mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
336 lines
8.7 KiB
C
336 lines
8.7 KiB
C
/*-
|
|
* Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sysexits.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/uio.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#include "layer.h"
|
|
#include "defs.h"
|
|
#include "mbuf.h"
|
|
#include "log.h"
|
|
#include "timer.h"
|
|
#include "lqr.h"
|
|
#include "hdlc.h"
|
|
#include "throughput.h"
|
|
#include "fsm.h"
|
|
#include "lcp.h"
|
|
#include "ccp.h"
|
|
#include "link.h"
|
|
#include "async.h"
|
|
#include "descriptor.h"
|
|
#include "physical.h"
|
|
#include "main.h"
|
|
#include "udp.h"
|
|
|
|
|
|
#define UDP_CONNECTED 1
|
|
#define UDP_UNCONNECTED 2
|
|
#define UDP_MAYBEUNCONNECTED 3
|
|
|
|
struct udpdevice {
|
|
struct device dev; /* What struct physical knows about */
|
|
struct sockaddr_in sock; /* peer address */
|
|
unsigned connected : 2; /* Have we connect()d ? */
|
|
};
|
|
|
|
#define device2udp(d) ((d)->type == UDP_DEVICE ? (struct udpdevice *)d : NULL)
|
|
|
|
unsigned
|
|
udp_DeviceSize(void)
|
|
{
|
|
return sizeof(struct udpdevice);
|
|
}
|
|
|
|
static ssize_t
|
|
udp_Sendto(struct physical *p, const void *v, size_t n)
|
|
{
|
|
struct udpdevice *dev = device2udp(p->handler);
|
|
int ret;
|
|
|
|
switch (dev->connected) {
|
|
case UDP_CONNECTED:
|
|
ret = write(p->fd, v, n);
|
|
break;
|
|
|
|
case UDP_UNCONNECTED:
|
|
default:
|
|
ret = sendto(p->fd, v, n, 0, (struct sockaddr *)&dev->sock,
|
|
sizeof dev->sock);
|
|
break;
|
|
}
|
|
if (dev->connected == UDP_MAYBEUNCONNECTED) {
|
|
if (ret == -1 && errno == EISCONN) {
|
|
dev->connected = UDP_CONNECTED;
|
|
ret = write(p->fd, v, n);
|
|
} else
|
|
dev->connected = UDP_UNCONNECTED;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t
|
|
udp_Recvfrom(struct physical *p, void *v, size_t n)
|
|
{
|
|
struct udpdevice *dev = device2udp(p->handler);
|
|
int sz, ret;
|
|
|
|
if (dev->connected == UDP_CONNECTED)
|
|
return read(p->fd, v, n);
|
|
|
|
sz = sizeof dev->sock;
|
|
ret = recvfrom(p->fd, v, n, 0, (struct sockaddr *)&dev->sock, &sz);
|
|
|
|
if (*p->name.full == '\0') {
|
|
snprintf(p->name.full, sizeof p->name.full, "%s:%d/udp",
|
|
inet_ntoa(dev->sock.sin_addr), ntohs(dev->sock.sin_port));
|
|
p->name.base = p->name.full;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
udp_Free(struct physical *p)
|
|
{
|
|
struct udpdevice *dev = device2udp(p->handler);
|
|
|
|
free(dev);
|
|
}
|
|
|
|
static void
|
|
udp_device2iov(struct device *d, struct iovec *iov, int *niov,
|
|
int maxiov __unused, int *auxfd __unused, int *nauxfd __unused)
|
|
{
|
|
int sz = physical_MaxDeviceSize();
|
|
|
|
iov[*niov].iov_base = realloc(d, sz);
|
|
if (iov[*niov].iov_base == NULL) {
|
|
log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
|
|
AbortProgram(EX_OSERR);
|
|
}
|
|
iov[*niov].iov_len = sz;
|
|
(*niov)++;
|
|
}
|
|
|
|
static const struct device baseudpdevice = {
|
|
UDP_DEVICE,
|
|
"udp",
|
|
0,
|
|
{ CD_NOTREQUIRED, 0 },
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
udp_Free,
|
|
udp_Recvfrom,
|
|
udp_Sendto,
|
|
udp_device2iov,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
struct device *
|
|
udp_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
|
|
int maxiov __unused, int *auxfd __unused, int *nauxfd __unused)
|
|
{
|
|
if (type == UDP_DEVICE) {
|
|
struct udpdevice *dev = (struct udpdevice *)iov[(*niov)++].iov_base;
|
|
|
|
dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */
|
|
if (dev == NULL) {
|
|
log_Printf(LogALERT, "Failed to allocate memory: %d\n",
|
|
(int)(sizeof *dev));
|
|
AbortProgram(EX_OSERR);
|
|
}
|
|
|
|
/* Refresh function pointers etc */
|
|
memcpy(&dev->dev, &baseudpdevice, sizeof dev->dev);
|
|
|
|
physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNC);
|
|
return &dev->dev;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct udpdevice *
|
|
udp_CreateDevice(struct physical *p, char *host, char *port)
|
|
{
|
|
struct udpdevice *dev;
|
|
struct servent *sp;
|
|
|
|
if ((dev = malloc(sizeof *dev)) == NULL) {
|
|
log_Printf(LogWARN, "%s: Cannot allocate a udp device: %s\n",
|
|
p->link.name, strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
dev->sock.sin_family = AF_INET;
|
|
dev->sock.sin_addr = GetIpAddr(host);
|
|
if (dev->sock.sin_addr.s_addr == INADDR_NONE) {
|
|
log_Printf(LogWARN, "%s: %s: unknown host\n", p->link.name, host);
|
|
free(dev);
|
|
return NULL;
|
|
}
|
|
dev->sock.sin_port = htons(atoi(port));
|
|
if (dev->sock.sin_port == 0) {
|
|
sp = getservbyname(port, "udp");
|
|
if (sp)
|
|
dev->sock.sin_port = sp->s_port;
|
|
else {
|
|
log_Printf(LogWARN, "%s: %s: unknown service\n", p->link.name, port);
|
|
free(dev);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
log_Printf(LogPHASE, "%s: Connecting to %s:%s/udp\n", p->link.name,
|
|
host, port);
|
|
|
|
p->fd = socket(PF_INET, SOCK_DGRAM, 0);
|
|
if (p->fd >= 0) {
|
|
log_Printf(LogDEBUG, "%s: Opened udp socket %s\n", p->link.name,
|
|
p->name.full);
|
|
if (connect(p->fd, (struct sockaddr *)&dev->sock, sizeof dev->sock) == 0) {
|
|
dev->connected = UDP_CONNECTED;
|
|
return dev;
|
|
} else
|
|
log_Printf(LogWARN, "%s: connect: %s\n", p->name.full, strerror(errno));
|
|
} else
|
|
log_Printf(LogWARN, "%s: socket: %s\n", p->name.full, strerror(errno));
|
|
|
|
close(p->fd);
|
|
p->fd = -1;
|
|
free(dev);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct device *
|
|
udp_Create(struct physical *p)
|
|
{
|
|
char *cp, *host, *port, *svc;
|
|
struct udpdevice *dev;
|
|
|
|
dev = NULL;
|
|
if (p->fd < 0) {
|
|
if ((cp = strchr(p->name.full, ':')) != NULL && !strchr(cp + 1, ':')) {
|
|
*cp = '\0';
|
|
host = p->name.full;
|
|
port = cp + 1;
|
|
svc = strchr(port, '/');
|
|
if (svc && strcasecmp(svc, "/udp")) {
|
|
*cp = ':';
|
|
return NULL;
|
|
}
|
|
if (svc) {
|
|
p->fd--; /* We own the device but maybe can't use it - change fd */
|
|
*svc = '\0';
|
|
}
|
|
|
|
if (*host && *port)
|
|
dev = udp_CreateDevice(p, host, port);
|
|
|
|
*cp = ':';
|
|
if (svc)
|
|
*svc = '/';
|
|
}
|
|
} else {
|
|
/* See if we're a connected udp socket */
|
|
struct stat st;
|
|
|
|
if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) {
|
|
int type, sz;
|
|
|
|
sz = sizeof type;
|
|
if (getsockopt(p->fd, SOL_SOCKET, SO_TYPE, &type, &sz) == -1) {
|
|
log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name);
|
|
close(p->fd);
|
|
p->fd = -1;
|
|
return NULL;
|
|
}
|
|
|
|
if (sz == sizeof type && type == SOCK_DGRAM) {
|
|
struct sockaddr_in sock;
|
|
struct sockaddr *sockp = (struct sockaddr *)&sock;
|
|
|
|
if ((dev = malloc(sizeof *dev)) == NULL) {
|
|
log_Printf(LogWARN, "%s: Cannot allocate a udp device: %s\n",
|
|
p->link.name, strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
if (getpeername(p->fd, sockp, &sz) == 0) {
|
|
log_Printf(LogPHASE, "%s: Link is a connected udp socket\n",
|
|
p->link.name);
|
|
dev->connected = UDP_CONNECTED;
|
|
} else {
|
|
log_Printf(LogPHASE, "%s: Link is a disconnected udp socket\n",
|
|
p->link.name);
|
|
|
|
dev->connected = UDP_MAYBEUNCONNECTED;
|
|
|
|
if (p->link.lcp.cfg.openmode != OPEN_PASSIVE) {
|
|
log_Printf(LogPHASE, "%s: Changing openmode to PASSIVE\n",
|
|
p->link.name);
|
|
p->link.lcp.cfg.openmode = OPEN_PASSIVE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dev) {
|
|
memcpy(&dev->dev, &baseudpdevice, sizeof dev->dev);
|
|
physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNC);
|
|
if (p->cfg.cd.necessity != CD_DEFAULT)
|
|
log_Printf(LogWARN, "Carrier settings ignored\n");
|
|
return &dev->dev;
|
|
}
|
|
|
|
return NULL;
|
|
}
|