generating numbers faster

hhhi  all there.

this is code that generate numbers. suppose i need to generate 100 numbers from 1 to 100 but no
repeation. the programe is working fine but as it goes on generating it goes slow to generate as it has to
check whether the no is generated before or not. IF not generated store it in a link list. and i need the printing of the numbers as the same sequence as it is generated, NOT IN A ORDER (i.e asscending or desending)

so can any one can give me alternative method to make
the same objective faster. plez help. i'll be very thankful to the one who can solve my tension.


int generate_array_of_numbers(int total_no)
{      int no,i;

      for(int times=0;times!=total_no;times++)
      {
            again:
            i=0;
            time_t t;
            srand((unsigned) time(&t));
            no=rand() % (total_no+1);

            if(no==0)
                  goto again;

// CHECKING PREVIOUSLY GENERATED OR NOT IF GENERATED, GENERATE  ANOTHER AGAIN
            for(node=&start;node->next!=NULL && i<=total_no;node=node->next,i++)
            {      if(node->n==no)
                  {      goto again;
                  }
            }
//IF NOT GENERATED BEFORE ALLOCATING MEMORY FOR THE SAME NO AND SAVING IN A LINK LIST
            node->next=(struct link*)malloc(sizeof(struct link));
            node=node->next;
            node->n=no;
            start.n=no;
            node->next=NULL;
      }
      return 0;
}