aboutsummaryrefslogtreecommitdiff
path: root/lib/utils.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/utils.c')
-rw-r--r--lib/utils.c361
1 files changed, 302 insertions, 59 deletions
diff --git a/lib/utils.c b/lib/utils.c
index 46a20de7..01d2f4c8 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -20,6 +20,7 @@
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
+#include <ctype.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <asm/types.h>
@@ -35,7 +36,20 @@
#include "utils.h"
#include "namespace.h"
-int timestamp_short = 0;
+int resolve_hosts;
+int timestamp_short;
+
+int get_hex(char c)
+{
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+ if (c >= '0' && c <= '9')
+ return c - '0';
+
+ return -1;
+}
int get_integer(int *val, const char *arg, int base)
{
@@ -48,7 +62,7 @@ int get_integer(int *val, const char *arg, int base)
res = strtol(arg, &ptr, base);
/* If there were no digits at all, strtol() stores
- * the original value of nptr in *endptr (and returns 0).
+ * the original value of nptr in *endptr (and returns 0).
* In particular, if *nptr is not '\0' but **endptr is '\0' on return,
* the entire string is valid.
*/
@@ -72,7 +86,7 @@ int get_integer(int *val, const char *arg, int base)
int mask2bits(__u32 netmask)
{
- unsigned bits = 0;
+ unsigned int bits = 0;
__u32 mask = ntohl(netmask);
__u32 host = ~mask;
@@ -85,7 +99,7 @@ int mask2bits(__u32 netmask)
return bits;
}
-static int get_netmask(unsigned *val, const char *arg, int base)
+static int get_netmask(unsigned int *val, const char *arg, int base)
{
inet_prefix addr;
@@ -95,7 +109,7 @@ static int get_netmask(unsigned *val, const char *arg, int base)
/* 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;
@@ -105,7 +119,7 @@ static int get_netmask(unsigned *val, const char *arg, int base)
return -1;
}
-int get_unsigned(unsigned *val, const char *arg, int base)
+int get_unsigned(unsigned int *val, const char *arg, int base)
{
unsigned long res;
char *ptr;
@@ -138,7 +152,7 @@ int get_unsigned(unsigned *val, const char *arg, int base)
* 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)
+int get_time_rtt(unsigned int *val, const char *arg, int *raw)
{
double t;
unsigned long res;
@@ -176,23 +190,24 @@ int get_time_rtt(unsigned *val, const char *arg, int *raw)
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)
+ 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;
- }
+ else
+ return -1;
+ }
/* emulate ceil() without having to bring-in -lm and always be >= 1 */
-
*val = t;
if (*val < t)
*val += 1;
-
- return 0;
+
+ return 0;
}
@@ -218,8 +233,8 @@ int get_u64(__u64 *val, const char *arg, int base)
if (res > 0xFFFFFFFFFFFFFFFFULL)
return -1;
- *val = res;
- return 0;
+ *val = res;
+ return 0;
}
int get_u32(__u32 *val, const char *arg, int base)
@@ -353,6 +368,39 @@ int get_s8(__s8 *val, const char *arg, int base)
return 0;
}
+int get_be64(__be64 *val, const char *arg, int base)
+{
+ __u64 v;
+ int ret = get_u64(&v, arg, base);
+
+ if (!ret)
+ *val = htonll(v);
+
+ return ret;
+}
+
+int get_be32(__be32 *val, const char *arg, int base)
+{
+ __u32 v;
+ int ret = get_u32(&v, arg, base);
+
+ if (!ret)
+ *val = htonl(v);
+
+ return ret;
+}
+
+int get_be16(__be16 *val, const char *arg, int base)
+{
+ __u16 v;
+ int ret = get_u16(&v, arg, base);
+
+ if (!ret)
+ *val = htons(v);
+
+ return ret;
+}
+
/* 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
*/
@@ -363,7 +411,7 @@ static int get_addr_ipv4(__u8 *ap, const char *cp)
for (i = 0; i < 4; i++) {
unsigned long n;
char *endp;
-
+
n = strtoul(cp, &endp, 0);
if (n > 255)
return -1; /* bogus network value */
@@ -377,7 +425,7 @@ static int get_addr_ipv4(__u8 *ap, const char *cp)
break;
if (i == 3 || *endp != '.')
- return -1; /* extra characters */
+ return -1; /* extra characters */
cp = endp + 1;
}
@@ -436,7 +484,9 @@ int get_addr_1(inet_prefix *addr, const char *name, int family)
if (family == AF_PACKET) {
int len;
- len = ll_addr_a2n((char *)&addr->data, sizeof(addr->data), name);
+
+ len = ll_addr_a2n((char *) &addr->data, sizeof(addr->data),
+ name);
if (len < 0)
return -1;
@@ -460,6 +510,7 @@ int get_addr_1(inet_prefix *addr, const char *name, int family)
#ifndef ANDROID
if (family == AF_DECnet) {
struct dn_naddr dna;
+
addr->family = AF_DECnet;
if (dnet_pton(AF_DECnet, name, &dna) <= 0)
return -1;
@@ -471,14 +522,18 @@ int get_addr_1(inet_prefix *addr, const char *name, int family)
#endif
if (family == AF_MPLS) {
+ unsigned int maxlabels;
int i;
+
addr->family = AF_MPLS;
- if (mpls_pton(AF_MPLS, name, addr->data) <= 0)
+ if (mpls_pton(AF_MPLS, name, addr->data,
+ sizeof(addr->data)) <= 0)
return -1;
addr->bytelen = 4;
addr->bitlen = 20;
/* How many bytes do I need? */
- for (i = 0; i < 8; i++) {
+ maxlabels = sizeof(addr->data) / sizeof(struct mpls_label);
+ for (i = 0; i < maxlabels; i++) {
if (ntohl(addr->data[i]) & MPLS_LS_S_MASK) {
addr->bytelen = (i + 1)*4;
break;
@@ -525,7 +580,7 @@ int af_byte_len(int af)
int get_prefix_1(inet_prefix *dst, char *arg, int family)
{
int err;
- unsigned plen;
+ unsigned int plen;
char *slash;
memset(dst, 0, sizeof(*dst));
@@ -565,11 +620,19 @@ done:
return err;
}
+static const char *family_name_verbose(int family)
+{
+ if (family == AF_UNSPEC)
+ return "any valid";
+ return family_name(family);
+}
+
int get_addr(inet_prefix *dst, const char *arg, int family)
{
if (get_addr_1(dst, arg, family)) {
- fprintf(stderr, "Error: %s address is expected rather than \"%s\".\n",
- family_name(family) ,arg);
+ fprintf(stderr,
+ "Error: %s address is expected rather than \"%s\".\n",
+ family_name_verbose(family), arg);
exit(1);
}
return 0;
@@ -578,12 +641,16 @@ int get_addr(inet_prefix *dst, const char *arg, int family)
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);
+ 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: %s prefix is expected rather than \"%s\".\n",
- family_name(family) ,arg);
+ fprintf(stderr,
+ "Error: %s prefix is expected rather than \"%s\".\n",
+ family_name_verbose(family), arg);
exit(1);
}
return 0;
@@ -592,8 +659,11 @@ int get_prefix(inet_prefix *dst, char *arg, int family)
__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);
+ fprintf(stderr,
+ "Error: an IP address is expected rather than \"%s\"\n",
+ name);
exit(1);
}
return addr.data[0];
@@ -619,19 +689,52 @@ void invarg(const char *msg, const char *arg)
void duparg(const char *key, const char *arg)
{
- fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, 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);
+ fprintf(stderr,
+ "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n",
+ key, arg);
exit(-1);
}
+int check_ifname(const char *name)
+{
+ /* These checks mimic kernel checks in dev_valid_name */
+ if (*name == '\0')
+ return -1;
+ if (strlen(name) >= IFNAMSIZ)
+ return -1;
+
+ while (*name) {
+ if (*name == '/' || isspace(*name))
+ return -1;
+ ++name;
+ }
+ return 0;
+}
+
+/* buf is assumed to be IFNAMSIZ */
+int get_ifname(char *buf, const char *name)
+{
+ int ret;
+
+ ret = check_ifname(name);
+ if (ret == 0)
+ strncpy(buf, name, IFNAMSIZ);
+
+ return ret;
+}
+
int matches(const char *cmd, const char *pattern)
{
int len = strlen(cmd);
+
if (len > strlen(pattern))
return -1;
return memcmp(pattern, cmd, len);
@@ -676,17 +779,20 @@ int __get_hz(void)
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 {
+ 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;
+ unsigned int nom, denom;
+
if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2)
if (nom == 1000000)
hz = denom;
@@ -704,7 +810,8 @@ 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)
+const char *rt_addr_n2a_r(int af, int len,
+ const void *addr, char *buf, int buflen)
{
switch (af) {
case AF_INET:
@@ -717,7 +824,8 @@ const char *rt_addr_n2a(int af, int len, const void *addr, char *buf, int buflen
return ipx_ntop(af, addr, buf, buflen);
case AF_DECnet:
{
- struct dn_naddr dna = { 2, { 0, 0, }};
+ struct dn_naddr dna = { 2, { 0, 0, } };
+
memcpy(dna.a_addr, addr, 2);
return dnet_ntop(af, &dna, buf, buflen);
}
@@ -729,9 +837,17 @@ const char *rt_addr_n2a(int af, int len, const void *addr, char *buf, int buflen
}
}
+const char *rt_addr_n2a(int af, int len, const void *addr)
+{
+ static char buf[256];
+
+ return rt_addr_n2a_r(af, len, addr, buf, 256);
+}
+
int read_family(const char *name)
{
int family = AF_UNSPEC;
+
if (strcmp(name, "inet") == 0)
family = AF_INET;
else if (strcmp(name, "inet6") == 0)
@@ -769,8 +885,7 @@ const char *family_name(int family)
}
#ifdef RESOLVE_HOSTNAMES
-struct namerec
-{
+struct namerec {
struct namerec *next;
const char *name;
inet_prefix addr;
@@ -783,12 +898,12 @@ static const char *resolve_address(const void *addr, int len, int af)
{
struct namerec *n;
struct hostent *h_ent;
- unsigned hash;
+ unsigned int hash;
static int notfirst;
- if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
- ((__u32*)addr)[1] == 0 && ((__u32*)addr)[2] == htonl(0xffff)) {
+ if (af == AF_INET6 && ((__u32 *)addr)[0] == 0 &&
+ ((__u32 *)addr)[1] == 0 && ((__u32 *)addr)[2] == htonl(0xffff)) {
af = AF_INET;
addr += 12;
len = 4;
@@ -802,7 +917,8 @@ static const char *resolve_address(const void *addr, int len, int af)
memcmp(n->addr.data, addr, len) == 0)
return n->name;
}
- if ((n = malloc(sizeof(*n))) == NULL)
+ n = malloc(sizeof(*n));
+ if (n == NULL)
return NULL;
n->addr.family = af;
n->addr.bytelen = len;
@@ -814,7 +930,8 @@ static const char *resolve_address(const void *addr, int len, int af)
sethostent(1);
fflush(stdout);
- if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
+ h_ent = gethostbyaddr(addr, len, af);
+ if (h_ent != NULL)
n->name = strdup(h_ent->h_name);
/* Even if we fail, "negative" entry is remembered. */
@@ -822,7 +939,7 @@ static const char *resolve_address(const void *addr, int len, int af)
}
#endif
-const char *format_host(int af, int len, const void *addr,
+const char *format_host_r(int af, int len, const void *addr,
char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES
@@ -836,7 +953,14 @@ const char *format_host(int af, int len, const void *addr,
return n;
}
#endif
- return rt_addr_n2a(af, len, addr, buf, buflen);
+ return rt_addr_n2a_r(af, len, addr, buf, buflen);
+}
+
+const char *format_host(int af, int len, const void *addr)
+{
+ static char buf[256];
+
+ return format_host_r(af, len, addr, buf, 256);
}
@@ -845,7 +969,7 @@ char *hexstring_n2a(const __u8 *str, int len, char *buf, int blen)
char *ptr = buf;
int i;
- for (i=0; i<len; i++) {
+ for (i = 0; i < len; i++) {
if (blen < 3)
break;
sprintf(ptr, "%02x", str[i]);
@@ -855,9 +979,9 @@ char *hexstring_n2a(const __u8 *str, int len, char *buf, int blen)
return buf;
}
-__u8* hexstring_a2n(const char *str, __u8 *buf, int blen)
+__u8 *hexstring_a2n(const char *str, __u8 *buf, int blen, unsigned int *len)
{
- int cnt = 0;
+ unsigned int cnt = 0;
char *endptr;
if (strlen(str) % 2)
@@ -868,15 +992,42 @@ __u8* hexstring_a2n(const char *str, __u8 *buf, int blen)
strncpy(tmpstr, str, 2);
tmpstr[2] = '\0';
+ errno = 0;
tmp = strtoul(tmpstr, &endptr, 16);
if (errno != 0 || tmp > 0xFF || *endptr != '\0')
return NULL;
buf[cnt++] = tmp;
str += 2;
}
+
+ if (len)
+ *len = cnt;
+
return buf;
}
+int hex2mem(const char *buf, uint8_t *mem, int count)
+{
+ int i, j;
+ int c;
+
+ for (i = 0, j = 0; i < count; i++, j += 2) {
+ c = get_hex(buf[j]);
+ if (c < 0)
+ return -1;
+
+ mem[i] = c << 4;
+
+ c = get_hex(buf[j + 1]);
+ if (c < 0)
+ return -1;
+
+ mem[i] |= c;
+ }
+
+ return 0;
+}
+
int addr64_n2a(__u64 addr, char *buff, size_t len)
{
__u16 *words = (__u16 *)&addr;
@@ -901,6 +1052,20 @@ int addr64_n2a(__u64 addr, char *buff, size_t len)
return written;
}
+/* Print buffer and escape bytes that are !isprint or among 'escape' */
+void print_escape_buf(const __u8 *buf, size_t len, const char *escape)
+{
+ size_t i;
+
+ for (i = 0; i < len; ++i) {
+ if (isprint(buf[i]) && buf[i] != '\\' &&
+ !strchr(escape, buf[i]))
+ printf("%c", buf[i]);
+ else
+ printf("\\%03o", buf[i]);
+ }
+}
+
int print_timestamp(FILE *fp)
{
struct timeval tv;
@@ -933,7 +1098,8 @@ ssize_t getcmdline(char **linep, size_t *lenp, FILE *in)
ssize_t cc;
char *cp;
- if ((cc = getline(linep, lenp, in)) < 0)
+ cc = getline(linep, lenp, in);
+ if (cc < 0)
return cc; /* eof or error */
++cmdlineno;
@@ -946,7 +1112,8 @@ ssize_t getcmdline(char **linep, size_t *lenp, FILE *in)
size_t len1 = 0;
ssize_t cc1;
- if ((cc1 = getline(&line1, &len1, in)) < 0) {
+ cc1 = getline(&line1, &len1, in);
+ if (cc1 < 0) {
fprintf(stderr, "Missing continuation line\n");
return cc1;
}
@@ -1021,8 +1188,9 @@ int inet_get_addr(const char *src, __u32 *dst, struct in6_addr *dst6)
void print_nlmsg_timestamp(FILE *fp, const struct nlmsghdr *n)
{
char *tstr;
- time_t secs = ((__u32*)NLMSG_DATA(n))[0];
- long usecs = ((__u32*)NLMSG_DATA(n))[1];
+ time_t secs = ((__u32 *)NLMSG_DATA(n))[0];
+ long usecs = ((__u32 *)NLMSG_DATA(n))[1];
+
tstr = asctime(localtime(&secs));
tstr[strlen(tstr)-1] = 0;
fprintf(fp, "Timestamp: %s %lu us\n", tstr, usecs);
@@ -1060,3 +1228,78 @@ char *int_to_str(int val, char *buf)
sprintf(buf, "%d", val);
return buf;
}
+
+int get_guid(__u64 *guid, const char *arg)
+{
+ unsigned long int tmp;
+ char *endptr;
+ int i;
+
+#define GUID_STR_LEN 23
+ /* Verify strict format: format string must be
+ * xx:xx:xx:xx:xx:xx:xx:xx where xx can be an arbitrary
+ * hex digit
+ */
+
+ if (strlen(arg) != GUID_STR_LEN)
+ return -1;
+
+ /* make sure columns are in place */
+ for (i = 0; i < 7; i++)
+ if (arg[2 + i * 3] != ':')
+ return -1;
+
+ *guid = 0;
+ for (i = 0; i < 8; i++) {
+ tmp = strtoul(arg + i * 3, &endptr, 16);
+ if (endptr != arg + i * 3 + 2)
+ return -1;
+
+ if (tmp > 255)
+ return -1;
+
+ *guid |= tmp << (56 - 8 * i);
+ }
+
+ return 0;
+}
+
+/* This is a necessary workaround for multicast route dumps */
+int get_real_family(int rtm_type, int rtm_family)
+{
+ if (rtm_type != RTN_MULTICAST)
+ return rtm_family;
+
+ if (rtm_family == RTNL_FAMILY_IPMR)
+ return AF_INET;
+
+ if (rtm_family == RTNL_FAMILY_IP6MR)
+ return AF_INET6;
+
+ return rtm_family;
+}
+
+#ifdef NEED_STRLCPY
+size_t strlcpy(char *dst, const char *src, size_t size)
+{
+ size_t srclen = strlen(src);
+
+ if (size) {
+ size_t minlen = min(srclen, size - 1);
+
+ memcpy(dst, src, minlen);
+ dst[minlen] = '\0';
+ }
+ return srclen;
+}
+
+size_t strlcat(char *dst, const char *src, size_t size)
+{
+ size_t dlen = strlen(dst);
+
+ if (dlen >= size)
+ return dlen + strlen(src);
+
+ return dlen + strlcpy(dst + dlen, src, size - dlen);
+}
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-13 04:44:14 +0000