首先放上c代码

/*
# This is a simple linux command line utility to execute rcon commands
# Just change the YOUR_PASSWORD_HERE to your rcon password (unless
# you want to enter it every time) and possibly change the default
# IP address from 127.0.0.1 (localhost)
#
# once downloaded on your linux system, compile it with:
#
#   gcc -o rcon rcon.c
#
# note, it should work on non-linux too, but may require changing the 
# socket stuff (i.e. windows will definitely need to add the winsock
# initialization line)
#
# written by [ASY]Zyrain
#
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <string.h>#define DEBUG 0#define SERVERDATA_EXECCOMMAND 2
#define SERVERDATA_AUTH 3
#define SERVERDATA_RESPONSE_VALUE 0
#define SERVERDATA_AUTH_RESPONSE 2int send_rcon(int sock, int id, int command, char *string1, char *string2) {int size, ret;size = 10+strlen(string1)+strlen(string2);ret = send(sock,&size,sizeof(int),0);if(ret == -1) {perror("send() failed:");return -1;}ret = send(sock,&id,sizeof(int),0);if(ret == -1) {perror("send() failed:");return -1;}ret = send(sock,&command,sizeof(int),0);if(ret == -1) {perror("send() failed:");return -1;}ret = send(sock,string1,strlen(string1)+1,0);if(ret == -1) {perror("send() failed:");return -1;}ret = send(sock,string2,strlen(string2)+1,0);if(ret == -1) {perror("send() failed:");return -1;}if(DEBUG) printf("Sent %d bytes\n",size+4);return 0;
}int recv_rcon(int sock, int timeout, int *id, int *command, char *string1,char *string2) {struct timeval tv;fd_set readfds;int size;char *ptr;int ret;char buf[8192];size=0xDEADBEEF;*id=0xDEADBEEF;*command=0xDEADBEEF;string1[0]=0;string2[0]=0;tv.tv_sec = timeout;tv.tv_usec = 0;FD_ZERO(&readfds);FD_SET(sock, &readfds);/* don't care about writefds and exceptfds: */select(sock+1, &readfds, NULL, NULL, &tv);if (!FD_ISSET(sock, &readfds)) {if(DEBUG) { printf("recv timeout\n");}return -1; // timeout}if(DEBUG) printf("Got a response\n");ret = recv(sock, &size, sizeof(int), 0);if(ret == -1) {perror("recv() failed:");return -1;}if((size<10) || (size>8192)) {printf("Illegal size %d\n",size);exit(-1);}ret = recv(sock, id, sizeof(int),0);if(ret == -1) {perror("recv() failed:");return -1;}size-=ret;ret = recv(sock, command, sizeof(int),0);if(ret == -1) {perror("recv() failed:");return -1;}size-=ret;ptr = buf;while(size) {ret = recv(sock, ptr, size, 0);if(ret == -1) {perror("recv() failed:");return -1;}size -= ret; ptr += ret;}buf[8190] = 0;buf[8191] = 0;strncpy(string1, buf, 4095);string1[4095] = 0;strncpy(string2, buf+strlen(string1)+1, 4095);return 0;
}/* This is set to 1 when we've been authorized */
int auth = 0;
char string1[4096];
char string2[4096];int process_response(int sock) {int ret;int id;int command;ret=recv_rcon(sock, 1, &id, &command, string1, string2);if(DEBUG) printf("Received = %d : id=%d, command=%d, s1=%s, s2=%s\n",ret, id, command, string1, string2);if(ret==-1) {return -1;}switch(command) {case SERVERDATA_AUTH_RESPONSE:switch(id) {case 20: auth = 1;break;case -1:printf("Password Refused\n");return -1;default:printf("Bad Auth Response ID = %d\n",id);exit(-1);};break;case SERVERDATA_RESPONSE_VALUE:printf("%s",string1);break;default:printf("Unexpected command: %d",command);break;};
}int main(int argc, char **argv)
{struct sockaddr_in a;int sock;int ret, i;char password[512]="YOUR_PASSWORD_HERE";short port = 27015;char address[512] = "127.0.0.1";int arg;auth = 0;if(argc<2){printf("Syntax: rcon [-P\"rcon_password\"] [-a127.0.0.1] [-p27015] command\n");return 0;}for(arg = 1;arg<argc;arg++) {if(argv[arg][0] != '-')break; /* done with args */switch(argv[arg][1]) {case 'a':strncpy(address, argv[arg]+2, 512);break;case 'p':port = atoi(argv[arg]+2);break;case 'P':strncpy(password, argv[arg]+2, 512);break;default:fprintf(stderr, "Unknown option -%c\n",argv[arg][1]);return 0;}}a.sin_family = AF_INET;a.sin_addr.s_addr = inet_addr(address);a.sin_port = htons(port);sock = socket(AF_INET, SOCK_STREAM,0); // TCP socketret = 0;ret = connect(sock,(struct sockaddr *)&a,sizeof(a));if(ret == -1) {perror("connect() failed.");return -1;} else {if(DEBUG) printf("Connected to Server\n");}if(DEBUG) printf("Sending RCON Password\n");ret=send_rcon(sock, 20, SERVERDATA_AUTH, password, "");if(ret == -1) {perror("Sending password");return -1;};while(auth==0) {if(process_response(sock)==-1) {printf("Couldn't Authenticate\n");exit(-1);}}if(DEBUG) printf("Password Accepted\n");/* Now we're authorized, send command *//* built command */ret = 0;while(arg < argc) {if(strlen(argv[arg]) + ret < 4096) {strcpy(string1+ret, argv[arg]);ret += strlen(argv[arg]);string1[ret] = ' ';ret++;arg++;} else {fprintf(stderr, "cmd too long to send\n");return -1;}}//  string1[ret] = '\n';//ret++;ret--;string1[ret]=0;if(DEBUG) printf("Sending Command: \"%s\"\n", string1);ret=send_rcon(sock, 20, SERVERDATA_EXECCOMMAND, string1, "");if(ret == -1) {perror("cmd send");return -1;}// process responses until a timeoutwhile(process_response(sock) != -1);return 0;
}

创建文件后进行编译

gcc -o rcon rcon.c

运行编译后的文件（密码、ip、端口、命令）

./rcon -PYOURPASSWORD -a127.0.0.1 -p32330 listplayers