133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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#include "configfile.h"
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#include "helper.h"
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#include "list.h"
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#include "logging.h"
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#include "network.h"
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#include "plugins.h"
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#include "rrdtool.h"
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#define BUFSIZE 8192
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static struct sockaddr_in fwd_sa;
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static int fwd_sock;
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// todo: never freed..
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static char *tx_buf, *rx_buf;
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static int tx_pos;
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int net_submit(char *hostname, char *plugin, char *filename, int ds_id, char *data)
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{
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int size = snprintf(tx_buf + tx_pos, BUFSIZE - tx_pos, "%s:%s:%s:%d %s\n",
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hostname, plugin, filename, ds_id, data);
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if (size < 0 || size >= BUFSIZE - tx_pos) {
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log_print(LOG_ERROR, "net_submit(): arguments too long");
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// TODO: retry with flushed buffer?
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return -1;
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}
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tx_pos += size;
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return 0;
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}
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int net_submit_flush()
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{
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if (tx_pos != 0)
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sendto(fwd_sock, tx_buf, tx_pos, 0, (struct sockaddr *)&fwd_sa, sizeof(fwd_sa));
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tx_pos = 0;
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return 0;
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}
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int net_receive(int socket)
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{
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int size = recv(socket, rx_buf, BUFSIZE, 0);
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int rx_pos = 0;
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char *delim;
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while ((delim = memchr(rx_buf + rx_pos, '\n', size - rx_pos))) {
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*delim = '\0';
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char *data[2], *part[4];
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int ret = strsplit(rx_buf + rx_pos, " ", data, 2);
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if (ret != 2) {
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log_print(LOG_ERROR, "net_receive() abort data-split");
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continue;
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}
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ret = strsplit(data[0], ":", part, 4);
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if (ret != 4) {
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log_print(LOG_ERROR, "net_receive() abort header-split");
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continue;
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}
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rrd_submit(part[0], part[1], part[2], atoi(part[3]), data[1]);
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rx_pos = (delim - rx_buf) +1;
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}
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return 0;
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}
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int net_init_cli()
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{
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int ret = config_get_saddr("global", "forward", &fwd_sa);
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if (ret < 0)
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return -1;
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tx_buf = malloc(BUFSIZE);
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if (tx_buf == NULL) {
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log_print(LOG_ERROR, "net_init_cli(): out of memory");
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return -1;
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}
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tx_pos = 0;
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fwd_sock = socket(PF_INET, SOCK_DGRAM, 0);
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if (fwd_sock < 0) {
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log_print(LOG_ERROR, "net_init_cli(): socket()");
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return -1;
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}
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log_print(LOG_INFO, "forwarding to %s:%d", inet_ntoa(fwd_sa.sin_addr), ntohs(fwd_sa.sin_port));
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return 0;
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}
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int net_init_srv()
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{
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struct sockaddr_in sa_srv;
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int ret = config_get_saddr("global", "listen", &sa_srv);
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if (ret < 0)
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return -1;
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int srv_sock = socket(PF_INET, SOCK_DGRAM, 0);
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if (srv_sock < 0) {
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log_print(LOG_ERROR, "net_init_src(): socket()");
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return -1;
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}
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if (bind(srv_sock, (struct sockaddr *)&sa_srv, sizeof(sa_srv)) < 0) {
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log_print(LOG_ERROR, "net_init_src(): bind()");
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close(srv_sock);
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return -1;
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}
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rx_buf = malloc(BUFSIZE);
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if (rx_buf == NULL) {
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log_print(LOG_ERROR, "net_init_srv(): out of memory");
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close(srv_sock);
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return -1;
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}
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log_print(LOG_INFO, "listen on %s:%d", inet_ntoa(sa_srv.sin_addr), ntohs(sa_srv.sin_port));
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return srv_sock;
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}
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