/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2017 Olaf Wintermann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "srvctrlsocket.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
SrvConnection* srvctrl_connet(char *socketfile) {
if(!socketfile) {
fprintf(stderr, "srvctrl_connect: no socketfile\n");
return NULL;
}
size_t len = strlen(socketfile);
if(len == 0) {
fprintf(stderr, "srvctrl_connect: invalid socket path\n");
return NULL;
}
if(len > 100) {
fprintf(stderr, "srvctrl_connect: socket path too long\n");
return NULL;
}
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(fd == -1) {
perror("srvctrl_connect: cannot create socket");
return NULL;
}
struct sockaddr_un addr;
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
memcpy(addr.sun_path, socketfile, len);
if(connect(fd, (struct sockaddr*)&addr, sizeof(addr))) {
perror("srvctrl_connect");
close(fd);
return NULL;
}
FILE *stream = fdopen(fd, "r+");
if(!stream) {
close(fd);
return NULL;
}
SrvConnection *conn = calloc(1, sizeof(SrvConnection));
conn->socket = fd;
conn->stream = stream;
return conn;
}
void srvctrl_close(SrvConnection *conn) {
fclose(conn->stream);
free(conn);
}
int srvctrl_readmsg(SrvConnection *conn, SrvMsg *msg) {
int type = 0;
uint16_t length;
type = fgetc(conn->stream);
if(type == EOF) {
return 1;
}
if(fread(&length, 1, 2, conn->stream) != 2) {
return -1;
}
msg->type = type;
msg->length = length;
msg->message = malloc(length);
size_t r = fread(msg->message, 1, length, conn->stream);
if(r != length) {
free(msg->message);
return -1;
}
return 0;
}