# HG changeset patch
# User František Kučera <franta-hg@frantovo.cz>
# Date 1479594587 -3600
# Node ID 6ec32ee08feb8e438fe3266ced698fb5627b8edd
# Parent  0a06481eec13142df6f6493aa4803b374a427b64
libevent: print_socket_info() -- vypíše pid, uid, gid

diff -r 0a06481eec13 -r 6ec32ee08feb c++/domain-socket-bridge/domain-socket-bridge.c
--- a/c++/domain-socket-bridge/domain-socket-bridge.c	Sat Nov 19 22:30:02 2016 +0100
+++ b/c++/domain-socket-bridge/domain-socket-bridge.c	Sat Nov 19 23:29:47 2016 +0100
@@ -9,6 +9,7 @@
 #include <event2/listener.h>
 #include <event2/util.h>
 #include <event2/event.h>
+#include <sys/socket.h>
 #include <sys/un.h>
 #include <unistd.h>
 
@@ -23,8 +24,7 @@
 static void conn_write_cb(struct bufferevent *, void *);
 static void conn_event_cb(struct bufferevent *, short, void *);
 static void signal_cb(evutil_socket_t, short, void *);
-
-static char rot13_char(char);
+static void print_socket_info(int);
 
 int main(int argc, char **argv) {
 	struct event_base *base;
@@ -99,11 +99,14 @@
 		fprintf(stderr, "Unable to accept(): %d", fd);
 		return;
 	} else if (fd > FD_SETSIZE) {
+		// FD_SETSIZE = 1024 -- Proč? Co když bude spojení víc?
 		close(fd);
 		return;
 	}
 
 	evutil_make_socket_nonblocking(fd);
+	
+	print_socket_info(fd);
 
 	bev = bufferevent_socket_new(base, fd, BEV_OPT_CLOSE_ON_FREE);
 	if (!bev) {
@@ -159,7 +162,7 @@
 
 static void conn_event_cb(struct bufferevent *bev, short events, void *user_data) {
 	printf("conn_event_cb: user_data = '%s'\n", (char*) user_data);
-	
+
 	if (events & BEV_EVENT_EOF) {
 		printf("Connection closed.\n");
 	} else if (events & BEV_EVENT_ERROR) {
@@ -178,3 +181,12 @@
 
 	event_base_loopexit(base, &delay);
 }
+
+static void print_socket_info(int fd) {
+	struct ucred cr;
+	unsigned int cl = sizeof (cr);
+
+	if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &cl) == 0) {
+		printf("připojený klient: pid=%d, uid=%d, gid=%d\n", cr.pid, cr.uid, cr.gid);
+	}
+}
\ No newline at end of file