1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2017 Olaf Wintermann. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "srvctrlsocket.h"
30
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <string.h>
35 #include <sys/socket.h>
36 #include <sys/un.h>
37
38 SrvConnection* srvctrl_connet(char *socketfile) {
39 if(!socketfile) {
40 fprintf(stderr, "srvctrl_connect: no socketfile\n");
41 return NULL;
42 }
43 size_t len = strlen(socketfile);
44 if(len == 0) {
45 fprintf(stderr, "srvctrl_connect: invalid socket path\n");
46 return NULL;
47 }
48 if(len > 100) {
49 fprintf(stderr, "srvctrl_connect: socket path too long\n");
50 return NULL;
51 }
52
53 int fd = socket(AF_UNIX, SOCK_STREAM, 0);
54 if(fd == -1) {
55 perror("srvctrl_connect: cannot create socket");
56 return NULL;
57 }
58
59 struct sockaddr_un addr;
60 memset(&addr, 0, sizeof(addr));
61 addr.sun_family = AF_UNIX;
62 memcpy(addr.sun_path, socketfile, len);
63
64 if(connect(fd, (struct sockaddr*)&addr, sizeof(addr))) {
65 perror("srvctrl_connect");
66 close(fd);
67 return NULL;
68 }
69
70 FILE *stream = fdopen(fd, "r+");
71 if(!stream) {
72 close(fd);
73 return NULL;
74 }
75
76 SrvConnection *conn = calloc(1, sizeof(SrvConnection));
77 conn->socket = fd;
78 conn->stream = stream;
79
80 return conn;
81 }
82
83 void srvctrl_close(SrvConnection *conn) {
84 fclose(conn->stream);
85 free(conn);
86 }
87
88 int srvctrl_readmsg(SrvConnection *conn, SrvMsg *msg) {
89 int type = 0;
90 uint16_t length;
91
92 type = fgetc(conn->stream);
93 if(type == EOF) {
94 return 1;
95 }
96
97 if(fread(&length, 1, 2, conn->stream) != 2) {
98 return -1;
99 }
100
101 msg->type = type;
102 msg->length = length;
103 msg->message = malloc(length);
104
105 size_t r = fread(msg->message, 1, length, conn->stream);
106 if(r != length) {
107 free(msg->message);
108 return -1;
109 }
110
111 return 0;
112 }
113