1 /*
2 * msg.c
3 *
4 * Copyright (c) 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 * $Whistle: msg.c,v 1.2 1999/11/29 23:38:35 archie Exp $
37 * $FreeBSD: src/usr.sbin/ngctl/msg.c,v 1.1.4.1 2000/07/27 22:05:36 archie Exp $
38 * $DragonFly: src/usr.sbin/ngctl/msg.c,v 1.5 2007/06/04 00:40:31 swildner Exp $
39 */
40
41 #include "ngctl.h"
42
43 #define BUF_SIZE 4096
44
45 static int MsgCmd(int ac, const char **av);
46
47 const struct ngcmd msg_cmd = {
48 MsgCmd,
49 "msg path command [args ... ]",
50 "Send a netgraph control message to the node at \"path\"",
51 "The msg command constructs a netgraph control message from the"
52 " command name and ASCII arguments (if any) and sends that message"
53 " to the node. It does this by first asking the node to convert"
54 " the ASCII message into binary format, and resending the result.",
55 { "cmd" }
56 };
57
58 static int
MsgCmd(int ac,const char ** av)59 MsgCmd(int ac, const char **av)
60 {
61 char buf[BUF_SIZE];
62 const char *path, *cmdstr;
63 int i;
64
65 /* Get arguments */
66 if (ac < 3)
67 return(CMDRTN_USAGE);
68 path = av[1];
69 cmdstr = av[2];
70
71 /* Put command and arguments back together as one string */
72 for (*buf = '\0', i = 3; i < ac; i++) {
73 snprintf(buf + strlen(buf),
74 sizeof(buf) - strlen(buf), " %s", av[i]);
75 }
76
77 /* Send it */
78 if (NgSendAsciiMsg(csock, path, "%s%s", cmdstr, buf) < 0) {
79 warn("send msg");
80 return(CMDRTN_ERROR);
81 }
82
83 /* See if a synchronous reply awaits */
84 {
85 struct timeval tv;
86 fd_set rfds;
87
88 FD_ZERO(&rfds);
89 FD_SET(csock, &rfds);
90 memset(&tv, 0, sizeof(tv));
91 switch (select(csock + 1, &rfds, NULL, NULL, &tv)) {
92 case -1:
93 err(EX_OSERR, "select");
94 case 0:
95 break;
96 default:
97 MsgRead();
98 break;
99 }
100 }
101
102 /* Done */
103 return(CMDRTN_OK);
104 }
105
106 /*
107 * Read and display the next incoming control message
108 */
109 void
MsgRead(void)110 MsgRead(void)
111 {
112 u_char buf[2 * sizeof(struct ng_mesg) + BUF_SIZE];
113 struct ng_mesg *const m = (struct ng_mesg *)buf;
114 struct ng_mesg *const ascii = (struct ng_mesg *)m->data;
115 char path[NG_PATHSIZ];
116
117 /* Get incoming message (in binary form) */
118 if (NgRecvMsg(csock, m, sizeof(buf), path) < 0) {
119 warn("recv incoming message");
120 return;
121 }
122
123 /* Ask originating node to convert message to ASCII */
124 if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
125 NGM_BINARY2ASCII, m, sizeof(*m) + m->header.arglen) < 0
126 || NgRecvMsg(csock, m, sizeof(buf), NULL) < 0) {
127 printf("Rec'd %s %d from \"%s\":\n",
128 (m->header.flags & NGF_RESP) != 0 ? "response" : "command",
129 m->header.cmd, path);
130 if (m->header.arglen == 0)
131 printf("No arguments\n");
132 else
133 DumpAscii(m->data, m->header.arglen);
134 return;
135 }
136
137 /* Display message in ASCII form */
138 printf("Rec'd %s \"%s\" (%d) from \"%s\":\n",
139 (ascii->header.flags & NGF_RESP) != 0 ? "response" : "command",
140 ascii->header.cmdstr, ascii->header.cmd, path);
141 if (*ascii->data != '\0')
142 printf("Args:\t%s\n", ascii->data);
143 else
144 printf("No arguments\n");
145 }
146