streams.c revision 188697
1139749Simp/*- 243410Snewton * Copyright (c) 1998 Mark Newton 343410Snewton * Copyright (c) 1994 Christos Zoulas 443410Snewton * Copyright (c) 1997 Todd Vierling 543410Snewton * All rights reserved. 643410Snewton * 743410Snewton * Redistribution and use in source and binary forms, with or without 843410Snewton * modification, are permitted provided that the following conditions 943410Snewton * are met: 1043410Snewton * 1. Redistributions of source code must retain the above copyright 1143410Snewton * notice, this list of conditions and the following disclaimer. 1243410Snewton * 2. Redistributions in binary form must reproduce the above copyright 1343410Snewton * notice, this list of conditions and the following disclaimer in the 1443410Snewton * documentation and/or other materials provided with the distribution. 1543410Snewton * 3. The names of the authors may not be used to endorse or promote products 1643410Snewton * derived from this software without specific prior written permission 1743410Snewton * 1843410Snewton * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1943410Snewton * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2043410Snewton * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2143410Snewton * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2243410Snewton * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2343410Snewton * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2443410Snewton * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2543410Snewton * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2643410Snewton * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2743410Snewton * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2843410Snewton * 2943410Snewton * Stolen from NetBSD /sys/compat/svr4/svr4_net.c. Pseudo-device driver 3043410Snewton * skeleton produced from /usr/share/examples/drivers/make_pseudo_driver.sh 3143410Snewton * in 3.0-980524-SNAP then hacked a bit (but probably not enough :-). 3249263Snewton * 3343410Snewton */ 3443410Snewton 35119420Sobrien#include <sys/cdefs.h> 36119420Sobrien__FBSDID("$FreeBSD: head/sys/dev/streams/streams.c 188697 2009-02-16 20:12:28Z ed $"); 37119420Sobrien 3843410Snewton#include <sys/param.h> 3943410Snewton#include <sys/systm.h> 4043410Snewton#include <sys/kernel.h> /* SYSINIT stuff */ 4143410Snewton#include <sys/conf.h> /* cdevsw stuff */ 4243410Snewton#include <sys/malloc.h> /* malloc region definitions */ 4343410Snewton#include <sys/file.h> 4443410Snewton#include <sys/filedesc.h> 4543410Snewton#include <sys/unistd.h> 4643410Snewton#include <sys/fcntl.h> 4743410Snewton#include <sys/socket.h> 4843410Snewton#include <sys/protosw.h> 4943410Snewton#include <sys/socketvar.h> 50141466Sjhb#include <sys/syscallsubr.h> 5143410Snewton#include <sys/un.h> 5243410Snewton#include <sys/domain.h> 5343410Snewton#include <net/if.h> 5443410Snewton#include <netinet/in.h> 5543410Snewton#include <sys/proc.h> 5643410Snewton#include <sys/uio.h> 5743410Snewton 5843410Snewton#include <sys/sysproto.h> 5943410Snewton 6065314Sobrien#include <compat/svr4/svr4_types.h> 6165314Sobrien#include <compat/svr4/svr4_util.h> 6265314Sobrien#include <compat/svr4/svr4_signal.h> 6365314Sobrien#include <compat/svr4/svr4_ioctl.h> 6465314Sobrien#include <compat/svr4/svr4_stropts.h> 6565314Sobrien#include <compat/svr4/svr4_socket.h> 6643410Snewton 6792739Salfredstatic int svr4_soo_close(struct file *, struct thread *); 6892739Salfredstatic int svr4_ptm_alloc(struct thread *); 6943410Snewtonstatic d_open_t streamsopen; 7043410Snewton 7143410Snewton/* 7243410Snewton * Device minor numbers 7343410Snewton */ 7443410Snewtonenum { 7543410Snewton dev_ptm = 10, 7643410Snewton dev_arp = 26, 7743410Snewton dev_icmp = 27, 7843410Snewton dev_ip = 28, 7943410Snewton dev_tcp = 35, 8043410Snewton dev_udp = 36, 8143410Snewton dev_rawip = 37, 8243410Snewton dev_unix_dgram = 38, 8343410Snewton dev_unix_stream = 39, 8443410Snewton dev_unix_ord_stream = 40 8543410Snewton}; 8643410Snewton 87160508Sjhbstatic struct cdev *dt_ptm, *dt_arp, *dt_icmp, *dt_ip, *dt_tcp, *dt_udp, 88160508Sjhb *dt_rawip, *dt_unix_dgram, *dt_unix_stream, *dt_unix_ord_stream; 8952114Snewton 9043410Snewtonstatic struct fileops svr4_netops = { 91116546Sphk .fo_read = soo_read, 92116546Sphk .fo_write = soo_write, 93175140Sjhb .fo_truncate = soo_truncate, 94116546Sphk .fo_ioctl = soo_ioctl, 95116546Sphk .fo_poll = soo_poll, 96116546Sphk .fo_kqfilter = soo_kqfilter, 97116546Sphk .fo_stat = soo_stat, 98116546Sphk .fo_close = svr4_soo_close 9943410Snewton}; 10043410Snewton 10143410Snewtonstatic struct cdevsw streams_cdevsw = { 102126080Sphk .d_version = D_VERSION, 103111815Sphk .d_open = streamsopen, 104111815Sphk .d_name = "streams", 10547625Sphk}; 10643410Snewton 10743410Snewtonstruct streams_softc { 10843410Snewton struct isa_device *dev; 10943410Snewton} ; 11043410Snewton 111183397Sed#define UNIT(dev) dev2unit(dev) /* assume one minor number per unit */ 11243410Snewton 11343410Snewtontypedef struct streams_softc *sc_p; 11443410Snewton 11544208Snewtonstatic int 11644208Snewtonstreams_modevent(module_t mod, int type, void *unused) 11744208Snewton{ 11844208Snewton switch (type) { 11944208Snewton case MOD_LOAD: 12052114Snewton dt_ptm = make_dev(&streams_cdevsw, dev_ptm, 0, 0, 0666, 12152114Snewton "ptm"); 12252114Snewton dt_arp = make_dev(&streams_cdevsw, dev_arp, 0, 0, 0666, 12352114Snewton "arp"); 12452114Snewton dt_icmp = make_dev(&streams_cdevsw, dev_icmp, 0, 0, 0666, 12552114Snewton "icmp"); 12652114Snewton dt_ip = make_dev(&streams_cdevsw, dev_ip, 0, 0, 0666, 12752114Snewton "ip"); 12852114Snewton dt_tcp = make_dev(&streams_cdevsw, dev_tcp, 0, 0, 0666, 12952114Snewton "tcp"); 13052114Snewton dt_udp = make_dev(&streams_cdevsw, dev_udp, 0, 0, 0666, 13152114Snewton "udp"); 13252114Snewton dt_rawip = make_dev(&streams_cdevsw, dev_rawip, 0, 0, 0666, 13352114Snewton "rawip"); 13452114Snewton dt_unix_dgram = make_dev(&streams_cdevsw, dev_unix_dgram, 13552114Snewton 0, 0, 0666, "ticlts"); 13652114Snewton dt_unix_stream = make_dev(&streams_cdevsw, dev_unix_stream, 13752114Snewton 0, 0, 0666, "ticots"); 13852114Snewton dt_unix_ord_stream = make_dev(&streams_cdevsw, 13952114Snewton dev_unix_ord_stream, 0, 0, 0666, "ticotsord"); 14052114Snewton 14152114Snewton if (! (dt_ptm && dt_arp && dt_icmp && dt_ip && dt_tcp && 14252114Snewton dt_udp && dt_rawip && dt_unix_dgram && 14352114Snewton dt_unix_stream && dt_unix_ord_stream)) { 14452114Snewton printf("WARNING: device config for STREAMS failed\n"); 14552114Snewton printf("Suggest unloading streams KLD\n"); 14652114Snewton } 14744208Snewton return 0; 14844208Snewton case MOD_UNLOAD: 14949344Snewton /* XXX should check to see if it's busy first */ 15053000Sphk destroy_dev(dt_ptm); 15153000Sphk destroy_dev(dt_arp); 15253000Sphk destroy_dev(dt_icmp); 15353000Sphk destroy_dev(dt_ip); 15453000Sphk destroy_dev(dt_tcp); 15553000Sphk destroy_dev(dt_udp); 15653000Sphk destroy_dev(dt_rawip); 15753000Sphk destroy_dev(dt_unix_dgram); 15853000Sphk destroy_dev(dt_unix_stream); 15953000Sphk destroy_dev(dt_unix_ord_stream); 16052114Snewton 16144208Snewton return 0; 16244208Snewton default: 163132199Sphk return EOPNOTSUPP; 16444208Snewton break; 16544208Snewton } 16644208Snewton return 0; 16744208Snewton} 16844208Snewton 16944208Snewtonstatic moduledata_t streams_mod = { 17044208Snewton "streams", 17144208Snewton streams_modevent, 17244208Snewton 0 17344208Snewton}; 17444208SnewtonDECLARE_MODULE(streams, streams_mod, SI_SUB_DRIVERS, SI_ORDER_ANY); 17560060SgreenMODULE_VERSION(streams, 1); 17644208Snewton 17743410Snewton/* 17843410Snewton * We only need open() and close() routines. open() calls socreate() 17943410Snewton * to allocate a "real" object behind the stream and mallocs some state 18043410Snewton * info for use by the svr4 emulator; close() deallocates the state 18143410Snewton * information and passes the underlying object to the normal socket close 18243410Snewton * routine. 18343410Snewton */ 18443410Snewtonstatic int 185130585Sphkstreamsopen(struct cdev *dev, int oflags, int devtype, struct thread *td) 18643410Snewton{ 187160558Sjhb struct filedesc *fdp; 188160558Sjhb struct svr4_strm *st; 189160558Sjhb struct socket *so; 19043410Snewton struct file *fp; 191160558Sjhb int family, type, protocol; 192160558Sjhb int error, fd; 19343410Snewton 194160490Sjhb if (td->td_dupfd >= 0) 19543410Snewton return ENODEV; 19643410Snewton 197183397Sed switch (dev2unit(dev)) { 19843410Snewton case dev_udp: 19943410Snewton family = AF_INET; 20043410Snewton type = SOCK_DGRAM; 20143410Snewton protocol = IPPROTO_UDP; 20243410Snewton break; 20343410Snewton 20443410Snewton case dev_tcp: 20543410Snewton family = AF_INET; 20643410Snewton type = SOCK_STREAM; 20743410Snewton protocol = IPPROTO_TCP; 20843410Snewton break; 20943410Snewton 21043410Snewton case dev_ip: 21143410Snewton case dev_rawip: 21243410Snewton family = AF_INET; 21343410Snewton type = SOCK_RAW; 21443410Snewton protocol = IPPROTO_IP; 21543410Snewton break; 21643410Snewton 21743410Snewton case dev_icmp: 21843410Snewton family = AF_INET; 21943410Snewton type = SOCK_RAW; 22043410Snewton protocol = IPPROTO_ICMP; 22143410Snewton break; 22243410Snewton 22343410Snewton case dev_unix_dgram: 22443410Snewton family = AF_LOCAL; 22543410Snewton type = SOCK_DGRAM; 22643410Snewton protocol = 0; 22743410Snewton break; 22843410Snewton 22943410Snewton case dev_unix_stream: 23043410Snewton case dev_unix_ord_stream: 23143410Snewton family = AF_LOCAL; 23243410Snewton type = SOCK_STREAM; 23343410Snewton protocol = 0; 23443410Snewton break; 23543410Snewton 23643410Snewton case dev_ptm: 23783366Sjulian return svr4_ptm_alloc(td); 23843410Snewton 23943410Snewton default: 24043410Snewton return EOPNOTSUPP; 24143410Snewton } 24243410Snewton 243160558Sjhb fdp = td->td_proc->p_fd; 24483366Sjulian if ((error = falloc(td, &fp, &fd)) != 0) 24543410Snewton return error; 246121256Sdwmalone /* An extra reference on `fp' has been held for us by falloc(). */ 24743410Snewton 248160558Sjhb error = socreate(family, &so, type, protocol, td->td_ucred, td); 249160558Sjhb if (error) { 250160558Sjhb fdclose(fdp, fp, fd, td); 251160558Sjhb fdrop(fp, td); 252160558Sjhb return error; 25343410Snewton } 25443410Snewton 255174988Sjeff finit(fp, FREAD | FWRITE, DTYPE_SOCKET, so, &svr4_netops); 25643410Snewton 257160558Sjhb /* 258160558Sjhb * Allocate a stream structure and attach it to this socket. 259160558Sjhb * We don't bother locking so_emuldata for SVR4 stream sockets as 260160558Sjhb * its value is constant for the lifetime of the stream once it 261160558Sjhb * is initialized here. 262160558Sjhb */ 263160558Sjhb st = malloc(sizeof(struct svr4_strm), M_TEMP, M_WAITOK); 264160558Sjhb st->s_family = so->so_proto->pr_domain->dom_family; 265160558Sjhb st->s_cmd = ~0; 266160558Sjhb st->s_afd = -1; 267160558Sjhb st->s_eventmask = 0; 268160558Sjhb so->so_emuldata = st; 269160558Sjhb 270121256Sdwmalone fdrop(fp, td); 27183366Sjulian td->td_dupfd = fd; 27243410Snewton return ENXIO; 27343410Snewton} 27443410Snewton 27543410Snewtonstatic int 27683366Sjuliansvr4_ptm_alloc(td) 27783366Sjulian struct thread *td; 27843410Snewton{ 27943410Snewton /* 28043410Snewton * XXX this is very, very ugly. But I can't find a better 28143410Snewton * way that won't duplicate a big amount of code from 28243410Snewton * sys_open(). Ho hum... 28343410Snewton * 28443410Snewton * Fortunately for us, Solaris (at least 2.5.1) makes the 28543410Snewton * /dev/ptmx open automatically just open a pty, that (after 28643410Snewton * STREAMS I_PUSHes), is just a plain pty. fstat() is used 28743410Snewton * to get the minor device number to map to a tty. 28843410Snewton * 28943410Snewton * Cycle through the names. If sys_open() returns ENOENT (or 29043410Snewton * ENXIO), short circuit the cycle and exit. 291188697Sed * 292188697Sed * XXX: Maybe this can now be implemented by posix_openpt()? 29343410Snewton */ 29443410Snewton static char ptyname[] = "/dev/ptyXX"; 29543410Snewton static char ttyletters[] = "pqrstuwxyzPQRST"; 29643410Snewton static char ttynumbers[] = "0123456789abcdef"; 297141466Sjhb struct proc *p; 298141466Sjhb register_t fd; 299141466Sjhb int error, l, n; 30043410Snewton 301141466Sjhb fd = -1; 302141466Sjhb n = 0; 303141466Sjhb l = 0; 304141466Sjhb p = td->td_proc; 30543410Snewton while (fd == -1) { 30643410Snewton ptyname[8] = ttyletters[l]; 30743410Snewton ptyname[9] = ttynumbers[n]; 30843410Snewton 309141466Sjhb error = kern_open(td, ptyname, UIO_SYSSPACE, O_RDWR, 0); 310141466Sjhb switch (error) { 31143410Snewton case ENOENT: 31243410Snewton case ENXIO: 31343410Snewton return error; 31443410Snewton case 0: 31583366Sjulian td->td_dupfd = td->td_retval[0]; 31643410Snewton return ENXIO; 31743410Snewton default: 31843410Snewton if (ttynumbers[++n] == '\0') { 31943410Snewton if (ttyletters[++l] == '\0') 32043410Snewton break; 32143410Snewton n = 0; 32243410Snewton } 32343410Snewton } 32443410Snewton } 32543410Snewton return ENOENT; 32643410Snewton} 32743410Snewton 32843410Snewton 32943410Snewtonstruct svr4_strm * 33043410Snewtonsvr4_stream_get(fp) 33143410Snewton struct file *fp; 33243410Snewton{ 33343410Snewton struct socket *so; 33443410Snewton 33543410Snewton if (fp == NULL || fp->f_type != DTYPE_SOCKET) 33643410Snewton return NULL; 33743410Snewton 338109153Sdillon so = fp->f_data; 339160558Sjhb return so->so_emuldata; 34043410Snewton} 34143410Snewton 34243410Snewtonstatic int 34383366Sjuliansvr4_soo_close(struct file *fp, struct thread *td) 34443410Snewton{ 345109153Sdillon struct socket *so = fp->f_data; 34643410Snewton 34743410Snewton /* CHECKUNIT_DIAG(ENXIO);*/ 34843410Snewton 34983366Sjulian svr4_delete_socket(td->td_proc, fp); 35043410Snewton free(so->so_emuldata, M_TEMP); 35183366Sjulian return soo_close(fp, td); 35243410Snewton} 353