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authorJouni Malinen <j@w1.fi>2008-02-28 01:34:43 (GMT)
committerJouni Malinen <jm@jm.kir.nu>2008-02-28 01:34:43 (GMT)
commit6fc6879bd55a394f807cbbe927df736c190cb8ab (patch)
treecdf50da0c58f21510a808d53502a060d911ff243 /wpa_supplicant/ctrl_iface_named_pipe.c
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Re-initialize hostapd/wpa_supplicant git repository based on 0.6.3 release
Diffstat (limited to 'wpa_supplicant/ctrl_iface_named_pipe.c')
-rw-r--r--wpa_supplicant/ctrl_iface_named_pipe.c834
1 files changed, 834 insertions, 0 deletions
diff --git a/wpa_supplicant/ctrl_iface_named_pipe.c b/wpa_supplicant/ctrl_iface_named_pipe.c
new file mode 100644
index 0000000..af451eb
--- /dev/null
+++ b/wpa_supplicant/ctrl_iface_named_pipe.c
@@ -0,0 +1,834 @@
+/*
+ * WPA Supplicant / Windows Named Pipe -based control interface
+ * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "eloop.h"
+#include "config.h"
+#include "eapol_supp/eapol_supp_sm.h"
+#include "wpa_supplicant_i.h"
+#include "ctrl_iface.h"
+#include "wpa_ctrl.h"
+
+#ifdef __MINGW32_VERSION
+/* mingw-w32api v3.1 does not yet include sddl.h, so define needed parts here
+ */
+#define SDDL_REVISION_1 1
+BOOL WINAPI ConvertStringSecurityDescriptorToSecurityDescriptorA(
+ LPCSTR, DWORD, PSECURITY_DESCRIPTOR *, PULONG);
+BOOL WINAPI ConvertStringSecurityDescriptorToSecurityDescriptorW(
+ LPCWSTR, DWORD, PSECURITY_DESCRIPTOR *, PULONG);
+#ifdef UNICODE
+#define ConvertStringSecurityDescriptorToSecurityDescriptor \
+ConvertStringSecurityDescriptorToSecurityDescriptorW
+#else
+#define ConvertStringSecurityDescriptorToSecurityDescriptor \
+ConvertStringSecurityDescriptorToSecurityDescriptorA
+#endif
+#else /* __MINGW32_VERSION */
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x0500
+#endif
+#include <sddl.h>
+#endif /* __MINGW32_VERSION */
+
+#ifndef WPA_SUPPLICANT_NAMED_PIPE
+#define WPA_SUPPLICANT_NAMED_PIPE "WpaSupplicant"
+#endif
+#define NAMED_PIPE_PREFIX TEXT("\\\\.\\pipe\\") TEXT(WPA_SUPPLICANT_NAMED_PIPE)
+
+/* Per-interface ctrl_iface */
+
+#define REQUEST_BUFSIZE 256
+#define REPLY_BUFSIZE 4096
+
+struct ctrl_iface_priv;
+
+/**
+ * struct wpa_ctrl_dst - Internal data structure of control interface clients
+ *
+ * This structure is used to store information about registered control
+ * interface monitors into struct wpa_supplicant. This data is private to
+ * ctrl_iface_named_pipe.c and should not be touched directly from other files.
+ */
+struct wpa_ctrl_dst {
+ /* Note: OVERLAPPED must be the first member of struct wpa_ctrl_dst */
+ OVERLAPPED overlap;
+ struct wpa_ctrl_dst *next, *prev;
+ struct ctrl_iface_priv *priv;
+ HANDLE pipe;
+ int attached;
+ int debug_level;
+ int errors;
+ char req_buf[REQUEST_BUFSIZE];
+ char *rsp_buf;
+ int used;
+};
+
+
+struct ctrl_iface_priv {
+ struct wpa_supplicant *wpa_s;
+ struct wpa_ctrl_dst *ctrl_dst;
+ SECURITY_ATTRIBUTES attr;
+ int sec_attr_set;
+};
+
+
+static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
+ int level, const char *buf,
+ size_t len);
+
+static void ctrl_close_pipe(struct wpa_ctrl_dst *dst);
+static void wpa_supplicant_ctrl_iface_receive(void *, void *);
+static VOID WINAPI ctrl_iface_read_completed(DWORD err, DWORD bytes,
+ LPOVERLAPPED overlap);
+
+struct wpa_global_dst;
+static void global_close_pipe(struct wpa_global_dst *dst);
+static void wpa_supplicant_global_iface_receive(void *eloop_data,
+ void *user_ctx);
+static VOID WINAPI global_iface_read_completed(DWORD err, DWORD bytes,
+ LPOVERLAPPED overlap);
+
+
+static int ctrl_broken_pipe(HANDLE pipe, int used)
+{
+ DWORD err;
+
+ if (PeekNamedPipe(pipe, NULL, 0, NULL, NULL, NULL))
+ return 0;
+
+ err = GetLastError();
+ if (err == ERROR_BROKEN_PIPE || (err == ERROR_BAD_PIPE && used))
+ return 1;
+ return 0;
+}
+
+
+static void ctrl_flush_broken_pipes(struct ctrl_iface_priv *priv)
+{
+ struct wpa_ctrl_dst *dst, *next;
+
+ dst = priv->ctrl_dst;
+
+ while (dst) {
+ next = dst->next;
+ if (ctrl_broken_pipe(dst->pipe, dst->used)) {
+ wpa_printf(MSG_DEBUG, "CTRL: closing broken pipe %p",
+ dst);
+ ctrl_close_pipe(dst);
+ }
+ dst = next;
+ }
+}
+
+
+static int ctrl_open_pipe(struct ctrl_iface_priv *priv)
+{
+ struct wpa_ctrl_dst *dst;
+ DWORD err;
+ TCHAR name[256];
+
+ dst = os_zalloc(sizeof(*dst));
+ if (dst == NULL)
+ return -1;
+ wpa_printf(MSG_DEBUG, "CTRL: Open pipe %p", dst);
+
+ dst->priv = priv;
+ dst->debug_level = MSG_INFO;
+ dst->pipe = INVALID_HANDLE_VALUE;
+
+ dst->overlap.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
+ if (dst->overlap.hEvent == NULL) {
+ wpa_printf(MSG_ERROR, "CTRL: CreateEvent failed: %d",
+ (int) GetLastError());
+ goto fail;
+ }
+
+ eloop_register_event(dst->overlap.hEvent,
+ sizeof(dst->overlap.hEvent),
+ wpa_supplicant_ctrl_iface_receive, dst, NULL);
+
+#ifdef UNICODE
+ _snwprintf(name, 256, NAMED_PIPE_PREFIX TEXT("-%S"),
+ priv->wpa_s->ifname);
+#else /* UNICODE */
+ os_snprintf(name, 256, NAMED_PIPE_PREFIX "-%s",
+ priv->wpa_s->ifname);
+#endif /* UNICODE */
+
+ /* TODO: add support for configuring access list for the pipe */
+ dst->pipe = CreateNamedPipe(name,
+ PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
+ PIPE_TYPE_MESSAGE |
+ PIPE_READMODE_MESSAGE |
+ PIPE_WAIT,
+ 15, REPLY_BUFSIZE, REQUEST_BUFSIZE,
+ 1000,
+ priv->sec_attr_set ? &priv->attr : NULL);
+ if (dst->pipe == INVALID_HANDLE_VALUE) {
+ wpa_printf(MSG_ERROR, "CTRL: CreateNamedPipe failed: %d",
+ (int) GetLastError());
+ goto fail;
+ }
+
+ if (ConnectNamedPipe(dst->pipe, &dst->overlap)) {
+ wpa_printf(MSG_ERROR, "CTRL: ConnectNamedPipe failed: %d",
+ (int) GetLastError());
+ CloseHandle(dst->pipe);
+ os_free(dst);
+ return -1;
+ }
+
+ err = GetLastError();
+ switch (err) {
+ case ERROR_IO_PENDING:
+ wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: connection in "
+ "progress");
+ break;
+ case ERROR_PIPE_CONNECTED:
+ wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: already "
+ "connected");
+ if (SetEvent(dst->overlap.hEvent))
+ break;
+ /* fall through */
+ default:
+ wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe error: %d",
+ (int) err);
+ CloseHandle(dst->pipe);
+ os_free(dst);
+ return -1;
+ }
+
+ dst->next = priv->ctrl_dst;
+ if (dst->next)
+ dst->next->prev = dst;
+ priv->ctrl_dst = dst;
+
+ return 0;
+
+fail:
+ ctrl_close_pipe(dst);
+ return -1;
+}
+
+
+static void ctrl_close_pipe(struct wpa_ctrl_dst *dst)
+{
+ wpa_printf(MSG_DEBUG, "CTRL: close pipe %p", dst);
+
+ if (dst->overlap.hEvent) {
+ eloop_unregister_event(dst->overlap.hEvent,
+ sizeof(dst->overlap.hEvent));
+ CloseHandle(dst->overlap.hEvent);
+ }
+
+ if (dst->pipe != INVALID_HANDLE_VALUE) {
+ /*
+ * Could use FlushFileBuffers() here to guarantee that all data
+ * gets delivered to the client, but that can block, so let's
+ * not do this for now.
+ * FlushFileBuffers(dst->pipe);
+ */
+ CloseHandle(dst->pipe);
+ }
+
+ if (dst->prev)
+ dst->prev->next = dst->next;
+ else
+ dst->priv->ctrl_dst = dst->next;
+ if (dst->next)
+ dst->next->prev = dst->prev;
+
+ os_free(dst->rsp_buf);
+ os_free(dst);
+}
+
+
+static VOID WINAPI ctrl_iface_write_completed(DWORD err, DWORD bytes,
+ LPOVERLAPPED overlap)
+{
+ struct wpa_ctrl_dst *dst = (struct wpa_ctrl_dst *) overlap;
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped write completed: dst=%p "
+ "err=%d bytes=%d", dst, (int) err, (int) bytes);
+ if (err) {
+ ctrl_close_pipe(dst);
+ return;
+ }
+
+ os_free(dst->rsp_buf);
+ dst->rsp_buf = NULL;
+
+ if (!ReadFileEx(dst->pipe, dst->req_buf, sizeof(dst->req_buf),
+ &dst->overlap, ctrl_iface_read_completed)) {
+ wpa_printf(MSG_DEBUG, "CTRL: ReadFileEx failed: %d",
+ (int) GetLastError());
+ ctrl_close_pipe(dst);
+ return;
+ }
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped read started for %p", dst);
+}
+
+
+static void wpa_supplicant_ctrl_iface_rx(struct wpa_ctrl_dst *dst, size_t len)
+{
+ struct wpa_supplicant *wpa_s = dst->priv->wpa_s;
+ char *reply = NULL, *send_buf;
+ size_t reply_len = 0, send_len;
+ int new_attached = 0;
+ char *buf = dst->req_buf;
+
+ dst->used = 1;
+ if (len >= REQUEST_BUFSIZE)
+ len = REQUEST_BUFSIZE - 1;
+ buf[len] = '\0';
+
+ if (os_strcmp(buf, "ATTACH") == 0) {
+ dst->attached = 1;
+ wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor attached");
+ new_attached = 1;
+ reply_len = 2;
+ } else if (os_strcmp(buf, "DETACH") == 0) {
+ dst->attached = 0;
+ wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor detached");
+ reply_len = 2;
+ } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
+ wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", buf + 6);
+ dst->debug_level = atoi(buf + 6);
+ reply_len = 2;
+ } else {
+ reply = wpa_supplicant_ctrl_iface_process(wpa_s, buf,
+ &reply_len);
+ }
+
+ if (reply) {
+ send_buf = reply;
+ send_len = reply_len;
+ } else if (reply_len == 2) {
+ send_buf = "OK\n";
+ send_len = 3;
+ } else {
+ send_buf = "FAIL\n";
+ send_len = 5;
+ }
+
+ os_free(dst->rsp_buf);
+ dst->rsp_buf = os_malloc(send_len);
+ if (dst->rsp_buf == NULL) {
+ ctrl_close_pipe(dst);
+ os_free(reply);
+ return;
+ }
+ os_memcpy(dst->rsp_buf, send_buf, send_len);
+ os_free(reply);
+
+ if (!WriteFileEx(dst->pipe, dst->rsp_buf, send_len, &dst->overlap,
+ ctrl_iface_write_completed)) {
+ wpa_printf(MSG_DEBUG, "CTRL: WriteFileEx failed: %d",
+ (int) GetLastError());
+ ctrl_close_pipe(dst);
+ } else {
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped write started for %p",
+ dst);
+ }
+
+ if (new_attached)
+ eapol_sm_notify_ctrl_attached(wpa_s->eapol);
+}
+
+
+static VOID WINAPI ctrl_iface_read_completed(DWORD err, DWORD bytes,
+ LPOVERLAPPED overlap)
+{
+ struct wpa_ctrl_dst *dst = (struct wpa_ctrl_dst *) overlap;
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped read completed: dst=%p err=%d "
+ "bytes=%d", dst, (int) err, (int) bytes);
+ if (err == 0 && bytes > 0)
+ wpa_supplicant_ctrl_iface_rx(dst, bytes);
+}
+
+
+static void wpa_supplicant_ctrl_iface_receive(void *eloop_data, void *user_ctx)
+{
+ struct wpa_ctrl_dst *dst = eloop_data;
+ struct ctrl_iface_priv *priv = dst->priv;
+ DWORD bytes;
+
+ wpa_printf(MSG_DEBUG, "CTRL: wpa_supplicant_ctrl_iface_receive");
+ ResetEvent(dst->overlap.hEvent);
+
+ if (!GetOverlappedResult(dst->pipe, &dst->overlap, &bytes, FALSE)) {
+ wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult failed: %d",
+ (int) GetLastError());
+ return;
+ }
+ wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult: New client "
+ "connected");
+
+ /* Open a new named pipe for the next client. */
+ ctrl_open_pipe(priv);
+
+ /* Use write completion function to start reading a command */
+ ctrl_iface_write_completed(0, 0, &dst->overlap);
+
+ ctrl_flush_broken_pipes(priv);
+}
+
+
+static int ctrl_iface_parse(struct ctrl_iface_priv *priv, const char *params)
+{
+ const char *sddl = NULL;
+ TCHAR *t_sddl;
+
+ if (os_strncmp(params, "SDDL=", 5) == 0)
+ sddl = params + 5;
+ if (!sddl) {
+ sddl = os_strstr(params, " SDDL=");
+ if (sddl)
+ sddl += 6;
+ }
+
+ if (!sddl)
+ return 0;
+
+ wpa_printf(MSG_DEBUG, "CTRL: SDDL='%s'", sddl);
+ os_memset(&priv->attr, 0, sizeof(priv->attr));
+ priv->attr.nLength = sizeof(priv->attr);
+ priv->attr.bInheritHandle = FALSE;
+ t_sddl = wpa_strdup_tchar(sddl);
+ if (t_sddl == NULL)
+ return -1;
+ if (!ConvertStringSecurityDescriptorToSecurityDescriptor(
+ t_sddl, SDDL_REVISION_1,
+ (PSECURITY_DESCRIPTOR *) &priv->attr.lpSecurityDescriptor,
+ NULL)) {
+ os_free(t_sddl);
+ wpa_printf(MSG_ERROR, "CTRL: SDDL='%s' - could not convert to "
+ "security descriptor: %d",
+ sddl, (int) GetLastError());
+ return -1;
+ }
+ os_free(t_sddl);
+
+ priv->sec_attr_set = 1;
+
+ return 0;
+}
+
+
+static void wpa_supplicant_ctrl_iface_msg_cb(void *ctx, int level,
+ const char *txt, size_t len)
+{
+ struct wpa_supplicant *wpa_s = ctx;
+ if (wpa_s == NULL || wpa_s->ctrl_iface == NULL)
+ return;
+ wpa_supplicant_ctrl_iface_send(wpa_s->ctrl_iface, level, txt, len);
+}
+
+
+struct ctrl_iface_priv *
+wpa_supplicant_ctrl_iface_init(struct wpa_supplicant *wpa_s)
+{
+ struct ctrl_iface_priv *priv;
+
+ priv = os_zalloc(sizeof(*priv));
+ if (priv == NULL)
+ return NULL;
+ priv->wpa_s = wpa_s;
+
+ if (wpa_s->conf->ctrl_interface == NULL)
+ return priv;
+
+ if (ctrl_iface_parse(priv, wpa_s->conf->ctrl_interface) < 0) {
+ os_free(priv);
+ return NULL;
+ }
+
+ if (ctrl_open_pipe(priv) < 0) {
+ os_free(priv);
+ return NULL;
+ }
+
+ wpa_msg_register_cb(wpa_supplicant_ctrl_iface_msg_cb);
+
+ return priv;
+}
+
+
+void wpa_supplicant_ctrl_iface_deinit(struct ctrl_iface_priv *priv)
+{
+ while (priv->ctrl_dst)
+ ctrl_close_pipe(priv->ctrl_dst);
+ if (priv->sec_attr_set)
+ LocalFree(priv->attr.lpSecurityDescriptor);
+ os_free(priv);
+}
+
+
+static void wpa_supplicant_ctrl_iface_send(struct ctrl_iface_priv *priv,
+ int level, const char *buf,
+ size_t len)
+{
+ struct wpa_ctrl_dst *dst, *next;
+ char levelstr[10];
+ int idx;
+ char *sbuf;
+ int llen;
+ DWORD written;
+
+ dst = priv->ctrl_dst;
+ if (dst == NULL)
+ return;
+
+ os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
+
+ llen = os_strlen(levelstr);
+ sbuf = os_malloc(llen + len);
+ if (sbuf == NULL)
+ return;
+
+ os_memcpy(sbuf, levelstr, llen);
+ os_memcpy(sbuf + llen, buf, len);
+
+ idx = 0;
+ while (dst) {
+ next = dst->next;
+ if (dst->attached && level >= dst->debug_level) {
+ wpa_printf(MSG_DEBUG, "CTRL_IFACE monitor send %p",
+ dst);
+ if (!WriteFile(dst->pipe, sbuf, llen + len, &written,
+ NULL)) {
+ wpa_printf(MSG_DEBUG, "CTRL: WriteFile to dst "
+ "%p failed: %d",
+ dst, (int) GetLastError());
+ dst->errors++;
+ if (dst->errors > 10)
+ ctrl_close_pipe(dst);
+ } else
+ dst->errors = 0;
+ }
+ idx++;
+ dst = next;
+ }
+ os_free(sbuf);
+}
+
+
+void wpa_supplicant_ctrl_iface_wait(struct ctrl_iface_priv *priv)
+{
+ wpa_printf(MSG_DEBUG, "CTRL_IFACE - %s - wait for monitor",
+ priv->wpa_s->ifname);
+ if (priv->ctrl_dst == NULL)
+ return;
+ WaitForSingleObject(priv->ctrl_dst->pipe, INFINITE);
+}
+
+
+/* Global ctrl_iface */
+
+struct ctrl_iface_global_priv;
+
+struct wpa_global_dst {
+ /* Note: OVERLAPPED must be the first member of struct wpa_global_dst
+ */
+ OVERLAPPED overlap;
+ struct wpa_global_dst *next, *prev;
+ struct ctrl_iface_global_priv *priv;
+ HANDLE pipe;
+ char req_buf[REQUEST_BUFSIZE];
+ char *rsp_buf;
+ int used;
+};
+
+struct ctrl_iface_global_priv {
+ struct wpa_global *global;
+ struct wpa_global_dst *ctrl_dst;
+};
+
+
+static void global_flush_broken_pipes(struct ctrl_iface_global_priv *priv)
+{
+ struct wpa_global_dst *dst, *next;
+
+ dst = priv->ctrl_dst;
+
+ while (dst) {
+ next = dst->next;
+ if (ctrl_broken_pipe(dst->pipe, dst->used)) {
+ wpa_printf(MSG_DEBUG, "CTRL: closing broken pipe %p",
+ dst);
+ global_close_pipe(dst);
+ }
+ dst = next;
+ }
+}
+
+
+static int global_open_pipe(struct ctrl_iface_global_priv *priv)
+{
+ struct wpa_global_dst *dst;
+ DWORD err;
+
+ dst = os_zalloc(sizeof(*dst));
+ if (dst == NULL)
+ return -1;
+ wpa_printf(MSG_DEBUG, "CTRL: Open pipe %p", dst);
+
+ dst->priv = priv;
+ dst->pipe = INVALID_HANDLE_VALUE;
+
+ dst->overlap.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
+ if (dst->overlap.hEvent == NULL) {
+ wpa_printf(MSG_ERROR, "CTRL: CreateEvent failed: %d",
+ (int) GetLastError());
+ goto fail;
+ }
+
+ eloop_register_event(dst->overlap.hEvent,
+ sizeof(dst->overlap.hEvent),
+ wpa_supplicant_global_iface_receive, dst, NULL);
+
+ /* TODO: add support for configuring access list for the pipe */
+ dst->pipe = CreateNamedPipe(NAMED_PIPE_PREFIX,
+ PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
+ PIPE_TYPE_MESSAGE |
+ PIPE_READMODE_MESSAGE |
+ PIPE_WAIT,
+ 10, REPLY_BUFSIZE, REQUEST_BUFSIZE,
+ 1000, NULL);
+ if (dst->pipe == INVALID_HANDLE_VALUE) {
+ wpa_printf(MSG_ERROR, "CTRL: CreateNamedPipe failed: %d",
+ (int) GetLastError());
+ goto fail;
+ }
+
+ if (ConnectNamedPipe(dst->pipe, &dst->overlap)) {
+ wpa_printf(MSG_ERROR, "CTRL: ConnectNamedPipe failed: %d",
+ (int) GetLastError());
+ CloseHandle(dst->pipe);
+ os_free(dst);
+ return -1;
+ }
+
+ err = GetLastError();
+ switch (err) {
+ case ERROR_IO_PENDING:
+ wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: connection in "
+ "progress");
+ break;
+ case ERROR_PIPE_CONNECTED:
+ wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe: already "
+ "connected");
+ if (SetEvent(dst->overlap.hEvent))
+ break;
+ /* fall through */
+ default:
+ wpa_printf(MSG_DEBUG, "CTRL: ConnectNamedPipe error: %d",
+ (int) err);
+ CloseHandle(dst->pipe);
+ os_free(dst);
+ return -1;
+ }
+
+ dst->next = priv->ctrl_dst;
+ if (dst->next)
+ dst->next->prev = dst;
+ priv->ctrl_dst = dst;
+
+ return 0;
+
+fail:
+ global_close_pipe(dst);
+ return -1;
+}
+
+
+static void global_close_pipe(struct wpa_global_dst *dst)
+{
+ wpa_printf(MSG_DEBUG, "CTRL: close pipe %p", dst);
+
+ if (dst->overlap.hEvent) {
+ eloop_unregister_event(dst->overlap.hEvent,
+ sizeof(dst->overlap.hEvent));
+ CloseHandle(dst->overlap.hEvent);
+ }
+
+ if (dst->pipe != INVALID_HANDLE_VALUE) {
+ /*
+ * Could use FlushFileBuffers() here to guarantee that all data
+ * gets delivered to the client, but that can block, so let's
+ * not do this for now.
+ * FlushFileBuffers(dst->pipe);
+ */
+ CloseHandle(dst->pipe);
+ }
+
+ if (dst->prev)
+ dst->prev->next = dst->next;
+ else
+ dst->priv->ctrl_dst = dst->next;
+ if (dst->next)
+ dst->next->prev = dst->prev;
+
+ os_free(dst->rsp_buf);
+ os_free(dst);
+}
+
+
+static VOID WINAPI global_iface_write_completed(DWORD err, DWORD bytes,
+ LPOVERLAPPED overlap)
+{
+ struct wpa_global_dst *dst = (struct wpa_global_dst *) overlap;
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped write completed: dst=%p "
+ "err=%d bytes=%d", dst, (int) err, (int) bytes);
+ if (err) {
+ global_close_pipe(dst);
+ return;
+ }
+
+ os_free(dst->rsp_buf);
+ dst->rsp_buf = NULL;
+
+ if (!ReadFileEx(dst->pipe, dst->req_buf, sizeof(dst->req_buf),
+ &dst->overlap, global_iface_read_completed)) {
+ wpa_printf(MSG_DEBUG, "CTRL: ReadFileEx failed: %d",
+ (int) GetLastError());
+ global_close_pipe(dst);
+ /* FIX: if this was the pipe waiting for new global
+ * connections, at this point there are no open global pipes..
+ * Should try to open a new pipe.. */
+ return;
+ }
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped read started for %p", dst);
+}
+
+
+static void wpa_supplicant_global_iface_rx(struct wpa_global_dst *dst,
+ size_t len)
+{
+ struct wpa_global *global = dst->priv->global;
+ char *reply = NULL, *send_buf;
+ size_t reply_len = 0, send_len;
+ char *buf = dst->req_buf;
+
+ dst->used = 1;
+ if (len >= REQUEST_BUFSIZE)
+ len = REQUEST_BUFSIZE - 1;
+ buf[len] = '\0';
+
+ reply = wpa_supplicant_global_ctrl_iface_process(global, buf,
+ &reply_len);
+ if (reply) {
+ send_buf = reply;
+ send_len = reply_len;
+ } else if (reply_len) {
+ send_buf = "FAIL\n";
+ send_len = 5;
+ } else {
+ os_free(dst->rsp_buf);
+ dst->rsp_buf = NULL;
+ return;
+ }
+
+ os_free(dst->rsp_buf);
+ dst->rsp_buf = os_malloc(send_len);
+ if (dst->rsp_buf == NULL) {
+ global_close_pipe(dst);
+ os_free(reply);
+ return;
+ }
+ os_memcpy(dst->rsp_buf, send_buf, send_len);
+ os_free(reply);
+
+ if (!WriteFileEx(dst->pipe, dst->rsp_buf, send_len, &dst->overlap,
+ global_iface_write_completed)) {
+ wpa_printf(MSG_DEBUG, "CTRL: WriteFileEx failed: %d",
+ (int) GetLastError());
+ global_close_pipe(dst);
+ } else {
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped write started for %p",
+ dst);
+ }
+}
+
+
+static VOID WINAPI global_iface_read_completed(DWORD err, DWORD bytes,
+ LPOVERLAPPED overlap)
+{
+ struct wpa_global_dst *dst = (struct wpa_global_dst *) overlap;
+ wpa_printf(MSG_DEBUG, "CTRL: Overlapped read completed: dst=%p err=%d "
+ "bytes=%d", dst, (int) err, (int) bytes);
+ if (err == 0 && bytes > 0)
+ wpa_supplicant_global_iface_rx(dst, bytes);
+}
+
+
+static void wpa_supplicant_global_iface_receive(void *eloop_data,
+ void *user_ctx)
+{
+ struct wpa_global_dst *dst = eloop_data;
+ struct ctrl_iface_global_priv *priv = dst->priv;
+ DWORD bytes;
+
+ wpa_printf(MSG_DEBUG, "CTRL: wpa_supplicant_global_iface_receive");
+ ResetEvent(dst->overlap.hEvent);
+
+ if (!GetOverlappedResult(dst->pipe, &dst->overlap, &bytes, FALSE)) {
+ wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult failed: %d",
+ (int) GetLastError());
+ return;
+ }
+ wpa_printf(MSG_DEBUG, "CTRL: GetOverlappedResult: New client "
+ "connected");
+
+ /* Open a new named pipe for the next client. */
+ if (global_open_pipe(priv) < 0) {
+ wpa_printf(MSG_DEBUG, "CTRL: global_open_pipe failed");
+ return;
+ }
+
+ /* Use write completion function to start reading a command */
+ global_iface_write_completed(0, 0, &dst->overlap);
+
+ global_flush_broken_pipes(priv);
+}
+
+
+struct ctrl_iface_global_priv *
+wpa_supplicant_global_ctrl_iface_init(struct wpa_global *global)
+{
+ struct ctrl_iface_global_priv *priv;
+
+ priv = os_zalloc(sizeof(*priv));
+ if (priv == NULL)
+ return NULL;
+ priv->global = global;
+
+ if (global_open_pipe(priv) < 0) {
+ os_free(priv);
+ return NULL;
+ }
+
+ return priv;
+}
+
+
+void
+wpa_supplicant_global_ctrl_iface_deinit(struct ctrl_iface_global_priv *priv)
+{
+ while (priv->ctrl_dst)
+ global_close_pipe(priv->ctrl_dst);
+ os_free(priv);
+}