#include "para.h"
#include "net.h"
#include "string.h"
-#include <netdb.h>
#include "error.h"
-extern void (*crypt_function_recv)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
-extern void (*crypt_function_send)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
+static crypt_function **crypt_functions;
+static unsigned max_crypt_fd;
+
+void enable_crypt(int fd, crypt_function *recv, crypt_function *send)
+{
+ if (max_crypt_fd < fd) {
+ crypt_functions = para_realloc(crypt_functions,
+ 2 * (fd + 1) * sizeof(crypt_function*));
+ max_crypt_fd = fd;
+ }
+ crypt_functions[2 * fd] = recv;
+ crypt_functions[2 * fd + 1] = send;
+ PARA_INFO_LOG("rc4 encryption activated for fd %d\n", fd);
+}
+
+void disable_crypt(int fd)
+{
+ crypt_functions[2 * fd] = NULL;
+ crypt_functions[2 * fd + 1] = NULL;
+}
/**
int send_bin_buffer(int fd, const char *buf, size_t len)
{
int ret;
+ crypt_function *cf = NULL;
+
+ if (fd <= max_crypt_fd)
+ cf = crypt_functions[2 * fd + 1];
if (!len)
PARA_CRIT_LOG("%s", "len == 0\n");
- if (crypt_function_send) {
+ if (cf) {
unsigned char *outbuf = para_malloc(len);
- crypt_function_send(len, (unsigned char *)buf, outbuf);
+ (*cf)(len, (unsigned char *)buf, outbuf);
ret = sendall(fd, (char *)outbuf, &len);
free(outbuf);
} else
__must_check int recv_bin_buffer(int fd, char *buf, ssize_t size)
{
int n;
+ crypt_function *cf = NULL;
- if (crypt_function_recv) {
+ if (fd <= max_crypt_fd)
+ cf = crypt_functions[2 * fd];
+ if (cf) {
unsigned char *tmp = para_malloc(size);
n = recv(fd, tmp, size, 0);
if (n > 0)
- crypt_function_recv(n, tmp, (unsigned char *)buf);
+ (*cf)(n, tmp, (unsigned char *)buf);
free(tmp);
} else
n = recv(fd, buf, size, 0);
/**
* wrapper around gethostbyname
*
- * @param host hostname or IPv4 address
- * \return The hostent structure or a NULL pointer if an error occurs
+ * \param host hostname or IPv4 address
+ * \param ret the hostent structure is returned here
+ *
+ * \return positive on success, negative on errors. On success, \a ret
+ * contains the return value of the underlying gethostbyname() call.
+ *
* \sa gethostbyname(2)
*/
-struct hostent *get_host_info(char *host)
+int get_host_info(char *host, struct hostent **ret)
{
PARA_INFO_LOG("getting host info of %s\n", host);
/* FIXME: gethostbyname() is obsolete */
- return gethostbyname(host);
+ *ret = gethostbyname(host);
+ return *ret? 1 : -E_HOST_INFO;
}
/**