![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ns_pcb.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [CSRG BSD Unix] / 43BSDTahoe / sys / netns|
Return to ns_pcb.c CVS log | Up to [CSRG BSD Unix] / 43BSDTahoe / sys / netns |
1.1 root 1: /*
2: * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms are permitted
6: * provided that the above copyright notice and this paragraph are
7: * duplicated in all such forms and that any documentation,
8: * advertising materials, and other materials related to such
9: * distribution and use acknowledge that the software was developed
10: * by the University of California, Berkeley. The name of the
11: * University may not be used to endorse or promote products derived
12: * from this software without specific prior written permission.
13: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15: * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16: *
17: * @(#)ns_pcb.c 7.5 (Berkeley) 6/29/88
18: */
19:
20: #include "param.h"
21: #include "systm.h"
22: #include "dir.h"
23: #include "user.h"
24: #include "mbuf.h"
25: #include "socket.h"
26: #include "socketvar.h"
27: #include "../net/if.h"
28: #include "../net/route.h"
29: #include "protosw.h"
30:
31: #include "ns.h"
32: #include "ns_if.h"
33: #include "ns_pcb.h"
34:
35: struct ns_addr zerons_addr;
36:
37: ns_pcballoc(so, head)
38: struct socket *so;
39: struct nspcb *head;
40: {
41: struct mbuf *m;
42: register struct nspcb *nsp;
43:
44: m = m_getclr(M_DONTWAIT, MT_PCB);
45: if (m == NULL)
46: return (ENOBUFS);
47: nsp = mtod(m, struct nspcb *);
48: nsp->nsp_socket = so;
49: insque(nsp, head);
50: so->so_pcb = (caddr_t)nsp;
51: return (0);
52: }
53:
54: ns_pcbbind(nsp, nam)
55: register struct nspcb *nsp;
56: struct mbuf *nam;
57: {
58: register struct sockaddr_ns *sns;
59: u_short lport = 0;
60:
61: if(nsp->nsp_lport || !ns_nullhost(nsp->nsp_laddr))
62: return (EINVAL);
63: if (nam == 0)
64: goto noname;
65: sns = mtod(nam, struct sockaddr_ns *);
66: if (nam->m_len != sizeof (*sns))
67: return (EINVAL);
68: if (!ns_nullhost(sns->sns_addr)) {
69: int tport = sns->sns_port;
70:
71: sns->sns_port = 0; /* yech... */
72: if (ifa_ifwithaddr((struct sockaddr *)sns) == 0)
73: return (EADDRNOTAVAIL);
74: sns->sns_port = tport;
75: }
76: lport = sns->sns_port;
77: if (lport) {
78: u_short aport = ntohs(lport);
79:
80: if (aport < NSPORT_RESERVED && u.u_uid != 0)
81: return (EACCES);
82: if (ns_pcblookup(&zerons_addr, lport, 0))
83: return (EADDRINUSE);
84: }
85: nsp->nsp_laddr = sns->sns_addr;
86: noname:
87: if (lport == 0)
88: do {
89: if (nspcb.nsp_lport++ < NSPORT_RESERVED)
90: nspcb.nsp_lport = NSPORT_RESERVED;
91: lport = htons(nspcb.nsp_lport);
92: } while (ns_pcblookup(&zerons_addr, lport, 0));
93: nsp->nsp_lport = lport;
94: return (0);
95: }
96:
97: /*
98: * Connect from a socket to a specified address.
99: * Both address and port must be specified in argument sns.
100: * If don't have a local address for this socket yet,
101: * then pick one.
102: */
103: ns_pcbconnect(nsp, nam)
104: struct nspcb *nsp;
105: struct mbuf *nam;
106: {
107: struct ns_ifaddr *ia;
108: register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
109: register struct ns_addr *dst;
110:
111: if (nam->m_len != sizeof (*sns))
112: return (EINVAL);
113: if (sns->sns_family != AF_NS)
114: return (EAFNOSUPPORT);
115: if (sns->sns_port==0 || ns_nullhost(sns->sns_addr))
116: return (EADDRNOTAVAIL);
117: if (ns_nullhost(nsp->nsp_laddr)) {
118: register struct route *ro;
119: struct ifnet *ifp;
120: /*
121: * If route is known or can be allocated now,
122: * our src addr is taken from the i/f, else punt.
123: */
124: ro = &nsp->nsp_route;
125: dst = &satons_addr(ro->ro_dst);
126:
127: ia = (struct ns_ifaddr *)0;
128: if (ro->ro_rt) {
129: if ((!ns_neteq(nsp->nsp_lastdst, sns->sns_addr)) ||
130: ((ifp = ro->ro_rt->rt_ifp) &&
131: (ifp->if_flags & IFF_POINTOPOINT) &&
132: (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr))) ||
133: (nsp->nsp_socket->so_options & SO_DONTROUTE)) {
134: RTFREE(ro->ro_rt);
135: ro->ro_rt = (struct rtentry *)0;
136: }
137: }
138: if ((nsp->nsp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
139: (ro->ro_rt == (struct rtentry *)0 ||
140: ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
141: /* No route yet, so try to acquire one */
142: ro->ro_dst.sa_family = AF_NS;
143: *dst = sns->sns_addr;
144: dst->x_port = 0;
145: rtalloc(ro);
146: }
147: /*
148: * If we found a route, use the address
149: * corresponding to the outgoing interface
150: */
151: if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp))
152: for (ia = ns_ifaddr; ia; ia = ia->ia_next)
153: if (ia->ia_ifp == ifp)
154: break;
155: if (ia == 0) {
156: u_short fport = sns->sns_addr.x_port;
157: sns->sns_addr.x_port = 0;
158: ia = (struct ns_ifaddr *)
159: ifa_ifwithdstaddr((struct sockaddr *)sns);
160: sns->sns_addr.x_port = fport;
161: if (ia == 0)
162: ia = ns_iaonnetof(&sns->sns_addr);
163: if (ia == 0)
164: ia = ns_ifaddr;
165: if (ia == 0)
166: return (EADDRNOTAVAIL);
167: }
168: nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net;
169: nsp->nsp_lastdst = sns->sns_addr;
170: }
171: if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0))
172: return (EADDRINUSE);
173: if (ns_nullhost(nsp->nsp_laddr)) {
174: if (nsp->nsp_lport == 0)
175: (void) ns_pcbbind(nsp, (struct mbuf *)0);
176: nsp->nsp_laddr.x_host = ns_thishost;
177: }
178: nsp->nsp_faddr = sns->sns_addr;
179: /* Includes nsp->nsp_fport = sns->sns_port; */
180: return (0);
181: }
182:
183: ns_pcbdisconnect(nsp)
184: struct nspcb *nsp;
185: {
186:
187: nsp->nsp_faddr = zerons_addr;
188: if (nsp->nsp_socket->so_state & SS_NOFDREF)
189: ns_pcbdetach(nsp);
190: }
191:
192: ns_pcbdetach(nsp)
193: struct nspcb *nsp;
194: {
195: struct socket *so = nsp->nsp_socket;
196:
197: so->so_pcb = 0;
198: sofree(so);
199: if (nsp->nsp_route.ro_rt)
200: rtfree(nsp->nsp_route.ro_rt);
201: remque(nsp);
202: (void) m_free(dtom(nsp));
203: }
204:
205: ns_setsockaddr(nsp, nam)
206: register struct nspcb *nsp;
207: struct mbuf *nam;
208: {
209: register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
210:
211: nam->m_len = sizeof (*sns);
212: sns = mtod(nam, struct sockaddr_ns *);
213: bzero((caddr_t)sns, sizeof (*sns));
214: sns->sns_family = AF_NS;
215: sns->sns_addr = nsp->nsp_laddr;
216: }
217:
218: ns_setpeeraddr(nsp, nam)
219: register struct nspcb *nsp;
220: struct mbuf *nam;
221: {
222: register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
223:
224: nam->m_len = sizeof (*sns);
225: sns = mtod(nam, struct sockaddr_ns *);
226: bzero((caddr_t)sns, sizeof (*sns));
227: sns->sns_family = AF_NS;
228: sns->sns_addr = nsp->nsp_faddr;
229: }
230:
231: /*
232: * Pass some notification to all connections of a protocol
233: * associated with address dst. Call the
234: * protocol specific routine to handle each connection.
235: * Also pass an extra paramter via the nspcb. (which may in fact
236: * be a parameter list!)
237: */
238: ns_pcbnotify(dst, errno, notify, param)
239: register struct ns_addr *dst;
240: long param;
241: int errno, (*notify)();
242: {
243: register struct nspcb *nsp, *oinp;
244: int s = splimp();
245:
246: for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) {
247: if (!ns_hosteq(*dst,nsp->nsp_faddr)) {
248: next:
249: nsp = nsp->nsp_next;
250: continue;
251: }
252: if (nsp->nsp_socket == 0)
253: goto next;
254: if (errno)
255: nsp->nsp_socket->so_error = errno;
256: oinp = nsp;
257: nsp = nsp->nsp_next;
258: oinp->nsp_notify_param = param;
259: (*notify)(oinp);
260: }
261: splx(s);
262: }
263:
264: #ifdef notdef
265: /*
266: * After a routing change, flush old routing
267: * and allocate a (hopefully) better one.
268: */
269: ns_rtchange(nsp)
270: struct nspcb *nsp;
271: {
272: if (nsp->nsp_route.ro_rt) {
273: rtfree(nsp->nsp_route.ro_rt);
274: nsp->nsp_route.ro_rt = 0;
275: /*
276: * A new route can be allocated the next time
277: * output is attempted.
278: */
279: }
280: /* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */
281: }
282: #endif
283:
284: struct nspcb *
285: ns_pcblookup(faddr, lport, wildp)
286: struct ns_addr *faddr;
287: u_short lport;
288: {
289: register struct nspcb *nsp, *match = 0;
290: int matchwild = 3, wildcard;
291: u_short fport;
292:
293: fport = faddr->x_port;
294: for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) {
295: if (nsp->nsp_lport != lport)
296: continue;
297: wildcard = 0;
298: if (ns_nullhost(nsp->nsp_faddr)) {
299: if (!ns_nullhost(*faddr))
300: wildcard++;
301: } else {
302: if (ns_nullhost(*faddr))
303: wildcard++;
304: else {
305: if (!ns_hosteq(nsp->nsp_faddr, *faddr))
306: continue;
307: if( nsp->nsp_fport != fport) {
308: if(nsp->nsp_fport != 0)
309: continue;
310: else
311: wildcard++;
312: }
313: }
314: }
315: if (wildcard && wildp==0)
316: continue;
317: if (wildcard < matchwild) {
318: match = nsp;
319: matchwild = wildcard;
320: if (wildcard == 0)
321: break;
322: }
323: }
324: return (match);
325: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.