Tor  0.4.6.0-alpha-dev
Macros | Functions
buffers_net.c File Reference

Read and write data on a buf_t object. More...

#include "lib/net/buffers_net.h"
#include "lib/buf/buffers.h"
#include "lib/log/log.h"
#include "lib/log/util_bug.h"
#include "lib/net/nettypes.h"
#include <stdlib.h>

Go to the source code of this file.

Macros

#define BUFFERS_PRIVATE
 
#define check()   STMT_NIL
 

Functions

static int read_to_chunk (buf_t *buf, chunk_t *chunk, tor_socket_t fd, size_t at_most, int *reached_eof, int *error, bool is_socket)
 
static int buf_read_from_fd (buf_t *buf, int fd, size_t at_most, int *reached_eof, int *socket_error, bool is_socket)
 
static int flush_chunk (tor_socket_t fd, buf_t *buf, chunk_t *chunk, size_t sz, bool is_socket)
 
static int buf_flush_to_fd (buf_t *buf, int fd, size_t sz, bool is_socket)
 
int buf_flush_to_socket (buf_t *buf, tor_socket_t s, size_t sz)
 
int buf_read_from_socket (buf_t *buf, tor_socket_t s, size_t at_most, int *reached_eof, int *socket_error)
 
int buf_flush_to_pipe (buf_t *buf, int fd, size_t sz)
 
int buf_read_from_pipe (buf_t *buf, int fd, size_t at_most, int *reached_eof, int *socket_error)
 

Detailed Description

Read and write data on a buf_t object.

Definition in file buffers_net.c.

Function Documentation

◆ buf_flush_to_fd()

static int buf_flush_to_fd ( buf_t *  buf,
int  fd,
size_t  sz,
bool  is_socket 
)
static

Write data from buf to the file descriptor fd. Write at most sz bytes, and remove the written bytes from the buffer. Return the number of bytes written on success, -1 on failure. Return 0 if write() would block.

Definition at line 182 of file buffers_net.c.

Referenced by buf_flush_to_pipe(), and buf_flush_to_socket().

◆ buf_flush_to_pipe()

int buf_flush_to_pipe ( buf_t *  buf,
int  fd,
size_t  sz 
)

Write data from buf to the pipe fd. Write at most sz bytes, decrement *buf_flushlen by the number of bytes actually written, and remove the written bytes from the buffer. Return the number of bytes written on success, -1 on failure. Return 0 if write() would block.

Definition at line 249 of file buffers_net.c.

◆ buf_flush_to_socket()

int buf_flush_to_socket ( buf_t *  buf,
tor_socket_t  s,
size_t  sz 
)

Write data from buf to the socket s. Write at most sz bytes, decrement *buf_flushlen by the number of bytes actually written, and remove the written bytes from the buffer. Return the number of bytes written on success, -1 on failure. Return 0 if write() would block.

Definition at line 224 of file buffers_net.c.

◆ buf_read_from_fd()

static int buf_read_from_fd ( buf_t *  buf,
int  fd,
size_t  at_most,
int *  reached_eof,
int *  socket_error,
bool  is_socket 
)
static

Read from file descriptor fd, writing onto end of buf. Read at most at_most bytes, growing the buffer as necessary. If recv() returns 0 (because of EOF), set *reached_eof to 1 and return 0. Return -1 on error; else return the number of bytes read.

Definition at line 91 of file buffers_net.c.

Referenced by buf_read_from_pipe(), and buf_read_from_socket().

◆ buf_read_from_pipe()

int buf_read_from_pipe ( buf_t *  buf,
int  fd,
size_t  at_most,
int *  reached_eof,
int *  socket_error 
)

Read from pipe fd, writing onto end of buf. Read at most at_most bytes, growing the buffer as necessary. If read() returns 0 (because of EOF), set *reached_eof to 1 and return 0. Return -1 on error; else return the number of bytes read.

Definition at line 260 of file buffers_net.c.

Referenced by process_unix_read_handle().

◆ buf_read_from_socket()

int buf_read_from_socket ( buf_t *  buf,
tor_socket_t  s,
size_t  at_most,
int *  reached_eof,
int *  socket_error 
)

Read from socket s, writing onto end of buf. Read at most at_most bytes, growing the buffer as necessary. If recv() returns 0 (because of EOF), set *reached_eof to 1 and return 0. Return -1 on error; else return the number of bytes read.

Definition at line 235 of file buffers_net.c.

◆ flush_chunk()

static int flush_chunk ( tor_socket_t  fd,
buf_t *  buf,
chunk_t *  chunk,
size_t  sz,
bool  is_socket 
)
inlinestatic

Helper for buf_flush_to_socket(): try to write sz bytes from chunk chunk of buffer buf onto file descriptor fd. Return the number of bytes written on success, 0 on blocking, -1 on failure.

Definition at line 144 of file buffers_net.c.

◆ read_to_chunk()

static int read_to_chunk ( buf_t *  buf,
chunk_t *  chunk,
tor_socket_t  fd,
size_t  at_most,
int *  reached_eof,
int *  error,
bool  is_socket 
)
inlinestatic

Read up to at_most bytes from the file descriptor fd into chunk (which must be on buf). If we get an EOF, set *reached_eof to 1. Uses tor_socket_recv() iff is_socket is true, otherwise it uses read(). Return -1 on error (and sets *error to errno), 0 on eof or blocking, and the number of bytes read otherwise.

Definition at line 44 of file buffers_net.c.