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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 <inttypes.h>
42
43 #include "ngctl.h"
44
45 #define UNNAMED         "\\<unnamed\\>"
46
47 static int DotCmd(int ac, char **av);
48
49 const struct ngcmd dot_cmd = {
50         DotCmd,
51         "dot [outputfile]",
52         "Produce a GraphViz (.dot) of the entire netgraph.",
53         "If no outputfile is specified, stdout will be assumed.",
54         { "graphviz", "confdot" }
55 };
56
57 static int
58 DotCmd(int ac, char **av)
59 {
60         struct ng_mesg *nlresp;
61         struct namelist *nlist;
62         FILE *f = stdout;
63         int ch;
64         u_int i;
65
66         /* Get options */
67         optind = 1;
68         while ((ch = getopt(ac, av, "")) != EOF) {
69                 switch (ch) {
70                 case '?':
71                 default:
72                         return (CMDRTN_USAGE);
73                         break;
74                 }
75         }
76         ac -= optind;
77         av += optind;
78
79         /* Get arguments */
80         switch (ac) {
81         case 1:
82                 f = fopen(av[0], "w");
83                 if (f == NULL) {
84                         warn("Could not open %s for writing", av[0]);
85                         return (CMDRTN_ERROR);
86                 }
87         case 0:
88                 break;
89         default:
90                 if (f != stdout)
91                         (void)fclose(f);
92                 return (CMDRTN_USAGE);
93         }
94
95         /* Get list of nodes */
96         if (NgSendMsg(csock, ".", NGM_GENERIC_COOKIE, NGM_LISTNODES, NULL,
97             0) < 0) {
98                 warn("send listnodes msg");
99                 goto error;
100         }
101         if (NgAllocRecvMsg(csock, &nlresp, NULL) < 0) {
102                 warn("recv listnodes msg");
103                 goto error;
104         }
105
106         nlist = (struct namelist *)nlresp->data;
107         fprintf(f, "graph netgraph {\n");
108         /* TODO: implement rank = same or subgraphs at some point */
109         fprintf(f, "\tedge [ weight = 1.0 ];\n");
110         fprintf(f, "\tnode [ shape = record, fontsize = 12 ] {\n");
111         for (i = 0; i < nlist->numnames; i++)
112                 fprintf(f, "\t\t\"%jx\" [ label = \"{%s:|{%s|[%jx]:}}\" ];\n",
113                     (uintmax_t)nlist->nodeinfo[i].id,
114                     nlist->nodeinfo[i].name[0] != '\0' ?
115                     nlist->nodeinfo[i].name : UNNAMED,
116                     nlist->nodeinfo[i].type, (uintmax_t)nlist->nodeinfo[i].id);
117         fprintf(f, "\t};\n");
118
119         fprintf(f, "\tsubgraph cluster_disconnected {\n");
120         fprintf(f, "\t\tbgcolor = pink;\n");
121         for (i = 0; i < nlist->numnames; i++)
122                 if (nlist->nodeinfo[i].hooks == 0)
123                         fprintf(f, "\t\t\"%jx\";\n",
124                             (uintmax_t)nlist->nodeinfo[i].id);
125         fprintf(f, "\t};\n");
126
127         for (i = 0; i < nlist->numnames; i++) {
128                 struct ng_mesg *hlresp;
129                 struct hooklist *hlist;
130                 struct nodeinfo *ninfo;
131                 char path[NG_PATHSIZ];
132                 u_int j;
133
134                 (void)snprintf(path, sizeof(path), "[%jx]:",
135                     (uintmax_t)nlist->nodeinfo[i].id);
136
137                 /* Get node info and hook list */
138                 if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS,
139                     NULL, 0) < 0) {
140                         free(nlresp);
141                         warn("send listhooks msg");
142                         goto error;
143                 }
144                 if (NgAllocRecvMsg(csock, &hlresp, NULL) < 0) {
145                         free(nlresp);
146                         warn("recv listhooks msg");
147                         goto error;
148                 }
149
150                 hlist = (struct hooklist *)hlresp->data;
151                 ninfo = &hlist->nodeinfo;
152                 if (ninfo->hooks == 0) {
153                         free(hlresp);
154                         continue;
155                 }
156
157                 fprintf(f, "\tnode [ shape = octagon, fontsize = 10 ] {\n");
158                 for (j = 0; j < ninfo->hooks; j++)
159                         fprintf(f, "\t\t\"%jx.%s\" [ label = \"%s\" ];\n",
160                             (uintmax_t)nlist->nodeinfo[i].id,
161                             hlist->link[j].ourhook, hlist->link[j].ourhook);
162                 fprintf(f, "\t};\n");
163
164                 fprintf(f, "\t{\n\t\tedge [ weight = 2.0, style = bold ];\n");
165                 for (j = 0; j < ninfo->hooks; j++)
166                         fprintf(f, "\t\t\"%jx\" -- \"%jx.%s\";\n",
167                             (uintmax_t)nlist->nodeinfo[i].id,
168                             (uintmax_t)nlist->nodeinfo[i].id,
169                             hlist->link[j].ourhook);
170                 fprintf(f, "\t};\n");
171
172                 for (j = 0; j < ninfo->hooks; j++) {
173                         /* Only print the edges going in one direction. */
174                         if (hlist->link[j].nodeinfo.id > nlist->nodeinfo[i].id)
175                                 continue;
176                         fprintf(f, "\t\"%jx.%s\" -- \"%jx.%s\";\n",
177                             (uintmax_t)nlist->nodeinfo[i].id,
178                             hlist->link[j].ourhook,
179                             (uintmax_t)hlist->link[j].nodeinfo.id,
180                             hlist->link[j].peerhook);
181                 }
182                 free(hlresp);
183         }
184
185         fprintf(f, "};\n");
186
187         free(nlresp);
188         if (f != stdout)
189                 (void)fclose(f);
190         return (CMDRTN_OK);
191 error:
192         if (f != stdout)
193                 (void)fclose(f);
194         return (CMDRTN_ERROR);
195 }