summaryrefslogtreecommitdiffstats
path: root/collectors/ebpf.plugin/ebpf_socket.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 11:08:07 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 11:08:07 +0000
commitc69cb8cc094cc916adbc516b09e944cd3d137c01 (patch)
treef2878ec41fb6d0e3613906c6722fc02b934eeb80 /collectors/ebpf.plugin/ebpf_socket.c
parentInitial commit. (diff)
downloadnetdata-c69cb8cc094cc916adbc516b09e944cd3d137c01.tar.xz
netdata-c69cb8cc094cc916adbc516b09e944cd3d137c01.zip
Adding upstream version 1.29.3.upstream/1.29.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'collectors/ebpf.plugin/ebpf_socket.c')
-rw-r--r--collectors/ebpf.plugin/ebpf_socket.c1920
1 files changed, 1920 insertions, 0 deletions
diff --git a/collectors/ebpf.plugin/ebpf_socket.c b/collectors/ebpf.plugin/ebpf_socket.c
new file mode 100644
index 0000000..7fbc244
--- /dev/null
+++ b/collectors/ebpf.plugin/ebpf_socket.c
@@ -0,0 +1,1920 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <sys/resource.h>
+
+#include "ebpf.h"
+#include "ebpf_socket.h"
+
+/*****************************************************************
+ *
+ * GLOBAL VARIABLES
+ *
+ *****************************************************************/
+
+static char *socket_dimension_names[NETDATA_MAX_SOCKET_VECTOR] = { "sent", "received", "close", "sent",
+ "received", "retransmitted" };
+static char *socket_id_names[NETDATA_MAX_SOCKET_VECTOR] = { "tcp_sendmsg", "tcp_cleanup_rbuf", "tcp_close",
+ "udp_sendmsg", "udp_recvmsg", "tcp_retransmit_skb" };
+
+static netdata_idx_t *socket_hash_values = NULL;
+static netdata_syscall_stat_t *socket_aggregated_data = NULL;
+static netdata_publish_syscall_t *socket_publish_aggregated = NULL;
+
+static ebpf_data_t socket_data;
+
+ebpf_socket_publish_apps_t **socket_bandwidth_curr = NULL;
+static ebpf_bandwidth_t *bandwidth_vector = NULL;
+
+static int socket_apps_created = 0;
+pthread_mutex_t nv_mutex;
+int wait_to_plot = 0;
+int read_thread_closed = 1;
+
+netdata_vector_plot_t inbound_vectors = { .plot = NULL, .next = 0, .last = 0 };
+netdata_vector_plot_t outbound_vectors = { .plot = NULL, .next = 0, .last = 0 };
+netdata_socket_t *socket_values;
+
+ebpf_network_viewer_port_list_t *listen_ports = NULL;
+
+static int *map_fd = NULL;
+static struct bpf_object *objects = NULL;
+static struct bpf_link **probe_links = NULL;
+
+/*****************************************************************
+ *
+ * PROCESS DATA AND SEND TO NETDATA
+ *
+ *****************************************************************/
+
+/**
+ * Update publish structure before to send data to Netdata.
+ *
+ * @param publish the first output structure with independent dimensions
+ * @param tcp structure to store IO from tcp sockets
+ * @param udp structure to store IO from udp sockets
+ * @param input the structure with the input data.
+ */
+static void ebpf_update_global_publish(
+ netdata_publish_syscall_t *publish, netdata_publish_vfs_common_t *tcp, netdata_publish_vfs_common_t *udp,
+ netdata_syscall_stat_t *input)
+{
+ netdata_publish_syscall_t *move = publish;
+ while (move) {
+ if (input->call != move->pcall) {
+ // This condition happens to avoid initial values with dimensions higher than normal values.
+ if (move->pcall) {
+ move->ncall = (input->call > move->pcall) ? input->call - move->pcall : move->pcall - input->call;
+ move->nbyte = (input->bytes > move->pbyte) ? input->bytes - move->pbyte : move->pbyte - input->bytes;
+ move->nerr = (input->ecall > move->nerr) ? input->ecall - move->perr : move->perr - input->ecall;
+ } else {
+ move->ncall = 0;
+ move->nbyte = 0;
+ move->nerr = 0;
+ }
+
+ move->pcall = input->call;
+ move->pbyte = input->bytes;
+ move->perr = input->ecall;
+ } else {
+ move->ncall = 0;
+ move->nbyte = 0;
+ move->nerr = 0;
+ }
+
+ input = input->next;
+ move = move->next;
+ }
+
+ tcp->write = -(long)publish[0].nbyte;
+ tcp->read = (long)publish[1].nbyte;
+
+ udp->write = -(long)publish[3].nbyte;
+ udp->read = (long)publish[4].nbyte;
+}
+
+/**
+ * Update Network Viewer plot data
+ *
+ * @param plot the structure where the data will be stored
+ * @param sock the last update from the socket
+ */
+static inline void update_nv_plot_data(netdata_plot_values_t *plot, netdata_socket_t *sock)
+{
+ if (sock->ct > plot->last_time) {
+ plot->last_time = sock->ct;
+ plot->plot_recv_packets = sock->recv_packets;
+ plot->plot_sent_packets = sock->sent_packets;
+ plot->plot_recv_bytes = sock->recv_bytes;
+ plot->plot_sent_bytes = sock->sent_bytes;
+ plot->plot_retransmit = sock->retransmit;
+ }
+
+ sock->recv_packets = 0;
+ sock->sent_packets = 0;
+ sock->recv_bytes = 0;
+ sock->sent_bytes = 0;
+ sock->retransmit = 0;
+}
+
+/**
+ * Calculate Network Viewer Plot
+ *
+ * Do math with collected values before to plot data.
+ */
+static inline void calculate_nv_plot()
+{
+ uint32_t i;
+ uint32_t end = inbound_vectors.next;
+ for (i = 0; i < end; i++) {
+ update_nv_plot_data(&inbound_vectors.plot[i].plot, &inbound_vectors.plot[i].sock);
+ }
+ inbound_vectors.max_plot = end;
+
+ // The 'Other' dimension is always calculated for the chart to have at least one dimension
+ update_nv_plot_data(&inbound_vectors.plot[inbound_vectors.last].plot,
+ &inbound_vectors.plot[inbound_vectors.last].sock);
+
+ end = outbound_vectors.next;
+ for (i = 0; i < end; i++) {
+ update_nv_plot_data(&outbound_vectors.plot[i].plot, &outbound_vectors.plot[i].sock);
+ }
+ outbound_vectors.max_plot = end;
+
+ // The 'Other' dimension is always calculated for the chart to have at least one dimension
+ update_nv_plot_data(&outbound_vectors.plot[outbound_vectors.last].plot,
+ &outbound_vectors.plot[outbound_vectors.last].sock);
+}
+
+/**
+ * Network viewer send bytes
+ *
+ * @param ptr the structure with values to plot
+ * @param chart the chart name.
+ */
+static inline void ebpf_socket_nv_send_bytes(netdata_vector_plot_t *ptr, char *chart)
+{
+ uint32_t i;
+ uint32_t end = ptr->last_plot;
+ netdata_socket_plot_t *w = ptr->plot;
+ collected_number value;
+
+ write_begin_chart(NETDATA_EBPF_FAMILY, chart);
+ for (i = 0; i < end; i++) {
+ value = ((collected_number) w[i].plot.plot_sent_bytes);
+ write_chart_dimension(w[i].dimension_sent, value);
+ value = (collected_number) w[i].plot.plot_recv_bytes;
+ write_chart_dimension(w[i].dimension_recv, value);
+ }
+
+ i = ptr->last;
+ value = ((collected_number) w[i].plot.plot_sent_bytes);
+ write_chart_dimension(w[i].dimension_sent, value);
+ value = (collected_number) w[i].plot.plot_recv_bytes;
+ write_chart_dimension(w[i].dimension_recv, value);
+ write_end_chart();
+}
+
+/**
+ * Network Viewer Send packets
+ *
+ * @param ptr the structure with values to plot
+ * @param chart the chart name.
+ */
+static inline void ebpf_socket_nv_send_packets(netdata_vector_plot_t *ptr, char *chart)
+{
+ uint32_t i;
+ uint32_t end = ptr->last_plot;
+ netdata_socket_plot_t *w = ptr->plot;
+ collected_number value;
+
+ write_begin_chart(NETDATA_EBPF_FAMILY, chart);
+ for (i = 0; i < end; i++) {
+ value = ((collected_number)w[i].plot.plot_sent_packets);
+ write_chart_dimension(w[i].dimension_sent, value);
+ value = (collected_number) w[i].plot.plot_recv_packets;
+ write_chart_dimension(w[i].dimension_recv, value);
+ }
+
+ i = ptr->last;
+ value = ((collected_number)w[i].plot.plot_sent_packets);
+ write_chart_dimension(w[i].dimension_sent, value);
+ value = (collected_number)w[i].plot.plot_recv_packets;
+ write_chart_dimension(w[i].dimension_recv, value);
+ write_end_chart();
+}
+
+/**
+ * Network Viewer Send Retransmit
+ *
+ * @param ptr the structure with values to plot
+ * @param chart the chart name.
+ */
+static inline void ebpf_socket_nv_send_retransmit(netdata_vector_plot_t *ptr, char *chart)
+{
+ uint32_t i;
+ uint32_t end = ptr->last_plot;
+ netdata_socket_plot_t *w = ptr->plot;
+ collected_number value;
+
+ write_begin_chart(NETDATA_EBPF_FAMILY, chart);
+ for (i = 0; i < end; i++) {
+ value = (collected_number) w[i].plot.plot_retransmit;
+ write_chart_dimension(w[i].dimension_retransmit, value);
+ }
+
+ i = ptr->last;
+ value = (collected_number)w[i].plot.plot_retransmit;
+ write_chart_dimension(w[i].dimension_retransmit, value);
+ write_end_chart();
+}
+
+/**
+ * Send network viewer data
+ *
+ * @param ptr the pointer to plot data
+ */
+static void ebpf_socket_send_nv_data(netdata_vector_plot_t *ptr)
+{
+ if (!ptr->flags)
+ return;
+
+ if (ptr == (netdata_vector_plot_t *)&outbound_vectors) {
+ ebpf_socket_nv_send_bytes(ptr, NETDATA_NV_OUTBOUND_BYTES);
+ fflush(stdout);
+
+ ebpf_socket_nv_send_packets(ptr, NETDATA_NV_OUTBOUND_PACKETS);
+ fflush(stdout);
+
+ ebpf_socket_nv_send_retransmit(ptr, NETDATA_NV_OUTBOUND_RETRANSMIT);
+ fflush(stdout);
+ } else {
+ ebpf_socket_nv_send_bytes(ptr, NETDATA_NV_INBOUND_BYTES);
+ fflush(stdout);
+
+ ebpf_socket_nv_send_packets(ptr, NETDATA_NV_INBOUND_PACKETS);
+ fflush(stdout);
+ }
+}
+
+/**
+ * Send data to Netdata calling auxiliar functions.
+ *
+ * @param em the structure with thread information
+ */
+static void ebpf_socket_send_data(ebpf_module_t *em)
+{
+ netdata_publish_vfs_common_t common_tcp;
+ netdata_publish_vfs_common_t common_udp;
+ ebpf_update_global_publish(socket_publish_aggregated, &common_tcp, &common_udp, socket_aggregated_data);
+
+ // We read bytes from function arguments, but bandiwdth is given in bits,
+ // so we need to multiply by 8 to convert for the final value.
+ write_count_chart(
+ NETDATA_TCP_FUNCTION_COUNT, NETDATA_EBPF_FAMILY, socket_publish_aggregated, 3);
+ write_io_chart(
+ NETDATA_TCP_FUNCTION_BITS, NETDATA_EBPF_FAMILY, socket_id_names[0], common_tcp.write*8/1000,
+ socket_id_names[1], common_tcp.read*8/1000);
+ if (em->mode < MODE_ENTRY) {
+ write_err_chart(
+ NETDATA_TCP_FUNCTION_ERROR, NETDATA_EBPF_FAMILY, socket_publish_aggregated, 2);
+ }
+ write_count_chart(
+ NETDATA_TCP_RETRANSMIT, NETDATA_EBPF_FAMILY, &socket_publish_aggregated[NETDATA_RETRANSMIT_START], 1);
+
+ write_count_chart(
+ NETDATA_UDP_FUNCTION_COUNT, NETDATA_EBPF_FAMILY, &socket_publish_aggregated[NETDATA_UDP_START], 2);
+ write_io_chart(
+ NETDATA_UDP_FUNCTION_BITS, NETDATA_EBPF_FAMILY,
+ socket_id_names[3],(long long)common_udp.write*8/100,
+ socket_id_names[4], (long long)common_udp.read*8/1000);
+ if (em->mode < MODE_ENTRY) {
+ write_err_chart(
+ NETDATA_UDP_FUNCTION_ERROR, NETDATA_EBPF_FAMILY, &socket_publish_aggregated[NETDATA_UDP_START], 2);
+ }
+}
+
+/**
+ * Sum values for pid
+ *
+ * @param root the structure with all available PIDs
+ *
+ * @param offset the address that we are reading
+ *
+ * @return it returns the sum of all PIDs
+ */
+long long ebpf_socket_sum_values_for_pids(struct pid_on_target *root, size_t offset)
+{
+ long long ret = 0;
+ while (root) {
+ int32_t pid = root->pid;
+ ebpf_socket_publish_apps_t *w = socket_bandwidth_curr[pid];
+ if (w) {
+ ret += get_value_from_structure((char *)w, offset);
+ }
+
+ root = root->next;
+ }
+
+ return ret;
+}
+
+/**
+ * Send data to Netdata calling auxiliar functions.
+ *
+ * @param em the structure with thread information
+ * @param root the target list.
+ */
+void ebpf_socket_send_apps_data(ebpf_module_t *em, struct target *root)
+{
+ UNUSED(em);
+ if (!socket_apps_created)
+ return;
+
+ struct target *w;
+ collected_number value;
+
+ write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_NET_APPS_BANDWIDTH_SENT);
+ for (w = root; w; w = w->next) {
+ if (unlikely(w->exposed && w->processes)) {
+ value = ebpf_socket_sum_values_for_pids(w->root_pid, offsetof(ebpf_socket_publish_apps_t,
+ bytes_sent));
+ // We multiply by 0.008, because we read bytes, but we display bits
+ write_chart_dimension(w->name, ((value)*8)/1000);
+ }
+ }
+ write_end_chart();
+
+ write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_NET_APPS_BANDWIDTH_RECV);
+ for (w = root; w; w = w->next) {
+ if (unlikely(w->exposed && w->processes)) {
+ value = ebpf_socket_sum_values_for_pids(w->root_pid, offsetof(ebpf_socket_publish_apps_t,
+ bytes_received));
+ // We multiply by 0.008, because we read bytes, but we display bits
+ write_chart_dimension(w->name, ((value)*8)/1000);
+ }
+ }
+ write_end_chart();
+
+ write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_NET_APPS_BANDWIDTH_TCP_SEND_CALLS);
+ for (w = root; w; w = w->next) {
+ if (unlikely(w->exposed && w->processes)) {
+ value = ebpf_socket_sum_values_for_pids(w->root_pid, offsetof(ebpf_socket_publish_apps_t,
+ call_tcp_sent));
+ write_chart_dimension(w->name, value);
+ }
+ }
+ write_end_chart();
+
+ write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_NET_APPS_BANDWIDTH_TCP_RECV_CALLS);
+ for (w = root; w; w = w->next) {
+ if (unlikely(w->exposed && w->processes)) {
+ value = ebpf_socket_sum_values_for_pids(w->root_pid, offsetof(ebpf_socket_publish_apps_t,
+ call_tcp_received));
+ write_chart_dimension(w->name, value);
+ }
+ }
+ write_end_chart();
+
+ write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_NET_APPS_BANDWIDTH_TCP_RETRANSMIT);
+ for (w = root; w; w = w->next) {
+ if (unlikely(w->exposed && w->processes)) {
+ value = ebpf_socket_sum_values_for_pids(w->root_pid, offsetof(ebpf_socket_publish_apps_t,
+ retransmit));
+ write_chart_dimension(w->name, value);
+ }
+ }
+ write_end_chart();
+
+ write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_NET_APPS_BANDWIDTH_UDP_SEND_CALLS);
+ for (w = root; w; w = w->next) {
+ if (unlikely(w->exposed && w->processes)) {
+ value = ebpf_socket_sum_values_for_pids(w->root_pid, offsetof(ebpf_socket_publish_apps_t,
+ call_udp_sent));
+ write_chart_dimension(w->name, value);
+ }
+ }
+ write_end_chart();
+
+ write_begin_chart(NETDATA_APPS_FAMILY, NETDATA_NET_APPS_BANDWIDTH_UDP_RECV_CALLS);
+ for (w = root; w; w = w->next) {
+ if (unlikely(w->exposed && w->processes)) {
+ value = ebpf_socket_sum_values_for_pids(w->root_pid, offsetof(ebpf_socket_publish_apps_t,
+ call_udp_received));
+ write_chart_dimension(w->name, value);
+ }
+ }
+ write_end_chart();
+
+}
+
+/*****************************************************************
+ *
+ * FUNCTIONS TO CREATE CHARTS
+ *
+ *****************************************************************/
+
+/**
+ * Create global charts
+ *
+ * Call ebpf_create_chart to create the charts for the collector.
+ *
+ * @param em a pointer to the structure with the default values.
+ */
+static void ebpf_create_global_charts(ebpf_module_t *em)
+{
+ ebpf_create_chart(NETDATA_EBPF_FAMILY,
+ NETDATA_TCP_FUNCTION_COUNT,
+ "Calls to internal functions",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_SOCKET_GROUP,
+ 21070,
+ ebpf_create_global_dimension,
+ socket_publish_aggregated,
+ 3);
+
+ ebpf_create_chart(NETDATA_EBPF_FAMILY, NETDATA_TCP_FUNCTION_BITS,
+ "TCP bandwidth", EBPF_COMMON_DIMENSION_BITS,
+ NETDATA_SOCKET_GROUP,
+ 21071,
+ ebpf_create_global_dimension,
+ socket_publish_aggregated,
+ 3);
+
+ if (em->mode < MODE_ENTRY) {
+ ebpf_create_chart(NETDATA_EBPF_FAMILY,
+ NETDATA_TCP_FUNCTION_ERROR,
+ "TCP errors",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_SOCKET_GROUP,
+ 21072,
+ ebpf_create_global_dimension,
+ socket_publish_aggregated,
+ 2);
+ }
+
+ ebpf_create_chart(NETDATA_EBPF_FAMILY,
+ NETDATA_TCP_RETRANSMIT,
+ "Packages retransmitted",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_SOCKET_GROUP,
+ 21073,
+ ebpf_create_global_dimension,
+ &socket_publish_aggregated[NETDATA_RETRANSMIT_START],
+ 1);
+
+ ebpf_create_chart(NETDATA_EBPF_FAMILY,
+ NETDATA_UDP_FUNCTION_COUNT,
+ "UDP calls",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_SOCKET_GROUP,
+ 21074,
+ ebpf_create_global_dimension,
+ &socket_publish_aggregated[NETDATA_UDP_START],
+ 2);
+
+ ebpf_create_chart(NETDATA_EBPF_FAMILY, NETDATA_UDP_FUNCTION_BITS,
+ "UDP bandwidth", EBPF_COMMON_DIMENSION_BITS,
+ NETDATA_SOCKET_GROUP,
+ 21075,
+ ebpf_create_global_dimension,
+ &socket_publish_aggregated[NETDATA_UDP_START],
+ 2);
+
+ if (em->mode < MODE_ENTRY) {
+ ebpf_create_chart(NETDATA_EBPF_FAMILY,
+ NETDATA_UDP_FUNCTION_ERROR,
+ "UDP errors",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_SOCKET_GROUP,
+ 21076,
+ ebpf_create_global_dimension,
+ &socket_publish_aggregated[NETDATA_UDP_START],
+ 2);
+ }
+}
+
+/**
+ * Create apps charts
+ *
+ * Call ebpf_create_chart to create the charts on apps submenu.
+ *
+ * @param em a pointer to the structure with the default values.
+ */
+void ebpf_socket_create_apps_charts(ebpf_module_t *em, struct target *root)
+{
+ UNUSED(em);
+ ebpf_create_charts_on_apps(NETDATA_NET_APPS_BANDWIDTH_SENT,
+ "Bytes sent", EBPF_COMMON_DIMENSION_BITS,
+ NETDATA_APPS_NET_GROUP,
+ 20080,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ root);
+
+ ebpf_create_charts_on_apps(NETDATA_NET_APPS_BANDWIDTH_RECV,
+ "bytes received", EBPF_COMMON_DIMENSION_BITS,
+ NETDATA_APPS_NET_GROUP,
+ 20081,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ root);
+
+ ebpf_create_charts_on_apps(NETDATA_NET_APPS_BANDWIDTH_TCP_SEND_CALLS,
+ "Calls for tcp_sendmsg",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_NET_GROUP,
+ 20082,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ root);
+
+ ebpf_create_charts_on_apps(NETDATA_NET_APPS_BANDWIDTH_TCP_RECV_CALLS,
+ "Calls for tcp_cleanup_rbuf",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_NET_GROUP,
+ 20083,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ root);
+
+ ebpf_create_charts_on_apps(NETDATA_NET_APPS_BANDWIDTH_TCP_RETRANSMIT,
+ "Calls for tcp_retransmit",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_NET_GROUP,
+ 20084,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ root);
+
+ ebpf_create_charts_on_apps(NETDATA_NET_APPS_BANDWIDTH_UDP_SEND_CALLS,
+ "Calls for udp_sendmsg",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_NET_GROUP,
+ 20085,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ root);
+
+ ebpf_create_charts_on_apps(NETDATA_NET_APPS_BANDWIDTH_UDP_RECV_CALLS,
+ "Calls for udp_recvmsg",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_APPS_NET_GROUP,
+ 20086,
+ ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX],
+ root);
+
+ socket_apps_created = 1;
+}
+
+/**
+ * Create network viewer chart
+ *
+ * Create common charts.
+ *
+ * @param id the chart id
+ * @param title the chart title
+ * @param units the units label
+ * @param family the group name used to attach the chart on dashaboard
+ * @param order the chart order
+ * @param ptr the plot structure with values.
+ */
+static void ebpf_socket_create_nv_chart(char *id, char *title, char *units,
+ char *family, int order, netdata_vector_plot_t *ptr)
+{
+ ebpf_write_chart_cmd(NETDATA_EBPF_FAMILY,
+ id,
+ title,
+ units,
+ family,
+ "stacked",
+ order);
+
+ uint32_t i;
+ uint32_t end = ptr->last_plot;
+ netdata_socket_plot_t *w = ptr->plot;
+ for (i = 0; i < end; i++) {
+ fprintf(stdout, "DIMENSION %s '' incremental -1 1\n", w[i].dimension_sent);
+ fprintf(stdout, "DIMENSION %s '' incremental 1 1\n", w[i].dimension_recv);
+ }
+
+ end = ptr->last;
+ fprintf(stdout, "DIMENSION %s '' incremental -1 1\n", w[end].dimension_sent);
+ fprintf(stdout, "DIMENSION %s '' incremental 1 1\n", w[end].dimension_recv);
+}
+
+/**
+ * Create network viewer retransmit
+ *
+ * Create a specific chart.
+ *
+ * @param id the chart id
+ * @param title the chart title
+ * @param units the units label
+ * @param family the group name used to attach the chart on dashaboard
+ * @param order the chart order
+ * @param ptr the plot structure with values.
+ */
+static void ebpf_socket_create_nv_retransmit(char *id, char *title, char *units,
+ char *family, int order, netdata_vector_plot_t *ptr)
+{
+ ebpf_write_chart_cmd(NETDATA_EBPF_FAMILY,
+ id,
+ title,
+ units,
+ family,
+ "stacked",
+ order);
+
+ uint32_t i;
+ uint32_t end = ptr->last_plot;
+ netdata_socket_plot_t *w = ptr->plot;
+ for (i = 0; i < end; i++) {
+ fprintf(stdout, "DIMENSION %s '' incremental 1 1\n", w[i].dimension_retransmit);
+ }
+
+ end = ptr->last;
+ fprintf(stdout, "DIMENSION %s '' incremental 1 1\n", w[end].dimension_retransmit);
+}
+
+/**
+ * Create Network Viewer charts
+ *
+ * Recreate the charts when new sockets are created.
+ *
+ * @param ptr a pointer for inbound or outbound vectors.
+ */
+static void ebpf_socket_create_nv_charts(netdata_vector_plot_t *ptr)
+{
+ // We do not have new sockets, so we do not need move forward
+ if (ptr->max_plot == ptr->last_plot)
+ return;
+
+ ptr->last_plot = ptr->max_plot;
+
+ if (ptr == (netdata_vector_plot_t *)&outbound_vectors) {
+ ebpf_socket_create_nv_chart(NETDATA_NV_OUTBOUND_BYTES,
+ "Outbound connections (bytes).", EBPF_COMMON_DIMENSION_BYTES,
+ NETDATA_NETWORK_CONNECTIONS_GROUP,
+ 21080,
+ ptr);
+
+ ebpf_socket_create_nv_chart(NETDATA_NV_OUTBOUND_PACKETS,
+ "Outbound connections (packets)",
+ EBPF_COMMON_DIMENSION_PACKETS,
+ NETDATA_NETWORK_CONNECTIONS_GROUP,
+ 21082,
+ ptr);
+
+ ebpf_socket_create_nv_retransmit(NETDATA_NV_OUTBOUND_RETRANSMIT,
+ "Retransmitted packets",
+ EBPF_COMMON_DIMENSION_CALL,
+ NETDATA_NETWORK_CONNECTIONS_GROUP,
+ 21083,
+ ptr);
+ } else {
+ ebpf_socket_create_nv_chart(NETDATA_NV_INBOUND_BYTES,
+ "Inbound connections (bytes)", EBPF_COMMON_DIMENSION_BYTES,
+ NETDATA_NETWORK_CONNECTIONS_GROUP,
+ 21084,
+ ptr);
+
+ ebpf_socket_create_nv_chart(NETDATA_NV_INBOUND_PACKETS,
+ "Inbound connections (packets)",
+ EBPF_COMMON_DIMENSION_PACKETS,
+ NETDATA_NETWORK_CONNECTIONS_GROUP,
+ 21085,
+ ptr);
+ }
+
+ ptr->flags |= NETWORK_VIEWER_CHARTS_CREATED;
+}
+
+/*****************************************************************
+ *
+ * READ INFORMATION FROM KERNEL RING
+ *
+ *****************************************************************/
+
+/**
+ * Is specific ip inside the range
+ *
+ * Check if the ip is inside a IP range previously defined
+ *
+ * @param cmp the IP to compare
+ * @param family the IP family
+ *
+ * @return It returns 1 if the IP is inside the range and 0 otherwise
+ */
+static int is_specific_ip_inside_range(union netdata_ip_t *cmp, int family)
+{
+ if (!network_viewer_opt.excluded_ips && !network_viewer_opt.included_ips)
+ return 1;
+
+ uint32_t ipv4_test = ntohl(cmp->addr32[0]);
+ ebpf_network_viewer_ip_list_t *move = network_viewer_opt.excluded_ips;
+ while (move) {
+ if (family == AF_INET) {
+ if (ntohl(move->first.addr32[0]) <= ipv4_test &&
+ ipv4_test <= ntohl(move->last.addr32[0]) )
+ return 0;
+ } else {
+ if (memcmp(move->first.addr8, cmp->addr8, sizeof(union netdata_ip_t)) <= 0 &&
+ memcmp(move->last.addr8, cmp->addr8, sizeof(union netdata_ip_t)) >= 0) {
+ return 0;
+ }
+ }
+ move = move->next;
+ }
+
+ move = network_viewer_opt.included_ips;
+ while (move) {
+ if (family == AF_INET) {
+ if (ntohl(move->first.addr32[0]) <= ipv4_test &&
+ ntohl(move->last.addr32[0]) >= ipv4_test)
+ return 1;
+ } else {
+ if (memcmp(move->first.addr8, cmp->addr8, sizeof(union netdata_ip_t)) <= 0 &&
+ memcmp(move->last.addr8, cmp->addr8, sizeof(union netdata_ip_t)) >= 0) {
+ return 1;
+ }
+ }
+ move = move->next;
+ }
+
+ return 0;
+}
+
+/**
+ * Is port inside range
+ *
+ * Verify if the cmp port is inside the range [first, last].
+ * This function expects only the last parameter as big endian.
+ *
+ * @param cmp the value to compare
+ *
+ * @return It returns 1 when cmp is inside and 0 otherwise.
+ */
+static int is_port_inside_range(uint16_t cmp)
+{
+ // We do not have restrictions for ports.
+ if (!network_viewer_opt.excluded_port && !network_viewer_opt.included_port)
+ return 1;
+
+ // Test if port is excluded
+ ebpf_network_viewer_port_list_t *move = network_viewer_opt.excluded_port;
+ cmp = htons(cmp);
+ while (move) {
+ if (move->cmp_first <= cmp && cmp <= move->cmp_last)
+ return 0;
+
+ move = move->next;
+ }
+
+ // Test if the port is inside allowed range
+ move = network_viewer_opt.included_port;
+ while (move) {
+ if (move->cmp_first <= cmp && cmp <= move->cmp_last)
+ return 1;
+
+ move = move->next;
+ }
+
+ return 0;
+}
+
+/**
+ * Hostname matches pattern
+ *
+ * @param cmp the value to compare
+ *
+ * @return It returns 1 when the value matches and zero otherwise.
+ */
+int hostname_matches_pattern(char *cmp)
+{
+ if (!network_viewer_opt.included_hostnames && !network_viewer_opt.excluded_hostnames)
+ return 1;
+
+ ebpf_network_viewer_hostname_list_t *move = network_viewer_opt.excluded_hostnames;
+ while (move) {
+ if (simple_pattern_matches(move->value_pattern, cmp))
+ return 0;
+
+ move = move->next;
+ }
+
+ move = network_viewer_opt.included_hostnames;
+ while (move) {
+ if (simple_pattern_matches(move->value_pattern, cmp))
+ return 1;
+
+ move = move->next;
+ }
+
+
+ return 0;
+}
+
+/**
+ * Is socket allowed?
+ *
+ * Compare destination addresses and destination ports to define next steps
+ *
+ * @param key the socket read from kernel ring
+ * @param family the family used to compare IPs (AF_INET and AF_INET6)
+ *
+ * @return It returns 1 if this socket is inside the ranges and 0 otherwise.
+ */
+int is_socket_allowed(netdata_socket_idx_t *key, int family)
+{
+ if (!is_port_inside_range(key->dport))
+ return 0;
+
+ return is_specific_ip_inside_range(&key->daddr, family);
+}
+
+/**
+ * Compare sockets
+ *
+ * Compare destination address and destination port.
+ * We do not compare source port, because it is random.
+ * We also do not compare source address, because inbound and outbound connections are stored in separated AVL trees.
+ *
+ * @param a pointer to netdata_socket_plot
+ * @param b pointer to netdata_socket_plot
+ *
+ * @return It returns 0 case the values are equal, 1 case a is bigger than b and -1 case a is smaller than b.
+ */
+static int compare_sockets(void *a, void *b)
+{
+ struct netdata_socket_plot *val1 = a;
+ struct netdata_socket_plot *val2 = b;
+ int cmp;
+
+ // We do not need to compare val2 family, because data inside hash table is always from the same family
+ if (val1->family == AF_INET) { //IPV4
+ if (val1->flags & NETDATA_INBOUND_DIRECTION) {
+ if (val1->index.sport == val2->index.sport)
+ cmp = 0;
+ else {
+ cmp = (val1->index.sport > val2->index.sport)?1:-1;
+ }
+ } else {
+ cmp = memcmp(&val1->index.dport, &val2->index.dport, sizeof(uint16_t));
+ if (!cmp) {
+ cmp = memcmp(&val1->index.daddr.addr32[0], &val2->index.daddr.addr32[0], sizeof(uint32_t));
+ }
+ }
+ } else {
+ if (val1->flags & NETDATA_INBOUND_DIRECTION) {
+ if (val1->index.sport == val2->index.sport)
+ cmp = 0;
+ else {
+ cmp = (val1->index.sport > val2->index.sport)?1:-1;
+ }
+ } else {
+ cmp = memcmp(&val1->index.dport, &val2->index.dport, sizeof(uint16_t));
+ if (!cmp) {
+ cmp = memcmp(&val1->index.daddr.addr32, &val2->index.daddr.addr32, 4*sizeof(uint32_t));
+ }
+ }
+ }
+
+ return cmp;
+}
+
+/**
+ * Build dimension name
+ *
+ * Fill dimension name vector with values given
+ *
+ * @param dimname the output vector
+ * @param hostname the hostname for the socket.
+ * @param service_name the service used to connect.
+ * @param proto the protocol used in this connection
+ * @param family is this IPV4(AF_INET) or IPV6(AF_INET6)
+ *
+ * @return it returns the size of the data copied on success and -1 otherwise.
+ */
+static inline int build_outbound_dimension_name(char *dimname, char *hostname, char *service_name,
+ char *proto, int family)
+{
+ return snprintf(dimname, CONFIG_MAX_NAME - 7, (family == AF_INET)?"%s:%s:%s_":"%s:%s:[%s]_",
+ service_name, proto,
+ hostname);
+}
+
+/**
+ * Fill inbound dimension name
+ *
+ * Mount the dimension name with the input given
+ *
+ * @param dimname the output vector
+ * @param service_name the service used to connect.
+ * @param proto the protocol used in this connection
+ *
+ * @return it returns the size of the data copied on success and -1 otherwise.
+ */
+static inline int build_inbound_dimension_name(char *dimname, char *service_name, char *proto)
+{
+ return snprintf(dimname, CONFIG_MAX_NAME - 7, "%s:%s_", service_name,
+ proto);
+}
+
+/**
+ * Fill Resolved Name
+ *
+ * Fill the resolved name structure with the value given.
+ * The hostname is the largest value possible, if it is necessary to cut some value, it must be cut.
+ *
+ * @param ptr the output vector
+ * @param hostname the hostname resolved or IP.
+ * @param length the length for the hostname.
+ * @param service_name the service name associated to the connection
+ * @param is_outbound the is this an outbound connection
+ */
+static inline void fill_resolved_name(netdata_socket_plot_t *ptr, char *hostname, size_t length,
+ char *service_name, int is_outbound)
+{
+ if (length < NETDATA_MAX_NETWORK_COMBINED_LENGTH)
+ ptr->resolved_name = strdupz(hostname);
+ else {
+ length = NETDATA_MAX_NETWORK_COMBINED_LENGTH;
+ ptr->resolved_name = mallocz( NETDATA_MAX_NETWORK_COMBINED_LENGTH + 1);
+ memcpy(ptr->resolved_name, hostname, length);
+ ptr->resolved_name[length] = '\0';
+ }
+
+ char dimname[CONFIG_MAX_NAME];
+ int size;
+ char *protocol;
+ if (ptr->sock.protocol == IPPROTO_UDP) {
+ protocol = "UDP";
+ } else if (ptr->sock.protocol == IPPROTO_TCP) {
+ protocol = "TCP";
+ } else {
+ protocol = "ALL";
+ }
+
+ if (is_outbound)
+ size = build_outbound_dimension_name(dimname, hostname, service_name, protocol, ptr->family);
+ else
+ size = build_inbound_dimension_name(dimname,service_name, protocol);
+
+ if (size > 0) {
+ strcpy(&dimname[size], "sent");
+ dimname[size + 4] = '\0';
+ ptr->dimension_sent = strdupz(dimname);
+
+ strcpy(&dimname[size], "recv");
+ ptr->dimension_recv = strdupz(dimname);
+
+ dimname[size - 1] = '\0';
+ ptr->dimension_retransmit = strdupz(dimname);
+ }
+}
+
+/**
+ * Mount dimension names
+ *
+ * Fill the vector names after to resolve the addresses
+ *
+ * @param ptr a pointer to the structure where the values are stored.
+ * @param is_outbound is a outbound ptr value?
+ *
+ * @return It returns 1 if the name is valid and 0 otherwise.
+ */
+int fill_names(netdata_socket_plot_t *ptr, int is_outbound)
+{
+ char hostname[NI_MAXHOST], service_name[NI_MAXSERV];
+ if (ptr->resolved)
+ return 1;
+
+ int ret;
+ static int resolve_name = -1;
+ static int resolve_service = -1;
+ if (resolve_name == -1)
+ resolve_name = network_viewer_opt.hostname_resolution_enabled;
+
+ if (resolve_service == -1)
+ resolve_service = network_viewer_opt.service_resolution_enabled;
+
+ netdata_socket_idx_t *idx = &ptr->index;
+
+ char *errname = { "Not resolved" };
+ // Resolve Name
+ if (ptr->family == AF_INET) { //IPV4
+ struct sockaddr_in myaddr;
+ memset(&myaddr, 0 , sizeof(myaddr));
+
+ myaddr.sin_family = ptr->family;
+ if (is_outbound) {
+ myaddr.sin_port = idx->dport;
+ myaddr.sin_addr.s_addr = idx->daddr.addr32[0];
+ } else {
+ myaddr.sin_port = idx->sport;
+ myaddr.sin_addr.s_addr = idx->saddr.addr32[0];
+ }
+
+ ret = (!resolve_name)?-1:getnameinfo((struct sockaddr *)&myaddr, sizeof(myaddr), hostname,
+ sizeof(hostname), service_name, sizeof(service_name), NI_NAMEREQD);
+
+ if (!ret && !resolve_service) {
+ snprintf(service_name, sizeof(service_name), "%u", ntohs(myaddr.sin_port));
+ }
+
+ if (ret) {
+ // I cannot resolve the name, I will use the IP
+ if (!inet_ntop(AF_INET, &myaddr.sin_addr.s_addr, hostname, NI_MAXHOST)) {
+ strncpy(hostname, errname, 13);
+ }
+
+ snprintf(service_name, sizeof(service_name), "%u", ntohs(myaddr.sin_port));
+ ret = 1;
+ }
+ } else { // IPV6
+ struct sockaddr_in6 myaddr6;
+ memset(&myaddr6, 0 , sizeof(myaddr6));
+
+ myaddr6.sin6_family = AF_INET6;
+ if (is_outbound) {
+ myaddr6.sin6_port = idx->dport;
+ memcpy(myaddr6.sin6_addr.s6_addr, idx->daddr.addr8, sizeof(union netdata_ip_t));
+ } else {
+ myaddr6.sin6_port = idx->sport;
+ memcpy(myaddr6.sin6_addr.s6_addr, idx->saddr.addr8, sizeof(union netdata_ip_t));
+ }
+
+ ret = (!resolve_name)?-1:getnameinfo((struct sockaddr *)&myaddr6, sizeof(myaddr6), hostname,
+ sizeof(hostname), service_name, sizeof(service_name), NI_NAMEREQD);
+
+ if (!ret && !resolve_service) {
+ snprintf(service_name, sizeof(service_name), "%u", ntohs(myaddr6.sin6_port));
+ }
+
+ if (ret) {
+ // I cannot resolve the name, I will use the IP
+ if (!inet_ntop(AF_INET6, myaddr6.sin6_addr.s6_addr, hostname, NI_MAXHOST)) {
+ strncpy(hostname, errname, 13);
+ }
+
+ snprintf(service_name, sizeof(service_name), "%u", ntohs(myaddr6.sin6_port));
+
+ ret = 1;
+ }
+ }
+
+ fill_resolved_name(ptr, hostname,
+ strlen(hostname) + strlen(service_name)+ NETDATA_DOTS_PROTOCOL_COMBINED_LENGTH,
+ service_name, is_outbound);
+
+ if (resolve_name && !ret)
+ ret = hostname_matches_pattern(hostname);
+
+ ptr->resolved++;
+
+ return ret;
+}
+
+/**
+ * Fill last Network Viewer Dimension
+ *
+ * Fill the unique dimension that is always plotted.
+ *
+ * @param ptr the pointer for the last dimension
+ * @param is_outbound is this an inbound structure?
+ */
+static void fill_last_nv_dimension(netdata_socket_plot_t *ptr, int is_outbound)
+{
+ char hostname[NI_MAXHOST], service_name[NI_MAXSERV];
+ char *other = { "other" };
+ // We are also copying the NULL bytes to avoid warnings in new compilers
+ strncpy(hostname, other, 6);
+ strncpy(service_name, other, 6);
+
+ ptr->family = AF_INET;
+ ptr->sock.protocol = 255;
+ ptr->flags = (!is_outbound)?NETDATA_INBOUND_DIRECTION:NETDATA_OUTBOUND_DIRECTION;
+
+ fill_resolved_name(ptr, hostname, 10 + NETDATA_DOTS_PROTOCOL_COMBINED_LENGTH, service_name, is_outbound);
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ info("Last %s dimension added: ID = %u, IP = OTHER, NAME = %s, DIM1 = %s, DIM2 = %s, DIM3 = %s",
+ (is_outbound)?"outbound":"inbound", network_viewer_opt.max_dim - 1, ptr->resolved_name,
+ ptr->dimension_recv, ptr->dimension_sent, ptr->dimension_retransmit);
+#endif
+}
+
+/**
+ * Update Socket Data
+ *
+ * Update the socket information with last collected data
+ *
+ * @param sock
+ * @param lvalues
+ */
+static inline void update_socket_data(netdata_socket_t *sock, netdata_socket_t *lvalues)
+{
+ sock->recv_packets += lvalues->recv_packets;
+ sock->sent_packets += lvalues->sent_packets;
+ sock->recv_bytes += lvalues->recv_bytes;
+ sock->sent_bytes += lvalues->sent_bytes;
+ sock->retransmit += lvalues->retransmit;
+
+ if (lvalues->ct > sock->ct)
+ sock->ct = lvalues->ct;
+}
+
+/**
+ * Store socket inside avl
+ *
+ * Store the socket values inside the avl tree.
+ *
+ * @param out the structure with information used to plot charts.
+ * @param lvalues Values read from socket ring.
+ * @param lindex the index information, the real socket.
+ * @param family the family associated to the socket
+ * @param flags the connection flags
+ */
+static void store_socket_inside_avl(netdata_vector_plot_t *out, netdata_socket_t *lvalues,
+ netdata_socket_idx_t *lindex, int family, uint32_t flags)
+{
+ netdata_socket_plot_t test, *ret ;
+
+ memcpy(&test.index, lindex, sizeof(netdata_socket_idx_t));
+ test.flags = flags;
+
+ ret = (netdata_socket_plot_t *) avl_search_lock(&out->tree, (avl *)&test);
+ if (ret) {
+ if (lvalues->ct > ret->plot.last_time) {
+ update_socket_data(&ret->sock, lvalues);
+ }
+ } else {
+ uint32_t curr = out->next;
+ uint32_t last = out->last;
+
+ netdata_socket_plot_t *w = &out->plot[curr];
+
+ int resolved;
+ if (curr == last) {
+ if (lvalues->ct > w->plot.last_time) {
+ update_socket_data(&w->sock, lvalues);
+ }
+ return;
+ } else {
+ memcpy(&w->sock, lvalues, sizeof(netdata_socket_t));
+ memcpy(&w->index, lindex, sizeof(netdata_socket_idx_t));
+ w->family = family;
+
+ resolved = fill_names(w, out != (netdata_vector_plot_t *)&inbound_vectors);
+ }
+
+ if (!resolved) {
+ freez(w->resolved_name);
+ freez(w->dimension_sent);
+ freez(w->dimension_recv);
+ freez(w->dimension_retransmit);
+
+ memset(w, 0, sizeof(netdata_socket_plot_t));
+
+ return;
+ }
+
+ w->flags = flags;
+ netdata_socket_plot_t *check ;
+ check = (netdata_socket_plot_t *) avl_insert_lock(&out->tree, (avl *)w);
+ if (check != w)
+ error("Internal error, cannot insert the AVL tree.");
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ char iptext[INET6_ADDRSTRLEN];
+ if (inet_ntop(family, &w->index.daddr.addr8, iptext, sizeof(iptext)))
+ info("New %s dimension added: ID = %u, IP = %s, NAME = %s, DIM1 = %s, DIM2 = %s, DIM3 = %s",
+ (out == &inbound_vectors)?"inbound":"outbound", curr, iptext, w->resolved_name,
+ w->dimension_recv, w->dimension_sent, w->dimension_retransmit);
+#endif
+ curr++;
+ if (curr > last)
+ curr = last;
+ out->next = curr;
+ }
+}
+
+/**
+ * Compare Vector to store
+ *
+ * Compare input values with local address to select table to store.
+ *
+ * @param direction store inbound and outbound direction.
+ * @param cmp index read from hash table.
+ * @param proto the protocol read.
+ *
+ * @return It returns the structure with address to compare.
+ */
+netdata_vector_plot_t * select_vector_to_store(uint32_t *direction, netdata_socket_idx_t *cmp, uint8_t proto)
+{
+ if (!listen_ports) {
+ *direction = NETDATA_OUTBOUND_DIRECTION;
+ return &outbound_vectors;
+ }
+
+ ebpf_network_viewer_port_list_t *move_ports = listen_ports;
+ while (move_ports) {
+ if (move_ports->protocol == proto && move_ports->first == cmp->sport) {
+ *direction = NETDATA_INBOUND_DIRECTION;
+ return &inbound_vectors;
+ }
+
+ move_ports = move_ports->next;
+ }
+
+ *direction = NETDATA_OUTBOUND_DIRECTION;
+ return &outbound_vectors;
+}
+
+/**
+ * Hash accumulator
+ *
+ * @param values the values used to calculate the data.
+ * @param key the key to store data.
+ * @param removesock check if this socket must be removed .
+ * @param family the connection family
+ * @param end the values size.
+ */
+static void hash_accumulator(netdata_socket_t *values, netdata_socket_idx_t *key, int *removesock, int family, int end)
+{
+ uint64_t bsent = 0, brecv = 0, psent = 0, precv = 0;
+ uint16_t retransmit = 0;
+ int i;
+ uint8_t protocol = values[0].protocol;
+ uint64_t ct = values[0].ct;
+ for (i = 1; i < end; i++) {
+ netdata_socket_t *w = &values[i];
+
+ precv += w->recv_packets;
+ psent += w->sent_packets;
+ brecv += w->recv_bytes;
+ bsent += w->sent_bytes;
+ retransmit += w->retransmit;
+
+ if (!protocol)
+ protocol = w->protocol;
+
+ if (w->ct > ct)
+ ct = w->ct;
+
+ *removesock += (int)w->removeme;
+ }
+
+ values[0].recv_packets += precv;
+ values[0].sent_packets += psent;
+ values[0].recv_bytes += brecv;
+ values[0].sent_bytes += bsent;
+ values[0].retransmit += retransmit;
+ values[0].removeme += (uint8_t)*removesock;
+ values[0].protocol = (!protocol)?IPPROTO_TCP:protocol;
+ values[0].ct = ct;
+
+ if (is_socket_allowed(key, family)) {
+ uint32_t dir;
+ netdata_vector_plot_t *table = select_vector_to_store(&dir, key, protocol);
+ store_socket_inside_avl(table, &values[0], key, family, dir);
+ }
+}
+
+/**
+ * Read socket hash table
+ *
+ * Read data from hash tables created on kernel ring.
+ *
+ * @param fd the hash table with data.
+ * @param family the family associated to the hash table
+ *
+ * @return it returns 0 on success and -1 otherwise.
+ */
+static void read_socket_hash_table(int fd, int family, int network_connection)
+{
+ if (wait_to_plot)
+ return;
+
+ netdata_socket_idx_t key = {};
+ netdata_socket_idx_t next_key;
+ netdata_socket_idx_t removeme;
+ int removesock = 0;
+
+ netdata_socket_t *values = socket_values;
+ size_t length = ebpf_nprocs*sizeof(netdata_socket_t);
+ int test, end = (running_on_kernel < NETDATA_KERNEL_V4_15) ? 1 : ebpf_nprocs;
+
+ while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
+ // We need to reset the values when we are working on kernel 4.15 or newer, because kernel does not create
+ // values for specific processor unless it is used to store data. As result of this behavior one the next socket
+ // can have values from the previous one.
+ memset(values, 0, length);
+ test = bpf_map_lookup_elem(fd, &key, values);
+ if (test < 0) {
+ key = next_key;
+ continue;
+ }
+
+ if (removesock)
+ bpf_map_delete_elem(fd, &removeme);
+
+ if (network_connection) {
+ removesock = 0;
+ hash_accumulator(values, &key, &removesock, family, end);
+ }
+
+ if (removesock)
+ removeme = key;
+
+ key = next_key;
+ }
+
+ if (removesock)
+ bpf_map_delete_elem(fd, &removeme);
+
+ test = bpf_map_lookup_elem(fd, &next_key, values);
+ if (test < 0) {
+ return;
+ }
+
+ if (network_connection) {
+ removesock = 0;
+ hash_accumulator(values, &next_key, &removesock, family, end);
+ }
+
+ if (removesock)
+ bpf_map_delete_elem(fd, &next_key);
+}
+
+/**
+ * Update listen table
+ *
+ * Update link list when it is necessary.
+ *
+ * @param value the ports we are listen to.
+ * @param proto the protocol used with port connection.
+ */
+void update_listen_table(uint16_t value, uint8_t proto)
+{
+ ebpf_network_viewer_port_list_t *w;
+ if (likely(listen_ports)) {
+ ebpf_network_viewer_port_list_t *move = listen_ports, *store = listen_ports;
+ while (move) {
+ if (move->protocol == proto && move->first == value)
+ return;
+
+ store = move;
+ move = move->next;
+ }
+
+ w = callocz(1, sizeof(ebpf_network_viewer_port_list_t));
+ w->first = value;
+ w->protocol = proto;
+ store->next = w;
+ } else {
+ w = callocz(1, sizeof(ebpf_network_viewer_port_list_t));
+ w->first = value;
+ w->protocol = proto;
+
+ listen_ports = w;
+ }
+
+#ifdef NETDATA_INTERNAL_CHECKS
+ info("The network viewer is monitoring inbound connections for port %u", ntohs(value));
+#endif
+}
+
+/**
+ * Read listen table
+ *
+ * Read the table with all ports that we are listen on host.
+ */
+static void read_listen_table()
+{
+ uint16_t key = 0;
+ uint16_t next_key;
+
+ int fd = map_fd[NETDATA_SOCKET_LISTEN_TABLE];
+ uint8_t value;
+ while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
+ int test = bpf_map_lookup_elem(fd, &key, &value);
+ if (test < 0) {
+ key = next_key;
+ continue;
+ }
+
+ // The correct protocol must come from kernel
+ update_listen_table(htons(key), (key == 53)?IPPROTO_UDP:IPPROTO_TCP);
+
+ key = next_key;
+ }
+
+ if (next_key) {
+ // The correct protocol must come from kernel
+ update_listen_table(htons(next_key), (key == 53)?IPPROTO_UDP:IPPROTO_TCP);
+ }
+}
+
+/**
+ * Socket read hash
+ *
+ * This is the thread callback.
+ * This thread is necessary, because we cannot freeze the whole plugin to read the data on very busy socket.
+ *
+ * @param ptr It is a NULL value for this thread.
+ *
+ * @return It always returns NULL.
+ */
+void *ebpf_socket_read_hash(void *ptr)
+{
+ ebpf_module_t *em = (ebpf_module_t *)ptr;
+
+ read_thread_closed = 0;
+ heartbeat_t hb;
+ heartbeat_init(&hb);
+ usec_t step = NETDATA_SOCKET_READ_SLEEP_MS;
+ int fd_ipv4 = map_fd[NETDATA_SOCKET_IPV4_HASH_TABLE];
+ int fd_ipv6 = map_fd[NETDATA_SOCKET_IPV6_HASH_TABLE];
+ int network_connection = em->optional;
+ while (!close_ebpf_plugin) {
+ usec_t dt = heartbeat_next(&hb, step);
+ (void)dt;
+
+ pthread_mutex_lock(&nv_mutex);
+ read_listen_table();
+ read_socket_hash_table(fd_ipv4, AF_INET, network_connection);
+ read_socket_hash_table(fd_ipv6, AF_INET6, network_connection);
+ wait_to_plot = 1;
+ pthread_mutex_unlock(&nv_mutex);
+ }
+
+ read_thread_closed = 1;
+ return NULL;
+}
+
+/**
+ * Read the hash table and store data to allocated vectors.
+ */
+static void read_hash_global_tables()
+{
+ uint64_t idx;
+ netdata_idx_t res[NETDATA_SOCKET_COUNTER];
+
+ netdata_idx_t *val = socket_hash_values;
+ int fd = map_fd[NETDATA_SOCKET_GLOBAL_HASH_TABLE];
+ for (idx = 0; idx < NETDATA_SOCKET_COUNTER; idx++) {
+ if (!bpf_map_lookup_elem(fd, &idx, val)) {
+ uint64_t total = 0;
+ int i;
+ int end = (running_on_kernel < NETDATA_KERNEL_V4_15) ? 1 : ebpf_nprocs;
+ for (i = 0; i < end; i++)
+ total += val[i];
+
+ res[idx] = total;
+ } else {
+ res[idx] = 0;
+ }
+ }
+
+ socket_aggregated_data[0].call = res[NETDATA_KEY_CALLS_TCP_SENDMSG];
+ socket_aggregated_data[1].call = res[NETDATA_KEY_CALLS_TCP_CLEANUP_RBUF];
+ socket_aggregated_data[2].call = res[NETDATA_KEY_CALLS_TCP_CLOSE];
+ socket_aggregated_data[3].call = res[NETDATA_KEY_CALLS_UDP_RECVMSG];
+ socket_aggregated_data[4].call = res[NETDATA_KEY_CALLS_UDP_SENDMSG];
+ socket_aggregated_data[5].call = res[NETDATA_KEY_TCP_RETRANSMIT];
+
+ socket_aggregated_data[0].ecall = res[NETDATA_KEY_ERROR_TCP_SENDMSG];
+ socket_aggregated_data[1].ecall = res[NETDATA_KEY_ERROR_TCP_CLEANUP_RBUF];
+ socket_aggregated_data[3].ecall = res[NETDATA_KEY_ERROR_UDP_RECVMSG];
+ socket_aggregated_data[4].ecall = res[NETDATA_KEY_ERROR_UDP_SENDMSG];
+
+ socket_aggregated_data[0].bytes = res[NETDATA_KEY_BYTES_TCP_SENDMSG];
+ socket_aggregated_data[1].bytes = res[NETDATA_KEY_BYTES_TCP_CLEANUP_RBUF];
+ socket_aggregated_data[3].bytes = res[NETDATA_KEY_BYTES_UDP_RECVMSG];
+ socket_aggregated_data[4].bytes = res[NETDATA_KEY_BYTES_UDP_SENDMSG];
+}
+
+/**
+ * Fill publish apps when necessary.
+ *
+ * @param current_pid the PID that I am updating
+ * @param eb the structure with data read from memory.
+ */
+void ebpf_socket_fill_publish_apps(uint32_t current_pid, ebpf_bandwidth_t *eb)
+{
+ ebpf_socket_publish_apps_t *curr = socket_bandwidth_curr[current_pid];
+ if (!curr) {
+ curr = callocz(1, sizeof(ebpf_socket_publish_apps_t));
+ socket_bandwidth_curr[current_pid] = curr;
+ }
+
+ curr->bytes_sent = eb->bytes_sent;
+ curr->bytes_received = eb->bytes_received;
+ curr->call_tcp_sent = eb->call_tcp_sent;
+ curr->call_tcp_received = eb->call_tcp_received;
+ curr->retransmit = eb->retransmit;
+ curr->call_udp_sent = eb->call_udp_sent;
+ curr->call_udp_received = eb->call_udp_received;
+}
+
+/**
+ * Bandwidth accumulator.
+ *
+ * @param out the vector with the values to sum
+ */
+void ebpf_socket_bandwidth_accumulator(ebpf_bandwidth_t *out)
+{
+ int i, end = (running_on_kernel >= NETDATA_KERNEL_V4_15) ? ebpf_nprocs : 1;
+ ebpf_bandwidth_t *total = &out[0];
+ for (i = 1; i < end; i++) {
+ ebpf_bandwidth_t *move = &out[i];
+ total->bytes_sent += move->bytes_sent;
+ total->bytes_received += move->bytes_received;
+ total->call_tcp_sent += move->call_tcp_sent;
+ total->call_tcp_received += move->call_tcp_received;
+ total->retransmit += move->retransmit;
+ total->call_udp_sent += move->call_udp_sent;
+ total->call_udp_received += move->call_udp_received;
+ }
+}
+
+/**
+ * Update the apps data reading information from the hash table
+ */
+static void ebpf_socket_update_apps_data()
+{
+ int fd = map_fd[NETDATA_SOCKET_APPS_HASH_TABLE];
+ ebpf_bandwidth_t *eb = bandwidth_vector;
+ uint32_t key;
+ struct pid_stat *pids = root_of_pids;
+ while (pids) {
+ key = pids->pid;
+
+ if (bpf_map_lookup_elem(fd, &key, eb)) {
+ pids = pids->next;
+ continue;
+ }
+
+ ebpf_socket_bandwidth_accumulator(eb);
+
+ ebpf_socket_fill_publish_apps(key, eb);
+
+ pids = pids->next;
+ }
+}
+
+/*****************************************************************
+ *
+ * FUNCTIONS WITH THE MAIN LOOP
+ *
+ *****************************************************************/
+
+struct netdata_static_thread socket_threads = {"EBPF SOCKET READ",
+ NULL, NULL, 1, NULL,
+ NULL, ebpf_socket_read_hash };
+
+/**
+ * Main loop for this collector.
+ *
+ * @param step the number of microseconds used with heart beat
+ * @param em the structure with thread information
+ */
+static void socket_collector(usec_t step, ebpf_module_t *em)
+{
+ UNUSED(em);
+ UNUSED(step);
+ heartbeat_t hb;
+ heartbeat_init(&hb);
+
+ socket_threads.thread = mallocz(sizeof(netdata_thread_t));
+
+ netdata_thread_create(socket_threads.thread, socket_threads.name,
+ NETDATA_THREAD_OPTION_JOINABLE, ebpf_socket_read_hash, em);
+
+ int socket_apps_enabled = ebpf_modules[EBPF_MODULE_SOCKET_IDX].apps_charts;
+ int socket_global_enabled = ebpf_modules[EBPF_MODULE_SOCKET_IDX].global_charts;
+ int network_connection = em->optional;
+ while (!close_ebpf_plugin) {
+ pthread_mutex_lock(&collect_data_mutex);
+ pthread_cond_wait(&collect_data_cond_var, &collect_data_mutex);
+
+ if (socket_global_enabled)
+ read_hash_global_tables();
+
+ if (socket_apps_enabled)
+ ebpf_socket_update_apps_data();
+
+ calculate_nv_plot();
+
+ pthread_mutex_lock(&lock);
+ if (socket_global_enabled)
+ ebpf_socket_send_data(em);
+
+ if (socket_apps_enabled)
+ ebpf_socket_send_apps_data(em, apps_groups_root_target);
+
+ fflush(stdout);
+
+ if (network_connection) {
+ // We are calling fflush many times, because when we have a lot of dimensions
+ // we began to have not expected outputs and Netdata closed the plugin.
+ pthread_mutex_lock(&nv_mutex);
+ ebpf_socket_create_nv_charts(&inbound_vectors);
+ fflush(stdout);
+ ebpf_socket_send_nv_data(&inbound_vectors);
+
+ ebpf_socket_create_nv_charts(&outbound_vectors);
+ fflush(stdout);
+ ebpf_socket_send_nv_data(&outbound_vectors);
+ wait_to_plot = 0;
+ pthread_mutex_unlock(&nv_mutex);
+
+ }
+
+ pthread_mutex_unlock(&collect_data_mutex);
+ pthread_mutex_unlock(&lock);
+
+ }
+}
+
+/*****************************************************************
+ *
+ * FUNCTIONS TO CLOSE THE THREAD
+ *
+ *****************************************************************/
+
+
+/**
+ * Clean internal socket plot
+ *
+ * Clean all structures allocated with strdupz.
+ *
+ * @param ptr the pointer with addresses to clean.
+ */
+static inline void clean_internal_socket_plot(netdata_socket_plot_t *ptr)
+{
+ freez(ptr->dimension_recv);
+ freez(ptr->dimension_sent);
+ freez(ptr->resolved_name);
+ freez(ptr->dimension_retransmit);
+}
+
+/**
+ * Clean socket plot
+ *
+ * Clean the allocated data for inbound and outbound vectors.
+ */
+static void clean_allocated_socket_plot()
+{
+ uint32_t i;
+ uint32_t end = inbound_vectors.last;
+ netdata_socket_plot_t *plot = inbound_vectors.plot;
+ for (i = 0; i < end; i++) {
+ clean_internal_socket_plot(&plot[i]);
+ }
+
+ clean_internal_socket_plot(&plot[inbound_vectors.last]);
+
+ end = outbound_vectors.last;
+ plot = outbound_vectors.plot;
+ for (i = 0; i < end; i++) {
+ clean_internal_socket_plot(&plot[i]);
+ }
+ clean_internal_socket_plot(&plot[outbound_vectors.last]);
+}
+
+/**
+ * Clean netowrk ports allocated during initializaion.
+ *
+ * @param ptr a pointer to the link list.
+ */
+static void clean_network_ports(ebpf_network_viewer_port_list_t *ptr)
+{
+ if (unlikely(!ptr))
+ return;
+
+ while (ptr) {
+ ebpf_network_viewer_port_list_t *next = ptr->next;
+ freez(ptr->value);
+ freez(ptr);
+ ptr = next;
+ }
+}
+
+/**
+ * Clean service names
+ *
+ * Clean the allocated link list that stores names.
+ *
+ * @param names the link list.
+ */
+static void clean_service_names(ebpf_network_viewer_dim_name_t *names)
+{
+ if (unlikely(!names))
+ return;
+
+ while (names) {
+ ebpf_network_viewer_dim_name_t *next = names->next;
+ freez(names->name);
+ freez(names);
+ names = next;
+ }
+}
+
+/**
+ * Clean hostnames
+ *
+ * @param hostnames the hostnames to clean
+ */
+static void clean_hostnames(ebpf_network_viewer_hostname_list_t *hostnames)
+{
+ if (unlikely(!hostnames))
+ return;
+
+ while (hostnames) {
+ ebpf_network_viewer_hostname_list_t *next = hostnames->next;
+ freez(hostnames->value);
+ simple_pattern_free(hostnames->value_pattern);
+ freez(hostnames);
+ hostnames = next;
+ }
+}
+
+void clean_thread_structures() {
+ struct pid_stat *pids = root_of_pids;
+ while (pids) {
+ freez(socket_bandwidth_curr[pids->pid]);
+
+ pids = pids->next;
+ }
+}
+
+/**
+ * Clean up the main thread.
+ *
+ * @param ptr thread data.
+ */
+static void ebpf_socket_cleanup(void *ptr)
+{
+ ebpf_module_t *em = (ebpf_module_t *)ptr;
+ if (!em->enabled)
+ return;
+
+ heartbeat_t hb;
+ heartbeat_init(&hb);
+ uint32_t tick = 2*USEC_PER_MS;
+ while (!read_thread_closed) {
+ usec_t dt = heartbeat_next(&hb, tick);
+ UNUSED(dt);
+ }
+
+ freez(socket_aggregated_data);
+ ebpf_cleanup_publish_syscall(socket_publish_aggregated);
+ freez(socket_publish_aggregated);
+ freez(socket_hash_values);
+
+ clean_thread_structures();
+ freez(socket_bandwidth_curr);
+ freez(bandwidth_vector);
+
+ freez(socket_values);
+ clean_allocated_socket_plot();
+ freez(inbound_vectors.plot);
+ freez(outbound_vectors.plot);
+
+ clean_port_structure(&listen_ports);
+
+ ebpf_modules[EBPF_MODULE_SOCKET_IDX].enabled = 0;
+
+ clean_network_ports(network_viewer_opt.included_port);
+ clean_network_ports(network_viewer_opt.excluded_port);
+ clean_service_names(network_viewer_opt.names);
+ clean_hostnames(network_viewer_opt.included_hostnames);
+ clean_hostnames(network_viewer_opt.excluded_hostnames);
+
+ pthread_mutex_destroy(&nv_mutex);
+ freez(socket_data.map_fd);
+
+ freez(socket_threads.thread);
+
+ struct bpf_program *prog;
+ size_t i = 0 ;
+ bpf_object__for_each_program(prog, objects) {
+ bpf_link__destroy(probe_links[i]);
+ i++;
+ }
+ bpf_object__close(objects);
+ finalized_threads = 1;
+}
+
+/*****************************************************************
+ *
+ * FUNCTIONS TO START THREAD
+ *
+ *****************************************************************/
+
+/**
+ * Allocate vectors used with this thread.
+ * We are not testing the return, because callocz does this and shutdown the software
+ * case it was not possible to allocate.
+ *
+ * @param length is the length for the vectors used inside the collector.
+ */
+static void ebpf_socket_allocate_global_vectors(size_t length)
+{
+ socket_aggregated_data = callocz(length, sizeof(netdata_syscall_stat_t));
+ socket_publish_aggregated = callocz(length, sizeof(netdata_publish_syscall_t));
+ socket_hash_values = callocz(ebpf_nprocs, sizeof(netdata_idx_t));
+
+ socket_bandwidth_curr = callocz((size_t)pid_max, sizeof(ebpf_socket_publish_apps_t *));
+ bandwidth_vector = callocz((size_t)ebpf_nprocs, sizeof(ebpf_bandwidth_t));
+
+ socket_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_socket_t));
+ inbound_vectors.plot = callocz(network_viewer_opt.max_dim, sizeof(netdata_socket_plot_t));
+ outbound_vectors.plot = callocz(network_viewer_opt.max_dim, sizeof(netdata_socket_plot_t));
+}
+
+/**
+ * Set local function pointers, this function will never be compiled with static libraries
+ */
+static void set_local_pointers()
+{
+ map_fd = socket_data.map_fd;
+}
+
+/**
+ * Initialize Inbound and Outbound
+ *
+ * Initialize the common outbound and inbound sockets.
+ */
+static void initialize_inbound_outbound()
+{
+ inbound_vectors.last = network_viewer_opt.max_dim - 1;
+ outbound_vectors.last = inbound_vectors.last;
+ fill_last_nv_dimension(&inbound_vectors.plot[inbound_vectors.last], 0);
+ fill_last_nv_dimension(&outbound_vectors.plot[outbound_vectors.last], 1);
+}
+
+/*****************************************************************
+ *
+ * EBPF SOCKET THREAD
+ *
+ *****************************************************************/
+
+/**
+ * Socket thread
+ *
+ * Thread used to generate socket charts.
+ *
+ * @param ptr a pointer to `struct ebpf_module`
+ *
+ * @return It always return NULL
+ */
+void *ebpf_socket_thread(void *ptr)
+{
+ netdata_thread_cleanup_push(ebpf_socket_cleanup, ptr);
+
+ avl_init_lock(&inbound_vectors.tree, compare_sockets);
+ avl_init_lock(&outbound_vectors.tree, compare_sockets);
+
+ ebpf_module_t *em = (ebpf_module_t *)ptr;
+ fill_ebpf_data(&socket_data);
+
+ if (!em->enabled)
+ goto endsocket;
+
+ if (pthread_mutex_init(&nv_mutex, NULL)) {
+ error("Cannot initialize local mutex");
+ goto endsocket;
+ }
+ pthread_mutex_lock(&lock);
+
+ ebpf_socket_allocate_global_vectors(NETDATA_MAX_SOCKET_VECTOR);
+ initialize_inbound_outbound();
+
+ if (ebpf_update_kernel(&socket_data)) {
+ pthread_mutex_unlock(&lock);
+ goto endsocket;
+ }
+
+ set_local_pointers();
+ probe_links = ebpf_load_program(ebpf_plugin_dir, em, kernel_string, &objects, socket_data.map_fd);
+ if (!probe_links) {
+ pthread_mutex_unlock(&lock);
+ goto endsocket;
+ }
+
+ int algorithms[NETDATA_MAX_SOCKET_VECTOR] = {
+ NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX,
+ NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX, NETDATA_EBPF_ABSOLUTE_IDX
+ };
+ ebpf_global_labels(
+ socket_aggregated_data, socket_publish_aggregated, socket_dimension_names, socket_id_names,
+ algorithms, NETDATA_MAX_SOCKET_VECTOR);
+
+ ebpf_create_global_charts(em);
+
+ finalized_threads = 0;
+ pthread_mutex_unlock(&lock);
+
+ socket_collector((usec_t)(em->update_time * USEC_PER_SEC), em);
+
+endsocket:
+ netdata_thread_cleanup_pop(1);
+ return NULL;
+}