inet/inet6 sockets: apply timeout

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

diff --git a/src/common/sessiond-comm/sessiond-comm.c b/src/common/sessiond-comm/sessiond-comm.c
index ef51e0a85f697ecc5b1902a16294e2c6b4dc0c17..65952b273eaf49c52a17955ab6bda441bd65f554 100644 (file)
--- a/src/common/sessiond-comm/sessiond-comm.c
+++ b/src/common/sessiond-comm/sessiond-comm.c
@@ -38,6 +38,8 @@
 /* For Inet6 socket */
 #include "inet6.h"
 
+#define NETWORK_TIMEOUT_ENV    "LTTNG_NETWORK_SOCKET_TIMEOUT"
+
 static struct lttcomm_net_family net_families[] = {
        { LTTCOMM_INET, lttcomm_create_inet_sock },
        { LTTCOMM_INET6, lttcomm_create_inet6_sock },
@@ -61,11 +63,17 @@ static const char *lttcomm_readable_code[] = {
        [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL",
        [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM",
        [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE",
+       [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ENOMEM) ] = "Consumer is out of memory",
+       [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_METADATA) ] = "Error with metadata",
+       [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_FATAL) ] = "Fatal error",
+       [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_RELAYD_FAIL) ] = "Error on remote relayd",
 
        /* Last element */
        [ LTTCOMM_ERR_INDEX(LTTCOMM_NR) ] = "Unknown error code"
 };
 
+static unsigned long network_timeout;
+
 /*
  * Return ptr to string representing a human readable error code from the
  * lttcomm_return_code enum.
@@ -313,3 +321,121 @@ void lttcomm_destroy_sock(struct lttcomm_sock *sock)
 {
        free(sock);
 }
+
+/*
+ * Allocate and return a relayd socket object using a given URI to initialize
+ * it and the major/minor version of the supported protocol.
+ *
+ * On error, NULL is returned.
+ */
+LTTNG_HIDDEN
+struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(struct lttng_uri *uri,
+               uint32_t major, uint32_t minor)
+{
+       int ret;
+       struct lttcomm_sock *tmp_sock = NULL;
+       struct lttcomm_relayd_sock *rsock = NULL;
+
+       assert(uri);
+
+       rsock = zmalloc(sizeof(*rsock));
+       if (!rsock) {
+               PERROR("zmalloc relayd sock");
+               goto error;
+       }
+
+       /* Allocate socket object from URI */
+       tmp_sock = lttcomm_alloc_sock_from_uri(uri);
+       if (tmp_sock == NULL) {
+               goto error_free;
+       }
+
+       /*
+        * Create socket object which basically sets the ops according to the
+        * socket protocol.
+        */
+       lttcomm_copy_sock(&rsock->sock, tmp_sock);
+       /* Temporary socket pointer not needed anymore. */
+       lttcomm_destroy_sock(tmp_sock);
+       ret = lttcomm_create_sock(&rsock->sock);
+       if (ret < 0) {
+               goto error_free;
+       }
+
+       rsock->major = major;
+       rsock->minor = minor;
+
+       return rsock;
+
+error_free:
+       free(rsock);
+error:
+       return NULL;
+}
+
+/*
+ * Set socket receiving timeout.
+ */
+LTTNG_HIDDEN
+int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec)
+{
+       int ret;
+       struct timeval tv;
+
+       tv.tv_sec = msec / 1000;
+       tv.tv_usec = (msec % 1000) * 1000;
+
+       ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
+       if (ret < 0) {
+               PERROR("setsockopt SO_RCVTIMEO");
+       }
+
+       return ret;
+}
+
+/*
+ * Set socket sending timeout.
+ */
+LTTNG_HIDDEN
+int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec)
+{
+       int ret;
+       struct timeval tv;
+
+       tv.tv_sec = msec / 1000;
+       tv.tv_usec = (msec % 1000) * 1000;
+
+       ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
+       if (ret < 0) {
+               PERROR("setsockopt SO_SNDTIMEO");
+       }
+
+       return ret;
+}
+
+LTTNG_HIDDEN
+void lttcomm_init(void)
+{
+       const char *env;
+
+       env = getenv(NETWORK_TIMEOUT_ENV);
+       if (env) {
+               long timeout;
+
+               errno = 0;
+               timeout = strtol(env, NULL, 0);
+               if (errno != 0 || timeout < -1L) {
+                       PERROR("Network timeout");
+               } else {
+                       if (timeout > 0) {
+                               network_timeout = timeout;
+                       }
+               }
+       }
+}
+
+LTTNG_HIDDEN
+unsigned long lttcomm_get_network_timeout(void)
+{
+       return network_timeout;
+}