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1.1 misho 1:
2: /*
3: * ng.c
4: *
5: * Written by Archie Cobbs <archie@freebsd.org>
6: * Copyright (c) 1995-1999 Whistle Communications, Inc. All rights reserved.
7: * See ``COPYRIGHT.whistle''
8: */
9:
10: #include "ppp.h"
11: #include "ng.h"
12: #include "phys.h"
13: #include "ngfunc.h"
14: #include "log.h"
15:
16: #include <netgraph/ng_message.h>
17: #include <netgraph/ng_socket.h>
18: #include <netgraph.h>
19:
20: /*
21: * DEFINITIONS
22: */
23:
24: #define NG_MTU 1600
25: #define NG_MRU 1600
26:
27: struct nginfo {
28: char path[NG_PATHSIZ]; /* Node that takes PPP frames */
29: char hook[NG_HOOKSIZ]; /* Hook on that node */
30: };
31: typedef struct nginfo *NgInfo;
32:
33: /* Set menu options */
34: enum {
35: SET_NODE,
36: SET_HOOK
37: };
38:
39: /*
40: * INTERNAL FUNCTIONS
41: */
42:
43: static int NgInit(Link l);
44: static void NgOpen(Link l);
45: static void NgClose(Link l);
46: static void NgShutdown(Link l);
47: static void NgStat(Context ctx);
48: static int NgSetCommand(Context ctx, int ac, char *av[], void *arg);
49: static int NgIsSync(Link l);
50: static int NgPeerAddr(Link l, void *buf, size_t buf_len);
51:
52: /*
53: * GLOBAL VARIABLES
54: */
55:
56: const struct phystype gNgPhysType = {
57: .name = "ng",
58: .descr = "Netgraph hook",
59: .mtu = NG_MTU,
60: .mru = NG_MRU,
61: .tmpl = 0,
62: .init = NgInit,
63: .open = NgOpen,
64: .close = NgClose,
65: .shutdown = NgShutdown,
66: .showstat = NgStat,
67: .issync = NgIsSync,
68: .peeraddr = NgPeerAddr,
69: .callingnum = NULL,
70: .callednum = NULL,
71: };
72:
73: const struct cmdtab NgSetCmds[] = {
74: { "node {path}", "Set node to attach to",
75: NgSetCommand, NULL, 2, (void *) SET_NODE },
76: { "hook {hook}", "Set hook to attach to",
77: NgSetCommand, NULL, 2, (void *) SET_HOOK },
78: { NULL },
79: };
80:
81: /*
82: * NgInit()
83: *
84: * Initialize device-specific data in physical layer info
85: */
86:
87: static int
88: NgInit(Link l)
89: {
90: NgInfo ng;
91:
92: /* Allocate private struct */
93: ng = (NgInfo) (l->info = Malloc(MB_PHYS, sizeof(*ng)));
94: snprintf(ng->path, sizeof(ng->path), "undefined:");
95: snprintf(ng->hook, sizeof(ng->hook), "undefined");
96:
97: /* Done */
98: return(0);
99: }
100:
101: /*
102: * NgOpen()
103: */
104:
105: static void
106: NgOpen(Link l)
107: {
108: NgInfo const ng = (NgInfo) l->info;
109: char path[NG_PATHSIZ];
110: int csock = -1;
111: struct ngm_connect cn;
112:
113: if (!PhysGetUpperHook(l, path, cn.ourhook)) {
114: Log(LG_PHYS, ("[%s] NG: can't get upper hook", l->name));
115: goto fail;
116: }
117:
118: /* Get a temporary netgraph socket node */
119: if (NgMkSockNode(NULL, &csock, NULL) == -1) {
120: Perror("[%s] NG: NgMkSockNode", l->name);
121: goto fail;
122: }
123:
124: strlcpy(cn.path, ng->path, sizeof(cn.path));
125: strlcpy(cn.peerhook, ng->hook, sizeof(cn.peerhook));
126: if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE, NGM_CONNECT, &cn, sizeof(cn)) < 0) {
127: Perror("[%s] NG: can't connect \"%s\"->\"%s\" and \"%s\"->\"%s\"",
128: l->name, path, cn.ourhook, cn.path, cn.peerhook);
129: goto fail;
130: }
131:
132: close(csock);
133: l->state = PHYS_STATE_UP;
134: PhysUp(l);
135: return;
136:
137: fail:
138: if (csock>=0) {
139: close(csock);
140: csock = -1;
141: }
142: l->state = PHYS_STATE_DOWN;
143: PhysDown(l, STR_CON_FAILED0, NULL);
144: }
145:
146: /*
147: * NgClose()
148: */
149:
150: static void
151: NgClose(Link l)
152: {
153: NgInfo const ng = (NgInfo) l->info;
154: int csock = -1;
155:
156: /* Get a temporary netgraph socket node */
157: if (NgMkSockNode(NULL, &csock, NULL) == -1) {
158: Perror("[%s] NG: NgMkSockNode", l->name);
159: goto fail;
160: }
161:
162: NgFuncDisconnect(csock, l->name, ng->path, ng->hook);
163:
164: close(csock);
165: /* FALL */
166:
167: fail:
168: l->state = PHYS_STATE_DOWN;
169: PhysDown(l, STR_MANUALLY, NULL);
170: }
171:
172: /*
173: * NgShutdown()
174: */
175: static void
176: NgShutdown(Link l)
177: {
178: Freee(l->info);
179: }
180:
181: /*
182: * NgStat()
183: */
184:
185: void
186: NgStat(Context ctx)
187: {
188: NgInfo const ng = (NgInfo) ctx->lnk->info;
189:
190: Printf("Netgraph node configuration:\r\n");
191: Printf("\tNode : %s\r\n", ng->path);
192: Printf("\tHook : %s\r\n", ng->hook);
193: }
194:
195: /*
196: * NgSetCommand()
197: */
198:
199: static int
200: NgSetCommand(Context ctx, int ac, char *av[], void *arg)
201: {
202: NgInfo const ng = (NgInfo) ctx->lnk->info;
203:
204: switch ((intptr_t)arg) {
205: case SET_NODE:
206: if (ac != 1)
207: return(-1);
208: strlcpy(ng->path, av[0], sizeof(ng->path));
209: break;
210: case SET_HOOK:
211: if (ac != 1)
212: return(-1);
213: strlcpy(ng->hook, av[0], sizeof(ng->hook));
214: break;
215: default:
216: assert(0);
217: }
218: return(0);
219: }
220:
221: /*
222: * NgIsSync()
223: */
224:
225: static int
226: NgIsSync(Link l)
227: {
228: return (1);
229: }
230:
231: /*
232: * NgPeerAddr()
233: */
234:
235: static int
236: NgPeerAddr(Link l, void *buf, size_t buf_len)
237: {
238: NgInfo const ng = (NgInfo) l->info;
239:
240: if (buf_len < sizeof(ng->path))
241: return(-1);
242:
243: memcpy(buf, ng->path, sizeof(ng->path));
244:
245: return(0);
246: }