plan 9 kernel history: overview | file list | diff list

1999/0302/ip/gre.c (diff list | history)

1997/0327/sys/src/9/ip/gre.c:73,81 – 1997/0403/sys/src/9/ip/gre.c:73,83 (short | long)
1997/0327    
	} 
	unlock(p); 
 
	Fsconnected(&fs, c, err);
1997/0403    
	if(err != nil) 
		return err; 
	Fsconnected(&fs, c, nil);
1997/0327    
 
	return err;
1997/0403    
	return nil;
1997/0327    
} 
 
static int
1997/0327/sys/src/9/ip/gre.c:93,102 – 1997/0403/sys/src/9/ip/gre.c:95,104
1997/0327    
	c->wq = qopen(64*1024, 0, 0, 0); 
} 
 
static void 
greannounce(Conv *c)
1997/0403    
static char* 
greannounce(Conv*, char**, int)
1997/0327    
{ 
	Fsconnected(&fs, c, "pktifc does not support announce");
1997/0403    
	return "pktifc does not support announce";
1997/0327    
} 
 
static void
1997/0403/sys/src/9/ip/gre.c:163,169 – 1997/0423/sys/src/9/ip/gre.c:163,169 (short | long)
1997/0327    
} 
 
static void 
greiput(Block *bp)
1997/0423    
greiput(Media *m, Block *bp)
1997/0327    
{ 
	int len; 
	GREhdr *ghp;
1997/0403/sys/src/9/ip/gre.c:171,176 – 1997/0423/sys/src/9/ip/gre.c:171,177
1997/0327    
	Conv *c, **p; 
	ushort eproto;
1997/0423    
	USED(m);
1997/0327    
	ghp = (GREhdr*)(bp->rp); 
 
	eproto = nhgets(ghp->eproto);
1997/0423/sys/src/9/ip/gre.c:158,163 – 1997/0522/sys/src/9/ip/gre.c:158,165 (short | long)
1997/0327    
	hnputl(ghp->dst, c->raddr); 
	hnputl(ghp->src, c->laddr); 
	hnputs(ghp->eproto, c->rport);
1997/0522    
	ghp->frag[0] = 0; 
	ghp->frag[1] = 0;
1997/0327    
 
	ipoput(bp, 0, c->ttl); 
}
1997/0522/sys/src/9/ip/gre.c:121,128 – 1997/0524/sys/src/9/ip/gre.c:121,127 (short | long)
1997/0327    
grekick(Conv *c, int l) 
{ 
	GREhdr *ghp; 
	Block *bp, *f; 
	int dlen;
1997/0524    
	Block *bp;
1997/0327    
 
	USED(l);
1997/0522/sys/src/9/ip/gre.c:129,146 – 1997/0524/sys/src/9/ip/gre.c:128,133
1997/0327    
	bp = qget(c->wq); 
	if(bp == nil) 
		return; 
                 
	/* Round packet up to even number of bytes */ 
	dlen = blocklen(bp); 
	if(dlen & 1) { 
		for(f = bp; f->next; f = f->next) 
			; 
		if(f->wp >= f->lim) { 
			f->next = allocb(1); 
			f = f->next; 
		} 
		*f->wp++ = 0; 
	} 
 
	/* Make space to fit ip header (gre header already there) */ 
	bp = padblock(bp, GRE_IPHDRSIZE);
1997/0524/sys/src/9/ip/gre.c:11,18 – 1997/0530/sys/src/9/ip/gre.c:11,18 (short | long)
1997/0327    
 
enum 
{ 
	GRE_IPHDRSIZE	= 20,		/* size of ip header */ 
	GRE_HDRSIZE	= 4,		/* minimum size of GRE header */
1997/0530    
	GRE_IPONLY	= 12,		/* size of ip header */ 
	GRE_IPPLUSGRE	= 12,		/* minimum size of GRE header */
1997/0327    
	IP_GREPROTO	= 47, 
 
	GRErxms		= 200,
1997/0524/sys/src/9/ip/gre.c:122,127 – 1997/0530/sys/src/9/ip/gre.c:122,128
1997/0327    
{ 
	GREhdr *ghp;
1997/0524    
	Block *bp;
1997/0530    
	ulong raddr, laddr;
1997/0327    
 
	USED(l);
1997/0524/sys/src/9/ip/gre.c:130,149 – 1997/0530/sys/src/9/ip/gre.c:131,157
1997/0327    
		return; 
 
	/* Make space to fit ip header (gre header already there) */ 
	bp = padblock(bp, GRE_IPHDRSIZE);
1997/0530    
	bp = padblock(bp, GRE_IPONLY);
1997/0327    
	if(bp == nil) 
		return; 
 
	/* make sure the message has a GRE header */ 
	bp = pullupblock(bp, GRE_IPHDRSIZE+GRE_HDRSIZE);
1997/0530    
	bp = pullupblock(bp, GRE_IPONLY+GRE_IPPLUSGRE);
1997/0327    
	if(bp == nil) 
		return; 
 
	ghp = (GREhdr *)(bp->rp);
1997/0530    
	raddr = nhgetl(ghp->src); 
	laddr = nhgetl(ghp->dst); 
	if(raddr == 0) 
		raddr = c->raddr; 
	if(laddr == 0 || Mediaforme(ghp->dst) <= 0) 
		laddr = c->laddr;
1997/0327    
	ghp->proto = IP_GREPROTO; 
	hnputl(ghp->dst, c->raddr); 
	hnputl(ghp->src, c->laddr);
1997/0530    
	hnputl(ghp->dst, raddr); 
	hnputl(ghp->src, laddr);
1997/0327    
	hnputs(ghp->eproto, c->rport);
1997/0522    
	ghp->frag[0] = 0; 
	ghp->frag[1] = 0;
1997/0524/sys/src/9/ip/gre.c:184,195 – 1997/0530/sys/src/9/ip/gre.c:192,203
1997/0327    
	/* 
	 * Trim the packet down to data size 
	 */ 
	len = nhgets(ghp->len) - GRE_IPHDRSIZE; 
	if(len < GRE_HDRSIZE){
1997/0530    
	len = nhgets(ghp->len) - GRE_IPONLY; 
	if(len < GRE_IPPLUSGRE){
1997/0327    
		freeblist(bp); 
		return; 
	} 
	bp = trimblock(bp, GRE_IPHDRSIZE, len);
1997/0530    
	bp = trimblock(bp, GRE_IPONLY, len);
1997/0327    
	if(bp == nil){ 
		gre.lenerr++; 
		return;
1997/0530/sys/src/9/ip/gre.c:142,152 – 1997/0531/sys/src/9/ip/gre.c:142,152 (short | long)
1997/0327    
 
	ghp = (GREhdr *)(bp->rp);
1997/0530    
	raddr = nhgetl(ghp->src); 
	laddr = nhgetl(ghp->dst);
1997/0531    
	raddr = nhgetl(ghp->dst); 
	laddr = nhgetl(ghp->src);
1997/0530    
	if(raddr == 0) 
		raddr = c->raddr; 
	if(laddr == 0 || Mediaforme(ghp->dst) <= 0)
1997/0531    
	if(laddr == 0 || Mediaforme(ghp->src) <= 0)
1997/0530    
		laddr = c->laddr;
1997/0327    
	ghp->proto = IP_GREPROTO;
1997/0531/sys/src/9/ip/gre.c:23,42 – 1998/0306/sys/src/9/ip/gre.c:23,42 (short | long)
1997/0327    
typedef struct GREhdr 
{ 
	/* ip header */ 
	byte	vihl;		/* Version and header length */ 
	byte	tos;		/* Type of service */ 
	byte	len[2];		/* packet length (including headers) */ 
	byte	id[2];		/* Identification */ 
	byte	frag[2];	/* Fragment information */ 
	byte	Unused;	 
	byte	proto;		/* Protocol */ 
	byte	cksum[2];	/* checksum */ 
	byte	src[4];		/* Ip source */ 
	byte	dst[4];		/* Ip destination */
1998/0306    
	uchar	vihl;		/* Version and header length */ 
	uchar	tos;		/* Type of service */ 
	uchar	len[2];		/* packet length (including headers) */ 
	uchar	id[2];		/* Identification */ 
	uchar	frag[2];	/* Fragment information */ 
	uchar	Unused;	 
	uchar	proto;		/* Protocol */ 
	uchar	cksum[2];	/* checksum */ 
	uchar	src[4];		/* Ip source */ 
	uchar	dst[4];		/* Ip destination */
1997/0327    
 
	/* gre header */ 
	byte	flags[2]; 
	byte	eproto[2];	/* encapsulation protocol */
1998/0306    
	uchar	flags[2]; 
	uchar	eproto[2];	/* encapsulation protocol */
1997/0327    
} GREhdr; 
 
	Proto	gre;
1997/0531/sys/src/9/ip/gre.c:56,62 – 1998/0306/sys/src/9/ip/gre.c:56,62
1997/0327    
 
	/* make sure noone's already connected to this other sys */ 
	p = c->p; 
	lock(p);
1998/0306    
	qlock(p);
1997/0327    
	ecp = &p->conv[p->nc]; 
	for(cp = p->conv; cp < ecp; cp++){ 
		tc = *cp;
1997/0531/sys/src/9/ip/gre.c:66,77 – 1998/0306/sys/src/9/ip/gre.c:66,77
1997/0327    
			continue; 
		if(tc->rport == c->rport && tc->raddr == c->raddr){ 
			err = "already connected to that addr/proto"; 
			c->rport = 0; 
			c->raddr = 0;
1998/0306    
			ipmove(c->laddr, IPnoaddr); 
			ipmove(c->raddr, IPnoaddr);
1997/0327    
			break; 
		} 
	} 
	unlock(p);
1998/0306    
	qunlock(p);
1997/0327    
1997/0403    
	if(err != nil) 
		return err;
1997/0531/sys/src/9/ip/gre.c:81,91 – 1998/0306/sys/src/9/ip/gre.c:81,90
1997/0327    
} 
 
static int 
grestate(char **msg, Conv *c)
1998/0306    
grestate(Conv *c, char *state, int n)
1997/0327    
{ 
	USED(c); 
	*msg = "Datagram"; 
	return 1;
1998/0306    
	return snprint(state, n, "%s", "Datagram");
1997/0327    
} 
 
static void
1997/0531/sys/src/9/ip/gre.c:107,114 – 1998/0306/sys/src/9/ip/gre.c:106,113
1997/0327    
	qclose(c->rq); 
	qclose(c->wq); 
	qclose(c->eq); 
	c->laddr = 0; 
	c->raddr = 0;
1998/0306    
	ipmove(c->laddr, IPnoaddr); 
	ipmove(c->raddr, IPnoaddr);
1997/0327    
	c->lport = 0; 
	c->rport = 0;
1997/0531/sys/src/9/ip/gre.c:122,128 – 1998/0306/sys/src/9/ip/gre.c:121,127
1997/0327    
{ 
	GREhdr *ghp;
1997/0524    
	Block *bp;
1997/0530    
	ulong raddr, laddr;
1998/0306    
	uchar laddr[IPaddrlen], raddr[IPaddrlen];
1997/0327    
 
	USED(l);
1997/0531/sys/src/9/ip/gre.c:142,157 – 1998/0306/sys/src/9/ip/gre.c:141,157
1997/0327    
 
	ghp = (GREhdr *)(bp->rp);
1997/0531    
	raddr = nhgetl(ghp->dst); 
	laddr = nhgetl(ghp->src);
1997/0530    
	if(raddr == 0) 
		raddr = c->raddr;
1997/0531    
	if(laddr == 0 || Mediaforme(ghp->src) <= 0)
1997/0530    
		laddr = c->laddr;
1998/0306    
	v4tov6(raddr, ghp->dst); 
	if(ipcmp(raddr, v4prefix) == 0) 
		memmove(ghp->dst, c->raddr + IPv4off, IPv4addrlen); 
	v4tov6(laddr, ghp->src); 
	if(ipcmp(laddr, v4prefix) == 0){ 
		if(ipcmp(c->laddr, IPnoaddr) == 0) 
			findlocalip(c->laddr, raddr); /* pick interface closest to dest */ 
		memmove(ghp->src, c->laddr + IPv4off, IPv4addrlen); 
	}
1997/0530    
1997/0327    
	ghp->proto = IP_GREPROTO;
1997/0530    
	hnputl(ghp->dst, raddr); 
	hnputl(ghp->src, laddr);
1997/0327    
	hnputs(ghp->eproto, c->rport);
1997/0522    
	ghp->frag[0] = 0; 
	ghp->frag[1] = 0;
1997/0531/sys/src/9/ip/gre.c:160,178 – 1998/0306/sys/src/9/ip/gre.c:160,177
1997/0327    
} 
 
static void
1997/0423    
greiput(Media *m, Block *bp)
1998/0306    
greiput(uchar*, Block *bp)
1997/0327    
{ 
	int len; 
	GREhdr *ghp; 
	Ipaddr addr; 
	Conv *c, **p; 
	ushort eproto;
1998/0306    
	uchar raddr[IPaddrlen];
1997/0327    
1997/0423    
	USED(m);
1997/0327    
	ghp = (GREhdr*)(bp->rp);
1998/0306    
	v4tov6(raddr, ghp->src);
1997/0327    
	eproto = nhgets(ghp->eproto); 
	addr = nhgetl(ghp->src); 
 
	/* Look for a conversation structure for this port and address */ 
	c = nil;
1997/0531/sys/src/9/ip/gre.c:180,186 – 1998/0306/sys/src/9/ip/gre.c:179,185
1997/0327    
		c = *p; 
		if(c->inuse == 0) 
			continue; 
		if(c->raddr == addr && c->rport == eproto)
1998/0306    
		if(c->rport == eproto && ipcmp(c->raddr, raddr) == 0)
1997/0327    
			break; 
	}
1997/0531/sys/src/9/ip/gre.c:216,221 – 1998/0306/sys/src/9/ip/gre.c:215,228
1997/0327    
	} 
}
1998/0306    
int 
grestats(char *buf, int len) 
{ 
	return snprint(buf, len, 
		"gre: csum %d hlen %d len %d order %d rexmit %d\n", 
		gre.csumerr, gre.hlenerr, gre.lenerr, gre.order, gre.rexmit); 
}
1997/0327    
void 
greinit(Fs *fs) 
{
1997/0531/sys/src/9/ip/gre.c:229,234 – 1998/0306/sys/src/9/ip/gre.c:236,242
1997/0327    
	gre.rcv = greiput; 
	gre.ctl = nil; 
	gre.advise = nil;
1998/0306    
	gre.stats = grestats;
1997/0327    
	gre.ipproto = IP_GREPROTO; 
	gre.nc = 64; 
	gre.ptclsize = 0;
1998/0306/sys/src/9/ip/gre.c:39,47 – 1998/0313/sys/src/9/ip/gre.c:39,51 (short | long)
1998/0306    
	uchar	eproto[2];	/* encapsulation protocol */
1997/0327    
} GREhdr; 
 
	Proto	gre; 
extern	Fs	fs; 
	int	gredebug;
1998/0313    
typedef struct GREpriv GREpriv; 
struct GREpriv 
{ 
	/* non-MIB stats */ 
	ulong		csumerr;		/* checksum errors */ 
	ulong		lenerr;			/* short packet */ 
};
1997/0327    
 
static char* 
greconnect(Conv *c, char **argv, int argc)
1998/0306/sys/src/9/ip/gre.c:75,81 – 1998/0313/sys/src/9/ip/gre.c:79,85
1997/0327    
1997/0403    
	if(err != nil) 
		return err; 
	Fsconnected(&fs, c, nil);
1998/0313    
	Fsconnected(c, nil);
1997/0327    
1997/0403    
	return nil;
1997/0327    
}
1998/0306/sys/src/9/ip/gre.c:147,153 – 1998/0313/sys/src/9/ip/gre.c:151,157
1998/0306    
	v4tov6(laddr, ghp->src); 
	if(ipcmp(laddr, v4prefix) == 0){ 
		if(ipcmp(c->laddr, IPnoaddr) == 0) 
			findlocalip(c->laddr, raddr); /* pick interface closest to dest */
1998/0313    
			findlocalip(c->p->f, c->laddr, raddr); /* pick interface closest to dest */
1998/0306    
		memmove(ghp->src, c->laddr + IPv4off, IPv4addrlen); 
	}
1997/0530    
1998/0306/sys/src/9/ip/gre.c:156,166 – 1998/0313/sys/src/9/ip/gre.c:160,170
1997/0522    
	ghp->frag[0] = 0; 
	ghp->frag[1] = 0;
1997/0327    
 
	ipoput(bp, 0, c->ttl);
1998/0313    
	ipoput(c->p->f, bp, 0, c->ttl);
1997/0327    
} 
 
static void
1998/0306    
greiput(uchar*, Block *bp)
1998/0313    
greiput(Proto *gre, uchar*, Block *bp)
1997/0327    
{ 
	int len; 
	GREhdr *ghp;
1998/0306/sys/src/9/ip/gre.c:167,173 – 1998/0313/sys/src/9/ip/gre.c:171,179
1997/0327    
	Conv *c, **p; 
	ushort eproto;
1998/0306    
	uchar raddr[IPaddrlen];
1998/0313    
	GREpriv *gpriv;
1997/0327    
1998/0313    
	gpriv = gre->priv;
1997/0327    
	ghp = (GREhdr*)(bp->rp);
1998/0306    
	v4tov6(raddr, ghp->src);
1998/0306/sys/src/9/ip/gre.c:175,181 – 1998/0313/sys/src/9/ip/gre.c:181,187
1997/0327    
 
	/* Look for a conversation structure for this port and address */ 
	c = nil; 
	for(p = gre.conv; *p; p++) {
1998/0313    
	for(p = gre->conv; *p; p++) {
1997/0327    
		c = *p; 
		if(c->inuse == 0) 
			continue;
1998/0306/sys/src/9/ip/gre.c:198,204 – 1998/0313/sys/src/9/ip/gre.c:204,210
1997/0327    
	}
1997/0530    
	bp = trimblock(bp, GRE_IPONLY, len);
1997/0327    
	if(bp == nil){ 
		gre.lenerr++;
1998/0313    
		gpriv->lenerr++;
1997/0327    
		return; 
	}
1998/0306/sys/src/9/ip/gre.c:216,245 – 1998/0313/sys/src/9/ip/gre.c:222,257
1997/0327    
}
1998/0306    
int 
grestats(char *buf, int len)
1998/0313    
grestats(Proto *gre, char *buf, int len)
1998/0306    
{ 
	return snprint(buf, len, 
		"gre: csum %d hlen %d len %d order %d rexmit %d\n", 
		gre.csumerr, gre.hlenerr, gre.lenerr, gre.order, gre.rexmit);
1998/0313    
	GREpriv *gpriv; 
 
	gpriv = gre->priv; 
 
	return snprint(buf, len, "gre: len %d\n", gpriv->lenerr);
1998/0306    
}
1997/0327    
void 
greinit(Fs *fs) 
{ 
	gre.name = "gre"; 
	gre.kick = grekick; 
	gre.connect = greconnect; 
	gre.announce = greannounce; 
	gre.state = grestate; 
	gre.create = grecreate; 
	gre.close = greclose; 
	gre.rcv = greiput; 
	gre.ctl = nil; 
	gre.advise = nil;
1998/0306    
	gre.stats = grestats;
1997/0327    
	gre.ipproto = IP_GREPROTO; 
	gre.nc = 64; 
	gre.ptclsize = 0;
1998/0313    
	Proto *gre;
1997/0327    
 
	Fsproto(fs, &gre);
1998/0313    
	gre = smalloc(sizeof(Proto)); 
	gre->priv = smalloc(sizeof(GREpriv)); 
	gre->name = "gre"; 
	gre->kick = grekick; 
	gre->connect = greconnect; 
	gre->announce = greannounce; 
	gre->state = grestate; 
	gre->create = grecreate; 
	gre->close = greclose; 
	gre->rcv = greiput; 
	gre->ctl = nil; 
	gre->advise = nil; 
	gre->stats = grestats; 
	gre->ipproto = IP_GREPROTO; 
	gre->nc = 64; 
	gre->ptclsize = 0; 
 
	Fsproto(fs, gre);
1997/0327    
}
1998/0313/sys/src/9/ip/gre.c:68,74 – 1998/0401/sys/src/9/ip/gre.c:68,74 (short | long)
Bug: use ipcmp to compare addresses, not ptr comparison.
rsc Fri Mar 4 12:44:25 2005
1997/0327    
			break; 
		if(tc == c) 
			continue; 
		if(tc->rport == c->rport && tc->raddr == c->raddr){
1998/0401    
		if(tc->rport == c->rport && ipcmp(tc->raddr, c->raddr) == 0){
1997/0327    
			err = "already connected to that addr/proto";
1998/0306    
			ipmove(c->laddr, IPnoaddr); 
			ipmove(c->raddr, IPnoaddr);
1998/0401/sys/src/9/ip/gre.c:228,234 – 1998/0825/sys/src/9/ip/gre.c:228,234 (short | long)
Bug fix: print format.
rsc Fri Mar 4 12:44:25 2005
1998/0313    
 
	gpriv = gre->priv; 
 
	return snprint(buf, len, "gre: len %d\n", gpriv->lenerr);
1998/0825    
	return snprint(buf, len, "gre: len %lud\n", gpriv->lenerr);
1998/0306    
}
1997/0327    
void
1998/0825/sys/src/9/ip/gre.c:115,121 – 1999/0302/sys/src/9/ip/gre.c:115,121 (short | long)
1997/0327    
	c->lport = 0; 
	c->rport = 0; 
 
	unlock(c);
1999/0302    
	qunlock(c);
1997/0327    
} 
 
int drop;
1998/0825/sys/src/9/ip/gre.c:179,184 – 1999/0302/sys/src/9/ip/gre.c:179,186
1998/0306    
	v4tov6(raddr, ghp->src);
1997/0327    
	eproto = nhgets(ghp->eproto);
1999/0302    
	qlock(gre);
1997/0327    
	/* Look for a conversation structure for this port and address */ 
	c = nil;
1998/0313    
	for(p = gre->conv; *p; p++) {
1998/0825/sys/src/9/ip/gre.c:190,198 – 1999/0302/sys/src/9/ip/gre.c:192,203
1997/0327    
	} 
 
	if(*p == nil) {
1999/0302    
		qunlock(gre);
1997/0327    
		freeblist(bp); 
		return; 
	}
1999/0302    
 
	qunlock(gre);
1997/0327    
 
	/* 
	 * Trim the packet down to data size
1999/0302/sys/src/9/ip/gre.c:160,166 – 1999/0817/sys/src/9/ip/gre.c:160,166 (short | long)
1997/0522    
	ghp->frag[0] = 0; 
	ghp->frag[1] = 0;
1997/0327    
1998/0313    
	ipoput(c->p->f, bp, 0, c->ttl);
1999/0817    
	ipoput(c->p->f, bp, 0, c->ttl, c->tos);
1997/0327    
} 
 
static void
1999/0817/sys/src/9/ip/gre.c:114,121 – 2000/1220/sys/src/9/ip/gre.c:114,119 (short | long)
1998/0306    
	ipmove(c->raddr, IPnoaddr);
1997/0327    
	c->lport = 0; 
	c->rport = 0; 
                 
1999/0302    
	qunlock(c);
1997/0327    
} 
 
int drop;
2000/1220/sys/src/9/ip/gre.c:94,100 – 2001/0127/sys/src/9/ip/gre.c:94,100 (short | long)
1997/0327    
static void 
grecreate(Conv *c) 
{ 
	c->rq = qopen(64*1024, 0, 0, c);
2001/0127    
	c->rq = qopen(64*1024, 1, 0, c);
1997/0327    
	c->wq = qopen(64*1024, 0, 0, 0); 
}
2001/0127/sys/src/9/ip/gre.c:119,131 – 2001/0306/sys/src/9/ip/gre.c:119,129 (short | long)
1997/0327    
int drop; 
 
static void 
grekick(Conv *c, int l)
2001/0306    
grekick(Conv *c)
1997/0327    
{ 
	GREhdr *ghp;
1997/0524    
	Block *bp;
1998/0306    
	uchar laddr[IPaddrlen], raddr[IPaddrlen];
1997/0327    
                 
	USED(l); 
 
	bp = qget(c->wq); 
	if(bp == nil)
2001/0306/sys/src/9/ip/gre.c:160,166 – 2001/0623/sys/src/9/ip/gre.c:160,166 (short | long)
1997/0327    
} 
 
static void
1998/0313    
greiput(Proto *gre, uchar*, Block *bp)
2001/0623    
greiput(Proto *gre, Ipifc*, Block *bp)
1997/0327    
{ 
	int len; 
	GREhdr *ghp;
2001/0623/sys/src/9/ip/gre.c:140,145 – 2002/0507/sys/src/9/ip/gre.c:140,146 (short | long)
1997/0327    
		return; 
 
	ghp = (GREhdr *)(bp->rp);
2002/0507    
	ghp->vihl = IP_VER4;
1997/0327    
1998/0306    
	v4tov6(raddr, ghp->dst); 
	if(ipcmp(raddr, v4prefix) == 0)
2001/0623/sys/src/9/ip/gre.c:156,162 – 2002/0507/sys/src/9/ip/gre.c:157,163
1997/0522    
	ghp->frag[0] = 0; 
	ghp->frag[1] = 0;
1997/0327    
1999/0817    
	ipoput(c->p->f, bp, 0, c->ttl, c->tos);
2002/0507    
	ipoput4(c->p->f, bp, 0, c->ttl, c->tos);
1997/0327    
} 
 
static void
2002/0507/sys/src/9/ip/gre.c:94,100 – 2002/0711/sys/src/9/ip/gre.c:94,100 (short | long)
1997/0327    
static void 
grecreate(Conv *c) 
{
2001/0127    
	c->rq = qopen(64*1024, 1, 0, c);
2002/0711    
	c->rq = qopen(64*1024, Qmsg, 0, c);
1997/0327    
	c->wq = qopen(64*1024, 0, 0, 0); 
}
2002/0711/sys/src/9/ip/gre.c:47,52 – 2002/0712/sys/src/9/ip/gre.c:47,54 (short | long)
1998/0313    
	ulong		lenerr;			/* short packet */ 
};
1997/0327    
2002/0712    
static void grekick(void *x);
1997/0327    
static char* 
greconnect(Conv *c, char **argv, int argc) 
{
2002/0711/sys/src/9/ip/gre.c:84,89 – 2002/0712/sys/src/9/ip/gre.c:86,98
1997/0403    
	return nil;
1997/0327    
}
2002/0712    
static void 
grecreate(Conv *c) 
{ 
	c->rq = qopen(64*1024, Qmsg, 0, c); 
	c->wq = qopen(64*1024, Qkick, grekick, c); 
}
1997/0327    
static int
1998/0306    
grestate(Conv *c, char *state, int n)
1997/0327    
{
2002/0711/sys/src/9/ip/gre.c:91,103 – 2002/0712/sys/src/9/ip/gre.c:100,105
1998/0306    
	return snprint(state, n, "%s", "Datagram");
1997/0327    
} 
 
static void 
grecreate(Conv *c) 
{
2002/0711    
	c->rq = qopen(64*1024, Qmsg, 0, c);
1997/0327    
	c->wq = qopen(64*1024, 0, 0, 0); 
} 
                 
1997/0403    
static char* 
greannounce(Conv*, char**, int)
1997/0327    
{
2002/0711/sys/src/9/ip/gre.c:119,126 – 2002/0712/sys/src/9/ip/gre.c:121,129
1997/0327    
int drop; 
 
static void
2001/0306    
grekick(Conv *c)
2002/0712    
grekick(void *x)
1997/0327    
{
2002/0712    
	Conv *c = x;
1997/0327    
	GREhdr *ghp;
1997/0524    
	Block *bp;
1998/0306    
	uchar laddr[IPaddrlen], raddr[IPaddrlen];
2002/0711/sys/src/9/ip/gre.c:241,247 – 2002/0712/sys/src/9/ip/gre.c:244,249
1998/0313    
	gre = smalloc(sizeof(Proto)); 
	gre->priv = smalloc(sizeof(GREpriv)); 
	gre->name = "gre"; 
	gre->kick = grekick; 
	gre->connect = greconnect; 
	gre->announce = greannounce; 
	gre->state = grestate;
2002/0712/sys/src/9/ip/gre.c:47,53 – 2003/0220/sys/src/9/ip/gre.c:47,53 (short | long)
1998/0313    
	ulong		lenerr;			/* short packet */ 
};
1997/0327    
2002/0712    
static void grekick(void *x);
2003/0220    
static void grekick(void *x, Block *bp);
2002/0712    
1997/0327    
static char* 
greconnect(Conv *c, char **argv, int argc)
2002/0712/sys/src/9/ip/gre.c:90,96 – 2003/0220/sys/src/9/ip/gre.c:90,96
2002/0712    
grecreate(Conv *c) 
{ 
	c->rq = qopen(64*1024, Qmsg, 0, c); 
	c->wq = qopen(64*1024, Qkick, grekick, c);
2003/0220    
	c->wq = qbypass(grekick, c);
2002/0712    
}
1997/0327    
static int
2002/0712/sys/src/9/ip/gre.c:121,134 – 2003/0220/sys/src/9/ip/gre.c:121,132
1997/0327    
int drop; 
 
static void
2002/0712    
grekick(void *x)
2003/0220    
grekick(void *x, Block *bp)
1997/0327    
{
2002/0712    
	Conv *c = x;
1997/0327    
	GREhdr *ghp;
1997/0524    
	Block *bp;
1998/0306    
	uchar laddr[IPaddrlen], raddr[IPaddrlen];
1997/0327    
 
	bp = qget(c->wq); 
	if(bp == nil) 
		return;
2003/0220/sys/src/9/ip/gre.c:158,164 – 2003/0308/sys/src/9/ip/gre.c:158,164 (short | long)
1997/0522    
	ghp->frag[0] = 0; 
	ghp->frag[1] = 0;
1997/0327    
2002/0507    
	ipoput4(c->p->f, bp, 0, c->ttl, c->tos);
2003/0308    
	ipoput4(c->p->f, bp, 0, c->ttl, c->tos, nil);
1997/0327    
} 
 
static void


source code copyright © 1990-2005 Lucent Technologies; see license
Plan 9 distribution
comments to russ cox (rsc@swtch.com)