)
	448	return n->name;
	449	}
	450	if ((n = malloc(sizeof(*n))) == NULL)
	451	return NULL;
	452	n->addr.family = af;
	453	n->addr.bytelen = len;
	454	n->name = NULL;
	455	memcpy(n->addr.data, addr, len);
	456	n->next = nht[hash];
	457	nht[hash] = n;
	458	if (++notfirst == 1)
	459	sethostent(1);
	460	fflush(stdout);
	461
c7699875	462	if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
aba5acdf SH	463	n->name = strdup(h_ent->h_name);
	464
	465	/* Even if we fail, "negative" entry is remembered. */
	466	return n->name;
	467	}
	468	#endif
	469
	470
c7699875	471	const char format_host(int af, int len, const void addr,
4094db72	472	char *buf, int buflen)
aba5acdf SH	473	{
	474	#ifdef RESOLVE_HOSTNAMES
	475	if (resolve_hosts) {
	476	char *n;
	477	if (len <= 0) {
	478	switch (af) {
	479	case AF_INET:
	480	len = 4;
	481	break;
	482	case AF_INET6:
	483	len = 16;
	484	break;
	485	case AF_IPX:
	486	len = 10;
	487	break;
	488	#ifdef AF_DECnet
	489	/* I see no reasons why gethostbyname
	490	may not work for DECnet */
	491	case AF_DECnet:
	492	len = 2;
	493	break;
	494	#endif
	495	default: ;
	496	}
	497	}
	498	if (len > 0 &&
	499	(n = resolve_address(addr, len, af)) != NULL)
	500	return n;
	501	}
	502	#endif
	503	return rt_addr_n2a(af, len, addr, buf, buflen);
	504	}
	505
	506
f332d169	507	char hexstring_n2a(const __u8 str, int len, char *buf, int blen)
aba5acdf	508	{
f332d169	509	char *ptr = buf;
aba5acdf SH	510	int i;
	511
	512	for (i=0; i<len; i++) {
	513	if (blen < 3)
	514	break;
	515	sprintf(ptr, "%02x", str[i]);
	516	ptr += 2;
	517	blen -= 2;
	518	if (i != len-1 && blen > 1) {
	519	*ptr++ = ':';
	520	blen--;
	521	}
	522	}
	523	return buf;
	524	}
	525
f332d169	526	__u8* hexstring_a2n(const char str, __u8 buf, int blen)
aba5acdf SH	527	{
	528	int cnt = 0;
	529
	530	for (;;) {
	531	unsigned acc;
	532	char ch;
	533
	534	acc = 0;
	535
	536	while ((ch = *str) != ':' && ch != 0) {
	537	if (ch >= '0' && ch <= '9')
	538	ch -= '0';
	539	else if (ch >= 'a' && ch <= 'f')
	540	ch -= 'a'-10;
	541	else if (ch >= 'A' && ch <= 'F')
	542	ch -= 'A'-10;
	543	else
	544	return NULL;
	545	acc = (acc<<4) + ch;
	546	str++;
	547	}
	548
	549	if (acc > 255)
	550	return NULL;
	551	if (cnt < blen) {
	552	buf[cnt] = acc;
	553	cnt++;
	554	}
	555	if (ch == 0)
	556	break;
	557	++str;
	558	}
	559	if (cnt < blen)
	560	memset(buf+cnt, 0, blen-cnt);
	561	return buf;
	562	}
90f93024 SH	563
	564	int print_timestamp(FILE *fp)
	565	{
	566	struct timeval tv;
	567	char *tstr;
	568
	569	memset(&tv, 0, sizeof(tv));
	570	gettimeofday(&tv, NULL);
	571
	572	tstr = asctime(localtime(&tv.tv_sec));
	573	tstr[strlen(tstr)-1] = 0;
	574	fprintf(fp, "Timestamp: %s %lu usec\n", tstr, tv.tv_usec);
	575	return 0;
	576	}
351efcde SH	577
	578	int cmdlineno;
	579
	580	/* Like glibc getline but handle continuation lines and comments */
	581	size_t getcmdline(char *linep, size_t lenp, FILE *in)
	582	{
	583	size_t cc;
	584	char *cp;
	585
	586	if ((cc = getline(linep, lenp, in)) < 0)
	587	return cc; /* eof or error */
	588	++cmdlineno;
	589
	590	cp = strchr(*linep, '#');
	591	if (cp)
	592	*cp = '\0';
	593
	594	while ((cp = strstr(*linep, "\\\n")) != NULL) {
	595	char *line1 = NULL;
	596	size_t len1 = 0;
	597	size_t cc1;
	598
	599	if ((cc1 = getline(&line1, &len1, in)) < 0) {
	600	fprintf(stderr, "Missing continuation line\n");
	601	return cc1;
	602	}
	603
	604	++cmdlineno;
	605	*cp = 0;
	606
	607	cp = strchr(line1, '#');
	608	if (cp)
	609	*cp = '\0';
	610
	611	linep = realloc(linep, strlen(*linep) + strlen(line1) + 1);
	612	if (!*linep) {
	613	fprintf(stderr, "Out of memory\n");
	614	return -1;
	615	}
	616	cc += cc1 - 2;
	617	strcat(*linep, line1);
	618	free(line1);
	619	}
	620	return cc;
	621	}
	622
	623	/* split command line into argument vector */
	624	int makeargs(char line, char argv[], int maxargs)
	625	{
	626	static const char ws[] = " \t\r\n";
	627	char *cp;
	628	int argc = 0;
	629
	630	for (cp = strtok(line, ws); cp; cp = strtok(NULL, ws)) {
	631	if (argc >= (maxargs - 1)) {
	632	fprintf(stderr, "Too many arguments to command\n");
	633	exit(1);
	634	}
	635	argv[argc++] = cp;
	636	}
	637	argv[argc] = NULL;
	638
	639	return argc;
	640	}