+/*
+ * 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>
+ *
+ */
+
+#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 <errno.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 mask2bits(__u32 netmask)
+{
+ unsigned bits = 0;
+ __u32 mask = ntohl(netmask);
+ __u32 host = ~mask;
+
+ /* a valid netmask must be 2^n - 1 */
+ if ((host & (host + 1)) != 0)
+ return -1;
+
+ for (; mask; mask <<= 1)
+ ++bits;
+ return bits;
+}
+
+static int get_netmask(unsigned *val, const char *arg, int base)
+{
+ inet_prefix addr;
+
+ if (!get_unsigned(val, arg, base))
+ return 0;
+
+ /* try coverting dotted quad to CIDR */
+ if (!get_addr_1(&addr, arg, AF_INET) && addr.family == AF_INET) {
+ int b = mask2bits(addr.data[0]);
+
+ if (b >= 0) {
+ *val = b;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+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;
+}
+
+/*
+ * get_time_rtt is "translated" from a similar routine "get_time" in
+ * tc_util.c. We don't use the exact same routine because tc passes
+ * microseconds to the kernel and the callers of get_time_rtt want to
+ * pass milliseconds (standard unit for rtt values since 2.6.27), and
+ * have a different assumption for the units of a "raw" number.
+ */
+int get_time_rtt(unsigned *val, const char *arg, int *raw)
+{
+ double t;
+ unsigned long res;
+ char *p;
+
+ if (strchr(arg,'.') != NULL) {
+ t = strtod(arg,&p);
+ if (t < 0.0)
+ return -1;
+ }
+ else {
+ res = strtoul(arg, &p, 0);
+ if (res > UINT_MAX)
+ return -1;
+ t = (double)res;
+ }
+ if (p == arg)
+ return -1;
+ *raw = 1;
+
+ if (*p) {
+ *raw = 0;
+ if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 ||
+ strcasecmp(p, "secs")==0)
+ t *= 1000;
+ else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 ||
+ strcasecmp(p, "msecs") == 0)
+ t *= 1.0; /* allow suffix, do nothing */
+ else
+ return -1;
+ }
+
+ /* emulate ceil() without having to bring-in -lm and always be >= 1 */
+
+ *val = t;
+ if (*val < t)
+ *val += 1;
+
+ 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_s32(__s32 *val, const char *arg, int base)
+{
+ long res;
+ char *ptr;
+
+ errno = 0;
+
+ if (!arg || !*arg)
+ return -1;
+ res = strtol(arg, &ptr, base);
+ if (ptr == arg || *ptr ||
+ ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE) ||
+ res > INT32_MAX || res < INT32_MIN)
+ 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;
+}
+
+/* This uses a non-standard parsing (ie not inet_aton, or inet_pton)
+ * because of legacy choice to parse 10.8 as 10.8.0.0 not 10.0.0.8
+ */
+static int get_addr_ipv4(__u8 *ap, const char *cp)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ unsigned long n;
+ char *endp;
+
+ n = strtoul(cp, &endp, 0);
+ if (n > 255)
+ return -1; /* bogus network value */
+
+ if (endp == cp) /* no digits */
+ return -1;
+
+ ap[i] = n;
+
+ if (*endp == '\0')
+ break;
+
+ if (i == 3 || *endp != '.')
+ return -1; /* extra characters */
+ cp = endp + 1;
+ }
+
+ return 1;
+}
+
+int get_addr_1(inet_prefix *addr, const char *name, int family)
+{
+ 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;
+
+ if (get_addr_ipv4((__u8 *)addr->data, name) <= 0)
+ return -1;
+
+ addr->bytelen = 4;
+ addr->bitlen = -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_netmask(&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)
+{
+ const __u32 *a1 = a->data;
+ const __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;
+ const char *name;
+ inet_prefix addr;
+};
+
+#define NHASH 257
+static struct namerec *nht[NHASH];
+
+static const char *resolve_address(const void *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 = *(__u32 *)(addr + len - 4) % NHASH;
+
+ 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) {
+ const 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 */
+ssize_t getcmdline(char **linep, size_t *lenp, FILE *in)
+{
+ ssize_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;
+ ssize_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';
+
+ *lenp = strlen(*linep) + strlen(line1) + 1;
+ *linep = realloc(*linep, *lenp);
+ if (!*linep) {
+ fprintf(stderr, "Out of memory\n");
+ *lenp = 0;
+ 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;
+}
projects / lisovros / iproute2_canprio.git / blobdiff