release/src/router/busybox/networking/tcpudp_perhost.c

   1 /* Based on ipsvd utilities written by Gerrit Pape <pape@smarden.org>
   2  * which are released into public domain by the author.
   3  * Homepage: http://smarden.sunsite.dk/ipsvd/
   4  *
   5  * Copyright (C) 2007 Denys Vlasenko.
   6  *
   7  * Licensed under GPLv2, see file LICENSE in this source tree.
   8  */
   9
  10 #include "libbb.h"
  11 #include "tcpudp_perhost.h"
  12
  13 static struct hcc *cc;
  14 static unsigned cclen;
  15
  16 /* to be optimized */
  17
  18 void ipsvd_perhost_init(unsigned c)
  19 {
  20 //      free(cc);
  21         cc = xzalloc(c * sizeof(*cc));
  22         cclen = c;
  23 }
  24
  25 unsigned ipsvd_perhost_add(char *ip, unsigned maxconn, struct hcc **hccpp)
  26 {
  27         unsigned i;
  28         unsigned conn = 1;
  29         int freepos = -1;
  30
  31         for (i = 0; i < cclen; ++i) {
  32                 if (!cc[i].ip) {
  33                         freepos = i;
  34                         continue;
  35                 }
  36                 if (strcmp(cc[i].ip, ip) == 0) {
  37                         conn++;
  38                         continue;
  39                 }
  40         }
  41         if (freepos == -1) return 0;
  42         if (conn <= maxconn) {
  43                 cc[freepos].ip = ip;
  44                 *hccpp = &cc[freepos];
  45         }
  46         return conn;
  47 }
  48
  49 void ipsvd_perhost_remove(int pid)
  50 {
  51         unsigned i;
  52         for (i = 0; i < cclen; ++i) {
  53                 if (cc[i].pid == pid) {
  54                         free(cc[i].ip);
  55                         cc[i].ip = NULL;
  56                         cc[i].pid = 0;
  57                         return;
  58                 }
  59         }
  60 }
  61
  62 //void ipsvd_perhost_free(void)
  63 //{
  64 //      free(cc);
  65 //}