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net_io.c
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net_io.c
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/*
* Copyright (C) 2004-2008 Christos Tsantilas
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA.
*/
#include "common.h"
#include "c-icap.h"
#include <errno.h>
#include "net_io.h"
#include "debug.h"
#include "net_io.h"
#include "util.h"
#ifdef USE_OPENSSL
#include "net_io_ssl.h"
#endif
#include <assert.h>
#ifdef USE_IPV6
void ci_fill_sockaddr(ci_sockaddr_t * addr)
{
addr->ci_sin_family = addr->sockaddr.ss_family;
if (addr->ci_sin_family == AF_INET6) {
addr->ci_sin_port =
((struct sockaddr_in6 *) &(addr->sockaddr))->sin6_port;
addr->ci_sin_addr =
&(((struct sockaddr_in6 *) &(addr->sockaddr))->sin6_addr);
addr->ci_inaddr_len = sizeof(struct in6_addr);
} else {
addr->ci_sin_port =
((struct sockaddr_in *) &(addr->sockaddr))->sin_port;
addr->ci_sin_addr =
&(((struct sockaddr_in *) &(addr->sockaddr))->sin_addr);
addr->ci_inaddr_len = sizeof(struct in_addr);
}
}
void ci_copy_sockaddr(ci_sockaddr_t * dest, ci_sockaddr_t * src)
{
memcpy(dest, src, sizeof(ci_sockaddr_t));
if (dest->ci_sin_family == AF_INET6)
dest->ci_sin_addr =
&(((struct sockaddr_in6 *) &(dest->sockaddr))->sin6_addr);
else
dest->ci_sin_addr =
&(((struct sockaddr_in *) &(dest->sockaddr))->sin_addr);
}
#else
void ci_fill_sockaddr(ci_sockaddr_t * addr)
{
addr->ci_sin_family = addr->sockaddr.sin_family;
addr->ci_sin_port = addr->sockaddr.sin_port;
addr->ci_sin_addr = &(addr->sockaddr.sin_addr);
addr->ci_inaddr_len = sizeof(struct in_addr);
}
void ci_copy_sockaddr(ci_sockaddr_t * dest, ci_sockaddr_t * src)
{
memcpy(dest, src, sizeof(ci_sockaddr_t));
dest->ci_sin_addr = &(dest->sockaddr.sin_addr);
}
#endif
void ci_fill_ip_t(ci_ip_t *ip_dest, ci_sockaddr_t *src)
{
ip_dest->family = src->ci_sin_family;
memcpy(&ip_dest->address,src->ci_sin_addr,sizeof(ci_in_addr_t));
#ifdef USE_IPV6
if (ip_dest->family == AF_INET6)
ci_ipv6_inaddr_hostnetmask(ip_dest->netmask);
else
ci_ipv4_inaddr_hostnetmask(ip_dest->netmask);
#else
ci_ipv4_inaddr_hostnetmask(ip_dest->netmask);
#endif
}
#ifdef USE_IPV6
void ci_sockaddr_set_port(ci_sockaddr_t * addr, int port)
{
if (addr->sockaddr.ss_family == AF_INET) {
((struct sockaddr_in *) &(addr->sockaddr))->sin_port = htons(port);
addr->ci_sin_port =
((struct sockaddr_in6 *) &(addr->sockaddr))->sin6_port;
} else {
((struct sockaddr_in6 *) &(addr->sockaddr))->sin6_port = htons(port);
addr->ci_sin_port =
((struct sockaddr_in *) &(addr->sockaddr))->sin_port;
}
}
#else
void ci_sockaddr_set_port(ci_sockaddr_t * addr, int port)
{
addr->sockaddr.sin_port = htons(port);
addr->ci_sin_port = addr->sockaddr.sin_port;
}
#endif
const char *ci_sockaddr_t_to_ip(ci_sockaddr_t * addr, char *ip, int maxlen)
{
return ci_inet_ntoa(addr->ci_sin_family, addr->ci_sin_addr, ip, maxlen);
}
/*
Needed check in configure.in for inet_pton and inet_ntop ?
For Linux and Solaris exists.
But I did not found these functions in win32 for example .
*/
int ci_inet_aton(int af, const char *cp, void *addr)
{
#ifdef USE_IPV6
return inet_pton(af, cp, addr);
#else
#ifdef HAVE_INET_ATON
return inet_aton(cp, (struct in_addr *) addr);
#else
((struct in_addr *) addr)->s_addr = inet_addr(cp);
if (((struct in_addr *) addr)->s_addr == 0xffffffff
&& strcmp(cp, "255.255.255.255") != 0)
return 0; /*0xffffffff =255.255.255.255 which is a valid address */
return 1;
#endif
#endif /*USE_IPV6 */
}
const char *ci_inet_ntoa(int af, const void *src, char *dst, int cnt)
{
#ifdef USE_IPV6
return inet_ntop(af, src, dst, cnt);
#else
unsigned char *addr_bytes;
addr_bytes = (unsigned char *) src;
snprintf(dst, cnt, "%d.%d.%d.%d", addr_bytes[0], addr_bytes[1],
addr_bytes[2], addr_bytes[3]);
dst[cnt - 1] = '\0';
return (const char *) dst;
#endif
}
void ci_copy_connection(ci_connection_t * dest, ci_connection_t * src)
{
dest->fd = src->fd;
ci_copy_sockaddr(&dest->claddr, &src->claddr);
ci_copy_sockaddr(&dest->srvaddr, &src->srvaddr);
#if defined(USE_OPENSSL)
dest->tls_conn_pcontext = src->tls_conn_pcontext;
#endif
dest->flags = src->flags;
}
void ci_connection_reset(ci_connection_t *conn)
{
conn->fd = CI_SOCKET_INVALID;
#if defined(USE_OPENSSL)
conn->tls_conn_pcontext = NULL;
#endif
conn->flags = 0;
}
int ci_connection_init(ci_connection_t *conn, ci_connection_type_t type)
{
socklen_t claddrlen;
struct sockaddr *addr;
assert(type == ci_connection_server_side || type == ci_connection_client_side);
if (type == ci_connection_server_side) {
claddrlen = sizeof(conn->srvaddr.sockaddr);
addr = (struct sockaddr *) &(conn->srvaddr.sockaddr);
} else {
claddrlen = sizeof(conn->claddr.sockaddr);
addr = (struct sockaddr *) &(conn->claddr.sockaddr);
}
if (getsockname(conn->fd, addr, &claddrlen)) {
/* caller should handle the error */
return 0;
}
ci_fill_sockaddr(&(conn->claddr));
ci_fill_sockaddr(&(conn->srvaddr));
ci_connection_set_nonblock(conn);
return 1;
}
int ci_host_to_sockaddr_t(const char *servername, ci_sockaddr_t * addr, int proto)
{
int ret = 0;
struct addrinfo hints, *res;
memset(&hints, 0, sizeof(hints));
hints.ai_family = proto;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
if ((ret = getaddrinfo(servername, NULL, &hints, &res)) != 0) {
ci_debug_printf(5, "Error getting addrinfo for '%s':%s\n", servername, gai_strerror(ret));
return 0;
}
//fill the addr..... and
memcpy(&(addr->sockaddr), res->ai_addr, CI_SOCKADDR_SIZE);
freeaddrinfo(res);
ci_fill_sockaddr(addr);
return 1;
}
ci_connection_t *ci_connection_create()
{
ci_connection_t *connection = malloc(sizeof(ci_connection_t));
if (connection)
ci_connection_reset(connection);
return connection;
}
/**
* Close and free the given connection
*/
void ci_connection_destroy(ci_connection_t *connection)
{
if ( connection ) {
if (ci_socket_valid(connection->fd))
ci_connection_hard_close(connection);
free(connection);
}
}
int ci_connect_to_nonblock(ci_connection_t *connection, const char *servername, int port, int proto)
{
char errBuf[512];
int errcode;
if (!connection)
return -1;
if (!ci_socket_valid(connection->fd)) {
if (!ci_host_to_sockaddr_t(servername, &(connection->srvaddr), proto)) {
ci_debug_printf(1, "Error getting address info for host '%s'\n", servername);
return -1;
}
ci_sockaddr_set_port(&(connection->srvaddr), port);
connection->fd = ci_socket_connect(&(connection->srvaddr), &errcode);
if (!ci_socket_valid(connection->fd)) {
ci_debug_printf(1, "Error connecting to host '%s': %s \n",
servername,
ci_strerror(errcode, errBuf, sizeof(errBuf)));
return -1;
}
return 0;
}
if (!(connection->flags & CI_CONNECTION_CONNECTED)) {
if ((errcode = ci_socket_connected_ok(connection->fd)) != 0) {
ci_debug_printf(1, "Error while connecting to host '%s': %s\n",
servername,
ci_strerror(errcode, errBuf, sizeof(errBuf)));
return -1;
}
if (!ci_connection_init(connection, ci_connection_client_side)) {
ci_debug_printf(1, "Error initializing connection to '%s': %s\n",
servername,
ci_strerror(errno, errBuf, sizeof(errBuf)));
return -1;
}
connection->flags &= CI_CONNECTION_CONNECTED;
}
return 1;
}
ci_connection_t *ci_connect_to(const char *servername, int port, int proto, int timeout)
{
int ret;
ci_connection_t *connection = ci_connection_create();
if (!connection) {
ci_debug_printf(1, "Failed to allocate memory for ci_connection_t object\n");
return NULL;
}
ret = ci_connect_to_nonblock(connection, servername, port, proto);
if (ret < 0)
return NULL;
do {
ret = ci_wait_for_data(connection->fd, timeout, ci_wait_for_write);
} while (ret > 0 && (ret & ci_wait_should_retry)); //while iterrupted by signal
if (ret > 0)
ret = ci_connect_to_nonblock(connection, servername, port, proto);
if (ret <= 0) {
ci_debug_printf(1, "Connection to '%s:%d' failed/timedout\n",
servername, port);
ci_connection_destroy(connection);
return NULL;
}
return connection;
}
int ci_connection_wait(ci_connection_t *conn, int secs, int what_wait)
{
assert(conn);
#ifdef USE_OPENSSL
if (ci_connection_is_tls(conn))
return ci_connection_wait_tls(conn, secs, what_wait);
#endif
return ci_wait_for_data(conn->fd, secs, what_wait);
}
int ci_connection_read(ci_connection_t *conn, void *buf, size_t count, int timeout)
{
assert(conn);
#ifdef USE_OPENSSL
if (ci_connection_is_tls(conn))
return ci_connection_read_tls(conn, buf, count, timeout);
#endif
return ci_read(conn->fd, buf, count, timeout);
}
int ci_connection_write(ci_connection_t *conn, void *buf, size_t count, int timeout)
{
assert(conn);
#ifdef USE_OPENSSL
if (ci_connection_is_tls(conn))
return ci_connection_write_tls(conn, buf, count, timeout);
#endif
return ci_write(conn->fd, buf, count, timeout);
}
int ci_connection_read_nonblock(ci_connection_t *conn, void *buf, size_t count)
{
assert(conn);
#ifdef USE_OPENSSL
if (ci_connection_is_tls(conn))
return ci_connection_read_nonblock_tls(conn, buf, count);
#endif
return ci_read_nonblock(conn->fd, buf, count);
}
int ci_connection_write_nonblock(ci_connection_t *conn, void *buf, size_t count)
{
assert(conn);
#ifdef USE_OPENSSL
if (ci_connection_is_tls(conn))
return ci_connection_write_nonblock_tls(conn, buf, count);
#endif
return ci_write_nonblock(conn->fd, buf, count);
}
int ci_connection_linger_close(ci_connection_t *conn, int timeout)
{
assert(conn);
#ifdef USE_OPENSSL
if (ci_connection_is_tls(conn))
return ci_connection_linger_close_tls(conn, timeout);
#endif
return ci_linger_close(conn->fd, timeout);
}
int ci_connection_hard_close(ci_connection_t *conn)
{
assert(conn);
#ifdef USE_OPENSSL
if (ci_connection_is_tls(conn))
return ci_connection_hard_close_tls(conn);
#endif
ci_hard_close(conn->fd);
conn->fd = CI_SOCKET_INVALID;
return 1;
}