1 /*
2 * config.c
3 *
4 * Copyright (c) 1996-1999 Whistle Communications, Inc.
5 * All rights reserved.
6 *
7 * Subject to the following obligations and disclaimer of warranty, use and
8 * redistribution of this software, in source or object code forms, with or
9 * without modifications are expressly permitted by Whistle Communications;
10 * provided, however, that:
11 * 1. Any and all reproductions of the source or object code must include the
12 * copyright notice above and the following disclaimer of warranties; and
13 * 2. No rights are granted, in any manner or form, to use Whistle
14 * Communications, Inc. trademarks, including the mark "WHISTLE
15 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
16 * such appears in the above copyright notice or in the software.
17 *
18 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
19 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
20 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
21 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
23 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
24 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
25 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
26 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
27 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
28 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
29 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
34 * OF SUCH DAMAGE.
35 */
36
37 #include <err.h>
38 #include <errno.h>
39 #include <netgraph.h>
40 #include <stdio.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 #include "ngctl.h"
45
46 #define NOCONFIG "<no config>"
47
48 static int ConfigCmd(int ac, char **av);
49
50 const struct ngcmd config_cmd = {
51 ConfigCmd,
52 "config <path> [arguments]",
53 "get or set configuration of node at <path>",
54 NULL,
55 { NULL }
56 };
57
58 static int
ConfigCmd(int ac,char ** av)59 ConfigCmd(int ac, char **av)
60 {
61 u_char sbuf[sizeof(struct ng_mesg) + NG_TEXTRESPONSE];
62 struct ng_mesg *const resp = (struct ng_mesg *) sbuf;
63 char *const status = (char *) resp->data;
64 char *path;
65 char buf[NG_TEXTRESPONSE], *pos, *end;
66 int nostat = 0, i;
67
68 /* Get arguments */
69 if (ac < 2)
70 return (CMDRTN_USAGE);
71 path = av[1];
72
73 pos = buf;
74 end = buf + sizeof(buf);
75 for (i = 2; i < ac; i++) {
76 if (i > 2) {
77 if (pos == end)
78 return (CMDRTN_USAGE);
79 *pos++ = ' ';
80 }
81 if ((pos += strlcpy(pos, av[i], end - pos)) >= end)
82 return (CMDRTN_USAGE);
83 }
84 *pos = '\0';
85
86 /* Get node config summary */
87 if (*buf != '\0')
88 i = NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
89 NGM_TEXT_CONFIG, buf, pos - buf + 1);
90 else
91 i = NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
92 NGM_TEXT_CONFIG, NULL, 0);
93 if (i < 0) {
94 switch (errno) {
95 case EINVAL:
96 nostat = 1;
97 break;
98 default:
99 warn("send msg");
100 return (CMDRTN_ERROR);
101 }
102 } else {
103 if (NgRecvMsg(csock, resp, sizeof(sbuf), NULL) < 0 ||
104 (resp->header.flags & NGF_RESP) == 0)
105 nostat = 1;
106 }
107
108 /* Show it */
109 if (nostat)
110 printf("No config available for \"%s\"\n", path);
111 else
112 printf("Config for \"%s\":\n%s\n", path, status);
113 return (CMDRTN_OK);
114 }
115