Fix: Connect timeout arithmetic in inet/inet6 (v4)

[lttng-tools.git] / src / common / sessiond-comm / inet6.c

diff --git a/src/common/sessiond-comm/inet6.c b/src/common/sessiond-comm/inet6.c
index dfb5fc5d1238c1b5cc6aa1b55cd0536b65ffec85..03b6627d1dce45188d28d81d234cb2c208c062eb 100644 (file)
--- a/src/common/sessiond-comm/inet6.c
+++ b/src/common/sessiond-comm/inet6.c
@@ -110,31 +110,13 @@ int connect_no_timeout(struct lttcomm_sock *sock)
                        sizeof(sock->sockaddr.addr.sin6));
 }
 
-/*
- * Return time_a - time_b  in milliseconds.
- */
-static
-unsigned long time_diff_ms(struct timespec *time_a,
-               struct timespec *time_b)
-{
-       time_t sec_diff;
-       long nsec_diff;
-       unsigned long result_ms;
-
-       sec_diff = time_a->tv_sec - time_b->tv_sec;
-       nsec_diff = time_a->tv_nsec - time_b->tv_nsec;
-
-       result_ms = sec_diff * MSEC_PER_SEC;
-       result_ms += nsec_diff / NSEC_PER_MSEC;
-       return result_ms;
-}
-
 static
 int connect_with_timeout(struct lttcomm_sock *sock)
 {
        unsigned long timeout = lttcomm_get_network_timeout();
        int ret, flags, connect_ret;
        struct timespec orig_time, cur_time;
+       unsigned long diff_ms;
 
        ret = fcntl(sock->fd, F_GETFL, 0);
        if (ret == -1) {
@@ -216,7 +198,12 @@ int connect_with_timeout(struct lttcomm_sock *sock)
                        connect_ret = ret;
                        goto error;
                }
-       } while (time_diff_ms(&cur_time, &orig_time) < timeout);
+               if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) {
+                       ERR("timespec_to_ms input overflows milliseconds output");
+                       connect_ret = -1;
+                       goto error;
+               }
+       } while (diff_ms < timeout);
 
        /* Timeout */
        errno = ETIMEDOUT;