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authorLennart Poettering <lennart@poettering.net>2016-05-05 22:24:36 +0200
committerLennart Poettering <lennart@poettering.net>2016-05-05 22:24:36 +0200
commitfc2fffe7706ef269005bf4eef56570346c9ca3da (patch)
tree9e89ac76ee15de498d97b0d03ed7d764b61874ce /src/reply-password/reply-password.c
parentd8fdc62037b5b0a9fd603ad5efd6b49f956f86b5 (diff)
tree-wide: introduce new SOCKADDR_UN_LEN() macro, and use it everywhere
The macro determines the right length of a AF_UNIX "struct sockaddr_un" to pass to connect() or bind(). It automatically figures out if the socket refers to an abstract namespace socket, or a socket in the file system, and properly handles the full length of the path field. This macro is not only safer, but also simpler to use, than the usual offsetof() + strlen() logic.
Diffstat (limited to 'src/reply-password/reply-password.c')
-rw-r--r--src/reply-password/reply-password.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/src/reply-password/reply-password.c b/src/reply-password/reply-password.c
index e291758969..17eab9772e 100644
--- a/src/reply-password/reply-password.c
+++ b/src/reply-password/reply-password.c
@@ -26,14 +26,12 @@
#include "fd-util.h"
#include "log.h"
#include "macro.h"
+#include "socket-util.h"
#include "string-util.h"
#include "util.h"
static int send_on_socket(int fd, const char *socket_name, const void *packet, size_t size) {
- union {
- struct sockaddr sa;
- struct sockaddr_un un;
- } sa = {
+ union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
};
@@ -43,7 +41,7 @@ static int send_on_socket(int fd, const char *socket_name, const void *packet, s
strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
- if (sendto(fd, packet, size, MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name)) < 0)
+ if (sendto(fd, packet, size, MSG_NOSIGNAL, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0)
return log_error_errno(errno, "Failed to send: %m");
return 0;