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/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
/* stuff imported from systemd without any changes */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <net/if.h>
#include "util.h"
int safe_atou(const char *s, unsigned *ret_u) {
char *x = NULL;
unsigned long l;
assert(s);
assert(ret_u);
/* strtoul() is happy to parse negative values, and silently
* converts them to unsigned values without generating an
* error. We want a clean error, hence let's look for the "-"
* prefix on our own, and generate an error. But let's do so
* only after strtoul() validated that the string is clean
* otherwise, so that we return EINVAL preferably over
* ERANGE. */
errno = 0;
l = strtoul(s, &x, 0);
if (errno > 0)
return -errno;
if (!x || x == s || *x)
return -EINVAL;
if (s[0] == '-')
return -ERANGE;
if ((unsigned long) (unsigned) l != l)
return -ERANGE;
*ret_u = (unsigned) l;
return 0;
}
static bool socket_ipv6_is_supported(void) {
if (access("/proc/net/if_inet6", F_OK) != 0)
return false;
return true;
}
static int assign_address(const char *s,
uint16_t port,
union sockaddr_union *addr, unsigned *addr_len) {
int r;
/* IPv4 in w.x.y.z:p notation? */
r = inet_pton(AF_INET, s, &addr->in.sin_addr);
if (r < 0)
return -errno;
if (r > 0) {
/* Gotcha, it's a traditional IPv4 address */
addr->in.sin_family = AF_INET;
addr->in.sin_port = htobe16(port);
*addr_len = sizeof(struct sockaddr_in);
} else {
unsigned idx;
if (strlen(s) > IF_NAMESIZE-1)
return -EINVAL;
/* Uh, our last resort, an interface name */
idx = if_nametoindex(s);
if (idx == 0)
return -EINVAL;
addr->in6.sin6_family = AF_INET6;
addr->in6.sin6_port = htobe16(port);
addr->in6.sin6_scope_id = idx;
addr->in6.sin6_addr = in6addr_any;
*addr_len = sizeof(struct sockaddr_in6);
}
return 0;
}
int parse_sockaddr(const char *s,
union sockaddr_union *addr, unsigned *addr_len) {
char *e, *n;
unsigned u;
int r;
if (*s == '[') {
/* IPv6 in [x:.....:z]:p notation */
e = strchr(s+1, ']');
if (!e)
return -EINVAL;
n = strndupa(s+1, e-s-1);
errno = 0;
if (inet_pton(AF_INET6, n, &addr->in6.sin6_addr) <= 0)
return errno > 0 ? -errno : -EINVAL;
e++;
if (*e) {
if (*e != ':')
return -EINVAL;
e++;
r = safe_atou(e, &u);
if (r < 0)
return r;
if (u <= 0 || u > 0xFFFF)
return -EINVAL;
addr->in6.sin6_port = htobe16((uint16_t)u);
}
addr->in6.sin6_family = AF_INET6;
*addr_len = sizeof(struct sockaddr_in6);
} else {
e = strchr(s, ':');
if (e) {
r = safe_atou(e+1, &u);
if (r < 0)
return r;
if (u <= 0 || u > 0xFFFF)
return -EINVAL;
n = strndupa(s, e-s);
return assign_address(n, u, addr, addr_len);
} else {
r = safe_atou(s, &u);
if (r < 0)
return assign_address(s, 0, addr, addr_len);
/* Just a port */
if (u <= 0 || u > 0xFFFF)
return -EINVAL;
if (socket_ipv6_is_supported()) {
addr->in6.sin6_family = AF_INET6;
addr->in6.sin6_port = htobe16((uint16_t)u);
addr->in6.sin6_addr = in6addr_any;
*addr_len = sizeof(struct sockaddr_in6);
} else {
addr->in.sin_family = AF_INET;
addr->in.sin_port = htobe16((uint16_t)u);
addr->in.sin_addr.s_addr = INADDR_ANY;
*addr_len = sizeof(struct sockaddr_in);
}
}
}
return 0;
}
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