Hello.

I have two machines I'm testing my code on, one works fine, the other I'm having some problems and I don't know why it is.

I'm using an object (C++) for the networking part of my project. On the server side, I do this: (error checking removed for clarity)

     res = getaddrinfo(NULL, port, &hints, &server)) < 0

     for(p=server; p!=NULL; p=p->ai_next){
             fd = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
             if(fd<0){
                     continue;
                     }

             if(bind(fd, p->ai_addr, p->ai_addrlen)<0){
                     close(fd);
                     continue;
                     }
             break;
             }

This all works. I then make an object with this constructor

net::net(int fd, struct sockaddr *other, socklen_t *other_len){
        int counter;
         this->fd = fd;
         if(other != NULL){
                 this->other.sa_family = other->sa_family;
                 for(counter=0;counter<13;counter++)
                         this->other.sa_data[counter]=other->sa_data[counter];
                 }
         else
                 cerr << "Networking error" << endl;
         this->other_len = *other_len;
         }

 void net::gsend(string s){   
         if(sendto(this->fd, s.c_str(), s.size()+1, 0, &(this->other), this->other_len)<0){
                 cerr << "Error Sending, " << s << endl;
                 cerr << strerror(errno) << endl;
                 }
         return;
         }

  string net::grecv(){
         stringstream ss;
         string s;
         char buf[BUFSIZE];
         buf[BUFSIZE-1] = '\0';

         if(recvfrom(this->fd, buf, BUFSIZE-1, 0, &(this->other), &(this->other_len))<0){
                 cerr << "Error Recieving\n";
                 cerr << strerror(errno) << endl;
                 }

         // convert to c++ string and if there are multiple trailing ';' remove them
         ss << buf;
         s=ss.str();
         while(s.find(";;", s.size()-2) != string::npos)
                 s.erase(s.size()-1,1);
         return s;
         }    

So my problem is, is that on one machine, everything works fine. On another, everything works fine until I call my server's gsend() function. In which I get a "Error: Network Unreachable." I call gercv() first before calling gsend() too. Can anyone help me? I would really appreciate it.