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authorJanusz Dziedzic <janusz.dziedzic@tieto.com>2016-03-04 09:20:24 (GMT)
committerJouni Malinen <j@w1.fi>2016-03-05 15:44:37 (GMT)
commit56885eecf4026b0199d5ba75bd50395a17d323cc (patch)
tree84f4241f8b6376f13405dbec454aa70640fd76de /hostapd/ctrl_iface.c
parentacf57fae765b7bbabb6dcfa43a54af7f847b76cf (diff)
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hostapd: Add UDP support for ctrl_iface
Add UDP support for ctrl_iface: New config option could be set: CONFIG_CTRL_IFACE=udp CONFIG_CTRL_IFACE=udp-remote CONFIG_CTRL_IFACE=udp6 CONFIG_CTRL_IFACE=udp6-remote And hostapd_cli usage: hostapd_cli -i localhost:8877 Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Diffstat (limited to 'hostapd/ctrl_iface.c')
-rw-r--r--hostapd/ctrl_iface.c258
1 files changed, 251 insertions, 7 deletions
diff --git a/hostapd/ctrl_iface.c b/hostapd/ctrl_iface.c
index ae95fd6..237f02c 100644
--- a/hostapd/ctrl_iface.c
+++ b/hostapd/ctrl_iface.c
@@ -19,6 +19,10 @@
#include <sys/stat.h>
#include <stddef.h>
+#ifdef CONFIG_CTRL_IFACE_UDP
+#include <netdb.h>
+#endif /* CONFIG_CTRL_IFACE_UDP */
+
#include "utils/common.h"
#include "utils/eloop.h"
#include "common/version.h"
@@ -52,6 +56,15 @@
#define HOSTAPD_CLI_DUP_VALUE_MAX_LEN 256
+#ifdef CONFIG_CTRL_IFACE_UDP
+#define COOKIE_LEN 8
+static unsigned char cookie[COOKIE_LEN];
+static unsigned char gcookie[COOKIE_LEN];
+#define HOSTAPD_CTRL_IFACE_PORT 8877
+#define HOSTAPD_CTRL_IFACE_PORT_LIMIT 50
+#define HOSTAPD_GLOBAL_CTRL_IFACE_PORT 8878
+#define HOSTAPD_GLOBAL_CTRL_IFACE_PORT_LIMIT 50
+#endif /* CONFIG_CTRL_IFACE_UDP */
static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
enum wpa_msg_type type,
@@ -2316,10 +2329,13 @@ static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
int res;
struct sockaddr_storage from;
socklen_t fromlen = sizeof(from);
- char *reply;
+ char *reply, *pos = buf;
const int reply_size = 4096;
int reply_len;
int level = MSG_DEBUG;
+#ifdef CONFIG_CTRL_IFACE_UDP
+ unsigned char lcookie[COOKIE_LEN];
+#endif /* CONFIG_CTRL_IFACE_UDP */
res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
(struct sockaddr *) &from, &fromlen);
@@ -2329,9 +2345,6 @@ static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
return;
}
buf[res] = '\0';
- if (os_strcmp(buf, "PING") == 0)
- level = MSG_EXCESSIVE;
- wpa_hexdump_ascii(level, "RX ctrl_iface", (u8 *) buf, res);
reply = os_malloc(reply_size);
if (reply == NULL) {
@@ -2343,10 +2356,46 @@ static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
return;
}
- reply_len = hostapd_ctrl_iface_receive_process(hapd, buf,
+#ifdef CONFIG_CTRL_IFACE_UDP
+ if (os_strcmp(buf, "GET_COOKIE") == 0) {
+ os_memcpy(reply, "COOKIE=", 7);
+ wpa_snprintf_hex(reply + 7, 2 * COOKIE_LEN + 1,
+ cookie, COOKIE_LEN);
+ reply_len = 7 + 2 * COOKIE_LEN;
+ goto done;
+ }
+
+ if (os_strncmp(buf, "COOKIE=", 7) != 0 ||
+ hexstr2bin(buf + 7, lcookie, COOKIE_LEN) < 0) {
+ wpa_printf(MSG_DEBUG,
+ "CTRL: No cookie in the request - drop request");
+ os_free(reply);
+ return;
+ }
+
+ if (os_memcmp(cookie, lcookie, COOKIE_LEN) != 0) {
+ wpa_printf(MSG_DEBUG,
+ "CTRL: Invalid cookie in the request - drop request");
+ os_free(reply);
+ return;
+ }
+
+ pos = buf + 7 + 2 * COOKIE_LEN;
+ while (*pos == ' ')
+ pos++;
+#endif /* CONFIG_CTRL_IFACE_UDP */
+
+ if (os_strcmp(pos, "PING") == 0)
+ level = MSG_EXCESSIVE;
+ wpa_hexdump_ascii(level, "RX ctrl_iface", pos, res);
+
+ reply_len = hostapd_ctrl_iface_receive_process(hapd, pos,
reply, reply_size,
&from, fromlen);
+#ifdef CONFIG_CTRL_IFACE_UDP
+done:
+#endif /* CONFIG_CTRL_IFACE_UDP */
if (sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from,
fromlen) < 0) {
wpa_printf(MSG_DEBUG, "CTRL: sendto failed: %s",
@@ -2356,6 +2405,7 @@ static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
}
+#ifndef CONFIG_CTRL_IFACE_UDP
static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
{
char *buf;
@@ -2375,6 +2425,7 @@ static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
buf[len - 1] = '\0';
return buf;
}
+#endif /* CONFIG_CTRL_IFACE_UDP */
static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
@@ -2390,6 +2441,81 @@ static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
{
+#ifdef CONFIG_CTRL_IFACE_UDP
+ int port = HOSTAPD_CTRL_IFACE_PORT;
+ char p[32] = { 0 };
+ struct addrinfo hints = { 0 }, *res, *saveres;
+ int n;
+
+ if (hapd->ctrl_sock > -1) {
+ wpa_printf(MSG_DEBUG, "ctrl_iface already exists!");
+ return 0;
+ }
+
+ if (hapd->conf->ctrl_interface == NULL)
+ return 0;
+
+ dl_list_init(&hapd->ctrl_dst);
+ hapd->ctrl_sock = -1;
+ os_get_random(cookie, COOKIE_LEN);
+
+#ifdef CONFIG_CTRL_IFACE_UDP_REMOTE
+ hints.ai_flags = AI_PASSIVE;
+#endif /* CONFIG_CTRL_IFACE_UDP_REMOTE */
+
+#ifdef CONFIG_CTRL_IFACE_UDP_IPV6
+ hints.ai_family = AF_INET6;
+#else /* CONFIG_CTRL_IFACE_UDP_IPV6 */
+ hints.ai_family = AF_INET;
+#endif /* CONFIG_CTRL_IFACE_UDP_IPV6 */
+ hints.ai_socktype = SOCK_DGRAM;
+
+try_again:
+ os_snprintf(p, sizeof(p), "%d", port);
+ n = getaddrinfo(NULL, p, &hints, &res);
+ if (n) {
+ wpa_printf(MSG_ERROR, "getaddrinfo(): %s", gai_strerror(n));
+ goto fail;
+ }
+
+ saveres = res;
+ hapd->ctrl_sock = socket(res->ai_family, res->ai_socktype,
+ res->ai_protocol);
+ if (hapd->ctrl_sock < 0) {
+ wpa_printf(MSG_ERROR, "socket(PF_INET): %s", strerror(errno));
+ goto fail;
+ }
+
+ if (bind(hapd->ctrl_sock, res->ai_addr, res->ai_addrlen) < 0) {
+ port--;
+ if ((HOSTAPD_CTRL_IFACE_PORT - port) <
+ HOSTAPD_CTRL_IFACE_PORT_LIMIT)
+ goto try_again;
+ wpa_printf(MSG_ERROR, "bind(AF_INET): %s", strerror(errno));
+ goto fail;
+ }
+
+ freeaddrinfo(saveres);
+
+ wpa_printf(MSG_DEBUG, "ctrl_iface_init UDP port: %d", port);
+
+ if (eloop_register_read_sock(hapd->ctrl_sock,
+ hostapd_ctrl_iface_receive, hapd, NULL) <
+ 0) {
+ hostapd_ctrl_iface_deinit(hapd);
+ return -1;
+ }
+
+ hapd->msg_ctx = hapd;
+ wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
+
+ return 0;
+
+fail:
+ if (hapd->ctrl_sock >= 0)
+ close(hapd->ctrl_sock);
+ return -1;
+#else /* CONFIG_CTRL_IFACE_UDP */
struct sockaddr_un addr;
int s = -1;
char *fname = NULL;
@@ -2540,6 +2666,7 @@ fail:
os_free(fname);
}
return -1;
+#endif /* CONFIG_CTRL_IFACE_UDP */
}
@@ -2548,10 +2675,14 @@ void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
struct wpa_ctrl_dst *dst, *prev;
if (hapd->ctrl_sock > -1) {
+#ifndef CONFIG_CTRL_IFACE_UDP
char *fname;
+#endif /* !CONFIG_CTRL_IFACE_UDP */
+
eloop_unregister_read_sock(hapd->ctrl_sock);
close(hapd->ctrl_sock);
hapd->ctrl_sock = -1;
+#ifndef CONFIG_CTRL_IFACE_UDP
fname = hostapd_ctrl_iface_path(hapd);
if (fname)
unlink(fname);
@@ -2570,6 +2701,7 @@ void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
strerror(errno));
}
}
+#endif /* !CONFIG_CTRL_IFACE_UDP */
}
dl_list_for_each_safe(dst, prev, &hapd->ctrl_dst, struct wpa_ctrl_dst,
@@ -2843,15 +2975,18 @@ static void hostapd_global_ctrl_iface_receive(int sock, void *eloop_ctx,
void *sock_ctx)
{
void *interfaces = eloop_ctx;
- char buf[256];
+ char buffer[256], *buf = buffer;
int res;
struct sockaddr_storage from;
socklen_t fromlen = sizeof(from);
char *reply;
int reply_len;
const int reply_size = 4096;
+#ifdef CONFIG_CTRL_IFACE_UDP
+ unsigned char lcookie[COOKIE_LEN];
+#endif /* CONFIG_CTRL_IFACE_UDP */
- res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
+ res = recvfrom(sock, buffer, sizeof(buffer) - 1, 0,
(struct sockaddr *) &from, &fromlen);
if (res < 0) {
wpa_printf(MSG_ERROR, "recvfrom(ctrl_iface): %s",
@@ -2874,6 +3009,35 @@ static void hostapd_global_ctrl_iface_receive(int sock, void *eloop_ctx,
os_memcpy(reply, "OK\n", 3);
reply_len = 3;
+#ifdef CONFIG_CTRL_IFACE_UDP
+ if (os_strcmp(buf, "GET_COOKIE") == 0) {
+ os_memcpy(reply, "COOKIE=", 7);
+ wpa_snprintf_hex(reply + 7, 2 * COOKIE_LEN + 1,
+ gcookie, COOKIE_LEN);
+ reply_len = 7 + 2 * COOKIE_LEN;
+ goto send_reply;
+ }
+
+ if (os_strncmp(buf, "COOKIE=", 7) != 0 ||
+ hexstr2bin(buf + 7, lcookie, COOKIE_LEN) < 0) {
+ wpa_printf(MSG_DEBUG,
+ "CTRL: No cookie in the request - drop request");
+ os_free(reply);
+ return;
+ }
+
+ if (os_memcmp(gcookie, lcookie, COOKIE_LEN) != 0) {
+ wpa_printf(MSG_DEBUG,
+ "CTRL: Invalid cookie in the request - drop request");
+ os_free(reply);
+ return;
+ }
+
+ buf += 7 + 2 * COOKIE_LEN;
+ while (*buf == ' ')
+ buf++;
+#endif /* CONFIG_CTRL_IFACE_UDP */
+
if (os_strncmp(buf, "IFNAME=", 7) == 0) {
char *pos = os_strchr(buf + 7, ' ');
@@ -2955,6 +3119,7 @@ send_reply:
}
+#ifndef CONFIG_CTRL_IFACE_UDP
static char * hostapd_global_ctrl_iface_path(struct hapd_interfaces *interface)
{
char *buf;
@@ -2974,10 +3139,84 @@ static char * hostapd_global_ctrl_iface_path(struct hapd_interfaces *interface)
buf[len - 1] = '\0';
return buf;
}
+#endif /* CONFIG_CTRL_IFACE_UDP */
int hostapd_global_ctrl_iface_init(struct hapd_interfaces *interface)
{
+#ifdef CONFIG_CTRL_IFACE_UDP
+ int port = HOSTAPD_GLOBAL_CTRL_IFACE_PORT;
+ char p[32] = { 0 };
+ struct addrinfo hints = { 0 }, *res, *saveres;
+ int n;
+
+ if (interface->global_ctrl_sock > -1) {
+ wpa_printf(MSG_DEBUG, "ctrl_iface already exists!");
+ return 0;
+ }
+
+ if (interface->global_iface_path == NULL)
+ return 0;
+
+ dl_list_init(&interface->global_ctrl_dst);
+ interface->global_ctrl_sock = -1;
+ os_get_random(gcookie, COOKIE_LEN);
+
+#ifdef CONFIG_CTRL_IFACE_UDP_REMOTE
+ hints.ai_flags = AI_PASSIVE;
+#endif /* CONFIG_CTRL_IFACE_UDP_REMOTE */
+
+#ifdef CONFIG_CTRL_IFACE_UDP_IPV6
+ hints.ai_family = AF_INET6;
+#else /* CONFIG_CTRL_IFACE_UDP_IPV6 */
+ hints.ai_family = AF_INET;
+#endif /* CONFIG_CTRL_IFACE_UDP_IPV6 */
+ hints.ai_socktype = SOCK_DGRAM;
+
+try_again:
+ os_snprintf(p, sizeof(p), "%d", port);
+ n = getaddrinfo(NULL, p, &hints, &res);
+ if (n) {
+ wpa_printf(MSG_ERROR, "getaddrinfo(): %s", gai_strerror(n));
+ goto fail;
+ }
+
+ saveres = res;
+ interface->global_ctrl_sock = socket(res->ai_family, res->ai_socktype,
+ res->ai_protocol);
+ if (interface->global_ctrl_sock < 0) {
+ wpa_printf(MSG_ERROR, "socket(PF_INET): %s", strerror(errno));
+ goto fail;
+ }
+
+ if (bind(interface->global_ctrl_sock, res->ai_addr, res->ai_addrlen) <
+ 0) {
+ port++;
+ if ((port - HOSTAPD_GLOBAL_CTRL_IFACE_PORT) <
+ HOSTAPD_GLOBAL_CTRL_IFACE_PORT_LIMIT)
+ goto try_again;
+ wpa_printf(MSG_ERROR, "bind(AF_INET): %s", strerror(errno));
+ goto fail;
+ }
+
+ freeaddrinfo(saveres);
+
+ wpa_printf(MSG_DEBUG, "global ctrl_iface_init UDP port: %d", port);
+
+ if (eloop_register_read_sock(interface->global_ctrl_sock,
+ hostapd_global_ctrl_iface_receive,
+ interface, NULL) < 0) {
+ hostapd_global_ctrl_iface_deinit(interface);
+ return -1;
+ }
+
+ return 0;
+
+fail:
+ if (interface->global_ctrl_sock >= 0)
+ close(interface->global_ctrl_sock);
+ return -1;
+#else /* CONFIG_CTRL_IFACE_UDP */
struct sockaddr_un addr;
int s = -1;
char *fname = NULL;
@@ -3083,18 +3322,22 @@ fail:
os_free(fname);
}
return -1;
+#endif /* CONFIG_CTRL_IFACE_UDP */
}
void hostapd_global_ctrl_iface_deinit(struct hapd_interfaces *interfaces)
{
+#ifndef CONFIG_CTRL_IFACE_UDP
char *fname = NULL;
+#endif /* CONFIG_CTRL_IFACE_UDP */
struct wpa_ctrl_dst *dst, *prev;
if (interfaces->global_ctrl_sock > -1) {
eloop_unregister_read_sock(interfaces->global_ctrl_sock);
close(interfaces->global_ctrl_sock);
interfaces->global_ctrl_sock = -1;
+#ifndef CONFIG_CTRL_IFACE_UDP
fname = hostapd_global_ctrl_iface_path(interfaces);
if (fname) {
unlink(fname);
@@ -3114,6 +3357,7 @@ void hostapd_global_ctrl_iface_deinit(struct hapd_interfaces *interfaces)
strerror(errno));
}
}
+#endif /* CONFIG_CTRL_IFACE_UDP */
}
os_free(interfaces->global_iface_path);