2 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/usr.sbin/ppp/udp.c,v 1.10.2.4 2002/09/01 02:12:32 brian Exp $
27 * $DragonFly: src/usr.sbin/ppp/udp.c,v 1.2 2003/06/17 04:30:01 dillon Exp $
30 #include <sys/types.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33 #include <arpa/inet.h>
53 #include "throughput.h"
59 #include "descriptor.h"
65 #define UDP_CONNECTED 1
66 #define UDP_UNCONNECTED 2
67 #define UDP_MAYBEUNCONNECTED 3
70 struct device dev; /* What struct physical knows about */
71 struct sockaddr_in sock; /* peer address */
72 unsigned connected : 2; /* Have we connect()d ? */
75 #define device2udp(d) ((d)->type == UDP_DEVICE ? (struct udpdevice *)d : NULL)
80 return sizeof(struct udpdevice);
84 udp_Sendto(struct physical *p, const void *v, size_t n)
86 struct udpdevice *dev = device2udp(p->handler);
89 switch (dev->connected) {
91 ret = write(p->fd, v, n);
96 ret = sendto(p->fd, v, n, 0, (struct sockaddr *)&dev->sock,
100 if (dev->connected == UDP_MAYBEUNCONNECTED) {
101 if (ret == -1 && errno == EISCONN) {
102 dev->connected = UDP_CONNECTED;
103 ret = write(p->fd, v, n);
105 dev->connected = UDP_UNCONNECTED;
112 udp_Recvfrom(struct physical *p, void *v, size_t n)
114 struct udpdevice *dev = device2udp(p->handler);
117 if (dev->connected == UDP_CONNECTED)
118 return read(p->fd, v, n);
120 sz = sizeof dev->sock;
121 ret = recvfrom(p->fd, v, n, 0, (struct sockaddr *)&dev->sock, &sz);
123 if (*p->name.full == '\0') {
124 snprintf(p->name.full, sizeof p->name.full, "%s:%d/udp",
125 inet_ntoa(dev->sock.sin_addr), ntohs(dev->sock.sin_port));
126 p->name.base = p->name.full;
133 udp_Free(struct physical *p)
135 struct udpdevice *dev = device2udp(p->handler);
141 udp_device2iov(struct device *d, struct iovec *iov, int *niov,
142 int maxiov, int *auxfd, int *nauxfd)
144 int sz = physical_MaxDeviceSize();
146 iov[*niov].iov_base = realloc(d, sz);
147 if (iov[*niov].iov_base == NULL) {
148 log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
149 AbortProgram(EX_OSERR);
151 iov[*niov].iov_len = sz;
155 static const struct device baseudpdevice = {
159 { CD_NOTREQUIRED, 0 },
177 udp_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
178 int maxiov, int *auxfd, int *nauxfd)
180 if (type == UDP_DEVICE) {
181 struct udpdevice *dev = (struct udpdevice *)iov[(*niov)++].iov_base;
183 dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */
185 log_Printf(LogALERT, "Failed to allocate memory: %d\n",
187 AbortProgram(EX_OSERR);
190 /* Refresh function pointers etc */
191 memcpy(&dev->dev, &baseudpdevice, sizeof dev->dev);
193 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNC);
200 static struct udpdevice *
201 udp_CreateDevice(struct physical *p, char *host, char *port)
203 struct udpdevice *dev;
206 if ((dev = malloc(sizeof *dev)) == NULL) {
207 log_Printf(LogWARN, "%s: Cannot allocate a udp device: %s\n",
208 p->link.name, strerror(errno));
212 dev->sock.sin_family = AF_INET;
213 dev->sock.sin_addr = GetIpAddr(host);
214 if (dev->sock.sin_addr.s_addr == INADDR_NONE) {
215 log_Printf(LogWARN, "%s: %s: unknown host\n", p->link.name, host);
219 dev->sock.sin_port = htons(atoi(port));
220 if (dev->sock.sin_port == 0) {
221 sp = getservbyname(port, "udp");
223 dev->sock.sin_port = sp->s_port;
225 log_Printf(LogWARN, "%s: %s: unknown service\n", p->link.name, port);
231 log_Printf(LogPHASE, "%s: Connecting to %s:%s/udp\n", p->link.name,
234 p->fd = socket(PF_INET, SOCK_DGRAM, 0);
236 log_Printf(LogDEBUG, "%s: Opened udp socket %s\n", p->link.name,
238 if (connect(p->fd, (struct sockaddr *)&dev->sock, sizeof dev->sock) == 0) {
239 dev->connected = UDP_CONNECTED;
242 log_Printf(LogWARN, "%s: connect: %s\n", p->name.full, strerror(errno));
244 log_Printf(LogWARN, "%s: socket: %s\n", p->name.full, strerror(errno));
254 udp_Create(struct physical *p)
256 char *cp, *host, *port, *svc;
257 struct udpdevice *dev;
261 if ((cp = strchr(p->name.full, ':')) != NULL && !strchr(cp + 1, ':')) {
265 svc = strchr(port, '/');
266 if (svc && strcasecmp(svc, "/udp")) {
271 p->fd--; /* We own the device but maybe can't use it - change fd */
276 dev = udp_CreateDevice(p, host, port);
283 /* See if we're a connected udp socket */
286 if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) {
290 if (getsockopt(p->fd, SOL_SOCKET, SO_TYPE, &type, &sz) == -1) {
291 log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name);
297 if (sz == sizeof type && type == SOCK_DGRAM) {
298 struct sockaddr_in sock;
299 struct sockaddr *sockp = (struct sockaddr *)&sock;
301 if ((dev = malloc(sizeof *dev)) == NULL) {
302 log_Printf(LogWARN, "%s: Cannot allocate a udp device: %s\n",
303 p->link.name, strerror(errno));
307 if (getpeername(p->fd, sockp, &sz) == 0) {
308 log_Printf(LogPHASE, "%s: Link is a connected udp socket\n",
310 dev->connected = UDP_CONNECTED;
312 log_Printf(LogPHASE, "%s: Link is a disconnected udp socket\n",
315 dev->connected = UDP_MAYBEUNCONNECTED;
317 if (p->link.lcp.cfg.openmode != OPEN_PASSIVE) {
318 log_Printf(LogPHASE, "%s: Changing openmode to PASSIVE\n",
320 p->link.lcp.cfg.openmode = OPEN_PASSIVE;
328 memcpy(&dev->dev, &baseudpdevice, sizeof dev->dev);
329 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNC);
330 if (p->cfg.cd.necessity != CD_DEFAULT)
331 log_Printf(LogWARN, "Carrier settings ignored\n");