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1
2 /*
3  * dot.c
4  *
5  * Copyright (c) 2004 Brian Fundakowski Feldman
6  * Copyright (c) 1996-1999 Whistle Communications, Inc.
7  * All rights reserved.
8  * 
9  * Subject to the following obligations and disclaimer of warranty, use and
10  * redistribution of this software, in source or object code forms, with or
11  * without modifications are expressly permitted by Whistle Communications;
12  * provided, however, that:
13  * 1. Any and all reproductions of the source or object code must include the
14  *    copyright notice above and the following disclaimer of warranties; and
15  * 2. No rights are granted, in any manner or form, to use Whistle
16  *    Communications, Inc. trademarks, including the mark "WHISTLE
17  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
18  *    such appears in the above copyright notice or in the software.
19  * 
20  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
21  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
22  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
23  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
25  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
26  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
27  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
28  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
29  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
30  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
31  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
32  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
36  * OF SUCH DAMAGE.
37  *
38  * $FreeBSD$
39  */
40
41 #include <err.h>
42 #include <inttypes.h>
43 #include <netgraph.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <unistd.h>
47
48 #include "ngctl.h"
49
50 #define UNNAMED         "\\<unnamed\\>"
51
52 static int DotCmd(int ac, char **av);
53
54 const struct ngcmd dot_cmd = {
55         DotCmd,
56         "dot [outputfile]",
57         "Produce a GraphViz (.dot) of the entire netgraph.",
58         "If no outputfile is specified, stdout will be assumed.",
59         { "graphviz", "confdot" }
60 };
61
62 static int
63 DotCmd(int ac, char **av)
64 {
65         struct ng_mesg *nlresp;
66         struct namelist *nlist;
67         FILE *f = stdout;
68         int ch;
69         u_int i;
70
71         /* Get options */
72         optind = 1;
73         while ((ch = getopt(ac, av, "")) != -1) {
74                 switch (ch) {
75                 case '?':
76                 default:
77                         return (CMDRTN_USAGE);
78                         break;
79                 }
80         }
81         ac -= optind;
82         av += optind;
83
84         /* Get arguments */
85         switch (ac) {
86         case 1:
87                 f = fopen(av[0], "w");
88                 if (f == NULL) {
89                         warn("Could not open %s for writing", av[0]);
90                         return (CMDRTN_ERROR);
91                 }
92         case 0:
93                 break;
94         default:
95                 if (f != stdout)
96                         (void)fclose(f);
97                 return (CMDRTN_USAGE);
98         }
99
100         /* Get list of nodes */
101         if (NgSendMsg(csock, ".", NGM_GENERIC_COOKIE, NGM_LISTNODES, NULL,
102             0) < 0) {
103                 warn("send listnodes msg");
104                 goto error;
105         }
106         if (NgAllocRecvMsg(csock, &nlresp, NULL) < 0) {
107                 warn("recv listnodes msg");
108                 goto error;
109         }
110
111         nlist = (struct namelist *)nlresp->data;
112         fprintf(f, "graph netgraph {\n");
113         /* TODO: implement rank = same or subgraphs at some point */
114         fprintf(f, "\tedge [ weight = 1.0 ];\n");
115         fprintf(f, "\tnode [ shape = record, fontsize = 12 ] {\n");
116         for (i = 0; i < nlist->numnames; i++)
117                 fprintf(f, "\t\t\"%jx\" [ label = \"{%s:|{%s|[%jx]:}}\" ];\n",
118                     (uintmax_t)nlist->nodeinfo[i].id,
119                     nlist->nodeinfo[i].name[0] != '\0' ?
120                     nlist->nodeinfo[i].name : UNNAMED,
121                     nlist->nodeinfo[i].type, (uintmax_t)nlist->nodeinfo[i].id);
122         fprintf(f, "\t};\n");
123
124         fprintf(f, "\tsubgraph cluster_disconnected {\n");
125         fprintf(f, "\t\tbgcolor = pink;\n");
126         for (i = 0; i < nlist->numnames; i++)
127                 if (nlist->nodeinfo[i].hooks == 0)
128                         fprintf(f, "\t\t\"%jx\";\n",
129                             (uintmax_t)nlist->nodeinfo[i].id);
130         fprintf(f, "\t};\n");
131
132         for (i = 0; i < nlist->numnames; i++) {
133                 struct ng_mesg *hlresp;
134                 struct hooklist *hlist;
135                 struct nodeinfo *ninfo;
136                 char path[NG_PATHSIZ];
137                 u_int j;
138
139                 (void)snprintf(path, sizeof(path), "[%jx]:",
140                     (uintmax_t)nlist->nodeinfo[i].id);
141
142                 /* Get node info and hook list */
143                 if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS,
144                     NULL, 0) < 0) {
145                         free(nlresp);
146                         warn("send listhooks msg");
147                         goto error;
148                 }
149                 if (NgAllocRecvMsg(csock, &hlresp, NULL) < 0) {
150                         free(nlresp);
151                         warn("recv listhooks msg");
152                         goto error;
153                 }
154
155                 hlist = (struct hooklist *)hlresp->data;
156                 ninfo = &hlist->nodeinfo;
157                 if (ninfo->hooks == 0) {
158                         free(hlresp);
159                         continue;
160                 }
161
162                 fprintf(f, "\tnode [ shape = octagon, fontsize = 10 ] {\n");
163                 for (j = 0; j < ninfo->hooks; j++)
164                         fprintf(f, "\t\t\"%jx.%s\" [ label = \"%s\" ];\n",
165                             (uintmax_t)nlist->nodeinfo[i].id,
166                             hlist->link[j].ourhook, hlist->link[j].ourhook);
167                 fprintf(f, "\t};\n");
168
169                 fprintf(f, "\t{\n\t\tedge [ weight = 2.0, style = bold ];\n");
170                 for (j = 0; j < ninfo->hooks; j++)
171                         fprintf(f, "\t\t\"%jx\" -- \"%jx.%s\";\n",
172                             (uintmax_t)nlist->nodeinfo[i].id,
173                             (uintmax_t)nlist->nodeinfo[i].id,
174                             hlist->link[j].ourhook);
175                 fprintf(f, "\t};\n");
176
177                 for (j = 0; j < ninfo->hooks; j++) {
178                         /* Only print the edges going in one direction. */
179                         if (hlist->link[j].nodeinfo.id > nlist->nodeinfo[i].id)
180                                 continue;
181                         fprintf(f, "\t\"%jx.%s\" -- \"%jx.%s\";\n",
182                             (uintmax_t)nlist->nodeinfo[i].id,
183                             hlist->link[j].ourhook,
184                             (uintmax_t)hlist->link[j].nodeinfo.id,
185                             hlist->link[j].peerhook);
186                 }
187                 free(hlresp);
188         }
189
190         fprintf(f, "};\n");
191
192         free(nlresp);
193         if (f != stdout)
194                 (void)fclose(f);
195         return (CMDRTN_OK);
196 error:
197         if (f != stdout)
198                 (void)fclose(f);
199         return (CMDRTN_ERROR);
200 }