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(svn r15094) -Feature: Add support for IP range bans using CIDR notation.

This commit is contained in:
peter1138 2009-01-15 18:11:26 +00:00
parent 3e7c2bbacc
commit a039ec0d21
1 changed files with 22 additions and 3 deletions
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25
src/network/network.cpp
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@ -511,7 +511,28 @@ static void NetworkAcceptClients()
for (i = 0; i < lengthof(_network_ban_list); i++) {
if (_network_ban_list[i] == NULL) continue;
if (sin.sin_addr.s_addr == inet_addr(_network_ban_list[i])) {
/* Check for CIDR separator */
char *chr_cidr = strchr(_network_ban_list[i], '/');
if (chr_cidr != NULL) {
int cidr = atoi(chr_cidr + 1);
/* Invalid CIDR, treat as single host */
if (cidr <= 0 || cidr > 32) cidr = 32;
/* Remove and then replace the / so that inet_addr() works on the IP portion */
*chr_cidr = '\0';
uint32 ban_ip = inet_addr(_network_ban_list[i]);
*chr_cidr = '/';
/* Convert CIDR to mask in network format */
uint32 mask = htonl(-(1 << (32 - cidr)));
if ((sin.sin_addr.s_addr & mask) == (ban_ip & mask)) banned = true;
} else {
/* No CIDR used, so just perform a simple IP test */
if (sin.sin_addr.s_addr == inet_addr(_network_ban_list[i])) banned = true;
}
if (banned) {
Packet p(PACKET_SERVER_BANNED);
p.PrepareToSend();
@ -519,8 +540,6 @@ static void NetworkAcceptClients()
send(s, (const char*)p.buffer, p.size, 0);
closesocket(s);
banned = true;
break;
}
}