1992/0213/port/devarp.c (diff list | history)

1992/0114/sys/src/9/port/devarp.c:53,58 – 1992/0213/sys/src/9/port/devarp.c:53,59 (short | long | prev | next)
1991/0424		enum{ arpdirqid,
1992/0213		arpdir2qid,
1991/0424		arpstatqid, arpctlqid, arpdataqid,
1992/0114/sys/src/9/port/devarp.c:59,70 – 1992/0213/sys/src/9/port/devarp.c:60,94
1991/0424		}; Dirtab arptab[]={
1991/1112		"stats", {arpstatqid}, 0, 0666, "ctl", {arpctlqid}, 0, 0666, "data", {arpdataqid}, 0, 0666,
1992/0213		"stats", {arpstatqid}, 0, 0444, "ctl", {arpctlqid}, 0, 0664, "data", {arpdataqid}, 0, 0664,
1991/0424		}; #define Narptab (sizeof(arptab)/sizeof(Dirtab))
1992/0213		/* * create a 2-level directory */ int arpgen(Chan *c, void *vp, int ntab, int i, Dir *dp) { Qid q; q.vers = 0; /* top level directory contains the directory arp */ if(c->qid.path == CHDIR){ if(i) return -1; q.path = CHDIR | arpdir2qid; devdir(c, q, "arp", 0, eve, 0555, dp); return 1; } /* next level uses table */ return devgen(c, arptab, Narptab, i, dp); }
1991/0424		void arpreset(void) {
1992/0114/sys/src/9/port/devarp.c:109,121 – 1992/0213/sys/src/9/port/devarp.c:133,145
1991/0424		int arpwalk(Chan *c, char *name) { return devwalk(c, name, arptab, (long)Narptab, devgen);
1992/0213		return devwalk(c, name, 0, 0, arpgen);
1991/0424		} void arpstat(Chan *c, char *db) { devstat(c, db, arptab, (long)Narptab, devgen);
1992/0213		devstat(c, db, 0, 0, arpgen);
1991/0424		} Chan *
1992/0114/sys/src/9/port/devarp.c:182,188 – 1992/0213/sys/src/9/port/devarp.c:206,212
1991/0424		switch((int)(c->qid.path&~CHDIR)){ case arpdirqid: return devdirread(c, a, n, arptab, Narptab, devgen);
1992/0213		return devdirread(c, a, n, 0, 0, arpgen);
1991/0424		case arpdataqid: bytes = c->offset; while(bytes < conf.arp*ARP_ENTRYLEN && n) {
1992/0114/sys/src/9/port/devarp.c:283,288 – 1992/0213/sys/src/9/port/devarp.c:307,314
1991/1027		{
1991/1029		uchar ip[4]; Etherhdr *eh;
1992/0213		Ipaddr addr; static int dropped;
1991/1029		if(bp->type != M_DATA) { if(Servq == 0 && streamparse("arpd", bp)) {
1992/0114/sys/src/9/port/devarp.c:295,301 – 1992/0213/sys/src/9/port/devarp.c:321,328
1991/1029		} if(!Servq) { print("arp: No server, packet dropped\n");
1992/0213		if((dropped++ % 1000) == 0) print("arp: No server, packet dropped\n");
1991/1029		freeb(bp); return; }
1992/0114/sys/src/9/port/devarp.c:308,319 – 1992/0213/sys/src/9/port/devarp.c:335,354
1991/1030
1991/1029		iproute(eh->dst, ip); /* Send downstream to the ethernet */
1992/0213		/* if a known ip addr, send downstream to the ethernet */
1991/1029		if(arplookup(ip, eh->d)) { PUTNEXT(q, bp); return; }
1992/0213		/* if ip broadcast, use ether bcast address */ addr = nhgetl(eh->dst); if(addr == Myip[Mybcast] || addr == Myip[Mynet] || addr == Myip[Mysubnet]){ memset(eh->d, 0xff, sizeof(eh->d)); PUTNEXT(q, bp); return; }
1991/1030		/* Push the packet up to the arp server for address resolution */
1991/1029		memmove(eh->d, ip, sizeof(ip)); PUTNEXT(Servq, bp);
1992/0114/sys/src/9/port/devarp.c:443,448 – 1992/0213/sys/src/9/port/devarp.c:478,484
1991/1027		ap->frwd = arplruhead; ap->prev = 0;
1992/0213
1991/1027		arplruhead = ap; } }