2 Unix SMB/CIFS implementation.
4 Copyright (C) Volker Lendecke 2007
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "../lib/util/select.h"
22 #include "system/filesys.h"
23 #include "system/select.h"
24 #include "ctdb_packet.h"
26 struct ctdb_packet_context {
32 * Close the underlying fd
34 static int ctdb_packet_context_destructor(struct ctdb_packet_context *ctx)
36 return close(ctx->fd);
40 * Initialize a ctdb_packet context. The fd is given to the ctdb_packet context, meaning
41 * that it is automatically closed when the ctdb_packet context is freed.
43 struct ctdb_packet_context *ctdb_packet_init(TALLOC_CTX *mem_ctx, int fd)
45 struct ctdb_packet_context *result;
47 if (!(result = TALLOC_ZERO_P(mem_ctx, struct ctdb_packet_context))) {
52 talloc_set_destructor(result, ctdb_packet_context_destructor);
57 * Pull data from the fd
59 NTSTATUS ctdb_packet_fd_read(struct ctdb_packet_context *ctx)
65 res = ioctl(ctx->fd, FIONREAD, &available);
68 DEBUG(10, ("ioctl(FIONREAD) failed: %s\n", strerror(errno)));
69 return map_nt_error_from_unix(errno);
72 SMB_ASSERT(available >= 0);
75 return NT_STATUS_END_OF_FILE;
78 new_size = ctx->in.length + available;
80 if (new_size < ctx->in.length) {
81 DEBUG(0, ("integer wrap\n"));
82 return NT_STATUS_NO_MEMORY;
85 if (!(in = talloc_realloc(ctx, ctx->in.data, uint8, new_size))) {
86 DEBUG(10, ("talloc failed\n"));
87 return NT_STATUS_NO_MEMORY;
92 res = recv(ctx->fd, in + ctx->in.length, available, 0);
95 DEBUG(10, ("recv failed: %s\n", strerror(errno)));
96 return map_nt_error_from_unix(errno);
100 return NT_STATUS_END_OF_FILE;
103 ctx->in.length += res;
108 NTSTATUS ctdb_packet_fd_read_sync_timeout(struct ctdb_packet_context *ctx, int timeout)
112 res = poll_one_fd(ctx->fd, POLLIN|POLLHUP, timeout, &revents);
114 DEBUG(10, ("poll timed out\n"));
115 return NT_STATUS_IO_TIMEOUT;
119 DEBUG(10, ("poll returned %s\n", strerror(errno)));
120 return map_nt_error_from_unix(errno);
122 if ((revents & (POLLIN|POLLHUP|POLLERR)) == 0) {
123 DEBUG(10, ("socket not readable\n"));
124 return NT_STATUS_IO_TIMEOUT;
127 return ctdb_packet_fd_read(ctx);
130 bool ctdb_packet_handler(struct ctdb_packet_context *ctx,
131 bool (*full_req)(const uint8_t *buf,
135 NTSTATUS (*callback)(uint8_t *buf, size_t length,
137 void *priv, NTSTATUS *status)
142 if (!full_req(ctx->in.data, ctx->in.length, &length, priv)) {
146 if (length > ctx->in.length) {
147 *status = NT_STATUS_INTERNAL_ERROR;
151 if (length == ctx->in.length) {
156 buf = (uint8_t *)TALLOC_MEMDUP(ctx, ctx->in.data, length);
158 *status = NT_STATUS_NO_MEMORY;
162 memmove(ctx->in.data, ctx->in.data + length,
163 ctx->in.length - length);
164 ctx->in.length -= length;
167 *status = callback(buf, length, priv);
172 * How many bytes of outgoing data do we have pending?
174 size_t ctdb_packet_outgoing_bytes(struct ctdb_packet_context *ctx)
176 return ctx->out.length;
180 * Push data to the fd
182 NTSTATUS ctdb_packet_fd_write(struct ctdb_packet_context *ctx)
186 sent = send(ctx->fd, ctx->out.data, ctx->out.length, 0);
189 DEBUG(0, ("send failed: %s\n", strerror(errno)));
190 return map_nt_error_from_unix(errno);
193 memmove(ctx->out.data, ctx->out.data + sent,
194 ctx->out.length - sent);
195 ctx->out.length -= sent;
201 * Sync flush all outgoing bytes
203 NTSTATUS ctdb_packet_flush(struct ctdb_packet_context *ctx)
205 while (ctx->out.length != 0) {
206 NTSTATUS status = ctdb_packet_fd_write(ctx);
207 if (!NT_STATUS_IS_OK(status)) {
215 * Send a list of DATA_BLOBs
217 * Example: ctdb_packet_send(ctx, 2, data_blob_const(&size, sizeof(size)),
218 * data_blob_const(buf, size));
220 NTSTATUS ctdb_packet_send(struct ctdb_packet_context *ctx, int num_blobs, ...)
227 len = ctx->out.length;
229 va_start(ap, num_blobs);
230 for (i=0; i<num_blobs; i++) {
232 DATA_BLOB blob = va_arg(ap, DATA_BLOB);
234 tmp = len + blob.length;
236 DEBUG(0, ("integer overflow\n"));
238 return NT_STATUS_NO_MEMORY;
248 if (!(out = talloc_realloc(ctx, ctx->out.data, uint8, len))) {
249 DEBUG(0, ("talloc failed\n"));
250 return NT_STATUS_NO_MEMORY;
255 va_start(ap, num_blobs);
256 for (i=0; i<num_blobs; i++) {
257 DATA_BLOB blob = va_arg(ap, DATA_BLOB);
259 memcpy(ctx->out.data+ctx->out.length, blob.data, blob.length);
260 ctx->out.length += blob.length;
264 SMB_ASSERT(ctx->out.length == len);
269 * Get the ctdb_packet context's file descriptor
271 int ctdb_packet_get_fd(struct ctdb_packet_context *ctx)