/*********************************************************************************
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* Copyright: (C) 2018 LingYun IoT Studio
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* All rights reserved.
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*
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* Filename: ddns_client.c
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* Description: This is a ddns client code to report public IP address to
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* server, it just need to send the domain name, and server
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* can get its public IP address.
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*
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* Version: 1.0.0(1/1/2019)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "2019-1-1 01:38:08 PM"
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*
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********************************************************************************/
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <getopt.h>
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#include <libgen.h>
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#include "iniparser.h"
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#define MAX_HOSTS 3
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#define PROG_VERSION "v1.0.0"
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int socket_send_domain(char *serverip, int port, char *msg);
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static void program_usage(char *progname)
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{
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printf("Usage: %s [OPTION]...\n", progname);
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printf(" %s is LingYun studio DDNS client program to report public IP address\n", progname);
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printf("\nMandatory arguments to long options are mandatory for short options too:\n");
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printf(" -c[conf ] Specify configure file\n");
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printf(" -h[help ] Display this help information\n");
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printf(" -v[version ] Display the program version\n");
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printf("\n%s version %s\n", progname, PROG_VERSION); return;
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}
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int main(int argc, char **argv)
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{
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char *conf_file = "./ddns.conf";
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char *progname=NULL;
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int opt;
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dictionary *ini;
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char *str;
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int val;
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char *domain;
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char *id;
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char *serverip;
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int port;
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int i;
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char key[64];
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char msg[512];
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struct option long_options[] = {
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{"conf", required_argument, NULL, 'c'},
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{"version", no_argument, NULL, 'v'},
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{"help", no_argument, NULL, 'h'},
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{NULL, 0, NULL, 0}
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};
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progname = (char *)basename(argv[0]);
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/* Parser the command line parameters */
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while ((opt = getopt_long(argc, argv, "c:dvh", long_options, NULL)) != -1)
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{
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switch (opt)
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{
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case 'c': /* Set configure file */
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conf_file = optarg;
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break;
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case 'v': /* Get software version */
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printf("%s version %s\n", progname, PROG_VERSION);
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return 0;
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case 'h': /* Get help information */
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program_usage(progname);
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return 0;
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default:
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break;
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}
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}
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ini = iniparser_load(conf_file);
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if( !ini )
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{
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printf("ERROR: cannot parse file: '%s'\n", conf_file);
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return -1;
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}
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id=iniparser_getstring(ini, "common:id", NULL);
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domain=iniparser_getstring(ini, "common:domain", NULL);
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if( !domain )
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{
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printf("ERROR: cannot parse domain/id in '%s'\n", conf_file);
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return -1;
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}
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memset(msg, 0, sizeof(msg));
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snprintf(msg, sizeof(msg), "[%s]: '%s'", id, domain);
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for(i=0; i<MAX_HOSTS; i++)
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{
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memset(key, 0, sizeof(key));
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snprintf(key, sizeof(key), "host%d:ip", i);
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serverip = iniparser_getstring(ini, key, NULL);
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snprintf(key, sizeof(key), "host%d:port", i);
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port = iniparser_getint(ini, key, 0);
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if( !serverip || !port )
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{
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continue;
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}
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printf("==> Start send domain '%s' to [%s:%d]\n", domain, serverip, port);
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socket_send_domain(serverip, port, msg);
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printf("\n");
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}
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iniparser_freedict(ini);
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}
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int socket_send_domain(char *serverip, int port, char *msg)
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{
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int conn_fd = -1;
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int rv = -1;
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struct sockaddr_in serv_addr;
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struct sockaddr_in addr;
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struct timeval timeo = {6, 0};
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socklen_t len = sizeof(timeo);
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conn_fd = socket(AF_INET, SOCK_STREAM, 0);
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if(conn_fd < 0)
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{
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printf("ERROR: create socket failure: %s\n", strerror(errno));
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return -1;
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}
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memset(&serv_addr, 0, sizeof(serv_addr));
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_port = htons(port);
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inet_aton( serverip, &serv_addr.sin_addr );
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setsockopt(conn_fd, SOL_SOCKET, SO_SNDTIMEO, &timeo, len);
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if( connect(conn_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
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{
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printf("ERROR: connect to server [%s:%d] failure: %s\n", serverip, port, strerror(errno));
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goto cleanup;
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}
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if( write(conn_fd, msg, strlen(msg)) < 0 )
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{
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printf("ERROR: Write data to server [%s:%d] failure: %s\n", serverip, port, strerror(errno));
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goto cleanup;
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}
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printf("ok\n");
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sleep(1);
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cleanup:
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close(conn_fd);
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}
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