2 * nixio - Linux I/O library for lua
4 * Copyright (C) 2009 Steven Barth <steven@midlink.org>
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
20 #include <sys/types.h>
21 #include <sys/param.h>
31 /* setjmp() / longjmp() stuff */
32 static jmp_buf nixio__jump_alarm
;
33 static void nixio__handle_alarm(int sig
) { longjmp(nixio__jump_alarm
, 1); }
35 #include <linux/netdevice.h>
37 /* struct net_device_stats is buggy on amd64, redefine it */
50 uint32_t rx_length_errors
;
51 uint32_t rx_over_errors
;
52 uint32_t rx_crc_errors
;
53 uint32_t rx_frame_errors
;
54 uint32_t rx_fifo_errors
;
55 uint32_t rx_missed_errors
;
57 uint32_t tx_aborted_errors
;
58 uint32_t tx_carrier_errors
;
59 uint32_t tx_fifo_errors
;
60 uint32_t tx_heartbeat_errors
;
61 uint32_t tx_window_errors
;
63 uint32_t rx_compressed
;
64 uint32_t tx_compressed
;
69 #define NI_MAXHOST 1025
73 * address pushing helper
75 int nixio__addr_parse(nixio_addr
*addr
, struct sockaddr
*saddr
) {
78 addr
->family
= saddr
->sa_family
;
79 if (saddr
->sa_family
== AF_INET
) {
80 struct sockaddr_in
*inetaddr
= (struct sockaddr_in
*)saddr
;
81 addr
->port
= ntohs(inetaddr
->sin_port
);
82 baddr
= &inetaddr
->sin_addr
;
83 } else if (saddr
->sa_family
== AF_INET6
) {
84 struct sockaddr_in6
*inet6addr
= (struct sockaddr_in6
*)saddr
;
85 addr
->port
= ntohs(inet6addr
->sin6_port
);
86 baddr
= &inet6addr
->sin6_addr
;
88 } else if (saddr
->sa_family
== AF_PACKET
) {
89 struct sockaddr_ll
*etheradddr
= (struct sockaddr_ll
*)saddr
;
90 addr
->prefix
= etheradddr
->sll_hatype
;
91 addr
->port
= etheradddr
->sll_ifindex
;
93 for (size_t i
= 0; i
< etheradddr
->sll_halen
; i
++) {
94 *c
++ = nixio__bin2hex
[(etheradddr
->sll_addr
[i
] & 0xf0) >> 4];
95 *c
++ = nixio__bin2hex
[(etheradddr
->sll_addr
[i
] & 0x0f)];
102 errno
= EAFNOSUPPORT
;
106 if (!inet_ntop(saddr
->sa_family
, baddr
, addr
->host
, sizeof(addr
->host
))) {
114 * address pulling helper
116 int nixio__addr_write(nixio_addr
*addr
, struct sockaddr
*saddr
) {
117 if (addr
->family
== AF_UNSPEC
) {
118 if (strchr(addr
->host
, ':')) {
119 addr
->family
= AF_INET6
;
121 addr
->family
= AF_INET
;
124 if (addr
->family
== AF_INET
) {
125 struct sockaddr_in
*inetaddr
= (struct sockaddr_in
*)saddr
;
126 memset(inetaddr
, 0, sizeof(struct sockaddr_in
));
128 if (inet_pton(AF_INET
, addr
->host
, &inetaddr
->sin_addr
) < 1) {
132 inetaddr
->sin_family
= AF_INET
;
133 inetaddr
->sin_port
= htons((uint16_t)addr
->port
);
135 } else if (addr
->family
== AF_INET6
) {
136 struct sockaddr_in6
*inet6addr
= (struct sockaddr_in6
*)saddr
;
137 memset(inet6addr
, 0, sizeof(struct sockaddr_in6
));
139 if (inet_pton(AF_INET6
, addr
->host
, &inet6addr
->sin6_addr
) < 1) {
143 inet6addr
->sin6_family
= AF_INET6
;
144 inet6addr
->sin6_port
= htons((uint16_t)addr
->port
);
147 errno
= EAFNOSUPPORT
;
153 * netmask to prefix helper
155 int nixio__addr_prefix(struct sockaddr
*saddr
) {
160 if (saddr
->sa_family
== AF_INET
) {
161 addr
= (uint8_t*)(&((struct sockaddr_in
*)saddr
)->sin_addr
);
163 } else if (saddr
->sa_family
== AF_INET6
) {
164 addr
= (uint8_t*)(&((struct sockaddr_in6
*)saddr
)->sin6_addr
);
167 errno
= EAFNOSUPPORT
;
171 for (size_t i
= 0; i
< len
; i
++) {
172 if (addr
[i
] == 0xff) {
174 } else if (addr
[i
] == 0x00) {
177 for (uint8_t c
= addr
[i
]; c
; c
<<= 1) {
187 * getaddrinfo(host, family, port)
189 static int nixio_getaddrinfo(lua_State
*L
) {
190 const char *host
= NULL
;
191 if (!lua_isnoneornil(L
, 1)) {
192 host
= luaL_checklstring(L
, 1, NULL
);
194 const char *family
= luaL_optlstring(L
, 2, "any", NULL
);
195 const char *port
= lua_tolstring(L
, 3, NULL
);
197 struct addrinfo hints
, *result
, *rp
;
198 memset(&hints
, 0, sizeof(hints
));
200 if (!strcmp(family
, "any")) {
201 hints
.ai_family
= AF_UNSPEC
;
202 } else if (!strcmp(family
, "inet")) {
203 hints
.ai_family
= AF_INET
;
204 } else if (!strcmp(family
, "inet6")) {
205 hints
.ai_family
= AF_INET6
;
207 return luaL_argerror(L
, 2, "supported values: any, inet, inet6");
210 hints
.ai_socktype
= 0;
211 hints
.ai_protocol
= 0;
213 int aistat
= getaddrinfo(host
, port
, &hints
, &result
);
216 lua_pushinteger(L
, aistat
);
217 lua_pushstring(L
, gai_strerror(aistat
));
221 /* create socket object */
225 for (rp
= result
; rp
!= NULL
; rp
= rp
->ai_next
) {
226 /* avoid duplicate results */
228 if (!port
&& rp
->ai_socktype
!= SOCK_STREAM
) {
233 if (rp
->ai_family
== AF_INET
|| rp
->ai_family
== AF_INET6
) {
234 lua_createtable(L
, 0, port
? 4 : 2);
235 if (rp
->ai_family
== AF_INET
) {
236 lua_pushliteral(L
, "inet");
237 } else if (rp
->ai_family
== AF_INET6
) {
238 lua_pushliteral(L
, "inet6");
240 lua_setfield(L
, -2, "family");
243 switch (rp
->ai_socktype
) {
245 lua_pushliteral(L
, "stream");
248 lua_pushliteral(L
, "dgram");
251 lua_pushliteral(L
, "raw");
257 lua_setfield(L
, -2, "socktype");
261 if (nixio__addr_parse(&addr
, rp
->ai_addr
)) {
262 freeaddrinfo(result
);
263 return nixio__perror_s(L
);
267 lua_pushinteger(L
, addr
.port
);
268 lua_setfield(L
, -2, "port");
271 lua_pushstring(L
, addr
.host
);
272 lua_setfield(L
, -2, "address");
273 lua_rawseti(L
, -2, i
++);
277 freeaddrinfo(result
);
283 * getnameinfo(address, family[, timeout])
285 static int nixio_getnameinfo(lua_State
*L
) {
286 const char *ip
= luaL_checkstring(L
, 1);
287 const char *family
= luaL_optstring(L
, 2, NULL
);
290 struct sigaction sa_new
, sa_old
;
291 int timeout
= luaL_optnumber(L
, 3, 0);
292 if (timeout
> 0 && timeout
< 1000)
294 sa_new
.sa_handler
= nixio__handle_alarm
;
296 sigemptyset(&sa_new
.sa_mask
);
297 sigaction(SIGALRM
, &sa_new
, &sa_old
);
299 /* user timeout exceeded */
300 if (setjmp(nixio__jump_alarm
))
302 sigaction(SIGALRM
, &sa_old
, NULL
);
305 lua_pushinteger(L
, EAI_AGAIN
);
306 lua_pushstring(L
, gai_strerror(EAI_AGAIN
));
311 ualarm(timeout
* 1000, 0);
315 char host
[NI_MAXHOST
];
317 struct sockaddr_storage saddr
;
319 memset(&addr
, 0, sizeof(addr
));
320 strncpy(addr
.host
, ip
, sizeof(addr
.host
) - 1);
323 addr
.family
= AF_UNSPEC
;
324 } else if (!strcmp(family
, "inet")) {
325 addr
.family
= AF_INET
;
326 } else if (!strcmp(family
, "inet6")) {
327 addr
.family
= AF_INET6
;
329 return luaL_argerror(L
, 2, "supported values: inet, inet6");
332 nixio__addr_write(&addr
, (struct sockaddr
*)&saddr
);
334 int res
= getnameinfo((struct sockaddr
*)&saddr
,
335 (saddr
.ss_family
== AF_INET
)
336 ? sizeof(struct sockaddr_in
) : sizeof(struct sockaddr_in6
),
337 host
, sizeof(host
), NULL
, 0, NI_NAMEREQD
);
340 if (timeout
> 0 && timeout
< 1000)
343 sigaction(SIGALRM
, &sa_old
, NULL
);
349 lua_pushinteger(L
, res
);
350 lua_pushstring(L
, gai_strerror(res
));
353 lua_pushstring(L
, host
);
361 static int nixio_sock_getsockname(lua_State
*L
) {
362 int sockfd
= nixio__checksockfd(L
);
363 struct sockaddr_storage saddr
;
364 socklen_t addrlen
= sizeof(saddr
);
367 if (getsockname(sockfd
, (struct sockaddr
*)&saddr
, &addrlen
) ||
368 nixio__addr_parse(&addr
, (struct sockaddr
*)&saddr
)) {
369 return nixio__perror_s(L
);
372 lua_pushstring(L
, addr
.host
);
373 lua_pushinteger(L
, addr
.port
);
380 static int nixio_sock_getpeername(lua_State
*L
) {
381 int sockfd
= nixio__checksockfd(L
);
382 struct sockaddr_storage saddr
;
383 socklen_t addrlen
= sizeof(saddr
);
386 if (getpeername(sockfd
, (struct sockaddr
*)&saddr
, &addrlen
) ||
387 nixio__addr_parse(&addr
, (struct sockaddr
*)&saddr
)) {
388 return nixio__perror_s(L
);
391 lua_pushstring(L
, addr
.host
);
392 lua_pushinteger(L
, addr
.port
);
396 #if defined(__linux__) || defined(BSD)
402 static int nixio_getifaddrs(lua_State
*L
) {
404 struct ifaddrs
*ifaddr
, *c
;
405 if (getifaddrs(&ifaddr
) == -1) {
406 return nixio__perror(L
);
412 for (c
= ifaddr
; c
; c
= c
->ifa_next
) {
415 lua_pushstring(L
, c
->ifa_name
);
416 lua_setfield(L
, -2, "name");
418 lua_createtable(L
, 0, 7);
419 lua_pushboolean(L
, c
->ifa_flags
& IFF_UP
);
420 lua_setfield(L
, -2, "up");
422 lua_pushboolean(L
, c
->ifa_flags
& IFF_BROADCAST
);
423 lua_setfield(L
, -2, "broadcast");
425 lua_pushboolean(L
, c
->ifa_flags
& IFF_LOOPBACK
);
426 lua_setfield(L
, -2, "loopback");
428 lua_pushboolean(L
, c
->ifa_flags
& IFF_POINTOPOINT
);
429 lua_setfield(L
, -2, "pointtopoint");
431 lua_pushboolean(L
, c
->ifa_flags
& IFF_NOARP
);
432 lua_setfield(L
, -2, "noarp");
434 lua_pushboolean(L
, c
->ifa_flags
& IFF_PROMISC
);
435 lua_setfield(L
, -2, "promisc");
437 lua_pushboolean(L
, c
->ifa_flags
& IFF_MULTICAST
);
438 lua_setfield(L
, -2, "multicast");
439 lua_setfield(L
, -2, "flags");
442 if (!nixio__addr_parse(&addr
, c
->ifa_addr
)) {
443 lua_pushstring(L
, addr
.host
);
444 lua_setfield(L
, -2, "addr");
447 if (c
->ifa_addr
->sa_family
== AF_INET
) {
448 lua_pushliteral(L
, "inet");
449 } else if (c
->ifa_addr
->sa_family
== AF_INET6
) {
450 lua_pushliteral(L
, "inet6");
452 } else if (c
->ifa_addr
->sa_family
== AF_PACKET
) {
453 lua_pushliteral(L
, "packet");
456 lua_pushliteral(L
, "unknown");
458 lua_setfield(L
, -2, "family");
461 if (c
->ifa_addr
->sa_family
== AF_PACKET
) {
462 lua_pushinteger(L
, addr
.port
);
463 lua_setfield(L
, -2, "ifindex");
465 lua_pushinteger(L
, addr
.prefix
);
466 lua_setfield(L
, -2, "hatype");
472 if (c
->ifa_data
&& (!c
->ifa_addr
473 || c
->ifa_addr
->sa_family
== AF_PACKET
)) {
475 lua_pushliteral(L
, "packet");
476 lua_setfield(L
, -2, "family");
479 lua_createtable(L
, 0, 10);
480 struct nixio__nds
*stats
= c
->ifa_data
;
482 lua_pushnumber(L
, stats
->rx_packets
);
483 lua_setfield(L
, -2, "rx_packets");
485 lua_pushnumber(L
, stats
->tx_packets
);
486 lua_setfield(L
, -2, "tx_packets");
488 lua_pushnumber(L
, stats
->rx_bytes
);
489 lua_setfield(L
, -2, "rx_bytes");
491 lua_pushnumber(L
, stats
->tx_bytes
);
492 lua_setfield(L
, -2, "tx_bytes");
494 lua_pushnumber(L
, stats
->rx_errors
);
495 lua_setfield(L
, -2, "rx_errors");
497 lua_pushnumber(L
, stats
->tx_errors
);
498 lua_setfield(L
, -2, "tx_errors");
500 lua_pushnumber(L
, stats
->rx_dropped
);
501 lua_setfield(L
, -2, "rx_dropped");
503 lua_pushnumber(L
, stats
->tx_dropped
);
504 lua_setfield(L
, -2, "tx_dropped");
506 lua_pushnumber(L
, stats
->multicast
);
507 lua_setfield(L
, -2, "multicast");
509 lua_pushnumber(L
, stats
->collisions
);
510 lua_setfield(L
, -2, "collisions");
514 lua_setfield(L
, -2, "data");
517 if (c
->ifa_netmask
&& !nixio__addr_parse(&addr
, c
->ifa_netmask
)) {
518 lua_pushstring(L
, addr
.host
);
519 lua_setfield(L
, -2, "netmask");
521 lua_pushinteger(L
, nixio__addr_prefix(c
->ifa_netmask
));
522 lua_setfield(L
, -2, "prefix");
525 if (c
->ifa_broadaddr
&& !nixio__addr_parse(&addr
, c
->ifa_broadaddr
)) {
526 lua_pushstring(L
, addr
.host
);
527 lua_setfield(L
, -2, "broadaddr");
530 if (c
->ifa_dstaddr
&& !nixio__addr_parse(&addr
, c
->ifa_dstaddr
)) {
531 lua_pushstring(L
, addr
.host
);
532 lua_setfield(L
, -2, "dstaddr");
535 lua_rawseti(L
, -2, i
++);
545 static const luaL_reg R
[] = {
546 #if defined(__linux__) || defined(BSD)
547 {"getifaddrs", nixio_getifaddrs
},
549 {"getaddrinfo", nixio_getaddrinfo
},
550 {"getnameinfo", nixio_getnameinfo
},
555 static const luaL_reg M
[] = {
556 {"getsockname", nixio_sock_getsockname
},
557 {"getpeername", nixio_sock_getpeername
},
561 void nixio_open_address(lua_State
*L
) {
562 luaL_register(L
, NULL
, R
);
564 lua_pushvalue(L
, -2);
565 luaL_register(L
, NULL
, M
);