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/* SSHARP SSH 1&2 MiM implemenation (C) 2001 Stealth <stealth@segfault.net>
*
* TESO confidential.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <netinet/in.h>
#include <errno.h>
#include <assert.h>
#include "ssharp.h"
#include "auth.h"
int socket_connect_b(struct sockaddr *s, socklen_t len, u_short minport)
{
int one = 1, i = 0, fd, fa;
struct sockaddr_in local4;
struct sockaddr_in6 local6;
struct sockaddr *sa;
memset(&local4, 0, sizeof(local4));
local4.sin_family = AF_INET;
memset(&local6, 0, sizeof(local6));
local6.sin6_family = AF_INET6;
if (len == sizeof(struct sockaddr_in6)) {
sa = (struct sockaddr*)&local6;
fa = PF_INET6;
} else {
sa = (struct sockaddr*)&local4;
fa = PF_INET;
}
for (i = minport; i < 65500; ++i) {
local4.sin_port = htons(i);
local6.sin6_port = htons(i);
fd = socket(fa, SOCK_STREAM, 0);
if (fd < 0)
return -1;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
if (bind(fd, sa, len) < 0) {
if (errno == EADDRINUSE) {
close(fd);
continue;
} else
return -1;
}
if (connect(fd, s, len) < 0) {
if (errno == EADDRNOTAVAIL) {
close(fd);
continue;
} else
return -1;
}
break;
}
return fd;
}
int writen(int fd, const void *buf, size_t len)
{
int o = 0, n;
while (len > 0) {
if ((n = write(fd, buf+o, len)) < 0)
return n;
len -= n;
o += n;
}
return o;
}
int readn(int fd, char *buf, size_t len)
{
int i = 0;
while (len > 0) {
if (read(fd, &buf[i], 1) < 0) {
return -1;
}
++i;
--len;
}
return i;
}
sharp_t sharp_dup(sharp_t *s)
{
sharp_t ret;
memset(&ret, 0, sizeof(ret));
if (s->login)
ret.login = strdup(s->login);
if (s->pass)
ret.pass = strdup(s->pass);
if (s->remote)
ret.remote = strdup(s->remote);
ret.remote_port = s->remote_port;
return ret;
}
#ifdef FREEBSD
#define LINUX22
#endif
// obtain real destination of connection
int dstaddr(int sock, struct sockaddr_in *dst)
{
socklen_t size;
assert(dst);
#ifdef LINUX22
size = sizeof(struct sockaddr_in);
if (getsockname(sock, (struct sockaddr*)dst, &size) < 0) {
perror("getsockname");
exit(errno);
}
#elif defined(LINUX24)
#include "netfilter.h"
size = sizeof(struct sockaddr_in);
if (getsockopt(sock, SOL_IP, SO_ORIGINAL_DST, dst, &size) < 0) {
perror("getsockopt");
exit(errno);
}
#else
#error "Not supported on this OS yet."
#endif
return 0;
}
Authctxt *auth_dup(Authctxt *a)
{
Authctxt *ret = (Authctxt*)malloc(sizeof(*a));
if (!a || !ret) {
free(ret);
return NULL;
}
*ret = *a;
if (a->user)
ret->user = strdup(a->user);
if (a->service)
ret->service = strdup(a->service);
if (a->style)
ret->style = strdup(a->style);
ret->sharp = sharp_dup(&a->sharp);
return ret;
}
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