mirror of
https://github.com/yarrick/iodine.git
synced 2024-12-22 13:23:32 +02:00
Assign client IPs within the network (fixes #28), also limit number of users depending on netmask (for #27)
This commit is contained in:
Erik Ekman
Erik Ekman
parent
67252cda16
commit
c7fa4ddde2
4 changed files with 94 additions and 15 deletions
|
|
@ -791,6 +791,8 @@ main(int argc, char **argv)
|
|||
int port;
|
||||
int mtu;
|
||||
int skipipconfig;
|
||||
int netmask;
|
||||
int created_users;
|
||||
|
||||
username = NULL;
|
||||
newroot = NULL;
|
||||
|
|
@ -805,6 +807,7 @@ main(int argc, char **argv)
|
|||
check_ip = 1;
|
||||
skipipconfig = 0;
|
||||
debug = 0;
|
||||
netmask = 27;
|
||||
|
||||
b32 = get_base32_encoder();
|
||||
|
||||
|
|
@ -954,6 +957,10 @@ main(int argc, char **argv)
|
|||
warnx("Bad IP address to return as nameserver.\n");
|
||||
usage();
|
||||
}
|
||||
if (netmask > 30 || netmask < 8) {
|
||||
warnx("Bad netmask (%d bits). Use 8-30 bits.\n", netmask);
|
||||
usage();
|
||||
}
|
||||
|
||||
if (strlen(password) == 0)
|
||||
read_password(password, sizeof(password));
|
||||
|
|
@ -970,8 +977,13 @@ main(int argc, char **argv)
|
|||
goto cleanup3;
|
||||
|
||||
my_mtu = mtu;
|
||||
init_users(my_ip);
|
||||
|
||||
created_users = init_users(my_ip, netmask);
|
||||
|
||||
if (created_users < USERS) {
|
||||
printf("Limiting to %d simultaneous users because of netmask /%d\n",
|
||||
created_users, netmask);
|
||||
}
|
||||
printf("Listening to dns for domain %s\n", topdomain);
|
||||
|
||||
if (foreground == 0)
|
||||
|
|
|
|||
53
src/user.c
53
src/user.c
|
|
@ -35,17 +35,49 @@
|
|||
|
||||
struct user users[USERS];
|
||||
|
||||
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];
|
||||
int created_users = 0;
|
||||
|
||||
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 */
|
||||
|
||||
memset(users, 0, USERS * sizeof(struct user));
|
||||
for (i = 0; i < USERS; 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);;
|
||||
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;
|
||||
if (maxusers-- < 1) {
|
||||
users[i].disabled = 1;
|
||||
} else {
|
||||
users[i].disabled = 0;
|
||||
created_users++;
|
||||
}
|
||||
users[i].inpacket.len = 0;
|
||||
users[i].inpacket.offset = 0;
|
||||
users[i].outpacket.len = 0;
|
||||
|
|
@ -53,6 +85,8 @@ init_users(in_addr_t my_ip)
|
|||
users[i].out_acked_seqno = 0;
|
||||
users[i].out_acked_fragment = 0;
|
||||
}
|
||||
|
||||
return created_users;
|
||||
}
|
||||
|
||||
int
|
||||
|
|
@ -63,7 +97,8 @@ users_waiting_on_reply()
|
|||
|
||||
ret = 0;
|
||||
for (i = 0; i < USERS; i++) {
|
||||
if (users[i].active && users[i].last_pkt + 60 > time(NULL) &&
|
||||
if (users[i].active && !users[i].disabled &&
|
||||
users[i].last_pkt + 60 > time(NULL) &&
|
||||
users[i].q.id != 0) {
|
||||
ret++;
|
||||
}
|
||||
|
|
@ -80,7 +115,8 @@ find_user_by_ip(uint32_t ip)
|
|||
|
||||
ret = -1;
|
||||
for (i = 0; i < USERS; i++) {
|
||||
if (users[i].active && users[i].last_pkt + 60 > time(NULL) &&
|
||||
if (users[i].active && !users[i].disabled &&
|
||||
users[i].last_pkt + 60 > time(NULL) &&
|
||||
ip == users[i].tun_ip) {
|
||||
ret = i;
|
||||
break;
|
||||
|
|
@ -99,7 +135,8 @@ all_users_waiting_to_send()
|
|||
ret = 1;
|
||||
now = time(NULL);
|
||||
for (i = 0; i < USERS; i++) {
|
||||
if (users[i].active && users[i].last_pkt + 60 > now &&
|
||||
if (users[i].active && !users[i].disabled &&
|
||||
users[i].last_pkt + 60 > now &&
|
||||
users[i].outpacket.len == 0) {
|
||||
ret = 0;
|
||||
break;
|
||||
|
|
@ -115,7 +152,7 @@ find_available_user()
|
|||
int i;
|
||||
for (i = 0; i < USERS; 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].last_pkt = time(NULL);
|
||||
ret = i;
|
||||
|
|
|
|||
|
|
@ -22,6 +22,7 @@
|
|||
struct user {
|
||||
char id;
|
||||
int active;
|
||||
int disabled;
|
||||
time_t last_pkt;
|
||||
int seed;
|
||||
in_addr_t tun_ip;
|
||||
|
|
@ -36,7 +37,7 @@ struct user {
|
|||
|
||||
extern struct user users[USERS];
|
||||
|
||||
void init_users(in_addr_t);
|
||||
int init_users(in_addr_t, int);
|
||||
int users_waiting_on_reply();
|
||||
int find_user_by_ip(uint32_t);
|
||||
int all_users_waiting_to_send();
|
||||
|
|
|
|||
39
tests/user.c
39
tests/user.c
|
|
@ -34,7 +34,7 @@ START_TEST(test_init_users)
|
|||
int i;
|
||||
|
||||
ip = inet_addr("127.0.0.1");
|
||||
init_users(ip);
|
||||
init_users(ip, 27);
|
||||
for (i = 0; i < USERS; i++) {
|
||||
fail_unless(users[i].id == i);
|
||||
fail_unless(users[i].q.id == 0);
|
||||
|
|
@ -51,7 +51,7 @@ START_TEST(test_users_waiting)
|
|||
in_addr_t ip;
|
||||
|
||||
ip = inet_addr("127.0.0.1");
|
||||
init_users(ip);
|
||||
init_users(ip, 27);
|
||||
|
||||
fail_unless(users_waiting_on_reply() == 0);
|
||||
|
||||
|
|
@ -75,7 +75,7 @@ START_TEST(test_find_user_by_ip)
|
|||
unsigned int testip;
|
||||
|
||||
ip = inet_addr("127.0.0.1");
|
||||
init_users(ip);
|
||||
init_users(ip, 27);
|
||||
|
||||
testip = (unsigned int) inet_addr("10.0.0.1");
|
||||
fail_unless(find_user_by_ip(testip) == -1);
|
||||
|
|
@ -100,7 +100,7 @@ START_TEST(test_all_users_waiting_to_send)
|
|||
in_addr_t ip;
|
||||
|
||||
ip = inet_addr("127.0.0.1");
|
||||
init_users(ip);
|
||||
init_users(ip, 27);
|
||||
|
||||
fail_unless(all_users_waiting_to_send() == 1);
|
||||
|
||||
|
|
@ -124,7 +124,7 @@ START_TEST(test_find_available_user)
|
|||
int i;
|
||||
|
||||
ip = inet_addr("127.0.0.1");
|
||||
init_users(ip);
|
||||
init_users(ip, 27);
|
||||
|
||||
for (i = 0; i < USERS; i++) {
|
||||
fail_unless(find_available_user() == i);
|
||||
|
|
@ -146,6 +146,34 @@ START_TEST(test_find_available_user)
|
|||
}
|
||||
END_TEST
|
||||
|
||||
START_TEST(test_find_available_user_small_net)
|
||||
{
|
||||
in_addr_t ip;
|
||||
int i;
|
||||
|
||||
ip = inet_addr("127.0.0.1");
|
||||
init_users(ip, 29); /* this should result in 5 enabled users */
|
||||
|
||||
for (i = 0; i < 5; i++) {
|
||||
fail_unless(find_available_user() == i);
|
||||
}
|
||||
|
||||
for (i = 0; i < USERS; i++) {
|
||||
fail_unless(find_available_user() == -1);
|
||||
}
|
||||
|
||||
users[3].active = 0;
|
||||
|
||||
fail_unless(find_available_user() == 3);
|
||||
fail_unless(find_available_user() == -1);
|
||||
|
||||
users[3].last_pkt = 55;
|
||||
|
||||
fail_unless(find_available_user() == 3);
|
||||
fail_unless(find_available_user() == -1);
|
||||
}
|
||||
END_TEST
|
||||
|
||||
TCase *
|
||||
test_user_create_tests()
|
||||
{
|
||||
|
|
@ -157,6 +185,7 @@ test_user_create_tests()
|
|||
tcase_add_test(tc, test_find_user_by_ip);
|
||||
tcase_add_test(tc, test_all_users_waiting_to_send);
|
||||
tcase_add_test(tc, test_find_available_user);
|
||||
tcase_add_test(tc, test_find_available_user_small_net);
|
||||
|
||||
return tc;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue