/*
- * Copyright (c) 2006-2007 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
+ * Copyright (c) 2006-2014 Erik Ekman <yarrick@kryo.se>,
+ * 2006-2009 Bjorn Andersson <flex@kryo.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#include <string.h>
#include <stdio.h>
+#include <stdint.h>
#include <time.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-#include <netinet/in.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#ifdef WINDOWS32
+#include <winsock2.h>
+#else
+#include <netdb.h>
+#endif
#include "common.h"
+#include "encoding.h"
#include "user.h"
-struct user users[USERS];
+struct tun_user *users;
+unsigned usercount;
-void
-init_users(in_addr_t my_ip)
+int
+init_users(in_addr_t my_ip, int netbits)
{
int i;
+ int skip = 0;
char newip[16];
-
- memset(users, 0, USERS * sizeof(struct user));
- for (i = 0; i < USERS; i++) {
+
+ int maxusers;
+
+ in_addr_t netmask = 0;
+ struct in_addr net;
+ struct in_addr ipstart;
+
+ for (i = 0; i < netbits; i++) {
+ netmask = (netmask << 1) | 1;
+ }
+ netmask <<= (32 - netbits);
+ net.s_addr = htonl(netmask);
+ ipstart.s_addr = my_ip & net.s_addr;
+
+ maxusers = (1 << (32-netbits)) - 3; /* 3: Net addr, broadcast addr, iodined addr */
+ usercount = MIN(maxusers, USERS);
+
+ users = calloc(usercount, sizeof(struct tun_user));
+ for (i = 0; i < usercount; i++) {
+ in_addr_t ip;
users[i].id = i;
- snprintf(newip, sizeof(newip), "0.0.0.%d", i + 1);
- users[i].tun_ip = my_ip + inet_addr(newip);;
- users[i].inpacket.len = 0;
- users[i].inpacket.offset = 0;
- users[i].outpacket.len = 0;
- users[i].q.id = 0;
+ snprintf(newip, sizeof(newip), "0.0.0.%d", i + skip + 1);
+ ip = ipstart.s_addr + inet_addr(newip);
+ if (ip == my_ip && skip == 0) {
+ /* This IP was taken by iodined */
+ skip++;
+ snprintf(newip, sizeof(newip), "0.0.0.%d", i + skip + 1);
+ ip = ipstart.s_addr + inet_addr(newip);
+ }
+ users[i].tun_ip = ip;
+ net.s_addr = ip;
+ users[i].disabled = 0;
+ users[i].authenticated = 0;
+ users[i].authenticated_raw = 0;
+ users[i].active = 0;
+ /* Rest is reset on login ('V' packet) */
}
+
+ return usercount;
+}
+
+const char*
+users_get_first_ip()
+{
+ struct in_addr ip;
+ ip.s_addr = users[0].tun_ip;
+ return strdup(inet_ntoa(ip));
}
int
int i;
ret = 0;
- for (i = 0; i < USERS; i++) {
- if (users[i].active && users[i].last_pkt + 60 > time(NULL) &&
- users[i].q.id != 0) {
+ for (i = 0; i < usercount; i++) {
+ if (users[i].active && !users[i].disabled &&
+ users[i].last_pkt + 60 > time(NULL) &&
+ users[i].q.id != 0 && users[i].conn == CONN_DNS_NULL) {
ret++;
}
}
-
+
return ret;
}
int i;
ret = -1;
- for (i = 0; i < USERS; i++) {
- if (users[i].active && users[i].last_pkt + 60 > time(NULL) &&
+ for (i = 0; i < usercount; i++) {
+ if (users[i].active &&
+ users[i].authenticated &&
+ !users[i].disabled &&
+ users[i].last_pkt + 60 > time(NULL) &&
ip == users[i].tun_ip) {
ret = i;
break;
int
all_users_waiting_to_send()
+/* If this returns true, then reading from tun device is blocked.
+ So only return true when all clients have at least one packet in
+ the outpacket-queue, so that sending back-to-back is possible
+ without going through another select loop.
+*/
{
time_t now;
int ret;
ret = 1;
now = time(NULL);
- for (i = 0; i < USERS; i++) {
- if (users[i].active && users[i].last_pkt + 60 > now &&
- users[i].outpacket.len == 0) {
+ for (i = 0; i < usercount; i++) {
+ if (users[i].active && !users[i].disabled &&
+ users[i].last_pkt + 60 > now &&
+ ((users[i].conn == CONN_RAW_UDP) ||
+ ((users[i].conn == CONN_DNS_NULL)
+#ifdef OUTPACKETQ_LEN
+ && users[i].outpacketq_filled < 1
+#else
+ && users[i].outpacket.len == 0
+#endif
+ ))) {
+
ret = 0;
break;
}
{
int ret = -1;
int i;
- for (i = 0; i < USERS; i++) {
+ for (i = 0; i < usercount; i++) {
/* Not used at all or not used in one minute */
- if (!users[i].active || users[i].last_pkt + 60 < time(NULL)) {
+ if ((!users[i].active || users[i].last_pkt + 60 < time(NULL)) && !users[i].disabled) {
users[i].active = 1;
+ users[i].authenticated = 0;
+ users[i].authenticated_raw = 0;
users[i].last_pkt = time(NULL);
+ users[i].fragsize = 4096;
+ users[i].conn = CONN_DNS_NULL;
ret = i;
break;
}
return ret;
}
+void
+user_switch_codec(int userid, struct encoder *enc)
+{
+ if (userid < 0 || userid >= usercount)
+ return;
+
+ users[userid].encoder = enc;
+}
+
+void
+user_set_conn_type(int userid, enum connection c)
+{
+ if (userid < 0 || userid >= usercount)
+ return;
+
+ if (c < 0 || c >= CONN_MAX)
+ return;
+
+ users[userid].conn = c;
+}
+
ToastFreeware / debian / iodine.git / blobdiff