+#include "common.h"
+
+#include <unistd.h>
+#include <strings.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+extern char *rcon_host, *rcon_port, *rcon_pass, *map;
+
+void senderr(char *errmsg, bool myfault) {
+ if (myfault) {
+ puts("Status: 500 CGI error");
+ } else {
+ puts("Status: 400 CGI error");
+ }
+ puts("Content-Type: text/plain;charset=utf8");
+ puts("X-Frame-Options: DENY");
+ puts("");
+ puts("An error occured while processing your request:");
+ puts(errmsg);
+ exit(0);
+}
+
+struct inifile *get_config(void) {
+ static struct inifile *res = NULL;
+ if (!res) res = slurp_inifile(CONFIG_PATH);
+ if (!res) {
+ // error!
+ senderr("can't fetch config", true);
+ }
+ return res;
+}
+
+char *getcval(char *key) {
+ char *r = inifile_lookup(get_config(), key);
+ if (!r) {
+ // error!
+ senderr("config value missing", true);
+ }
+ return r;
+}
+
+void rcon_send(char *data) {
+ // get config
+ char *host = getcval("rcon_host");
+ char *port = getcval("rcon_port");
+ char *pass = getcval("rcon_pass");
+
+ // construct packet
+ size_t pass_len = strlen(pass);
+ size_t data_len = strlen(data);
+ size_t packet_len = 4+4+1+pass_len+1+data_len +1;
+ char buf[packet_len];
+ char *p = buf;
+ memcpy(p, "\xff\xff\xff\xffrcon ", 9); p += 9;
+ memcpy(p, pass, pass_len); p += pass_len;
+ *(p++) = ' ';
+ memcpy(p, data, data_len); p += data_len;
+ *(p++) = '\0';
+
+ // connect
+ int fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd == -1) senderr("can't create UDP socket", true);
+ struct sockaddr_in addr;
+ bzero(&addr, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(atoi(port));
+ if (!inet_aton(host, &addr.sin_addr)) senderr("bad ipv4 addr in config", true);
+ if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)))
+ senderr("can't connect UDP socket", true);
+
+ // send
+ if (write(fd, buf, packet_len) != packet_len)
+ senderr("incomplete packet sent or write error", true);
+
+ close(fd);
+}