udhcpc6: add DHCPv6 env helper
[oweals/busybox.git] / 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 struct hcc* FAST_FUNC ipsvd_perhost_init(unsigned c)
14 {
15 //      free(cc);
16         struct hcc *cc = xzalloc((c + 1) * sizeof(*cc));
17         cc[c].pid = -1; /* "end" marker */
18         return cc;
19 }
20
21 unsigned FAST_FUNC ipsvd_perhost_add(struct hcc *cc, char *ip, unsigned maxconn, struct hcc **hccpp)
22 {
23         unsigned i;
24         unsigned conn = 1;
25         int freepos = -1;
26
27         for (i = 0; cc[i].pid >= 0; ++i) {
28                 if (!cc[i].ip) {
29                         freepos = i;
30                         continue;
31                 }
32                 if (strcmp(cc[i].ip, ip) == 0) {
33                         conn++;
34                         continue;
35                 }
36         }
37         if (freepos == -1) return 0;
38         if (conn <= maxconn) {
39                 cc[freepos].ip = ip;
40                 *hccpp = &cc[freepos];
41         }
42         return conn;
43 }
44
45 void FAST_FUNC ipsvd_perhost_remove(struct hcc *cc, int pid)
46 {
47         unsigned i;
48         for (i = 0; cc[i].pid >= 0; ++i) {
49                 if (cc[i].pid == pid) {
50                         free(cc[i].ip);
51                         cc[i].ip = NULL;
52                         cc[i].pid = 0;
53                         return;
54                 }
55         }
56 }
57
58 //void ipsvd_perhost_free(struct hcc *cc)
59 //{
60 //      free(cc);
61 //}