Get the interface's external IP when using Rancidmeat configuration files if none of the peers have a LAN IP

git-svn-id: https://svn.eduke32.com/eduke32@136 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/build/src/mmulti.c

@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
@@ -648,3 +649,73 @@ long getpacket (long *retother, char *bufptr)
 
     return(0);
 }
+
+char tempbuf[512],ipaddr[32];
+
+const char *getexternaladdress(void)
+{
+    int sockfd, bytes_sent, i=0, j=0;
+    struct sockaddr_in dest_addr;
+    struct hostent *h;
+    char *host = "checkip.dyndns.org";
+    char *req = "GET / HTTP/1.0\r\n\r\n";
+
+#ifdef _WIN32
+    WSADATA ws;
+
+    if (WSAStartup(0x101,&ws) == SOCKET_ERROR)  {
+        initprintf("winsock error %d\n",errno);
+        return(0);
+    }
+#endif
+    if ((h=gethostbyname(host)) == NULL) {
+        initprintf("gethostbyname error %d\n",h_errno);
+        return(0);
+    }
+
+    dest_addr.sin_addr.s_addr = ((struct in_addr *)(h->h_addr))->s_addr;
+    dest_addr.sin_family = AF_INET;
+    dest_addr.sin_port = htons(8245);
+
+    memset(&(dest_addr.sin_zero), '\0', 8);
+
+    sockfd = socket(PF_INET, SOCK_STREAM, 0);
+    if(sockfd == SOCKET_ERROR) {
+        initprintf("socket error %d\n",errno);
+        return(0);
+    }
+
+    if(connect(sockfd, (struct sockaddr *)&dest_addr, sizeof(struct sockaddr)) == SOCKET_ERROR) {
+        initprintf("connect error %d\n",errno);
+        return(0);
+    }
+
+    bytes_sent = send(sockfd, req, strlen(req), 0);
+    if(bytes_sent == SOCKET_ERROR) {
+        initprintf("bytes_sent error %d\n",errno);
+        return(0);
+    }
+
+//    initprintf("sent %d bytes\n",bytes_sent);
+    recv(sockfd, (char *)&tempbuf, sizeof(tempbuf), 0);
+    closesocket(sockfd);
+
+#ifdef _WIN32
+    WSACleanup();
+#endif
+
+    for(i=0;(unsigned)i<strlen(tempbuf);i++)
+    {
+        if(isdigit(tempbuf[i]) && (isdigit(tempbuf[i+1]) || (tempbuf[i+1] == '.')) && (isdigit(tempbuf[i+2]) || (tempbuf[i+2] == '.')) && (isdigit(tempbuf[i+3]) || (tempbuf[i+3] == '.')))
+        {
+            while(isdigit(tempbuf[i]) || (tempbuf[i] == '.'))
+            {
+                ipaddr[j] = tempbuf[i];
+                i++, j++;
+            }
+            ipaddr[j] = '\0';
+            break;
+        }
+    }
+    return(ipaddr);
+}

polymer/eduke32/source/game.c

@@ -7494,10 +7494,11 @@ static int getatoken(scriptfile *sf, tokenlist *tl, int ntokens)
         if (!Bstrcasecmp(tok, tl[i].text))
             return tl[i].tokenid;
     }
-
     return T_ERROR;
 }
 
+extern const char *getexternaladdress(void);
+
 static int parse_rancid_net(scriptfile *script)
 {
     int tokn;
@@ -7509,6 +7510,7 @@ static int parse_rancid_net(scriptfile *script)
         case T_INTERFACE:
             {
                 char *ip;
+
                 if (scriptfile_getstring(script,&ip)) break;
                 Bstrcpy(rancid_ip_strings[MAXPLAYERS],ip);
                 Bstrcpy(rancid_ip_strings[rancid_players++],ip);
@@ -7521,12 +7523,14 @@ static int parse_rancid_net(scriptfile *script)
         case T_MODE:
             {
                 char *mode;
+
                 if (scriptfile_getstring(script,&mode)) break;
             }
             break;
         case T_ALLOW:
             {
                 char *ip;
+
                 if (scriptfile_getstring(script,&ip)) break;
                 Bstrcpy(rancid_ip_strings[rancid_players++],ip);
             }
@@ -7594,12 +7598,15 @@ void checkcommandline(int argc,char **argv)
             c = argv[i];
             if (((*c == '/') || (*c == '-')) && (!firstnet))
             {
-                if (!Bstrcasecmp(c+1,"rmnet")) {
+                if (!Bstrcasecmp(c+1,"rmnet"))
-                    if (argc > i+1) {
+                {
+                    if (argc > i+1)
+                    {
                         CommandNet = argv[i+1];
                         i++;
                     }
-                    if(CommandNet) {
+                    if(CommandNet)
+                    {
                         load_rancid_net(CommandNet);
                         qsort((char *)rancid_ip_strings, rancid_players, sizeof(rancid_ip_strings[0]), (int(*)(const void*,const void*))stringsort);
                         CommandNet = 0;
@@ -7608,6 +7615,44 @@ void checkcommandline(int argc,char **argv)
                             netparamcount++;
                         netparam = (char **)calloc(netparamcount, sizeof(char **));
                         for(j=0;j<rancid_players;j++)
+                        {
+                            if(Bstrcmp(rancid_ip_strings[j],rancid_ip_strings[MAXPLAYERS]) != 0)
+                            {
+                                char tmp[16];
+                                Bstrncpy(tempbuf,rancid_ip_strings[j], 8);
+                                Bstrcpy(tmp,strtok(tempbuf,"."));
+                                if(Bstrcmp(tmp,"10") == 0)
+                                {
+                                    j = 0;
+                                    break;
+                                }
+                                if((Bstrcmp(tmp,"192") == 0) || (Bstrcmp(tmp,"172") == 0))
+                                {
+                                    Bstrcpy(tmp,strtok(NULL,"."));
+                                    if((Bstrcmp(tmp,"168") == 0) || (Bstrcmp(tmp,"16") == 0))
+                                    {
+                                        j = 0;
+                                        break;
+                                    }
+                                }
+                            }
+                        }
+                        if(j == rancid_players)
+                        {
+                            Bsprintf(tempbuf, getexternaladdress());
+                            if(tempbuf[0])
+                            {
+                                for(j=0;j<rancid_players;j++)
+                                {
+                                    if(Bstrcmp(rancid_ip_strings[j],rancid_ip_strings[MAXPLAYERS]) == 0)
+                                    {
+                                        Bstrcpy(rancid_ip_strings[MAXPLAYERS],tempbuf);
+                                        Bstrcpy(rancid_ip_strings[j],tempbuf);
+                                    }
+                                }
+                            }
+                        }
+                        for(j=0;j<rancid_players;j++)
                         {
                             if(Bstrcmp(rancid_ip_strings[j],rancid_ip_strings[MAXPLAYERS]) == 0)
                                 Bsprintf(rancid_ip_strings[j],"/n1");
@@ -7615,6 +7660,7 @@ void checkcommandline(int argc,char **argv)
                         }
                         if(j != netparamcount)
                             netparam[j] = rancid_local_port_string;
+                        initprintf("ip: %s\n",rancid_ip_strings[MAXPLAYERS]);
                     }
                     i++;
                     continue;