Commit | Line | Data |
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126472ab | 1 | /* raw_usrreq.c 4.13 82/04/10 */ |
8df9431e BJ |
2 | |
3 | #include "../h/param.h" | |
4 | #include "../h/mbuf.h" | |
94a62155 | 5 | #include "../h/protosw.h" |
8df9431e BJ |
6 | #include "../h/socket.h" |
7 | #include "../h/socketvar.h" | |
8 | #include "../h/mtpr.h" | |
9 | #include "../net/in.h" | |
10 | #include "../net/in_systm.h" | |
11 | #include "../net/if.h" | |
94a62155 | 12 | #include "../net/raw_cb.h" |
126472ab | 13 | #include <errno.h> |
94a62155 | 14 | |
1e977657 BJ |
15 | int rawqmaxlen = IFQ_MAXLEN; |
16 | ||
94a62155 BJ |
17 | /* |
18 | * Initialize raw connection block q. | |
1e977657 | 19 | */ |
94a62155 BJ |
20 | raw_init() |
21 | { | |
1e977657 | 22 | |
94a62155 BJ |
23 | COUNT(RAW_INIT); |
24 | rawcb.rcb_next = rawcb.rcb_prev = &rawcb; | |
1e977657 | 25 | rawintrq.ifq_maxlen = IFQ_MAXLEN; |
94a62155 | 26 | } |
8df9431e BJ |
27 | |
28 | /* | |
29 | * Raw protocol interface. | |
30 | */ | |
126472ab | 31 | raw_input(m0, proto, dst, src) |
94a62155 | 32 | struct mbuf *m0; |
126472ab SL |
33 | struct sockproto *proto; |
34 | struct sockaddr *dst, *src; | |
8df9431e | 35 | { |
94a62155 BJ |
36 | register struct mbuf *m; |
37 | struct raw_header *rh; | |
8df9431e BJ |
38 | int s; |
39 | ||
33406a9e | 40 | COUNT(RAW_INPUT); |
94a62155 BJ |
41 | /* |
42 | * Rip off an mbuf for a generic header. | |
43 | */ | |
44 | m = m_get(M_DONTWAIT); | |
45 | if (m == 0) { | |
46 | m_freem(m0); | |
47 | return; | |
48 | } | |
49 | m->m_next = m0; | |
50 | m->m_off = MMINOFF; | |
51 | m->m_len = sizeof(struct raw_header); | |
52 | rh = mtod(m, struct raw_header *); | |
126472ab SL |
53 | rh->raw_dst = *dst; |
54 | rh->raw_src = *src; | |
55 | rh->raw_proto = *proto; | |
94a62155 BJ |
56 | |
57 | /* | |
58 | * Header now contains enough info to decide | |
59 | * which socket to place packet in (if any). | |
60 | * Queue it up for the raw protocol process | |
61 | * running at software interrupt level. | |
62 | */ | |
8df9431e | 63 | s = splimp(); |
1e977657 BJ |
64 | if (IF_QFULL(&rawintrq)) |
65 | m_freem(m); | |
66 | else | |
67 | IF_ENQUEUE(&rawintrq, m); | |
8df9431e | 68 | splx(s); |
9c8692e9 | 69 | schednetisr(NETISR_RAW); |
8df9431e BJ |
70 | } |
71 | ||
94a62155 BJ |
72 | /* |
73 | * Raw protocol input routine. Process packets entered | |
74 | * into the queue at interrupt time. Find the socket | |
75 | * associated with the packet(s) and move them over. If | |
76 | * nothing exists for this packet, drop it. | |
77 | */ | |
8df9431e BJ |
78 | rawintr() |
79 | { | |
80 | int s; | |
81 | struct mbuf *m; | |
94a62155 | 82 | register struct rawcb *rp; |
126472ab SL |
83 | register struct sockaddr *laddr; |
84 | register struct protosw *lproto; | |
85 | struct raw_header *rh; | |
94a62155 | 86 | struct socket *last; |
8df9431e BJ |
87 | |
88 | COUNT(RAWINTR); | |
89 | next: | |
90 | s = splimp(); | |
8df9431e BJ |
91 | IF_DEQUEUE(&rawintrq, m); |
92 | splx(s); | |
93 | if (m == 0) | |
94 | return; | |
126472ab | 95 | rh = mtod(m, struct raw_header *); |
94a62155 BJ |
96 | |
97 | /* | |
98 | * Find the appropriate socket(s) in which to place this | |
99 | * packet. This is done by matching the protocol and | |
100 | * address information prepended by raw_input against | |
101 | * the info stored in the control block structures. | |
102 | */ | |
103 | last = 0; | |
104 | for (rp = rawcb.rcb_next; rp != &rawcb; rp = rp->rcb_next) { | |
126472ab SL |
105 | lproto = rp->rcb_socket->so_proto; |
106 | if (lproto->pr_family != rh->raw_proto.sp_family) | |
94a62155 | 107 | continue; |
126472ab SL |
108 | if (lproto->pr_protocol && |
109 | lproto->pr_protocol != rh->raw_proto.sp_protocol) | |
110 | continue; | |
111 | laddr = &rp->rcb_laddr; | |
112 | if (laddr->sa_family && | |
113 | laddr->sa_family != rh->raw_dst.sa_family) | |
94a62155 BJ |
114 | continue; |
115 | /* | |
116 | * We assume the lower level routines have | |
117 | * placed the address in a canonical format | |
126472ab | 118 | * suitable for a structure comparison. |
94a62155 | 119 | */ |
126472ab SL |
120 | if ((rp->rcb_flags & RAW_LADDR) && |
121 | bcmp(laddr->sa_data, rh->raw_dst.sa_data, 14) != 0) | |
122 | continue; | |
123 | if ((rp->rcb_flags & RAW_FADDR) && | |
124 | bcmp(rp->rcb_faddr.sa_data, rh->raw_src.sa_data, 14) != 0) | |
94a62155 BJ |
125 | continue; |
126 | /* | |
127 | * To avoid extraneous packet copies, we keep | |
128 | * track of the last socket the packet should be | |
129 | * placed in, and make copies only after finding a | |
130 | * socket which "collides". | |
131 | */ | |
132 | if (last) { | |
133 | struct mbuf *n; | |
134 | ||
668cc26d | 135 | if (n = m_copy(m->m_next, 0, (int)M_COPYALL)) |
94a62155 | 136 | goto nospace; |
126472ab SL |
137 | if (sbappendaddr(&last->so_rcv, &rh->raw_src, n)==0) { |
138 | /* should notify about lost packet */ | |
faad37c0 SL |
139 | m_freem(n); |
140 | goto nospace; | |
141 | } | |
94a62155 BJ |
142 | sorwakeup(last); |
143 | } | |
144 | nospace: | |
126472ab | 145 | last = rp->rcb_socket; |
94a62155 BJ |
146 | } |
147 | if (last == 0) | |
148 | goto drop; | |
126472ab SL |
149 | m = m_free(m); /* header */ |
150 | if (sbappendaddr(&last->so_rcv, &rh->raw_src, m) == 0) | |
faad37c0 | 151 | goto drop; |
94a62155 BJ |
152 | sorwakeup(last); |
153 | goto next; | |
8df9431e BJ |
154 | drop: |
155 | m_freem(m); | |
156 | goto next; | |
157 | } | |
158 | ||
159 | /*ARGSUSED*/ | |
160 | raw_usrreq(so, req, m, addr) | |
161 | struct socket *so; | |
162 | int req; | |
163 | struct mbuf *m; | |
164 | caddr_t addr; | |
165 | { | |
94a62155 BJ |
166 | register struct rawcb *rp = sotorawcb(so); |
167 | int error = 0; | |
8df9431e BJ |
168 | |
169 | COUNT(RAW_USRREQ); | |
94a62155 BJ |
170 | if (rp == 0 && req != PRU_ATTACH) |
171 | return (EINVAL); | |
172 | ||
173 | switch (req) { | |
174 | ||
175 | /* | |
176 | * Allocate a raw control block and fill in the | |
177 | * necessary info to allow packets to be routed to | |
178 | * the appropriate raw interface routine. | |
179 | */ | |
180 | case PRU_ATTACH: | |
1e977657 BJ |
181 | if ((so->so_state & SS_PRIV) == 0) |
182 | return (EPERM); | |
94a62155 | 183 | if (rp) |
1e977657 | 184 | return (EINVAL); |
94a62155 BJ |
185 | error = raw_attach(so, (struct sockaddr *)addr); |
186 | break; | |
187 | ||
188 | /* | |
189 | * Destroy state just before socket deallocation. | |
190 | * Flush data or not depending on the options. | |
191 | */ | |
192 | case PRU_DETACH: | |
193 | if (rp == 0) | |
194 | return (ENOTCONN); | |
195 | raw_detach(rp); | |
196 | break; | |
197 | ||
198 | /* | |
199 | * If a socket isn't bound to a single address, | |
200 | * the raw input routine will hand it anything | |
201 | * within that protocol family (assuming there's | |
202 | * nothing else around it should go to). | |
203 | */ | |
204 | case PRU_CONNECT: | |
126472ab | 205 | if (rp->rcb_flags & RAW_FADDR) |
94a62155 BJ |
206 | return (EISCONN); |
207 | raw_connaddr(rp, (struct sockaddr *)addr); | |
208 | soisconnected(so); | |
209 | break; | |
210 | ||
211 | case PRU_DISCONNECT: | |
126472ab | 212 | if ((rp->rcb_flags & RAW_FADDR) == 0) |
94a62155 BJ |
213 | return (ENOTCONN); |
214 | raw_disconnect(rp); | |
215 | soisdisconnected(so); | |
216 | break; | |
217 | ||
218 | /* | |
219 | * Mark the connection as being incapable of further input. | |
220 | */ | |
221 | case PRU_SHUTDOWN: | |
222 | socantsendmore(so); | |
223 | break; | |
224 | ||
225 | /* | |
226 | * Ship a packet out. The appropriate raw output | |
227 | * routine handles any massaging necessary. | |
228 | */ | |
229 | case PRU_SEND: | |
230 | if (addr) { | |
126472ab | 231 | if (rp->rcb_flags & RAW_FADDR) |
94a62155 BJ |
232 | return (EISCONN); |
233 | raw_connaddr(rp, (struct sockaddr *)addr); | |
126472ab | 234 | } else if ((rp->rcb_flags & RAW_FADDR) == 0) |
94a62155 | 235 | return (ENOTCONN); |
8a2f82db | 236 | error = (*so->so_proto->pr_output)(m, so); |
94a62155 | 237 | if (addr) |
126472ab | 238 | rp->rcb_flags &= ~RAW_FADDR; |
94a62155 BJ |
239 | break; |
240 | ||
241 | case PRU_ABORT: | |
242 | raw_disconnect(rp); | |
243 | sofree(so); | |
244 | soisdisconnected(so); | |
245 | break; | |
246 | ||
247 | /* | |
248 | * Not supported. | |
249 | */ | |
250 | case PRU_ACCEPT: | |
251 | case PRU_RCVD: | |
252 | case PRU_CONTROL: | |
253 | case PRU_SENSE: | |
254 | case PRU_RCVOOB: | |
255 | case PRU_SENDOOB: | |
256 | error = EOPNOTSUPP; | |
257 | break; | |
8df9431e | 258 | |
126472ab SL |
259 | case PRU_SOCKADDR: |
260 | bcopy(addr, (caddr_t)&rp->rcb_laddr, sizeof (struct sockaddr)); | |
261 | break; | |
262 | ||
94a62155 BJ |
263 | default: |
264 | panic("raw_usrreq"); | |
265 | } | |
266 | return (error); | |
8df9431e | 267 | } |