106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/* sync_pipe_write.c
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <config.h>
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#include <string.h>
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#include <glib.h>
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#include <wsutil/file_util.h>
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#include <wsutil/ws_assert.h>
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#include "sync_pipe.h"
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/****************************************************************************************************************/
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/* sync_pipe handling */
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/* write a single message header to the recipient pipe */
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ssize_t
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pipe_write_header(int pipe_fd, char indicator, int length)
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{
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guchar header[1+3]; /* indicator + 3-byte len */
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ws_assert(length <= SP_MAX_MSG_LEN);
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/* write header (indicator + 3-byte len) */
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header[0] = indicator;
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header[1] = (length >> 16) & 0xFF;
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header[2] = (length >> 8) & 0xFF;
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header[3] = (length >> 0) & 0xFF;
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/* write header */
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return ws_write(pipe_fd, header, sizeof header);
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}
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/* write a message to the recipient pipe in the standard format
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(3 digit message length (excluding length and indicator field),
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1 byte message indicator and the rest is the message).
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If msg is NULL, the message has only a length and indicator. */
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void
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pipe_write_block(int pipe_fd, char indicator, const char *msg)
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{
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ssize_t ret;
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int len;
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/*ws_warning("write %d enter", pipe_fd);*/
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if(msg != NULL) {
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len = (int) strlen(msg) + 1; /* including the terminating '\0'! */
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} else {
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len = 0;
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}
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/* write header (indicator + 3-byte len) */
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ret = pipe_write_header(pipe_fd, indicator, len);
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if(ret == -1) {
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return;
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}
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/* write value (if we have one) */
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if(len) {
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/*ws_warning("write %d indicator: %c value len: %u msg: %s", pipe_fd, indicator, len, msg);*/
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ret = ws_write(pipe_fd, msg, len);
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if(ret == -1) {
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return;
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}
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} else {
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/*ws_warning("write %d indicator: %c no value", pipe_fd, indicator);*/
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}
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/*ws_warning("write %d leave", pipe_fd);*/
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}
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void
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sync_pipe_errmsg_to_parent(int pipe_fd, const char *error_msg,
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const char *secondary_error_msg)
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{
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/* Write a message header containing the length of the two messages followed by the primary and secondary error messagess */
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pipe_write_header(pipe_fd, SP_ERROR_MSG, (int) (strlen(error_msg) + 1 + 4 + strlen(secondary_error_msg) + 1 + 4));
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pipe_write_block(pipe_fd, SP_ERROR_MSG, error_msg);
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pipe_write_block(pipe_fd, SP_ERROR_MSG, secondary_error_msg);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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