sock_events.c: also track child file descriptors

In some applications, such as OsmocomBB, a single UNIX socket
can be used by multiple processes (i.e. a server and multiple
clients). Previously this caused a segmentation fault.

Let's modify both sock_ev_accept() and sock_ev_accept4() in order
to handle such connections properly, by using both socket path
and dissector from the parent.

1 files changed, 3 insertions, 0 deletions

diff --git a/utils.h b/utils.h
index 8145c9b..6829ffe 100644
--- a/utils.h
+++ b/utils.h
@@ -21,6 +21,9 @@ struct sock_state *udtrace_sstate_by_fd(int fd);
 /* add a file descriptor from the list of to-be-traced ones */
 void udtrace_add_fd(int fd);
 
+/* add a file descriptor from the list of to-be-traced ones */
+void udtrace_add_fd_child(int pfd, int cfd);
+
 /* delete a file descriptor from the list of to-be-traced ones */
 void udtrace_del_fd(int fd);