flm01/mote/v2/openwrt/package/luci/libs/nixio/src/address.c

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/*
* nixio - Linux I/O library for lua
*
* Copyright (C) 2009 Steven Barth <steven@midlink.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "nixio.h"
#include <sys/types.h>
#include <sys/param.h>
#include <errno.h>
#include <string.h>
#ifdef __linux__
#include <linux/netdevice.h>
/* struct net_device_stats is buggy on amd64, redefine it */
struct nixio__nds {
uint32_t rx_packets;
uint32_t tx_packets;
uint32_t rx_bytes;
uint32_t tx_bytes;
uint32_t rx_errors;
uint32_t tx_errors;
uint32_t rx_dropped;
uint32_t tx_dropped;
uint32_t multicast;
uint32_t collisions;
uint32_t rx_length_errors;
uint32_t rx_over_errors;
uint32_t rx_crc_errors;
uint32_t rx_frame_errors;
uint32_t rx_fifo_errors;
uint32_t rx_missed_errors;
uint32_t tx_aborted_errors;
uint32_t tx_carrier_errors;
uint32_t tx_fifo_errors;
uint32_t tx_heartbeat_errors;
uint32_t tx_window_errors;
uint32_t rx_compressed;
uint32_t tx_compressed;
};
#endif
#ifndef NI_MAXHOST
#define NI_MAXHOST 1025
#endif
/**
* address pushing helper
*/
int nixio__addr_parse(nixio_addr *addr, struct sockaddr *saddr) {
void *baddr;
addr->family = saddr->sa_family;
if (saddr->sa_family == AF_INET) {
struct sockaddr_in *inetaddr = (struct sockaddr_in*)saddr;
addr->port = ntohs(inetaddr->sin_port);
baddr = &inetaddr->sin_addr;
} else if (saddr->sa_family == AF_INET6) {
struct sockaddr_in6 *inet6addr = (struct sockaddr_in6*)saddr;
addr->port = ntohs(inet6addr->sin6_port);
baddr = &inet6addr->sin6_addr;
#ifdef AF_PACKET
} else if (saddr->sa_family == AF_PACKET) {
struct sockaddr_ll *etheradddr = (struct sockaddr_ll*)saddr;
addr->prefix = etheradddr->sll_hatype;
addr->port = etheradddr->sll_ifindex;
char *c = addr->host;
for (size_t i = 0; i < etheradddr->sll_halen; i++) {
*c++ = nixio__bin2hex[(etheradddr->sll_addr[i] & 0xf0) >> 4];
*c++ = nixio__bin2hex[(etheradddr->sll_addr[i] & 0x0f)];
*c++ = ':';
}
*(c-1) = 0;
return 0;
#endif
} else {
errno = EAFNOSUPPORT;
return -1;
}
if (!inet_ntop(saddr->sa_family, baddr, addr->host, sizeof(addr->host))) {
return -1;
}
return 0;
}
/**
* address pulling helper
*/
int nixio__addr_write(nixio_addr *addr, struct sockaddr *saddr) {
if (addr->family == AF_UNSPEC) {
if (strchr(addr->host, ':')) {
addr->family = AF_INET6;
} else {
addr->family = AF_INET;
}
}
if (addr->family == AF_INET) {
struct sockaddr_in *inetaddr = (struct sockaddr_in *)saddr;
memset(inetaddr, 0, sizeof(struct sockaddr_in));
if (inet_pton(AF_INET, addr->host, &inetaddr->sin_addr) < 1) {
return -1;
}
inetaddr->sin_family = AF_INET;
inetaddr->sin_port = htons((uint16_t)addr->port);
return 0;
} else if (addr->family == AF_INET6) {
struct sockaddr_in6 *inet6addr = (struct sockaddr_in6 *)saddr;
memset(inet6addr, 0, sizeof(struct sockaddr_in6));
if (inet_pton(AF_INET6, addr->host, &inet6addr->sin6_addr) < 1) {
return -1;
}
inet6addr->sin6_family = AF_INET6;
inet6addr->sin6_port = htons((uint16_t)addr->port);
return 0;
} else {
errno = EAFNOSUPPORT;
return -1;
}
}
/**
* netmask to prefix helper
*/
int nixio__addr_prefix(struct sockaddr *saddr) {
int prefix = 0;
size_t len;
uint8_t *addr;
if (saddr->sa_family == AF_INET) {
addr = (uint8_t*)(&((struct sockaddr_in*)saddr)->sin_addr);
len = 4;
} else if (saddr->sa_family == AF_INET6) {
addr = (uint8_t*)(&((struct sockaddr_in6*)saddr)->sin6_addr);
len = 16;
} else {
errno = EAFNOSUPPORT;
return -1;
}
for (size_t i = 0; i < len; i++) {
if (addr[i] == 0xff) {
prefix += 8;
} else if (addr[i] == 0x00) {
break;
} else {
for (uint8_t c = addr[i]; c; c <<= 1) {
prefix++;
}
}
}
return prefix;
}
/**
* getaddrinfo(host, family, port)
*/
static int nixio_getaddrinfo(lua_State *L) {
const char *host = NULL;
if (!lua_isnoneornil(L, 1)) {
host = luaL_checklstring(L, 1, NULL);
}
const char *family = luaL_optlstring(L, 2, "any", NULL);
const char *port = lua_tolstring(L, 3, NULL);
struct addrinfo hints, *result, *rp;
memset(&hints, 0, sizeof(hints));
if (!strcmp(family, "any")) {
hints.ai_family = AF_UNSPEC;
} else if (!strcmp(family, "inet")) {
hints.ai_family = AF_INET;
} else if (!strcmp(family, "inet6")) {
hints.ai_family = AF_INET6;
} else {
return luaL_argerror(L, 2, "supported values: any, inet, inet6");
}
hints.ai_socktype = 0;
hints.ai_protocol = 0;
int aistat = getaddrinfo(host, port, &hints, &result);
if (aistat) {
lua_pushnil(L);
lua_pushinteger(L, aistat);
lua_pushstring(L, gai_strerror(aistat));
return 3;
}
/* create socket object */
lua_newtable(L);
int i = 1;
for (rp = result; rp != NULL; rp = rp->ai_next) {
/* avoid duplicate results */
#ifndef __WINNT__
if (!port && rp->ai_socktype != SOCK_STREAM) {
continue;
}
#endif
if (rp->ai_family == AF_INET || rp->ai_family == AF_INET6) {
lua_createtable(L, 0, port ? 4 : 2);
if (rp->ai_family == AF_INET) {
lua_pushliteral(L, "inet");
} else if (rp->ai_family == AF_INET6) {
lua_pushliteral(L, "inet6");
}
lua_setfield(L, -2, "family");
if (port) {
switch (rp->ai_socktype) {
case SOCK_STREAM:
lua_pushliteral(L, "stream");
break;
case SOCK_DGRAM:
lua_pushliteral(L, "dgram");
break;
case SOCK_RAW:
lua_pushliteral(L, "raw");
break;
default:
lua_pushnil(L);
break;
}
lua_setfield(L, -2, "socktype");
}
nixio_addr addr;
if (nixio__addr_parse(&addr, rp->ai_addr)) {
freeaddrinfo(result);
return nixio__perror_s(L);
}
if (port) {
lua_pushinteger(L, addr.port);
lua_setfield(L, -2, "port");
}
lua_pushstring(L, addr.host);
lua_setfield(L, -2, "address");
lua_rawseti(L, -2, i++);
}
}
freeaddrinfo(result);
return 1;
}
/**
* getnameinfo(address, family)
*/
static int nixio_getnameinfo(lua_State *L) {
const char *ip = luaL_checkstring(L, 1);
const char *family = luaL_optstring(L, 2, NULL);
char host[NI_MAXHOST];
struct sockaddr_storage saddr;
nixio_addr addr;
memset(&addr, 0, sizeof(addr));
strncpy(addr.host, ip, sizeof(addr.host) - 1);
if (!family) {
addr.family = AF_UNSPEC;
} else if (!strcmp(family, "inet")) {
addr.family = AF_INET;
} else if (!strcmp(family, "inet6")) {
addr.family = AF_INET6;
} else {
return luaL_argerror(L, 2, "supported values: inet, inet6");
}
nixio__addr_write(&addr, (struct sockaddr *)&saddr);
int res = getnameinfo((struct sockaddr *)&saddr, sizeof(saddr),
host, sizeof(host), NULL, 0, NI_NAMEREQD);
if (res) {
lua_pushnil(L);
lua_pushinteger(L, res);
lua_pushstring(L, gai_strerror(res));
return 3;
} else {
lua_pushstring(L, host);
return 1;
}
}
/**
* getsockname()
*/
static int nixio_sock_getsockname(lua_State *L) {
int sockfd = nixio__checksockfd(L);
struct sockaddr_storage saddr;
socklen_t addrlen = sizeof(saddr);
nixio_addr addr;
if (getsockname(sockfd, (struct sockaddr*)&saddr, &addrlen) ||
nixio__addr_parse(&addr, (struct sockaddr*)&saddr)) {
return nixio__perror_s(L);
}
lua_pushstring(L, addr.host);
lua_pushinteger(L, addr.port);
return 2;
}
/**
* getpeername()
*/
static int nixio_sock_getpeername(lua_State *L) {
int sockfd = nixio__checksockfd(L);
struct sockaddr_storage saddr;
socklen_t addrlen = sizeof(saddr);
nixio_addr addr;
if (getpeername(sockfd, (struct sockaddr*)&saddr, &addrlen) ||
nixio__addr_parse(&addr, (struct sockaddr*)&saddr)) {
return nixio__perror_s(L);
}
lua_pushstring(L, addr.host);
lua_pushinteger(L, addr.port);
return 2;
}
#if defined(__linux__) || defined(BSD)
#ifdef BSD
#include <net/if.h>
#endif
#include <ifaddrs.h>
static int nixio_getifaddrs(lua_State *L) {
nixio_addr addr;
struct ifaddrs *ifaddr, *c;
if (getifaddrs(&ifaddr) == -1) {
return nixio__perror(L);
}
lua_newtable(L);
unsigned int i = 1;
for (c = ifaddr; c; c = c->ifa_next) {
lua_newtable(L);
lua_pushstring(L, c->ifa_name);
lua_setfield(L, -2, "name");
lua_createtable(L, 0, 7);
lua_pushboolean(L, c->ifa_flags & IFF_UP);
lua_setfield(L, -2, "up");
lua_pushboolean(L, c->ifa_flags & IFF_BROADCAST);
lua_setfield(L, -2, "broadcast");
lua_pushboolean(L, c->ifa_flags & IFF_LOOPBACK);
lua_setfield(L, -2, "loopback");
lua_pushboolean(L, c->ifa_flags & IFF_POINTOPOINT);
lua_setfield(L, -2, "pointtopoint");
lua_pushboolean(L, c->ifa_flags & IFF_NOARP);
lua_setfield(L, -2, "noarp");
lua_pushboolean(L, c->ifa_flags & IFF_PROMISC);
lua_setfield(L, -2, "promisc");
lua_pushboolean(L, c->ifa_flags & IFF_MULTICAST);
lua_setfield(L, -2, "multicast");
lua_setfield(L, -2, "flags");
if (c->ifa_addr) {
if (!nixio__addr_parse(&addr, c->ifa_addr)) {
lua_pushstring(L, addr.host);
lua_setfield(L, -2, "addr");
}
if (c->ifa_addr->sa_family == AF_INET) {
lua_pushliteral(L, "inet");
} else if (c->ifa_addr->sa_family == AF_INET6) {
lua_pushliteral(L, "inet6");
#ifdef AF_PACKET
} else if (c->ifa_addr->sa_family == AF_PACKET) {
lua_pushliteral(L, "packet");
#endif
} else {
lua_pushliteral(L, "unknown");
}
lua_setfield(L, -2, "family");
#ifdef __linux__
if (c->ifa_addr->sa_family == AF_PACKET) {
lua_pushinteger(L, addr.port);
lua_setfield(L, -2, "ifindex");
lua_pushinteger(L, addr.prefix);
lua_setfield(L, -2, "hatype");
}
#endif
}
#ifdef __linux__
if (c->ifa_data && (!c->ifa_addr
|| c->ifa_addr->sa_family == AF_PACKET)) {
if (!c->ifa_addr) {
lua_pushliteral(L, "packet");
lua_setfield(L, -2, "family");
}
lua_createtable(L, 0, 10);
struct nixio__nds *stats = c->ifa_data;
lua_pushnumber(L, stats->rx_packets);
lua_setfield(L, -2, "rx_packets");
lua_pushnumber(L, stats->tx_packets);
lua_setfield(L, -2, "tx_packets");
lua_pushnumber(L, stats->rx_bytes);
lua_setfield(L, -2, "rx_bytes");
lua_pushnumber(L, stats->tx_bytes);
lua_setfield(L, -2, "tx_bytes");
lua_pushnumber(L, stats->rx_errors);
lua_setfield(L, -2, "rx_errors");
lua_pushnumber(L, stats->tx_errors);
lua_setfield(L, -2, "tx_errors");
lua_pushnumber(L, stats->rx_dropped);
lua_setfield(L, -2, "rx_dropped");
lua_pushnumber(L, stats->tx_dropped);
lua_setfield(L, -2, "tx_dropped");
lua_pushnumber(L, stats->multicast);
lua_setfield(L, -2, "multicast");
lua_pushnumber(L, stats->collisions);
lua_setfield(L, -2, "collisions");
} else {
lua_newtable(L);
}
lua_setfield(L, -2, "data");
#endif
if (c->ifa_netmask && !nixio__addr_parse(&addr, c->ifa_netmask)) {
lua_pushstring(L, addr.host);
lua_setfield(L, -2, "netmask");
lua_pushinteger(L, nixio__addr_prefix(c->ifa_netmask));
lua_setfield(L, -2, "prefix");
}
if (c->ifa_broadaddr && !nixio__addr_parse(&addr, c->ifa_broadaddr)) {
lua_pushstring(L, addr.host);
lua_setfield(L, -2, "broadaddr");
}
if (c->ifa_dstaddr && !nixio__addr_parse(&addr, c->ifa_dstaddr)) {
lua_pushstring(L, addr.host);
lua_setfield(L, -2, "dstaddr");
}
lua_rawseti(L, -2, i++);
}
freeifaddrs(ifaddr);
return 1;
}
#endif
/* module table */
static const luaL_reg R[] = {
#if defined(__linux__) || defined(BSD)
{"getifaddrs", nixio_getifaddrs},
#endif
{"getaddrinfo", nixio_getaddrinfo},
{"getnameinfo", nixio_getnameinfo},
{NULL, NULL}
};
/* object table */
static const luaL_reg M[] = {
{"getsockname", nixio_sock_getsockname},
{"getpeername", nixio_sock_getpeername},
{NULL, NULL}
};
void nixio_open_address(lua_State *L) {
luaL_register(L, NULL, R);
lua_pushvalue(L, -2);
luaL_register(L, NULL, M);
lua_pop(L, 1);
}