Mercurial > dropbear

annotate netio.h @ 1422:4cebe907dfd0

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limit input size
author Matt Johnston <matt@ucc.asn.au>
date Thu, 25 May 2017 22:21:23 +0800
parents 750ec4ec4cbe
children 06d52bcb8094
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1 #ifndef DROPBEAR_NETIO_H
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2 #define DROPBEAR_NETIO_H
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3
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4 #include "includes.h"
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5 #include "buffer.h"
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6 #include "queue.h"
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7
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8 enum dropbear_prio {
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9 DROPBEAR_PRIO_DEFAULT = 10,
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10 DROPBEAR_PRIO_LOWDELAY = 11,
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11 DROPBEAR_PRIO_BULK = 12,
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12 };
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13
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14 void set_sock_nodelay(int sock);
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15 void set_sock_priority(int sock, enum dropbear_prio prio);
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16
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17 void get_socket_address(int fd, char **local_host, char **local_port,
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18 char **remote_host, char **remote_port, int host_lookup);
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19 void getaddrstring(struct sockaddr_storage* addr,
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20 char **ret_host, char **ret_port, int host_lookup);
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21 int dropbear_listen(const char* address, const char* port,
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22 int *socks, unsigned int sockcount, char **errstring, int *maxfd);
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23
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24 struct dropbear_progress_connection;
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25
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26 /* result is DROPBEAR_SUCCESS or DROPBEAR_FAILURE.
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27 errstring is only set on DROPBEAR_FAILURE, returns failure message for the last attempted socket */
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28 typedef void(*connect_callback)(int result, int sock, void* data, const char* errstring);
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29
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30 /* Always returns a progress connection, if it fails it will call the callback at a later point */
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31 struct dropbear_progress_connection * connect_remote (const char* remotehost, const char* remoteport,
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32 connect_callback cb, void *cb_data);
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33
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34 /* Sets up for select() */
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35 void set_connect_fds(fd_set *writefd);
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36 /* Handles ready sockets after select() */
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37 void handle_connect_fds(fd_set *writefd);
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38 /* Cleanup */
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39 void remove_connect_pending(void);
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40
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41 /* Doesn't actually stop the connect, but adds a dummy callback instead */
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42 void cancel_connect(struct dropbear_progress_connection *c);
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43
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44 void connect_set_writequeue(struct dropbear_progress_connection *c, struct Queue *writequeue);
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45
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46 /* TODO: writev #ifdef guard */
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47 /* Fills out iov which contains iov_count slots, returning the number filled in iov_count */
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48 void packet_queue_to_iovec(struct Queue *queue, struct iovec *iov, unsigned int *iov_count);
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49 void packet_queue_consume(struct Queue *queue, ssize_t written);
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51 #if DROPBEAR_SERVER_TCP_FAST_OPEN
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52 /* Try for any Linux builds, will fall back if the kernel doesn't support it */
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53 void set_listen_fast_open(int sock);
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54 /* Define values which may be supported by the kernel even if the libc is too old */
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55 #ifndef TCP_FASTOPEN
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56 #define TCP_FASTOPEN 23
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57 #endif
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58 #ifndef MSG_FASTOPEN
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59 #define MSG_FASTOPEN 0x20000000
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60 #endif
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61 #endif
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62
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63 #endif
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