/
socket.c
1938 lines (1584 loc) · 41.7 KB
/
socket.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Cherokee
*
* Authors:
* Alvaro Lopez Ortega <alvaro@alobbs.com>
*
* Some patches by:
* Ricardo Cardenes Medina <ricardo@conysis.com>
*
* Copyright (C) 2001-2008 Alvaro Lopez Ortega
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include "common-internal.h"
#include "socket.h"
#include <sys/types.h>
#ifdef HAVE_NETINET_TCP_H
# include <netinet/tcp.h>
#endif
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h> /* defines FIONBIO and FIONREAD */
#endif
#ifdef HAVE_SYS_SOCKIO_H
# include <sys/sockio.h> /* defines SIOCATMARK */
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#else
# include <time.h>
#endif
/* sendfile() function related includes
*/
#if defined(LINUX_SENDFILE_API)
# include <sys/sendfile.h>
#elif defined(SOLARIS_SENDFILE_API)
# include <sys/sendfile.h>
#elif defined(HPUX_SENDFILE_API)
# include <sys/socket.h>
#elif defined(FREEBSD_SENDFILE_API)
# include <sys/types.h>
# include <sys/socket.h>
#elif defined(LINUX_BROKEN_SENDFILE_API)
extern int32_t sendfile (int out_fd, int in_fd, int32_t *offset, uint32_t count);
#endif
#ifdef HAVE_SYS_UIO_H
# include <sys/uio.h> /* sendfile and writev() */
#endif
#if !defined(TCP_CORK) && defined(TCP_NOPUSH)
#define TCP_CORK TCP_NOPUSH
#endif
#define ENTRIES "socket"
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "util.h"
#include "buffer.h"
#include "virtual_server.h"
/* Max. sendfile block size (bytes), limiting size of data sent by
* each sendfile call may: improve responsiveness, reduce memory
* pressure, prevent blocking calls, etc.
*
* NOTE: try to reduce block size (down to 64 KB) on small or old
* systems and see if something improves under heavy load.
*/
#define MAX_SF_BLK_SIZE (65536 * 16) /* limit size of block size */
#define MAX_SF_BLK_SIZE2 (MAX_SF_BLK_SIZE + 65536) /* upper limit */
ret_t
cherokee_socket_init (cherokee_socket_t *socket)
{
memset (&socket->client_addr, 0, sizeof(cherokee_sockaddr_t));
socket->client_addr_len = -1;
socket->socket = -1;
socket->status = socket_closed;
socket->is_tls = non_TLS;
#ifdef HAVE_TLS
socket->initialized = false;
socket->vserver_ref = NULL;
#endif
#if defined (HAVE_GNUTLS)
socket->session = NULL;
#elif defined (HAVE_OPENSSL)
socket->session = NULL;
socket->ssl_ctx = NULL;
#endif
return ret_ok;
}
ret_t
cherokee_socket_mrproper (cherokee_socket_t *socket)
{
#if defined (HAVE_GNUTLS)
if (socket->session != NULL) {
gnutls_deinit (socket->session);
socket->session = NULL;
}
#elif defined (HAVE_OPENSSL)
if (socket->session != NULL) {
SSL_free (socket->session);
socket->session = NULL;
}
if (socket->ssl_ctx != NULL) {
SSL_CTX_free (socket->ssl_ctx);
socket->ssl_ctx = NULL;
}
#else
UNUSED (socket);
#endif
return ret_ok;
}
ret_t
cherokee_socket_clean (cherokee_socket_t *socket)
{
socket->socket = -1;
socket->status = socket_closed;
socket->is_tls = non_TLS;
/* Client address
*/
socket->client_addr_len = -1;
memset (&socket->client_addr, 0, sizeof(cherokee_sockaddr_t));
#ifdef HAVE_TLS
socket->initialized = false;
socket->vserver_ref = NULL;
#endif
#if defined (HAVE_GNUTLS)
if (socket->session != NULL) {
gnutls_deinit (socket->session);
socket->session = NULL;
}
#elif defined (HAVE_OPENSSL)
if (socket->session != NULL) {
SSL_free (socket->session);
socket->session = NULL;
}
if (socket->ssl_ctx != NULL) {
SSL_CTX_free (socket->ssl_ctx);
socket->ssl_ctx = NULL;
}
#endif
return ret_ok;
}
#ifdef HAVE_GNUTLS
static const gnutls_datum err_datum = { NULL, 0 };
static gnutls_datum
db_retrieve (void *ptr, gnutls_datum key)
{
ret_t ret;
cherokee_avl_r_t *cache;
cherokee_virtual_server_t *vserver;
gnutls_datum session;
cherokee_buffer_t faked;
cherokee_buffer_t strkey = CHEROKEE_BUF_INIT;
cherokee_socket_t *socket = SOCKET(ptr);
/* Sanity check
*/
vserver = socket->vserver_ref;
if (unlikely (vserver == NULL)) {
PRINT_ERROR_S ("No virtual server reference\n");
return err_datum;
}
cache = &vserver->session_cache;
/* Build the key string
*/
cherokee_buffer_fake (&faked, (char *)key.data, key.size);
ret = cherokee_buffer_encode_hex (&faked, &strkey);
if (ret != ret_ok) {
cherokee_buffer_mrproper (&strkey);
return err_datum;
}
/* Get (and remove) the object from the session cache
*/
ret = cherokee_avl_r_get (cache, &strkey, (void **)&session);
if (ret == ret_ok) {
TRACE (ENTRIES",ssl", "fd=%d key=%s - found=%p\n", socket->socket, strkey.buf, session);
cherokee_buffer_mrproper (&strkey);
return session;
}
/* Failure
*/
TRACE (ENTRIES",ssl", "fd=%d key=%s - error=%d\n", socket->socket, strkey.buf, ret);
cherokee_buffer_mrproper (&strkey);
return err_datum;
}
static int
db_remove (void *ptr, gnutls_datum key)
{
ret_t ret;
cherokee_avl_r_t *cache;
cherokee_virtual_server_t *vserver;
cherokee_buffer_t faked;
cherokee_buffer_t strkey = CHEROKEE_BUF_INIT;
gnutls_datum *n = NULL;
cherokee_socket_t *socket = SOCKET(ptr);
/* Sanity check
*/
vserver = socket->vserver_ref;
if (unlikely (vserver == NULL)) {
PRINT_ERROR_S ("No virtual server reference\n");
return 1;
}
cache = &vserver->session_cache;
/* Build the key string
*/
cherokee_buffer_fake (&faked, (char *)key.data, key.size);
ret = cherokee_buffer_encode_hex (&faked, &strkey);
if (ret != ret_ok) {
cherokee_buffer_mrproper (&strkey);
return -1;
}
/* Remove the entry
*/
ret = cherokee_avl_r_del (cache, &strkey, (void **)&n);
if ((ret == ret_ok) && (n != NULL)) {
TRACE (ENTRIES",ssl", "fd=%d key=%s - found=%p ret=%d\n", socket->socket, strkey.buf, n, ret);
cherokee_buffer_mrproper (&strkey);
gnutls_free (n->data);
gnutls_free (n);
return 0;
}
TRACE (ENTRIES",ssl", "fd=%d key=%s - exiting ret=%d\n", socket->socket, strkey.buf, ret);
cherokee_buffer_mrproper (&strkey);
return -1;
}
static int
db_store (void *ptr, gnutls_datum key, gnutls_datum data)
{
ret_t ret;
cherokee_avl_r_t *cache;
cherokee_virtual_server_t *vserver;
cherokee_buffer_t faked;
cherokee_buffer_t strkey = CHEROKEE_BUF_INIT;
cherokee_socket_t *socket = SOCKET(ptr);
/* Remove the entry
*/
vserver = socket->vserver_ref;
if (vserver == NULL) {
PRINT_ERROR_S ("No virtual server reference\n");
return 1;
}
cache = &vserver->session_cache;
/* Build the key string
*/
cherokee_buffer_fake (&faked, (char *)key.data, key.size);
ret = cherokee_buffer_encode_hex (&faked, &strkey);
if (ret != ret_ok) {
cherokee_buffer_mrproper (&strkey);
return -1;
}
/* Add the copy to the table
*/
ret = cherokee_avl_r_add (cache, &strkey, &data);
TRACE (ENTRIES",ssl", "fd=%d key=%s - added=%p ret=%d\n", socket->socket, strkey.buf, &data, ret);
cherokee_buffer_mrproper (&strkey);
return (ret == ret_ok) ? 0 : -1;
}
#endif /* HAVE_GNUTLS */
#ifdef HAVE_TLS
static ret_t
initialize_tls_session (cherokee_socket_t *socket, cherokee_virtual_server_t *vserver)
{
int re;
/* Set the virtual server object reference
*/
socket->vserver_ref = vserver;
# if defined(HAVE_GNUTLS)
/* Init the TLS session
*/
re = gnutls_init (&socket->session, GNUTLS_SERVER);
if (unlikely (re != GNUTLS_E_SUCCESS)) return ret_error;
/* Set the socket file descriptor
*/
gnutls_transport_set_ptr (socket->session, (gnutls_transport_ptr)socket->socket);
/* Load the credentials
*/
gnutls_set_default_priority (socket->session);
{
static const int kx_priority[] = { GNUTLS_KX_RSA,
GNUTLS_KX_DHE_DSS,
GNUTLS_KX_DHE_RSA,
GNUTLS_KX_ANON_DH, 0 };
gnutls_kx_set_priority (socket->session, kx_priority);
}
/* Set the virtual host credentials
*/
gnutls_credentials_set (socket->session, GNUTLS_CRD_ANON, vserver->credentials);
gnutls_credentials_set (socket->session, GNUTLS_CRD_CERTIFICATE, vserver->credentials);
/* Request client certificate if any.
*/
gnutls_certificate_server_set_request (socket->session, GNUTLS_CERT_REQUEST);
/* Set the number of bits, for use in an Diffie Hellman key
* exchange: minimum size of the prime that will be used for
* the handshake.
*/
gnutls_dh_set_prime_bits (socket->session, 1024);
/* Set the session DB management functions
*/
gnutls_db_set_retrieve_function (socket->session, db_retrieve);
gnutls_db_set_remove_function (socket->session, db_remove);
gnutls_db_set_store_function (socket->session, db_store);
gnutls_db_set_ptr (socket->session, socket);
# elif defined (HAVE_OPENSSL)
/* New session
*/
socket->session = SSL_new (vserver->context);
if (socket->session == NULL) {
char *error;
OPENSSL_LAST_ERROR(error);
PRINT_ERROR ("ERROR: OpenSSL: Unable to create a new SSL "
"connection from the SSL context: %s\n", error);
return ret_error;
}
/* Set the socket file descriptor
*/
re = SSL_set_fd (socket->session, socket->socket);
if (re != 1) {
char *error;
OPENSSL_LAST_ERROR(error);
PRINT_ERROR ("ERROR: OpenSSL: Can not set fd(%d): %s\n",
socket->socket, error);
return ret_error;
}
/* Set the SSL context cache
*/
re = SSL_CTX_set_session_id_context (vserver->context, (const unsigned char *)"SSL", 3);
if (re != 1) {
PRINT_ERROR_S("ERROR: OpenSSL: Unable to set SSL session-id context\n");
}
# endif
return ret_ok;
}
#endif /* HAVE_TLS */
ret_t
cherokee_socket_init_tls (cherokee_socket_t *socket, cherokee_virtual_server_t *vserver)
{
#ifdef HAVE_TLS
int re;
ret_t ret;
socket->is_tls = TLS;
if (socket->initialized == false) {
ret = initialize_tls_session (socket, vserver);
if (ret != ret_ok) return ret;
socket->initialized = true;
}
# if defined (HAVE_GNUTLS)
re = gnutls_handshake (socket->session);
switch (re) {
#if (GNUTLS_E_INTERRUPTED != GNUTLS_E_AGAIN)
case GNUTLS_E_INTERRUPTED:
#endif
case GNUTLS_E_AGAIN:
return ret_eagain;
}
if (re < 0) {
PRINT_ERROR ("ERROR: Init GNUTLS: Handshake has failed: %s\n", gnutls_strerror(re));
return ret_error;
}
# elif defined (HAVE_OPENSSL)
re = SSL_accept (socket->session);
if (re <= 0) {
char *error;
switch (SSL_get_error(socket->session, re)) {
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
case SSL_ERROR_WANT_CONNECT:
return ret_eagain;
default:
OPENSSL_LAST_ERROR(error);
PRINT_ERROR ("ERROR: Init OpenSSL: %s\n", error);
return ret_error;
}
}
# endif
#else
UNUSED (socket);
UNUSED (vserver);
#endif /* HAVE_TLS */
return ret_ok;
}
ret_t
cherokee_socket_close (cherokee_socket_t *socket)
{
ret_t ret;
if (socket->socket < 0) {
return ret_error;
}
#ifdef HAVE_TLS
if (socket->is_tls == TLS && socket->session != NULL) {
#if defined (HAVE_GNUTLS)
gnutls_bye (socket->session, GNUTLS_SHUT_WR);
gnutls_deinit (socket->session);
socket->session = NULL;
#elif defined (HAVE_OPENSSL)
SSL_shutdown (socket->session);
#endif
}
#endif /* HAVE_TLS */
ret = cherokee_close_fd (socket->socket);
TRACE (ENTRIES",close", "fd=%d is_tls=%d re=%d\n",
socket->socket, socket->is_tls, (int) ret);
socket->socket = -1;
socket->status = socket_closed;
socket->is_tls = non_TLS;
return ret;
}
ret_t
cherokee_socket_shutdown (cherokee_socket_t *socket, int how)
{
/* If the read side of the socket has been closed but the
* write side is not, then don't bother to call shutdown
* because the socket is going to be closed anyway.
*/
if (unlikely (socket->status == socket_closed))
return ret_eof;
if (unlikely (socket->socket < 0))
return ret_error;
if (unlikely (shutdown (socket->socket, how) != 0))
return ret_error;
return ret_ok;
}
ret_t
cherokee_socket_ntop (cherokee_socket_t *socket, char *dst, size_t cnt)
{
const char *str = NULL;
errno = EAFNOSUPPORT;
if (SOCKET_FD(socket) < 0) {
return ret_error;
}
/* Only old systems without inet_ntop() function
*/
#ifndef HAVE_INET_NTOP
{
struct sockaddr_in *addr = (struct sockaddr_in *) &SOCKET_ADDR(socket);
str = inet_ntoa (addr->sin_addr);
memcpy(dst, str, strlen(str));
return ret_ok;
}
#endif
#ifdef HAVE_IPV6
if (SOCKET_AF(socket) == AF_INET6) {
struct sockaddr_in6 *addr = (struct sockaddr_in6 *) &SOCKET_ADDR(socket);
str = (char *) inet_ntop (AF_INET6, &addr->sin6_addr, dst, cnt);
if (str == NULL) {
return ret_error;
}
} else
#endif
{
struct sockaddr_in *addr = (struct sockaddr_in *) &SOCKET_ADDR(socket);
str = inet_ntop (AF_INET, &addr->sin_addr, dst, cnt);
if (str == NULL) {
return ret_error;
}
}
return ret_ok;
}
ret_t
cherokee_socket_pton (cherokee_socket_t *socket, cherokee_buffer_t *host)
{
int re;
switch (SOCKET_AF(socket)) {
case AF_INET:
#if defined(HAVE_INET_PTON)
re = inet_pton (AF_INET, host->buf, &SOCKET_SIN_ADDR(socket));
if (re <= 0) return ret_error;
#else
re = inet_aton (host->buf, &SOCKET_SIN_ADDR(socket));
if (re == 0) return ret_error;
#endif
break;
#ifdef HAVE_IPV6
case AF_INET6:
re = inet_pton (AF_INET6, host->buf, &SOCKET_SIN_ADDR(socket));
if (re <= 0) return ret_error;
break;
#endif
default:
PRINT_ERROR ("ERROR: Unknown socket family: %d\n", SOCKET_AF(socket));
return ret_error;
}
return ret_ok;
}
ret_t
cherokee_socket_accept (cherokee_socket_t *socket, int server_socket)
{
ret_t ret;
int fd;
cherokee_sockaddr_t sa;
ret = cherokee_socket_accept_fd (server_socket, &fd, &sa);
if (unlikely(ret < ret_ok))
return ret;
ret = cherokee_socket_set_sockaddr (socket, fd, &sa);
if (unlikely(ret < ret_ok)) {
cherokee_close_fd (fd);
SOCKET_FD(socket) = -1;
return ret;
}
return ret_ok;
}
ret_t
cherokee_socket_set_sockaddr (cherokee_socket_t *socket, int fd, cherokee_sockaddr_t *sa)
{
/* Copy the client address
*/
switch (sa->sa.sa_family) {
case AF_INET:
socket->client_addr_len = sizeof(struct sockaddr_in);
break;
#ifdef HAVE_IPV6
case AF_INET6:
socket->client_addr_len = sizeof(struct sockaddr_in6);
break;
#endif
default:
SHOULDNT_HAPPEN;
return ret_error;
}
memcpy (&socket->client_addr, sa, socket->client_addr_len);
/* Status is no more closed.
*/
socket->status = socket_reading;
SOCKET_FD(socket) = fd;
return ret_ok;
}
ret_t
cherokee_socket_accept_fd (int server_socket, int *new_fd, cherokee_sockaddr_t *sa)
{
socklen_t len;
int new_socket;
int tmp = 1;
/* Get the new connection
*/
len = sizeof (cherokee_sockaddr_t);
new_socket = accept (server_socket, &sa->sa, &len);
if (new_socket < 0) {
int err = SOCK_ERRNO();
/* Caller has to retry the call on ret_deny.
*/
switch (err) {
#if defined(EWOULDBLOCK) && (EWOULDBLOCK != EAGAIN)
case EWOULDBLOCK:
#endif
case EAGAIN:
case EINTR:
/* no data or error.
*/
return ret_eagain;
#ifdef ECONNABORTED
case ECONNABORTED:
/* aborted connection, retry immediately
*/
return ret_deny;
#endif
default:
/* error
*/
return ret_error;
}
/* NOTREACHED */
}
/* Disable Nagle's algorithm for this connection
* so that there is no delay involved when sending data
* which don't fill up a full IP datagram.
*/
setsockopt (new_socket, IPPROTO_TCP, TCP_NODELAY, (const void *)&tmp, sizeof(tmp));
/* Close-on-exec, really needed only
* if *CGI and / or process pipes are used.
*/
CLOSE_ON_EXEC (new_socket);
/* Enables nonblocking I/O.
*/
cherokee_fd_set_nonblocking (new_socket);
*new_fd = new_socket;
return ret_ok;
}
ret_t
cherokee_socket_set_client (cherokee_socket_t *sock, unsigned short int type)
{
/* Create the socket
*/
sock->socket = socket (type, SOCK_STREAM, 0);
if (sock->socket < 0) {
return ret_error;
}
/* Set the family length
*/
switch (type) {
case AF_INET:
sock->client_addr_len = sizeof (struct sockaddr_in);
memset (&sock->client_addr, 0, sock->client_addr_len);
break;
#ifdef HAVE_IPV6
case AF_INET6:
sock->client_addr_len = sizeof (struct sockaddr_in6);
memset (&sock->client_addr, 0, sock->client_addr_len);
break;
#endif
#ifdef HAVE_SOCKADDR_UN
case AF_LOCAL:
memset (&sock->client_addr, 0, sizeof (struct sockaddr_un));
break;
#endif
default:
SHOULDNT_HAPPEN;
return ret_error;
}
/* Set the family
*/
SOCKET_AF(sock) = type;
return ret_ok;
}
static ret_t
cherokee_bind_v4 (cherokee_socket_t *sock, int port, cherokee_buffer_t *listen_to)
{
int re;
ret_t ret;
SOCKET_ADDR_IPv4(sock)->sin_port = htons (port);
if (cherokee_buffer_is_empty (listen_to)) {
SOCKET_ADDR_IPv4(sock)->sin_addr.s_addr = INADDR_ANY;
} else{
ret = cherokee_socket_pton (sock, listen_to);
if (ret != ret_ok) return ret;
}
re = bind (SOCKET_FD(sock), (struct sockaddr *)&SOCKET_ADDR(sock), sock->client_addr_len);
if (re != 0) return ret_error;
return ret_ok;
}
static ret_t
cherokee_bind_v6 (cherokee_socket_t *sock, int port, cherokee_buffer_t *listen_to)
{
int re;
ret_t ret;
SOCKET_ADDR_IPv6(sock)->sin6_port = htons(port);
if (cherokee_buffer_is_empty (listen_to)) {
SOCKET_ADDR_IPv6(sock)->sin6_addr = in6addr_any;
} else{
ret = cherokee_socket_pton (sock, listen_to);
if (ret != ret_ok) return ret;
}
re = bind (SOCKET_FD(sock), (struct sockaddr *)&SOCKET_ADDR(sock), sock->client_addr_len);
if (re != 0) return ret_error;
return ret_ok;
}
static ret_t
cherokee_bind_local (cherokee_socket_t *sock, cherokee_buffer_t *listen_to)
{
#ifdef HAVE_SOCKADDR_UN
int re;
struct stat buf;
/* Sanity check
*/
if ((listen_to->len <= 0) ||
(listen_to->len >= sizeof(SOCKET_SUN_PATH(sock))))
return ret_error;
/* Remove the socket if it already exists
*/
re = stat (listen_to->buf, &buf);
if (re == 0) {
if (! S_ISSOCK(buf.st_mode)) {
PRINT_ERROR ("ERROR: %s isn't a socket!\n", listen_to->buf);
return ret_error;
}
re = unlink (listen_to->buf);
if (re != 0) {
PRINT_ERROR ("ERROR: Couldn't remove %s\n", listen_to->buf);
return ret_error;
}
}
/* Create the socket
*/
memcpy (SOCKET_SUN_PATH(sock), listen_to->buf, listen_to->len + 1);
sock->client_addr_len = sizeof(SOCKET_ADDR_UNIX(sock)->sun_family) + listen_to->len;
re = bind (SOCKET_FD(sock),
(const struct sockaddr *)SOCKET_ADDR_UNIX(sock),
sock->client_addr_len);
if (re != 0) return ret_error;
return ret_ok;
#else
return ret_no_sys;
#endif
}
ret_t
cherokee_socket_bind (cherokee_socket_t *sock, int port, cherokee_buffer_t *listen_to)
{
/* Bind
*/
switch (SOCKET_AF(sock)) {
case AF_INET:
return cherokee_bind_v4 (sock, port, listen_to);
#ifdef HAVE_IPV6
case AF_INET6:
return cherokee_bind_v6 (sock, port, listen_to);
#endif
#ifdef HAVE_SOCKADDR_UN
case AF_LOCAL:
return cherokee_bind_local (sock, listen_to);
#endif
default:
break;
}
SHOULDNT_HAPPEN;
return ret_error;
}
ret_t
cherokee_socket_listen (cherokee_socket_t *socket, int backlog)
{
int re;
re = listen (SOCKET_FD(socket), backlog);
if (re < 0) return ret_error;
return ret_ok;
}
/* WARNING: all parameters MUST be valid,
* NULL pointers lead to a crash.
*/
ret_t
cherokee_socket_write (cherokee_socket_t *socket, const char *buf, int buf_len, size_t *pcnt_written)
{
ssize_t len;
*pcnt_written = 0;
/* There must be something to send, otherwise behaviour is undefined
* and as we don't want this case, we have to enforce assertions.
*/
return_if_fail (buf != NULL && buf_len > 0, ret_error);
#ifdef HAVE_TLS
if (likely (socket->is_tls != TLS)) {
#endif
len = send (SOCKET_FD(socket), buf, buf_len, 0);
if (likely (len > 0) ) {
/* Return n. of bytes sent.
*/
*pcnt_written = len;
return ret_ok;
}
if (len == 0) {
/* Very strange, socket is ready but nothing has been written,
* retry later.
*/
return ret_eagain;
}
/* else len < 0 */
{
int err = SOCK_ERRNO();
switch (err) {
#if defined(EWOULDBLOCK) && (EWOULDBLOCK != EAGAIN)
case EWOULDBLOCK:
#endif
case EAGAIN:
case EINTR:
return ret_eagain;
case EPIPE:
#ifdef ENOTCONN
case ENOTCONN:
#endif
case ECONNRESET:
socket->status = socket_closed;
case ETIMEDOUT:
case EHOSTUNREACH:
return ret_error;
}
PRINT_ERRNO (err, "write(%d, ..): '${errno}'", SOCKET_FD(socket));
return ret_error;
}
#ifdef HAVE_TLS
}
/* TLS connection.
*/
#if defined (HAVE_GNUTLS)
len = gnutls_record_send (socket->session, buf, buf_len);
if (likely (len > 0) ) {
/* Return info
*/
*pcnt_written = len;
return ret_ok;
}
if (len == 0) {
/* Very strange, socket is ready but nothing has been written,
* retry later.
*/
return ret_eagain;
}
{ /* len < 0 */
switch (len) {
case GNUTLS_E_PUSH_ERROR:
case GNUTLS_E_INVALID_SESSION:
socket->status = socket_closed;
return ret_eof;
#if (GNUTLS_E_INTERRUPTED != GNUTLS_E_AGAIN)
case GNUTLS_E_INTERRUPTED:
#endif
case GNUTLS_E_AGAIN:
return ret_eagain;
}