release/src/router/dropbear/netio.h

   1 #ifndef DROPBEAR_NETIO_H
   2 #define DROPBEAR_NETIO_H
   3
   4 #include "includes.h"
   5 #include "buffer.h"
   6 #include "queue.h"
   7
   8 enum dropbear_prio {
   9         DROPBEAR_PRIO_DEFAULT = 10,
  10         DROPBEAR_PRIO_LOWDELAY = 11,
  11         DROPBEAR_PRIO_BULK = 12,
  12 };
  13
  14 void set_sock_nodelay(int sock);
  15 void set_sock_priority(int sock, enum dropbear_prio prio);
  16
  17 void get_socket_address(int fd, char **local_host, char **local_port,
  18                 char **remote_host, char **remote_port, int host_lookup);
  19 void getaddrstring(struct sockaddr_storage* addr,
  20                 char **ret_host, char **ret_port, int host_lookup);
  21 int dropbear_listen(const char* address, const char* port,
  22                 int *socks, unsigned int sockcount, char **errstring, int *maxfd);
  23
  24 struct dropbear_progress_connection;
  25
  26 /* result is DROPBEAR_SUCCESS or DROPBEAR_FAILURE.
  27 errstring is only set on DROPBEAR_FAILURE, returns failure message for the last attempted socket */
  28 typedef void(*connect_callback)(int result, int sock, void* data, const char* errstring);
  29
  30 /* Always returns a progress connection, if it fails it will call the callback at a later point */
  31 struct dropbear_progress_connection * connect_remote (const char* remotehost, const char* remoteport,
  32         connect_callback cb, void *cb_data);
  33
  34 /* Sets up for select() */
  35 void set_connect_fds(fd_set *writefd);
  36 /* Handles ready sockets after select() */
  37 void handle_connect_fds(fd_set *writefd);
  38 /* Cleanup */
  39 void remove_connect_pending(void);
  40
  41 /* Doesn't actually stop the connect, but adds a dummy callback instead */
  42 void cancel_connect(struct dropbear_progress_connection *c);
  43
  44 void connect_set_writequeue(struct dropbear_progress_connection *c, struct Queue *writequeue);
  45
  46 /* TODO: writev #ifdef guard */
  47 /* Fills out iov which contains iov_count slots, returning the number filled in iov_count */
  48 void packet_queue_to_iovec(struct Queue *queue, struct iovec *iov, unsigned int *iov_count);
  49 void packet_queue_consume(struct Queue *queue, ssize_t written);
  50
  51 #ifdef DROPBEAR_SERVER_TCP_FAST_OPEN
  52 /* Try for any Linux builds, will fall back if the kernel doesn't support it */
  53 void set_listen_fast_open(int sock);
  54 /* Define values which may be supported by the kernel even if the libc is too old */
  55 #ifndef TCP_FASTOPEN
  56 #define TCP_FASTOPEN 23
  57 #endif
  58 #ifndef MSG_FASTOPEN
  59 #define MSG_FASTOPEN 0x20000000
  60 #endif
  61 #endif
  62
  63 #endif
  64