#include <sys/stat.h>
#include <stddef.h>
#include <sys/ioctl.h>
+#include <netdb.h>
#include "macro.h"
#include "util.h"
#include "fileio.h"
int socket_address_parse(SocketAddress *a, const char *s) {
- int r;
char *e, *n;
unsigned u;
+ int r;
assert(a);
assert(s);
return -EAFNOSUPPORT;
}
- if (!(e = strchr(s+1, ']')))
+ e = strchr(s+1, ']');
+ if (!e)
return -EINVAL;
- if (!(n = strndup(s+1, e-s-1)))
- return -ENOMEM;
+ n = strndupa(s+1, e-s-1);
errno = 0;
- if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) {
- free(n);
+ if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0)
return errno > 0 ? -errno : -EINVAL;
- }
-
- free(n);
e++;
if (*e != ':')
return -EINVAL;
e++;
- if ((r = safe_atou(e, &u)) < 0)
+ r = safe_atou(e, &u);
+ if (r < 0)
return r;
if (u <= 0 || u > 0xFFFF)
a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
} else {
-
- if ((e = strchr(s, ':'))) {
-
- if ((r = safe_atou(e+1, &u)) < 0)
+ e = strchr(s, ':');
+ if (e) {
+ r = safe_atou(e+1, &u);
+ if (r < 0)
return r;
if (u <= 0 || u > 0xFFFF)
return -EINVAL;
- if (!(n = strndup(s, e-s)))
- return -ENOMEM;
+ n = strndupa(s, e-s);
/* IPv4 in w.x.y.z:p notation? */
- if ((r = inet_pton(AF_INET, n, &a->sockaddr.in4.sin_addr)) < 0) {
- free(n);
+ r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr);
+ if (r < 0)
return -errno;
- }
if (r > 0) {
/* Gotcha, it's a traditional IPv4 address */
- free(n);
-
- a->sockaddr.in4.sin_family = AF_INET;
- a->sockaddr.in4.sin_port = htons((uint16_t) u);
+ a->sockaddr.in.sin_family = AF_INET;
+ a->sockaddr.in.sin_port = htons((uint16_t) u);
a->size = sizeof(struct sockaddr_in);
} else {
unsigned idx;
- if (strlen(n) > IF_NAMESIZE-1) {
- free(n);
+ if (strlen(n) > IF_NAMESIZE-1)
return -EINVAL;
- }
/* Uh, our last resort, an interface name */
idx = if_nametoindex(n);
- free(n);
-
if (idx == 0)
return -EINVAL;
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->sockaddr.in.sin_family = AF_INET;
+ a->sockaddr.in.sin_port = htons((uint16_t) u);
+ a->sockaddr.in.sin_addr.s_addr = INADDR_ANY;
a->size = sizeof(struct sockaddr_in);
}
}
if (a->size != sizeof(struct sockaddr_in))
return -EINVAL;
- if (a->sockaddr.in4.sin_port == 0)
+ if (a->sockaddr.in.sin_port == 0)
return -EINVAL;
if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM)
char *e;
/* path */
- if (!(e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path))))
+ e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path));
+ if (!e)
return -EINVAL;
if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1)
}
}
-int socket_address_print(const SocketAddress *a, char **p) {
+int socket_address_print(const SocketAddress *a, char **ret) {
int r;
+
assert(a);
- assert(p);
+ assert(ret);
- if ((r = socket_address_verify(a)) < 0)
+ r = socket_address_verify(a);
+ if (r < 0)
return r;
- switch (socket_address_family(a)) {
-
- case AF_INET: {
- char *ret;
-
- if (!(ret = new(char, INET_ADDRSTRLEN+1+5+1)))
- return -ENOMEM;
-
- if (!inet_ntop(AF_INET, &a->sockaddr.in4.sin_addr, ret, INET_ADDRSTRLEN)) {
- free(ret);
- return -errno;
- }
-
- sprintf(strchr(ret, 0), ":%u", ntohs(a->sockaddr.in4.sin_port));
- *p = ret;
- return 0;
- }
-
- case AF_INET6: {
- char *ret;
-
- if (!(ret = new(char, 1+INET6_ADDRSTRLEN+2+5+1)))
- return -ENOMEM;
-
- ret[0] = '[';
- if (!inet_ntop(AF_INET6, &a->sockaddr.in6.sin6_addr, ret+1, INET6_ADDRSTRLEN)) {
- free(ret);
- return -errno;
- }
-
- sprintf(strchr(ret, 0), "]:%u", ntohs(a->sockaddr.in6.sin6_port));
- *p = ret;
- return 0;
- }
-
- case AF_UNIX: {
- char *ret;
-
- if (a->size <= offsetof(struct sockaddr_un, sun_path)) {
-
- if (!(ret = strdup("<unnamed>")))
- return -ENOMEM;
-
- } else if (a->sockaddr.un.sun_path[0] == 0) {
- /* abstract */
-
- /* FIXME: We assume we can print the
- * socket path here and that it hasn't
- * more than one NUL byte. That is
- * actually an invalid assumption */
-
- if (!(ret = new(char, sizeof(a->sockaddr.un.sun_path)+1)))
- return -ENOMEM;
-
- ret[0] = '@';
- memcpy(ret+1, a->sockaddr.un.sun_path+1, sizeof(a->sockaddr.un.sun_path)-1);
- ret[sizeof(a->sockaddr.un.sun_path)] = 0;
-
- } else {
-
- if (!(ret = strdup(a->sockaddr.un.sun_path)))
- return -ENOMEM;
- }
-
- *p = ret;
- return 0;
- }
-
- case AF_NETLINK: {
+ if (socket_address_family(a) == AF_NETLINK) {
_cleanup_free_ char *sfamily = NULL;
r = netlink_family_to_string_alloc(a->protocol, &sfamily);
if (r < 0)
return r;
- r = asprintf(p, "%s %u", sfamily, a->sockaddr.nl.nl_groups);
+
+ r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups);
if (r < 0)
return -ENOMEM;
return 0;
}
- default:
- return -EINVAL;
- }
+ return sockaddr_pretty(&a->sockaddr.sa, a->size, false, ret);
}
bool socket_address_can_accept(const SocketAddress *a) {
if (a->type != b->type)
return false;
- if (a->size != b->size)
- return false;
-
if (socket_address_family(a) != socket_address_family(b))
return false;
switch (socket_address_family(a)) {
case AF_INET:
- if (a->sockaddr.in4.sin_addr.s_addr != b->sockaddr.in4.sin_addr.s_addr)
+ if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr)
return false;
- if (a->sockaddr.in4.sin_port != b->sockaddr.in4.sin_port)
+ if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port)
return false;
break;
break;
case AF_UNIX:
-
if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0))
return false;
if (a->sockaddr.un.sun_path[0]) {
- if (!strneq(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, sizeof(a->sockaddr.un.sun_path)))
+ if (!path_equal_or_files_same(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path))
return false;
} else {
+ if (a->size != b->size)
+ return false;
+
if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0)
return false;
}
break;
case AF_NETLINK:
-
if (a->protocol != b->protocol)
return false;
}
bool socket_ipv6_is_supported(void) {
- char *l = 0;
- bool enabled;
+ _cleanup_free_ char *l = NULL;
if (access("/sys/module/ipv6", F_OK) != 0)
- return 0;
+ return false;
/* If we can't check "disable" parameter, assume enabled */
if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0)
- return 1;
+ return true;
/* If module was loaded with disable=1 no IPv6 available */
- enabled = l[0] == '0';
- free(l);
-
- return enabled;
+ return l[0] == '0';
}
bool socket_address_matches_fd(const SocketAddress *a, int fd) {
- union sockaddr_union sa;
- socklen_t salen = sizeof(sa), solen;
- int protocol, type;
+ SocketAddress b;
+ socklen_t solen;
assert(a);
assert(fd >= 0);
- if (getsockname(fd, &sa.sa, &salen) < 0)
+ b.size = sizeof(b.sockaddr);
+ if (getsockname(fd, &b.sockaddr.sa, &b.size) < 0)
return false;
- if (sa.sa.sa_family != a->sockaddr.sa.sa_family)
+ if (b.sockaddr.sa.sa_family != a->sockaddr.sa.sa_family)
return false;
- solen = sizeof(type);
- if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &solen) < 0)
+ solen = sizeof(b.type);
+ if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &b.type, &solen) < 0)
return false;
- if (type != a->type)
+ if (b.type != a->type)
return false;
if (a->protocol != 0) {
- solen = sizeof(protocol);
- if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &protocol, &solen) < 0)
+ solen = sizeof(b.protocol);
+ if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &b.protocol, &solen) < 0)
return false;
- if (protocol != a->protocol)
+ if (b.protocol != a->protocol)
return false;
}
- switch (sa.sa.sa_family) {
+ return socket_address_equal(a, &b);
+}
- case AF_INET:
- return sa.in4.sin_port == a->sockaddr.in4.sin_port &&
- sa.in4.sin_addr.s_addr == a->sockaddr.in4.sin_addr.s_addr;
+int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, char **ret) {
+ union sockaddr_union *sa = (union sockaddr_union*) _sa;
+ char *p;
- case AF_INET6:
- return sa.in6.sin6_port == a->sockaddr.in6.sin6_port &&
- memcmp(&sa.in6.sin6_addr, &a->sockaddr.in6.sin6_addr, sizeof(struct in6_addr)) == 0;
+ assert(sa);
+ assert(salen >= sizeof(sa->sa.sa_family));
+
+ switch (sa->sa.sa_family) {
+
+ case AF_INET: {
+ uint32_t a;
+
+ a = ntohl(sa->in.sin_addr.s_addr);
+
+ if (asprintf(&p,
+ "%u.%u.%u.%u:%u",
+ a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
+ ntohs(sa->in.sin_port)) < 0)
+ return -ENOMEM;
+
+ break;
+ }
+
+ case AF_INET6: {
+ static const unsigned char ipv4_prefix[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
+ };
+
+ if (translate_ipv6 && memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
+ const uint8_t *a = sa->in6.sin6_addr.s6_addr+12;
+
+ if (asprintf(&p,
+ "%u.%u.%u.%u:%u",
+ a[0], a[1], a[2], a[3],
+ ntohs(sa->in6.sin6_port)) < 0)
+ return -ENOMEM;
+ } else {
+ char a[INET6_ADDRSTRLEN];
+
+ if (asprintf(&p,
+ "[%s]:%u",
+ inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a)),
+ ntohs(sa->in6.sin6_port)) < 0)
+ return -ENOMEM;
+ }
+
+ break;
+ }
case AF_UNIX:
- return salen == a->size &&
- memcmp(sa.un.sun_path, a->sockaddr.un.sun_path, salen - offsetof(struct sockaddr_un, sun_path)) == 0;
+ if (salen <= offsetof(struct sockaddr_un, sun_path)) {
+ p = strdup("<unnamed>");
+ if (!p)
+ return -ENOMEM;
+
+ } else if (sa->un.sun_path[0] == 0) {
+ /* abstract */
+
+ /* FIXME: We assume we can print the
+ * socket path here and that it hasn't
+ * more than one NUL byte. That is
+ * actually an invalid assumption */
+ p = new(char, sizeof(sa->un.sun_path)+1);
+ if (!p)
+ return -ENOMEM;
+
+ p[0] = '@';
+ memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1);
+ p[sizeof(sa->un.sun_path)] = 0;
+
+ } else {
+ p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path));
+ if (!ret)
+ return -ENOMEM;
+ }
+
+ break;
+
+ default:
+ return -ENOTSUP;
}
- return false;
+
+ *ret = p;
+ return 0;
}
-int make_socket_fd(const char* address, int flags) {
- SocketAddress a;
- int fd, r;
- _cleanup_free_ char *p = NULL;
+int getpeername_pretty(int fd, char **ret) {
+ union sockaddr_union sa;
+ socklen_t salen = sizeof(sa);
+ int r;
- r = socket_address_parse(&a, address);
- if (r < 0) {
- log_error("failed to parse socket: %s", strerror(-r));
- return r;
- }
+ assert(fd >= 0);
+ assert(ret);
- fd = socket(socket_address_family(&a), flags, 0);
- if (fd < 0) {
- log_error("socket(): %m");
+ if (getpeername(fd, &sa.sa, &salen) < 0)
return -errno;
- }
- r = socket_address_print(&a, &p);
- if (r < 0) {
- log_error("socket_address_print(): %s", strerror(-r));
- return r;
+ if (sa.sa.sa_family == AF_UNIX) {
+ struct ucred ucred = {};
+
+ /* UNIX connection sockets are anonymous, so let's use
+ * PID/UID as pretty credentials instead */
+
+ r = getpeercred(fd, &ucred);
+ if (r < 0)
+ return r;
+
+ if (asprintf(ret, "PID "PID_FMT"/UID "UID_FMT, ucred.pid, ucred.uid) < 0)
+ return -ENOMEM;
+
+ return 0;
}
- log_info("Listening on %s", p);
- r = bind(fd, &a.sockaddr.sa, a.size);
- if (r < 0) {
- log_error("bind to %s: %m", address);
+ /* For remote sockets we translate IPv6 addresses back to IPv4
+ * if applicable, since that's nicer. */
+
+ return sockaddr_pretty(&sa.sa, salen, true, ret);
+}
+
+int getsockname_pretty(int fd, char **ret) {
+ union sockaddr_union sa;
+ socklen_t salen = sizeof(sa);
+
+ assert(fd >= 0);
+ assert(ret);
+
+ if (getsockname(fd, &sa.sa, &salen) < 0)
return -errno;
+
+ /* For local sockets we do not translate IPv6 addresses back
+ * to IPv6 if applicable, since this is usually used for
+ * listening sockets where the difference between IPv4 and
+ * IPv6 matters. */
+
+ return sockaddr_pretty(&sa.sa, salen, false, ret);
+}
+
+int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret) {
+ int r;
+ char host[NI_MAXHOST], *ret;
+
+ assert(_ret);
+
+ r = getnameinfo(&sa->sa, salen, host, sizeof(host), NULL, 0,
+ NI_IDN|NI_IDN_USE_STD3_ASCII_RULES);
+ if (r != 0) {
+ int saved_errno = errno;
+
+ r = sockaddr_pretty(&sa->sa, salen, true, &ret);
+ if (r < 0)
+ return log_error_errno(r, "sockadd_pretty() failed: %m");
+
+ log_debug_errno(saved_errno, "getnameinfo(%s) failed: %m", ret);
+ } else {
+ ret = strdup(host);
+ if (!ret)
+ return log_oom();
}
- r = listen(fd, SOMAXCONN);
- if (r < 0) {
- log_error("listen on %s: %m", address);
+ *_ret = ret;
+ return 0;
+}
+
+int getnameinfo_pretty(int fd, char **ret) {
+ union sockaddr_union sa;
+ socklen_t salen = sizeof(sa);
+
+ assert(fd >= 0);
+ assert(ret);
+
+ if (getsockname(fd, &sa.sa, &salen) < 0)
+ return log_error_errno(errno, "getsockname(%d) failed: %m", fd);
+
+ return socknameinfo_pretty(&sa, salen, ret);
+}
+
+int socket_address_unlink(SocketAddress *a) {
+ assert(a);
+
+ if (socket_address_family(a) != AF_UNIX)
+ return 0;
+
+ if (a->sockaddr.un.sun_path[0] == 0)
+ return 0;
+
+ if (unlink(a->sockaddr.un.sun_path) < 0)
return -errno;
- }
- return fd;
+ return 1;
}
static const char* const netlink_family_table[] = {
};
DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only);
+
+bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b) {
+ assert(a);
+ assert(b);
+
+ if (a->sa.sa_family != b->sa.sa_family)
+ return false;
+
+ if (a->sa.sa_family == AF_INET)
+ return a->in.sin_addr.s_addr == b->in.sin_addr.s_addr;
+
+ if (a->sa.sa_family == AF_INET6)
+ return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr)) == 0;
+
+ return false;
+}
+
+char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]) {
+ assert(addr);
+ assert(buffer);
+
+ /* Like ether_ntoa() but uses %02x instead of %x to print
+ * ethernet addresses, which makes them look less funny. Also,
+ * doesn't use a static buffer. */
+
+ sprintf(buffer, "%02x:%02x:%02x:%02x:%02x:%02x",
+ addr->ether_addr_octet[0],
+ addr->ether_addr_octet[1],
+ addr->ether_addr_octet[2],
+ addr->ether_addr_octet[3],
+ addr->ether_addr_octet[4],
+ addr->ether_addr_octet[5]);
+
+ return buffer;
+}
~ianmdlvl / elogind.git / blobdiff