initial version
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gohigh
196
homeip/homeipd2.c
Executable file
196
homeip/homeipd2.c
Executable file
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/* Name: homeipd.c
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Desc: a server program coupled with the client program homeipc.c
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location: /usr/bin/
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conf file: /etc/homeipd.conf
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output file: /var/www/website/homeip.txt
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Version: 0.1
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Jiong.zhao@tongji.edu.cn
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2017.11.13
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <time.h>
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#include <netinet/in.h>
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#include <sys/stat.h>
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#include <arpa/inet.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "iniparser.h"
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/* 1. Read in the canonical string lines in the config file /etc/homeipd.conf file to
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the array homeids[128, 256], and check the output file /var/www/website/homeip.txt.
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If the config file does not exists, 10 default strings will be used:
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"My_home_ip_please_00" to "My_home_ip_please_10".
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The output file /var/www/website/homeip.txt will be created if it does not exist.
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2. Establish network link and listen to the port 55535. If a message string is received,
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it is compared with the strings in array homeids[]. If the received string is actually
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contained in the string array homeids[], then the link's source IP will be obtained
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and stored in the output file with the string in a line.
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*/
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// Get Home IP -- GHI_
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#define GHI_INI_FILE "/etc/homeip.ini"
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#define SEC_SERVER "server" // Should be lower chars!!
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#define GHI_PORT "55535"
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#define GHI_OUT_FILE "/var/www/homepage/oldlinux.org/homeip.txt"
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#define SEC_CLIENTS "clients" // Should be lower chars!!
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#define GHI_STR0 "My_home_ip_please_00"
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#define GHI_STR1 "My_home_ip_please_01"
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dictionary *inifd;
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int ghi_port;
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char *ghi_out_file = GHI_OUT_FILE;
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char **ghi_strs;
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int ghi_strs_num;
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int parse_ini_file(char *ini_name);
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void create_ini_file(char *ini_name);
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int main(int argc, char **argv)
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{
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socklen_t len;
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int listenfd, connfd, n;
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char buff[4096], buff1[4096];
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struct sockaddr_in servaddr, cliaddr;
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time_t ticks;
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int outfd;
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int curr;
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char *def_str, *cli_str;
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char **pptr;
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printf("Get Home IP address Server.\nVersion 0.3 \nby Jiong.Zhao@tongji.edu.cn \n------\n");
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if ((parse_ini_file(GHI_INI_FILE)) < 0)
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exit(1);
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printf("Begin networking...\n");
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listenfd = socket(AF_INET, SOCK_STREAM, 0);
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bzero(&servaddr, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
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servaddr.sin_port = htons(ghi_port);
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bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
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listen(listenfd, 1024);
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for (;;) {
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len = sizeof(cliaddr);
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connfd = accept(listenfd, (struct sockaddr *)&cliaddr, &len);
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if (( n = read(connfd, buff, 4097)) > 0) { // while
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buff[n] = 0;
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pptr = ghi_strs;
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for (curr = 0; curr < ghi_strs_num; curr++) {
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def_str = *pptr++;
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cli_str = iniparser_getstring(inifd, def_str, NULL);
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if ( !strncmp(cli_str, buff, n)) {
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/* // */ printf("key & val: %s, %s\n", def_str, cli_str);
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if ((outfd = open(ghi_out_file, O_WRONLY | O_CREAT | O_APPEND,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == -1) {
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printf("Error open file: %s.\n", ghi_out_file);
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exit(1);
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} else {
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inet_ntop(AF_INET, &cliaddr.sin_addr, buff1, sizeof(buff1));
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ticks = time(NULL);
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sprintf(buff, "%.24s, %s, %s\n", ctime(&ticks), def_str, buff1);
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write(outfd, buff, strlen(buff));
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close(outfd);
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}
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}
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}
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close(connfd);
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}
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else close(connfd);
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}
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}
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int parse_ini_file(char *ini_name)
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{
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int i, n = 0;
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char *sec_name = SEC_CLIENTS;
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char *def_str = GHI_STR0;
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char **pptr;
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inifd = iniparser_load(ini_name);
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printf("Begining parse ini_file: %s\n", ini_name);
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if (inifd == NULL) {
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printf( "Ini file not found: %s, auto created. \n", ini_name);
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create_ini_file(ini_name);
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inifd = iniparser_load(ini_name);
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if (inifd == NULL) {
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fprintf(stderr, " Error creating ini file: %s !\n", ini_name);
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return -1;
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}
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}
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ghi_port = iniparser_getint(inifd, "Server:port", -1);
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if (ghi_port < 80) {
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fprintf(stderr, "Server Port not correct: %d\n", ghi_port);
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return -1;
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}
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printf("network port: %d\n", ghi_port);
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ghi_out_file = iniparser_getstring(inifd, "Server:OutputFile", NULL);
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if (ghi_out_file == NULL) {
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fprintf(stderr, "Output file error. \n");
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return -1;
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}
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printf("Output file: %s\n", ghi_out_file);
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n = iniparser_getsecnkeys(inifd, SEC_CLIENTS);
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if (n == 0) {
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fprintf(stderr, "No user present.\n");
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return -1;
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} else {
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printf("Clients: %d\n", n);
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ghi_strs_num = n;
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ghi_strs = iniparser_getseckeys(inifd, SEC_CLIENTS);
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pptr = ghi_strs;
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for (i=0; i< ghi_strs_num; i++) {
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def_str = *pptr++;
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printf("%s\n", def_str);
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}
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}
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return 0;
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}
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void create_ini_file(char *ini_name)
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{
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FILE *ini;
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printf("Begining create_ini_file ... \n");
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ini = fopen(ini_name, "w");
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fprintf(ini,
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"#\n"
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"# The ini file for get home ip program server.\n"
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"#\n"
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"\n"
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"[Server]\n"
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"Port = "
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GHI_PORT
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"\n"
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"OutputFile = "
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GHI_OUT_FILE
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"\n"
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"\n"
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"\n"
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"[Clients]\n"
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"PassString0 = "
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GHI_STR0
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"\n"
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"PassString1 = "
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GHI_STR1
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"\n"
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"\n");
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fclose(ini);
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}
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