2 * wpa_supplicant/hostapd control interface library
3 * Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
19 #include <sys/types.h>
21 #ifndef CONFIG_NATIVE_WINDOWS
22 #include <sys/socket.h>
23 #include <netinet/in.h>
25 #endif /* CONFIG_NATIVE_WINDOWS */
28 #ifdef CONFIG_NATIVE_WINDOWS
30 #endif /* CONFIG_NATIVE_WINDOWS */
34 * struct wpa_ctrl - Internal structure for control interface library
36 * This structure is used by the wpa_supplicant/hostapd control interface
37 * library to store internal data. Programs using the library should not touch
38 * this data directly. They can only use the pointer to the data structure as
39 * an identifier for the control interface connection and use this as one of
40 * the arguments for most of the control interface library functions.
44 #ifdef CONFIG_CTRL_IFACE_UDP
45 struct sockaddr_in local;
46 struct sockaddr_in dest;
47 #else /* CONFIG_CTRL_IFACE_UDP */
48 struct sockaddr_un local;
49 struct sockaddr_un dest;
50 #endif /* CONFIG_CTRL_IFACE_UDP */
54 struct wpa_ctrl * wpa_ctrl_open(const char *ctrl_path)
56 struct wpa_ctrl *ctrl;
57 #ifndef CONFIG_CTRL_IFACE_UDP
58 static int counter = 0;
59 #endif /* CONFIG_CTRL_IFACE_UDP */
61 ctrl = malloc(sizeof(*ctrl));
64 memset(ctrl, 0, sizeof(*ctrl));
66 #ifdef CONFIG_CTRL_IFACE_UDP
67 ctrl->s = socket(PF_INET, SOCK_DGRAM, 0);
74 ctrl->local.sin_family = AF_INET;
75 ctrl->local.sin_addr.s_addr = htonl((127 << 24) | 1);
76 if (bind(ctrl->s, (struct sockaddr *) &ctrl->local,
77 sizeof(ctrl->local)) < 0) {
83 ctrl->dest.sin_family = AF_INET;
84 ctrl->dest.sin_addr.s_addr = htonl((127 << 24) | 1);
85 ctrl->dest.sin_port = htons(WPA_CTRL_IFACE_PORT);
86 if (connect(ctrl->s, (struct sockaddr *) &ctrl->dest,
87 sizeof(ctrl->dest)) < 0) {
93 #else /* CONFIG_CTRL_IFACE_UDP */
94 ctrl->s = socket(PF_UNIX, SOCK_DGRAM, 0);
100 ctrl->local.sun_family = AF_UNIX;
101 snprintf(ctrl->local.sun_path, sizeof(ctrl->local.sun_path),
102 "/tmp/wpa_ctrl_%d-%d", getpid(), counter++);
103 if (bind(ctrl->s, (struct sockaddr *) &ctrl->local,
104 sizeof(ctrl->local)) < 0) {
110 ctrl->dest.sun_family = AF_UNIX;
111 snprintf(ctrl->dest.sun_path, sizeof(ctrl->dest.sun_path), "%s",
113 if (connect(ctrl->s, (struct sockaddr *) &ctrl->dest,
114 sizeof(ctrl->dest)) < 0) {
116 unlink(ctrl->local.sun_path);
120 #endif /* CONFIG_CTRL_IFACE_UDP */
126 void wpa_ctrl_close(struct wpa_ctrl *ctrl)
128 #ifndef CONFIG_CTRL_IFACE_UDP
129 unlink(ctrl->local.sun_path);
130 #endif /* CONFIG_CTRL_IFACE_UDP */
136 int wpa_ctrl_request(struct wpa_ctrl *ctrl, const char *cmd, size_t cmd_len,
137 char *reply, size_t *reply_len,
138 void (*msg_cb)(char *msg, size_t len))
144 if (send(ctrl->s, cmd, cmd_len, 0) < 0)
151 FD_SET(ctrl->s, &rfds);
152 res = select(ctrl->s + 1, &rfds, NULL, NULL, &tv);
153 if (FD_ISSET(ctrl->s, &rfds)) {
154 res = recv(ctrl->s, reply, *reply_len, 0);
157 if (res > 0 && reply[0] == '<') {
158 /* This is an unsolicited message from
159 * wpa_supplicant, not the reply to the
160 * request. Use msg_cb to report this to the
163 /* Make sure the message is nul
165 if ((size_t) res == *reply_len)
166 res = (*reply_len) - 1;
182 static int wpa_ctrl_attach_helper(struct wpa_ctrl *ctrl, int attach)
188 ret = wpa_ctrl_request(ctrl, attach ? "ATTACH" : "DETACH", 6,
192 if (len == 3 && memcmp(buf, "OK\n", 3) == 0)
198 int wpa_ctrl_attach(struct wpa_ctrl *ctrl)
200 return wpa_ctrl_attach_helper(ctrl, 1);
204 int wpa_ctrl_detach(struct wpa_ctrl *ctrl)
206 return wpa_ctrl_attach_helper(ctrl, 0);
210 int wpa_ctrl_recv(struct wpa_ctrl *ctrl, char *reply, size_t *reply_len)
214 res = recv(ctrl->s, reply, *reply_len, 0);
222 int wpa_ctrl_pending(struct wpa_ctrl *ctrl)
230 FD_SET(ctrl->s, &rfds);
231 res = select(ctrl->s + 1, &rfds, NULL, NULL, &tv);
232 return FD_ISSET(ctrl->s, &rfds);
236 int wpa_ctrl_get_fd(struct wpa_ctrl *ctrl)