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Fixed handshake buffer overflow

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This commit is contained in:
Erik Ekman 2006-11-08 21:02:08 +00:00
parent 47d5320a49
commit 68e2e147a9
1 changed files with 14 additions and 6 deletions
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20
iodine.c
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@ -112,8 +112,8 @@ static int
handshake(int dns_fd) handshake(int dns_fd)
{ {
struct timeval tv; struct timeval tv;
char server[128]; char server[65];
char client[128]; char client[65];
char in[4096]; char in[4096];
int timeout; int timeout;
fd_set fds; fd_set fds;
@ -144,12 +144,20 @@ handshake(int dns_fd)
} }
if (read > 0) { if (read > 0) {
if (sscanf(in, "%[^-]-%[^-]-%d", if (sscanf(in, "%64[^-]-%64[^-]-%d",
server, client, &mtu) == 3) { server, client, &mtu) == 3) {
if (tun_setip(client) == 0 && tun_setmtu(mtu) == 0)
server[64] = 0;
client[64] = 0;
if (tun_setip(client) == 0 &&
tun_setmtu(mtu) == 0) {
return 0; return 0;
else } else {
warn("Received handshake but b0rk"); warn("Received handshake with bad data");
}
} else {
printf("Received bad handshake\n");
} }
} }
} }