int
rn_inithead(struct radix_node_head **head, int off)
{
struct radix_node_head *rnh;
struct radix_node *t, *tt, *ttt;
if (*head)
return (1);
rnh = (struct radix_node_head *)rtmalloc(sizeof(*rnh), "rn_inithead");
Bzero(rnh, sizeof (*rnh));
*head = rnh;
t = rn_newpair(rn_zeros, off, rnh->rnh_nodes);
ttt = rnh->rnh_nodes + 2;
t->rn_r = ttt;
t->rn_p = t;
tt = t->rn_l;
tt->rn_flags = t->rn_flags = RNF_ROOT | RNF_ACTIVE;
tt->rn_b = -1 - off;
*ttt = *tt;
ttt->rn_key = rn_ones;
rnh->rnh_addaddr = rn_addroute;
rnh->rnh_deladdr = rn_delete;
rnh->rnh_matchaddr = rn_match;
rnh->rnh_lookup = rn_lookup;
rnh->rnh_walktree = rn_walktree;
rnh->rnh_treetop = t;
return (1);
}
void
rn_init(void)
{
char *cp, *cplim;
if (max_keylen == 0) {
printf("rn_init: radix functions require max_keylen be set\n");
return;
}
rn_zeros = (char *)rtmalloc(3 * max_keylen, "rn_init");
Bzero(rn_zeros, 3 * max_keylen);
rn_ones = cp = rn_zeros + max_keylen;
addmask_key = cplim = rn_ones + max_keylen;
while (cp < cplim)
*cp++ = -1;
if (rn_inithead(&mask_rnhead, 0) == 0)
panic("rn_init 2");
}
/*
* Parse a set of parameters for an interface.
* returns NULL or error message
*/
const char *
parse_parms(char *line,
boolean_t safe) /* 1=from secure file */
{
#define PARS(str) (strcasecmp(tgt, str) == 0)
#define PARSEQ(str) (strncasecmp(tgt, str"=", sizeof (str)) == 0)
/*
* This macro checks for conflicting configurations options
* For eg one can set either the IS_NO_SOL_OUT flag bit or the IS_SOL_OUT flag
* bit, but not both.
*/
#define CKF(g, b) {if (0 != (parm.parm_int_state & ((g) & ~(b)))) break; \
parm.parm_int_state |= (b); }
struct parm parm;
struct intnet *intnetp;
struct r1net *r1netp;
struct tgate *tg;
uint32_t addr, mask;
char delim, *val0 = 0, *tgt, *val, *p;
const char *msg;
char buf[PARMS_MAXLINELEN], buf2[PARMS_MAXLINELEN];
int i;
/* "subnet=x.y.z.u/mask[,metric]" must be alone on the line */
if (strncasecmp(line, "subnet=", sizeof ("subnet=") - 1) == 0 &&
*(val = &line[sizeof ("subnet=") -1 ]) != '\0') {
if (0 > parse_quote(&val, ",", &delim, buf, sizeof (buf)))
return (bad_str(line));
intnetp = rtmalloc(sizeof (*intnetp),
"parse_parms subnet");
intnetp->intnet_metric = 1;
if (delim == ',') {
intnetp->intnet_metric = (int)strtol(val+1, &p, 0);
if (*p != '\0' || intnetp->intnet_metric <= 0 ||
val+1 == p ||
intnetp->intnet_metric >= HOPCNT_INFINITY) {
free(intnetp);
return (bad_str(line));
}
}
if (!getnet(buf, &intnetp->intnet_addr,
&intnetp->intnet_mask) ||
intnetp->intnet_mask == HOST_MASK ||
intnetp->intnet_addr == RIP_DEFAULT) {
free(intnetp);
return (bad_str(line));
}
intnetp->intnet_addr = htonl(intnetp->intnet_addr);
intnetp->intnet_next = intnets;
intnets = intnetp;
return (NULL);
}
/*
* "ripv1_mask=x.y.z.u/mask1,mask2" must be alone on the line.
* This requires that x.y.z.u/mask1 be considered a subnet of
* x.y.z.u/mask2, as if x.y.z.u/mask2 were a class-full network.
*/
if (!strncasecmp(line, "ripv1_mask=", sizeof ("ripv1_mask=") - 1) &&
*(val = &line[sizeof ("ripv1_mask=")-1]) != '\0') {
if (0 > parse_quote(&val, ",", &delim, buf, sizeof (buf)) ||
delim == '\0')
return (bad_str(line));
if ((i = (int)strtol(val+1, &p, 0)) <= 0 || i > 32 ||
*p != '\0')
return (bad_str(line));
r1netp = rtmalloc(sizeof (*r1netp), "parse_parms ripv1_mask");
r1netp->r1net_mask = HOST_MASK << (32-i);
if (!getnet(buf, &r1netp->r1net_net, &r1netp->r1net_match) ||
r1netp->r1net_net == RIP_DEFAULT ||
r1netp->r1net_mask > r1netp->r1net_match) {
free(r1netp);
return (bad_str(line));
}
r1netp->r1net_next = r1nets;
r1nets = r1netp;
return (NULL);
}
(void) memset(&parm, 0, sizeof (parm));
/*
* Support of the following for Solaris backward compatibility
* norip <ifname>
* noripin <ifname>
* noripout <ifname>
*/
if (strncasecmp("norip", line, 5) == 0) {
char cmd[64], ifname[64];
int n;
n = sscanf(line, "%63s %63s\n", cmd, ifname);
if (n != 2) {
/* Not enough parameters */
return (bad_str(line));
}
/*
* Get the interface name and turn on the appropriate
* interface flags
*/
(void) strlcpy(parm.parm_name, ifname, sizeof (parm.parm_name));
if (strcasecmp("norip", cmd) == 0) {
parm.parm_int_state |= IS_NO_RIP;
} else if (strcasecmp("noripin", cmd) == 0) {
parm.parm_int_state |= IS_NO_RIP_IN;
} else if (strcasecmp("noripout", cmd) == 0) {
parm.parm_int_state |= IS_NO_RIP_OUT;
} else {
/* Bad command */
return (bad_str(line));
}
/*
* Look for duplication, and if new,
* link to the rest of the parm entries.
*/
return (insert_parm(&parm));
}
for (;;) {
tgt = line + strspn(line, " ,\n\r");
if (*tgt == '\0' || *tgt == '#')
break;
line = tgt+strcspn(tgt, "= #,\n\r");
delim = *line;
if (delim == '=') {
val0 = ++line;
if (0 > parse_quote(&line, " #,", &delim,
buf, sizeof (buf)))
return (bad_str(tgt));
}
if (delim != '\0') {
for (;;) {
*line = '\0';
if (delim == '#')
break;
++line;
if (!isspace(delim) ||
((delim = *line), !isspace(delim)))
break;
}
}
if (PARSEQ("if")) {
if (parm.parm_name[0] != '\0' ||
strlen(buf) > IF_NAME_LEN)
return (bad_str(tgt));
(void) strlcpy(parm.parm_name, buf,
sizeof (parm.parm_name));
} else if (PARSEQ("addr")) {
/*
* This is a bad idea, because the address based
* sets of parameters cannot be checked for
* consistency with the interface name parameters.
* The parm_net stuff is needed to allow several
* -F settings.
*/
if (!getnet(val0, &addr, &mask) ||
parm.parm_name[0] != '\0')
return (bad_str(tgt));
parm.parm_net = addr;
parm.parm_mask = mask;
parm.parm_name[0] = '\n';
} else if (PARSEQ("passwd")) {
/*
* since cleartext passwords are so weak allow
* them anywhere
*/
msg = get_passwd(tgt, val0, &parm, RIP_AUTH_PW, 1);
if (msg) {
*val0 = '\0';
return (bad_str(msg));
}
} else if (PARSEQ("md5_passwd")) {
msg = get_passwd(tgt, val0, &parm, RIP_AUTH_MD5, safe);
if (msg) {
*val0 = '\0';
return (bad_str(msg));
}
} else if (PARS("no_ag")) {
parm.parm_int_state |= (IS_NO_AG | IS_NO_SUPER_AG);
} else if (PARS("no_host")) {
parm.parm_int_state |= IS_NO_HOST;
} else if (PARS("no_super_ag")) {
parm.parm_int_state |= IS_NO_SUPER_AG;
} else if (PARS("no_ripv1_in")) {
parm.parm_int_state |= IS_NO_RIPV1_IN;
} else if (PARS("no_ripv2_in")) {
parm.parm_int_state |= IS_NO_RIPV2_IN;
} else if (PARS("ripv2_out")) {
if (parm.parm_int_state & IS_NO_RIPV2_OUT)
return (bad_str(tgt));
parm.parm_int_state |= IS_NO_RIPV1_OUT;
} else if (PARS("ripv2")) {
if ((parm.parm_int_state & IS_NO_RIPV2_OUT) ||
(parm.parm_int_state & IS_NO_RIPV2_IN))
return (bad_str(tgt));
parm.parm_int_state |= (IS_NO_RIPV1_IN
| IS_NO_RIPV1_OUT);
} else if (PARS("no_rip")) {
CKF(IS_PM_RDISC, IS_NO_RIP);
} else if (PARS("no_rip_mcast")) {
parm.parm_int_state |= IS_NO_RIP_MCAST;
} else if (PARS("no_rdisc")) {
CKF((GROUP_IS_SOL_OUT|GROUP_IS_ADV_OUT), IS_NO_RDISC);
} else if (PARS("no_solicit")) {
CKF(GROUP_IS_SOL_OUT, IS_NO_SOL_OUT);
} else if (PARS("send_solicit")) {
CKF(GROUP_IS_SOL_OUT, IS_SOL_OUT);
} else if (PARS("no_rdisc_adv")) {
CKF(GROUP_IS_ADV_OUT, IS_NO_ADV_OUT);
} else if (PARS("rdisc_adv")) {
CKF(GROUP_IS_ADV_OUT, IS_ADV_OUT);
} else if (PARS("bcast_rdisc")) {
parm.parm_int_state |= IS_BCAST_RDISC;
} else if (PARS("passive")) {
CKF((GROUP_IS_SOL_OUT|GROUP_IS_ADV_OUT), IS_NO_RDISC);
parm.parm_int_state |= IS_NO_RIP | IS_PASSIVE;
} else if (PARSEQ("rdisc_pref")) {
if (parm.parm_rdisc_pref != 0 ||
(parm.parm_rdisc_pref = (int)strtol(buf, &p, 0),
*p != '\0') || (buf == p))
return (bad_str(tgt));
} else if (PARS("pm_rdisc")) {
if (IS_RIP_OUT_OFF(parm.parm_int_state))
return (bad_str(tgt));
parm.parm_int_state |= IS_PM_RDISC;
} else if (PARSEQ("rdisc_interval")) {
if (parm.parm_rdisc_int != 0 ||
(parm.parm_rdisc_int = (int)strtoul(buf, &p, 0),
*p != '\0') || (buf == p) ||
parm.parm_rdisc_int < MIN_MAXADVERTISEINTERVAL ||
parm.parm_rdisc_int > MAX_MAXADVERTISEINTERVAL)
return (bad_str(tgt));
} else if (PARSEQ("fake_default")) {
if (parm.parm_d_metric != 0 ||
IS_RIP_OUT_OFF(parm.parm_int_state) ||
(parm.parm_d_metric = (int)strtoul(buf, &p, 0),
*p != '\0') || (buf == p) ||
parm.parm_d_metric > HOPCNT_INFINITY-1)
return (bad_str(tgt));
} else if (PARSEQ("trust_gateway")) {
/* look for trust_gateway=x.y.z|net/mask|...) */
p = buf;
if (0 > parse_quote(&p, "|", &delim, buf2,
sizeof (buf2)) || !gethost(buf2, &addr))
return (bad_str(tgt));
tg = rtmalloc(sizeof (*tg),
"parse_parms trust_gateway");
(void) memset(tg, 0, sizeof (*tg));
tg->tgate_addr = addr;
i = 0;
/* The default is to trust all routes. */
while (delim == '|') {
p++;
if (i >= MAX_TGATE_NETS ||
0 > parse_quote(&p, "|", &delim, buf2,
sizeof (buf2)) ||
!getnet(buf2, &tg->tgate_nets[i].net,
&tg->tgate_nets[i].mask) ||
tg->tgate_nets[i].net == RIP_DEFAULT ||
tg->tgate_nets[i].mask == 0) {
free(tg);
return (bad_str(tgt));
}
i++;
}
tg->tgate_next = tgates;
tgates = tg;
parm.parm_int_state |= IS_DISTRUST;
} else if (PARS("redirect_ok")) {
parm.parm_int_state |= IS_REDIRECT_OK;
} else if (PARSEQ("rip_neighbor")) {
if (parm.parm_name[0] == '\0' ||
gethost(buf, &parm.parm_ripout_addr) != 1)
return (bad_str(tgt));
} else {
return (bad_str(tgt)); /* error */
}
}
return (insert_parm(&parm));
#undef PARS
#undef PARSEQ
#undef CKF
}
static struct radix_node *
rn_addmask(void *n_arg, int search, int skip)
{
caddr_t netmask = (caddr_t)n_arg;
struct radix_node *x;
caddr_t cp, cplim;
int b = 0, mlen, j;
int maskduplicated, m0, isnormal;
struct radix_node *saved_x;
static int last_zeroed = 0;
if ((mlen = *(u_char *)netmask) > max_keylen)
mlen = max_keylen;
if (skip == 0)
skip = 1;
if (mlen <= skip)
return (mask_rnhead->rnh_nodes);
if (skip > 1)
Bcopy(rn_ones + 1, addmask_key + 1, skip - 1);
if ((m0 = mlen) > skip)
Bcopy(netmask + skip, addmask_key + skip, mlen - skip);
/*
* Trim trailing zeroes.
*/
for (cp = addmask_key + mlen; (cp > addmask_key) && cp[-1] == 0;)
cp--;
mlen = cp - addmask_key;
if (mlen <= skip) {
if (m0 >= last_zeroed)
last_zeroed = mlen;
return (mask_rnhead->rnh_nodes);
}
if (m0 < last_zeroed)
Bzero(addmask_key + m0, last_zeroed - m0);
*addmask_key = last_zeroed = mlen;
x = rn_search(addmask_key, rn_masktop);
if (Bcmp(addmask_key, x->rn_key, mlen) != 0)
x = 0;
if (x || search)
return (x);
x = (struct radix_node *)rtmalloc(max_keylen + 2*sizeof(*x),
"rn_addmask");
saved_x = x;
Bzero(x, max_keylen + 2 * sizeof (*x));
netmask = cp = (caddr_t)(x + 2);
Bcopy(addmask_key, cp, mlen);
x = rn_insert(cp, mask_rnhead, &maskduplicated, x);
if (maskduplicated) {
log(LOG_ERR, "rn_addmask: mask impossibly already in tree");
Free(saved_x);
return (x);
}
/*
* Calculate index of mask, and check for normalcy.
*/
cplim = netmask + mlen; isnormal = 1;
for (cp = netmask + skip; (cp < cplim) && *(u_char *)cp == 0xff;)
cp++;
if (cp != cplim) {
for (j = 0x80; (j & *cp) != 0; j >>= 1)
b++;
if (*cp != normal_chars[b] || cp != (cplim - 1))
isnormal = 0;
}
b += (cp - netmask) << 3;
x->rn_b = -1 - b;
if (isnormal)
x->rn_flags |= RNF_NORMAL;
return (x);
}
/*
* Read a list of gateways from /etc/gateways and add them to our tables.
*
* This file contains a list of "remote" gateways. That is usually
* a gateway which we cannot immediately determine if it is present or
* not as we can do for those provided by directly connected hardware.
*
* If a gateway is marked "passive" in the file, then we assume it
* does not understand RIP and assume it is always present. Those
* not marked passive are treated as if they were directly connected
* and assumed to be broken if they do not send us advertisements.
* All remote interfaces are added to our list, and those not marked
* passive are sent routing updates.
*
* A passive interface can also be local, hardware interface exempt
* from RIP.
*/
void
gwkludge(void)
{
#define STR2(x) #x
#define STR(x) STR2(x)
#define NETHOST_LEN 4
#define DNAME_LEN MAXHOSTNAMELEN
#define GNAME_LEN MAXHOSTNAMELEN
#define QUAL_LEN 8
FILE *fp;
char *p, *lptr;
const char *cp;
char lbuf[PARMS_MAXLINELEN], net_host[NETHOST_LEN + 1];
char dname[MAXHOSTNAMELEN + 1];
char gname[MAXHOSTNAMELEN + 1], qual[QUAL_LEN +1];
struct interface *ifp;
uint32_t dst, netmask, gate;
int n;
uint32_t lnum;
struct stat sb;
uint32_t state, metric;
boolean_t default_dst;
fp = fopen(PATH_GATEWAYS, "r");
if (fp == NULL)
return;
if (0 > fstat(fileno(fp), &sb)) {
msglog("fstat() failed: %s for "PATH_GATEWAYS,
rip_strerror(errno));
(void) fclose(fp);
return;
}
for (lnum = 1; ; lnum++) {
if (NULL == fgets(lbuf, sizeof (lbuf), fp))
break;
/* Eliminate the /n character at the end of the lbuf */
if (strlen(lbuf) > 0)
lbuf[strlen(lbuf) - 1] = '\0';
/* Move lptr to the first non-space character */
for (lptr = lbuf; isspace(*lptr); lptr++)
;
if (*lptr == '#' || *lptr == '\0')
continue;
/* Move p to the end of the line */
p = lptr + strlen(lptr) - 1;
/* Skip all trailing spaces except escaped space */
while (p > lptr && (isspace(*p) && *(p-1) != '\\'))
p--;
/* truncate the line to remove trailing spaces */
*++p = '\0';
/* notice newfangled parameter lines */
if (strncasecmp("net", lptr, 3) != 0 &&
strncasecmp("host", lptr, 4) != 0) {
cp = parse_parms(lptr, (sb.st_uid == 0 &&
!(sb.st_mode&(S_IRWXG|S_IRWXO))));
if (cp != 0)
msglog("%s in line %u of "PATH_GATEWAYS,
cp, lnum);
continue;
}
/*
* Processes lines of the follwoing format:
* net|host <name>[/mask] gateway <Gname> metric <value>
* passive|active|extern
*/
qual[0] = '\0';
n = sscanf(lptr, "%"STR(NETHOST_LEN)"s %"STR(DNAME_LEN)
"[^ \t] gateway %"STR(GNAME_LEN)"[^ / \t] metric %u %"
STR(QUAL_LEN)"s\n", net_host, dname, gname, &metric, qual);
if (n != 4 && n != 5) {
msglog("bad "PATH_GATEWAYS" entry \"%s\"; %d values",
lptr, n);
continue;
}
if (metric >= HOPCNT_INFINITY) {
msglog("bad metric in "PATH_GATEWAYS" entry \"%s\"",
lptr);
continue;
}
default_dst = _B_FALSE;
if (strcasecmp(net_host, "host") == 0) {
if (!gethost(dname, &dst)) {
msglog("bad host \"%s\" in "PATH_GATEWAYS
" entry \"%s\"", dname, lptr);
continue;
}
netmask = HOST_MASK;
} else if (strcasecmp(net_host, "net") == 0) {
if (!getnet(dname, &dst, &netmask)) {
msglog("bad net \"%s\" in "PATH_GATEWAYS
" entry \"%s\"", dname, lptr);
continue;
}
default_dst = (dst == RIP_DEFAULT);
dst = htonl(dst); /* make network # into IP address */
} else {
msglog("bad \"%s\" in "PATH_GATEWAYS
" entry \"%s\"", net_host, lptr);
continue;
}
if (!gethost(gname, &gate)) {
msglog("bad gateway \"%s\" in "PATH_GATEWAYS
" entry \"%s\"", gname, lptr);
continue;
}
if (strcasecmp(qual, "passive") == 0) {
/*
* Passive entries are not placed in our tables,
* only the kernel's, so we don't copy all of the
* external routing information within a net.
* Internal machines should use the default
* route to a suitable gateway (like us).
*/
state = IS_REMOTE | IS_PASSIVE;
if (metric == 0)
metric = 1;
} else if (strcasecmp(qual, "external") == 0) {
/*
* External entries are handled by other means
* such as EGP, and are placed only in the daemon
* tables to prevent overriding them with something
* else.
*/
(void) strlcpy(qual, "external", sizeof (qual));
state = IS_REMOTE | IS_PASSIVE | IS_EXTERNAL;
if (metric == 0)
metric = 1;
} else if (strcasecmp(qual, "active") == 0 ||
qual[0] == '\0') {
if (default_dst) {
msglog("bad net \"%s\" in "PATH_GATEWAYS
" entry \"%s\"-- cannot be default",
dname, lptr);
continue;
}
if (metric != 0) {
/*
* Entries that are neither "passive" nor
* "external" are "remote" and must behave
* like physical interfaces. If they are not
* heard from regularly, they are deleted.
*/
state = IS_REMOTE;
} else {
/*
* "remote" entries with a metric of 0
* are aliases for our own interfaces
*/
state = IS_REMOTE | IS_PASSIVE | IS_ALIAS;
}
} else {
msglog("bad "PATH_GATEWAYS" entry \"%s\";"
" unknown type %s", lptr, qual);
continue;
}
if (0 != (state & (IS_PASSIVE | IS_REMOTE)))
state |= IS_NO_RDISC;
if (state & IS_PASSIVE)
state |= IS_NO_RIP;
if (default_dst) {
addroutefordefault(dst, gate, netmask, metric,
((state & IS_EXTERNAL)? RTS_EXTERNAL : 0));
continue;
}
ifp = check_dup(NULL, gate, dst, netmask, 0, _B_FALSE);
if (ifp != NULL) {
msglog("duplicate "PATH_GATEWAYS" entry \"%s\"", lptr);
continue;
}
ifp = rtmalloc(sizeof (*ifp), "gwkludge()");
(void) memset(ifp, 0, sizeof (*ifp));
ifp->int_state = state;
if (netmask == HOST_MASK)
ifp->int_if_flags = IFF_POINTOPOINT | IFF_UP;
else
ifp->int_if_flags = IFF_UP;
ifp->int_act_time = NEVER;
ifp->int_addr = gate;
ifp->int_dstaddr = dst;
ifp->int_mask = netmask;
ifp->int_ripv1_mask = netmask;
ifp->int_std_mask = std_mask(gate);
ifp->int_net = ntohl(dst);
ifp->int_std_net = ifp->int_net & ifp->int_std_mask;
ifp->int_std_addr = htonl(ifp->int_std_net);
ifp->int_metric = metric;
if (!(state & IS_EXTERNAL) &&
ifp->int_mask != ifp->int_std_mask)
ifp->int_state |= IS_SUBNET;
(void) snprintf(ifp->int_name, sizeof (ifp->int_name),
"remote(%s)", gname);
if_link(ifp, 0);
}
(void) fclose(fp);
/*
* After all of the parameter lines have been read,
* apply them to any remote interfaces.
*/
for (ifp = ifnet; NULL != ifp; ifp = ifp->int_next) {
get_parms(ifp);
tot_interfaces++;
if (!IS_RIP_OFF(ifp->int_state))
rip_interfaces++;
if (!IS_RIP_OUT_OFF(ifp->int_state))
ripout_interfaces++;
trace_if("Add", ifp);
}
}
