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network-address.c
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357 lines (296 loc) · 9.02 KB
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/* $%BEGINLICENSE%$
Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the
License.
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., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
$%ENDLICENSE%$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef _WIN32
#include <sys/ioctl.h>
#include <sys/socket.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <arpa/inet.h> /** inet_ntoa */
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <unistd.h>
#else
#include <winsock2.h>
#include <io.h>
#define ioctl ioctlsocket
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <glib.h>
#include <glib/gstdio.h>
#include "network-address.h"
#include "glib-ext.h"
#define C(x) x, sizeof(x) - 1
#define S(x) x->str, x->len
network_address *network_address_new() {
network_address *addr;
addr = g_new0(network_address, 1);
addr->len = sizeof(addr->addr.common);
addr->name = g_string_new(NULL);
return addr;
}
void network_address_free(network_address *addr) {
if (!addr) return;
#ifndef WIN32
/*
* if the name we're freeing starts with a '/', we're
* looking at a unix socket which needs to be removed
*/
if (addr->can_unlink_socket == TRUE && addr->name != NULL &&
addr->name->str != NULL) {
gchar *name;
int ret;
name = addr->name->str;
if (name[0] == '/') {
ret = g_remove(name);
if (ret == 0) {
g_debug("%s: removing socket %s successful",
G_STRLOC, name);
} else {
if (errno != EPERM && errno != EACCES) {
g_critical("%s: removing socket %s failed: %s (%d)",
G_STRLOC, name, strerror(errno), errno);
}
}
}
}
#endif /* WIN32 */
g_string_free(addr->name, TRUE);
g_free(addr);
}
void network_address_reset(network_address *addr) {
addr->len = sizeof(addr->addr.common);
}
static gint network_address_set_address_ip(network_address *addr, const gchar *address, guint port) {
g_return_val_if_fail(addr, -1);
if (port > 65535) {
g_critical("%s: illegal value %u for port, only 1 ... 65535 allowed",
G_STRLOC, port);
return -1;
}
memset(&addr->addr.ipv4, 0, sizeof(struct sockaddr_in));
if (NULL == address ||
strlen(address) == 0 ||
0 == strcmp("0.0.0.0", address)) {
/* no ip */
addr->addr.ipv4.sin_addr.s_addr = htonl(INADDR_ANY);
addr->addr.ipv4.sin_family = AF_INET; /* "default" family */
} else {
#ifdef HAVE_GETADDRINFO
struct addrinfo *ai = NULL, hint;
int rc, family;
memset(&hint, 0, sizeof (hint));
/*
* FIXME: when we add support for IPv6, we'll have to do one
* PF_INET* after the other
*/
hint.ai_family = PF_INET;
if ((rc = getaddrinfo(address, NULL, &hint, &ai)) != 0) {
g_critical("getaddrinfo(%s) failed with %s", address,
gai_strerror(rc));
return -1;
}
do {
family = ai->ai_family;
#if 0 /* keep this for when we do IPv6 */
if (family == PF_INET6) {
memcpy(&addr->addr.ipv6,
(struct sockaddr_in6 *) ai->ai_addr,
sizeof (addr->addr.ipv6));
break;
}
#endif /* 0 */
if (family == PF_INET) {
memcpy(&addr->addr.ipv4,
(struct sockaddr_in *) ai->ai_addr,
sizeof (addr->addr.ipv4));
break;
}
ai = ai->ai_next;
} while (NULL != ai);
if (ai == NULL) {
/* the family we print here is the *last* ai's */
g_critical("address %s doesn't resolve to a valid/supported "
"address family: %d expected, last found %d", address,
PF_INET, family);
freeaddrinfo(ai);
return -1;
}
freeaddrinfo(ai);
#else
struct hostent *he;
static GStaticMutex gh_mutex = G_STATIC_MUTEX_INIT; /*remove lock*/
g_static_mutex_lock(&gh_mutex); /*remove lock*/
he = gethostbyname(address);
if (NULL == he) {
g_static_mutex_unlock(&gh_mutex); /*remove lock*/
return -1;
}
g_assert(he->h_addrtype == AF_INET);
g_assert(he->h_length == sizeof(struct in_addr));
memcpy(&(addr->addr.ipv4.sin_addr.s_addr), he->h_addr_list[0], he->h_length);
g_static_mutex_unlock(&gh_mutex); /*remove lock*/
addr->addr.ipv4.sin_family = AF_INET;
#endif /* HAVE_GETADDRINFO */
}
addr->addr.ipv4.sin_port = htons(port);
addr->len = sizeof(struct sockaddr_in);
(void) network_address_refresh_name(addr);
return 0;
}
static gint network_address_set_address_un(network_address *addr, const gchar *address) {
g_return_val_if_fail(addr, -1);
g_return_val_if_fail(address, -1);
#ifdef HAVE_SYS_UN_H
if (strlen(address) >= sizeof(addr->addr.un.sun_path) - 1) {
g_critical("unix-path is too long: %s", address);
return -1;
}
addr->addr.un.sun_family = AF_UNIX;
strcpy(addr->addr.un.sun_path, address);
addr->len = sizeof(struct sockaddr_un);
network_address_refresh_name(addr);
return 0;
#else
return -1;
#endif
}
/**
* translate a address-string into a network_address structure
*
* - if the address contains a colon we assume IPv4,
* - ":3306" -> (tcp) "0.0.0.0:3306"
* - if it starts with a / it is a unix-domain socket
* - "/tmp/socket" -> (unix) "/tmp/socket"
*
* @param addr the address-struct
* @param address the address string
* @return 0 on success, -1 otherwise
*/
gint network_address_set_address(network_address *addr, const gchar *address) {
gchar *s;
g_return_val_if_fail(addr, -1);
/* split the address:port */
if (address[0] == '/')
return network_address_set_address_un(addr, address);
if (NULL != (s = strchr(address, ':'))) {
gint ret;
char *ip_address = g_strndup(address, s - address); /* may be NULL for strdup(..., 0) */
char *port_err = NULL;
guint port = strtoul(s + 1, &port_err, 10);
if (*(s + 1) == '\0') {
g_critical("%s: IP-address has to be in the form [<ip>][:<port>], is '%s'. No port number",
G_STRLOC, address);
ret = -1;
} else if (*port_err != '\0') {
g_critical("%s: IP-address has to be in the form [<ip>][:<port>], is '%s'. Failed to parse the port at '%s'",
G_STRLOC, address, port_err);
ret = -1;
} else {
ret = network_address_set_address_ip(addr, ip_address, port);
}
if (ip_address) g_free(ip_address);
return ret;
}
/* perhaps it is a plain IP address, lets add the default-port */
return network_address_set_address_ip(addr, address, 3306);
}
gint network_address_refresh_name(network_address *addr) {
/* resolve the peer-addr if we haven't done so yet */
if (addr->name->len > 0) return 0;
switch (addr->addr.common.sa_family) {
case AF_INET:
g_string_printf(addr->name, "%s:%d",
inet_ntoa(addr->addr.ipv4.sin_addr),
ntohs(addr->addr.ipv4.sin_port));
break;
#ifdef HAVE_SYS_UN_H
case AF_UNIX:
g_string_assign(addr->name, addr->addr.un.sun_path);
break;
#endif
default:
if (addr->addr.common.sa_family > AF_MAX)
g_debug("%s.%d: ignoring invalid sa_family %d", __FILE__, __LINE__, addr->addr.common.sa_family);
else
g_warning("%s.%d: can't convert addr-type %d into a string",
__FILE__, __LINE__,
addr->addr.common.sa_family);
return -1;
}
return 0;
}
/**
* check if the host-part of the address is equal
*/
gboolean network_address_is_local(network_address *dst_addr, network_address *src_addr) {
if (src_addr->addr.common.sa_family != dst_addr->addr.common.sa_family) {
#ifdef HAVE_SYS_UN_H
if (src_addr->addr.common.sa_family == AF_UNIX ||
dst_addr->addr.common.sa_family == AF_UNIX) {
/* AF_UNIX is always local,
* even if one of the two sides doesn't return a reasonable protocol
*
* see #42220
*/
return TRUE;
}
#endif
g_message("%s: is-local family %d != %d",
G_STRLOC,
src_addr->addr.common.sa_family,
dst_addr->addr.common.sa_family
);
return FALSE;
}
switch (src_addr->addr.common.sa_family) {
case AF_INET:
/* inet_ntoa() returns a pointer to a static buffer
* we can't call it twice in the same function-call */
g_debug("%s: is-local src: %s(:%d) =? ...",
G_STRLOC,
inet_ntoa(src_addr->addr.ipv4.sin_addr),
ntohs(src_addr->addr.ipv4.sin_port));
g_debug("%s: is-local dst: %s(:%d)",
G_STRLOC,
inet_ntoa(dst_addr->addr.ipv4.sin_addr),
ntohs(dst_addr->addr.ipv4.sin_port)
);
return (dst_addr->addr.ipv4.sin_addr.s_addr == src_addr->addr.ipv4.sin_addr.s_addr);
#ifdef HAVE_SYS_UN_H
case AF_UNIX:
/* we are always local */
return TRUE;
#endif
default:
g_critical("%s: sa_family = %d", G_STRLOC, src_addr->addr.common.sa_family);
return FALSE;
}
}
network_address *network_address_copy(network_address *dst, network_address *src) {
if (!dst) dst = network_address_new();
dst->len = src->len;
dst->addr = src->addr;
g_string_assign_len(dst->name, S(src->name));
return dst;
}