-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
#include <net/if.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <stddef.h>
+#include <sys/ioctl.h>
#include "macro.h"
#include "util.h"
#include "socket-util.h"
+#include "missing.h"
+#include "label.h"
int socket_address_parse(SocketAddress *a, const char *s) {
int r;
if (*s == '[') {
/* IPv6 in [x:.....:z]:p notation */
+ if (!socket_ipv6_is_supported()) {
+ log_warning("Binding to IPv6 address not available since kernel does not support IPv6.");
+ return -EAFNOSUPPORT;
+ }
+
if (!(e = strchr(s+1, ']')))
return -EINVAL;
a->sockaddr.un.sun_family = AF_UNIX;
memcpy(a->sockaddr.un.sun_path, s, l);
- a->size = sizeof(sa_family_t) + l + 1;
+ a->size = offsetof(struct sockaddr_un, sun_path) + l + 1;
} else if (*s == '@') {
/* Abstract AF_UNIX socket */
a->sockaddr.un.sun_family = AF_UNIX;
memcpy(a->sockaddr.un.sun_path+1, s+1, l);
- a->size = sizeof(struct sockaddr_un);
+ a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
} else {
if (idx == 0)
return -EINVAL;
+ if (!socket_ipv6_is_supported()) {
+ log_warning("Binding to interface is not available since kernel does not support IPv6.");
+ return -EAFNOSUPPORT;
+ }
+
a->sockaddr.in6.sin6_family = AF_INET6;
a->sockaddr.in6.sin6_port = htons((uint16_t) u);
a->sockaddr.in6.sin6_scope_id = idx;
a->sockaddr.in6.sin6_addr = in6addr_any;
a->size = sizeof(struct sockaddr_in6);
-
}
} else {
if (u <= 0 || u > 0xFFFF)
return -EINVAL;
- a->sockaddr.in6.sin6_family = AF_INET6;
- a->sockaddr.in6.sin6_port = htons((uint16_t) u);
- a->sockaddr.in6.sin6_addr = in6addr_any;
- a->size = sizeof(struct sockaddr_in6);
+ if (socket_ipv6_is_supported()) {
+ a->sockaddr.in6.sin6_family = AF_INET6;
+ a->sockaddr.in6.sin6_port = htons((uint16_t) u);
+ a->sockaddr.in6.sin6_addr = in6addr_any;
+ a->size = sizeof(struct sockaddr_in6);
+ } else {
+ a->sockaddr.in4.sin_family = AF_INET;
+ a->sockaddr.in4.sin_port = htons((uint16_t) u);
+ a->sockaddr.in4.sin_addr.s_addr = INADDR_ANY;
+ a->size = sizeof(struct sockaddr_in);
+ }
}
}
return 0;
case AF_UNIX:
- if (a->size < sizeof(sa_family_t))
+ if (a->size < offsetof(struct sockaddr_un, sun_path))
return -EINVAL;
- if (a->size > sizeof(sa_family_t)) {
+ if (a->size > offsetof(struct sockaddr_un, sun_path)) {
- if (a->sockaddr.un.sun_path[0] == 0) {
- /* abstract */
- if (a->size != sizeof(struct sockaddr_un))
- return -EINVAL;
- } else {
+ if (a->sockaddr.un.sun_path[0] != 0) {
char *e;
/* path */
if (!(e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path))))
return -EINVAL;
- if (a->size != sizeof(sa_family_t) + (e - a->sockaddr.un.sun_path) + 1)
+ if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1)
return -EINVAL;
}
}
case AF_UNIX: {
char *ret;
- if (a->size <= sizeof(sa_family_t)) {
+ if (a->size <= offsetof(struct sockaddr_un, sun_path)) {
if (!(ret = strdup("<unamed>")))
return -ENOMEM;
int backlog,
SocketAddressBindIPv6Only only,
const char *bind_to_device,
+ bool free_bind,
mode_t directory_mode,
mode_t socket_mode,
+ const char *label,
int *ret) {
int r, fd, one;
if ((r = socket_address_verify(a)) < 0)
return r;
- if ((fd = socket(socket_address_family(a), a->type | SOCK_NONBLOCK | SOCK_CLOEXEC, 0)) < 0)
- return -errno;
+ if (socket_address_family(a) == AF_INET6 && !socket_ipv6_is_supported())
+ return -EAFNOSUPPORT;
+
+ r = label_socket_set(label);
+ if (r < 0)
+ return r;
+
+ fd = socket(socket_address_family(a), a->type | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
+ r = fd < 0 ? -errno : 0;
+
+ label_socket_clear();
+
+ if (r < 0)
+ return r;
if (socket_address_family(a) == AF_INET6 && only != SOCKET_ADDRESS_DEFAULT) {
int flag = only == SOCKET_ADDRESS_IPV6_ONLY;
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, bind_to_device, strlen(bind_to_device)+1) < 0)
goto fail;
+ if (free_bind) {
+ one = 1;
+ if (setsockopt(fd, IPPROTO_IP, IP_FREEBIND, &one, sizeof(one)) < 0)
+ log_warning("IP_FREEBIND failed: %m");
+ }
+
one = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
goto fail;
if (strncmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, sizeof(a->sockaddr.un.sun_path)) != 0)
return false;
} else {
- if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, sizeof(a->sockaddr.un.sun_path)) != 0)
+ if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0)
return false;
}
return true;
}
-bool socket_address_is(const SocketAddress *a, const char *s) {
+bool socket_address_is(const SocketAddress *a, const char *s, int type) {
struct SocketAddress b;
assert(a);
if (socket_address_parse(&b, s) < 0)
return false;
+ b.type = type;
+
return socket_address_equal(a, &b);
}
return path_startswith(a->sockaddr.un.sun_path, prefix);
}
+
+bool socket_ipv6_is_supported(void) {
+ return access("/sys/module/ipv6", F_OK) == 0;
+}
+
+static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = {
+ [SOCKET_ADDRESS_DEFAULT] = "default",
+ [SOCKET_ADDRESS_BOTH] = "both",
+ [SOCKET_ADDRESS_IPV6_ONLY] = "ipv6-only"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only);