freebsd-dev/sbin/ifconfig/iflagg.c
Alan Somers 6223cc336e Various Coverity fixes in ifconfig(8)
* Exit early if kldload(2) fails (1011259). This is the only change that
  affects ifconfig's behavior.
* Close memory and resource leaks (1305624, 1305205, 1007100)
* Mark usage() as _Noreturn (1305806, 1305750)
* Fix some dereference after null checks (1011474, 270774)

Reported by:	Coverity
CID:		1305624, 1305205, 1007100, 1305806, 1305750, 1011474,
CID:		270774, 1011259
Reviewed by:	cem
MFC after:	3 weeks
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D10587
2017-05-03 17:21:01 +00:00

324 lines
8.0 KiB
C

/*-
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <stdlib.h>
#include <unistd.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_lagg.h>
#include <net/ieee8023ad_lacp.h>
#include <net/route.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>
#include "ifconfig.h"
char lacpbuf[120]; /* LACP peer '[(a,a,a),(p,p,p)]' */
static void
setlaggport(const char *val, int d, int s, const struct afswtch *afp)
{
struct lagg_reqport rp;
bzero(&rp, sizeof(rp));
strlcpy(rp.rp_ifname, name, sizeof(rp.rp_ifname));
strlcpy(rp.rp_portname, val, sizeof(rp.rp_portname));
/* Don't choke if the port is already in this lagg. */
if (ioctl(s, SIOCSLAGGPORT, &rp) && errno != EEXIST)
err(1, "SIOCSLAGGPORT");
}
static void
unsetlaggport(const char *val, int d, int s, const struct afswtch *afp)
{
struct lagg_reqport rp;
bzero(&rp, sizeof(rp));
strlcpy(rp.rp_ifname, name, sizeof(rp.rp_ifname));
strlcpy(rp.rp_portname, val, sizeof(rp.rp_portname));
if (ioctl(s, SIOCSLAGGDELPORT, &rp))
err(1, "SIOCSLAGGDELPORT");
}
static void
setlaggproto(const char *val, int d, int s, const struct afswtch *afp)
{
struct lagg_protos lpr[] = LAGG_PROTOS;
struct lagg_reqall ra;
int i;
bzero(&ra, sizeof(ra));
ra.ra_proto = LAGG_PROTO_MAX;
for (i = 0; i < nitems(lpr); i++) {
if (strcmp(val, lpr[i].lpr_name) == 0) {
ra.ra_proto = lpr[i].lpr_proto;
break;
}
}
if (ra.ra_proto == LAGG_PROTO_MAX)
errx(1, "Invalid aggregation protocol: %s", val);
strlcpy(ra.ra_ifname, name, sizeof(ra.ra_ifname));
if (ioctl(s, SIOCSLAGG, &ra) != 0)
err(1, "SIOCSLAGG");
}
static void
setlaggflowidshift(const char *val, int d, int s, const struct afswtch *afp)
{
struct lagg_reqopts ro;
bzero(&ro, sizeof(ro));
ro.ro_opts = LAGG_OPT_FLOWIDSHIFT;
strlcpy(ro.ro_ifname, name, sizeof(ro.ro_ifname));
ro.ro_flowid_shift = (int)strtol(val, NULL, 10);
if (ro.ro_flowid_shift & ~LAGG_OPT_FLOWIDSHIFT_MASK)
errx(1, "Invalid flowid_shift option: %s", val);
if (ioctl(s, SIOCSLAGGOPTS, &ro) != 0)
err(1, "SIOCSLAGGOPTS");
}
static void
setlaggrr_limit(const char *val, int d, int s, const struct afswtch *afp)
{
struct lagg_reqopts ro;
bzero(&ro, sizeof(ro));
strlcpy(ro.ro_ifname, name, sizeof(ro.ro_ifname));
ro.ro_bkt = (int)strtol(val, NULL, 10);
if (ioctl(s, SIOCSLAGGOPTS, &ro) != 0)
err(1, "SIOCSLAGG");
}
static void
setlaggsetopt(const char *val, int d, int s, const struct afswtch *afp)
{
struct lagg_reqopts ro;
bzero(&ro, sizeof(ro));
ro.ro_opts = d;
switch (ro.ro_opts) {
case LAGG_OPT_USE_FLOWID:
case -LAGG_OPT_USE_FLOWID:
case LAGG_OPT_LACP_STRICT:
case -LAGG_OPT_LACP_STRICT:
case LAGG_OPT_LACP_TXTEST:
case -LAGG_OPT_LACP_TXTEST:
case LAGG_OPT_LACP_RXTEST:
case -LAGG_OPT_LACP_RXTEST:
case LAGG_OPT_LACP_TIMEOUT:
case -LAGG_OPT_LACP_TIMEOUT:
break;
default:
err(1, "Invalid lagg option");
}
strlcpy(ro.ro_ifname, name, sizeof(ro.ro_ifname));
if (ioctl(s, SIOCSLAGGOPTS, &ro) != 0)
err(1, "SIOCSLAGGOPTS");
}
static void
setlagghash(const char *val, int d, int s, const struct afswtch *afp)
{
struct lagg_reqflags rf;
char *str, *tmp, *tok;
rf.rf_flags = 0;
str = tmp = strdup(val);
while ((tok = strsep(&tmp, ",")) != NULL) {
if (strcmp(tok, "l2") == 0)
rf.rf_flags |= LAGG_F_HASHL2;
else if (strcmp(tok, "l3") == 0)
rf.rf_flags |= LAGG_F_HASHL3;
else if (strcmp(tok, "l4") == 0)
rf.rf_flags |= LAGG_F_HASHL4;
else
errx(1, "Invalid lagghash option: %s", tok);
}
free(str);
if (rf.rf_flags == 0)
errx(1, "No lagghash options supplied");
strlcpy(rf.rf_ifname, name, sizeof(rf.rf_ifname));
if (ioctl(s, SIOCSLAGGHASH, &rf))
err(1, "SIOCSLAGGHASH");
}
static char *
lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
{
snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
(int)mac[0], (int)mac[1], (int)mac[2], (int)mac[3],
(int)mac[4], (int)mac[5]);
return (buf);
}
static char *
lacp_format_peer(struct lacp_opreq *req, const char *sep)
{
char macbuf1[20];
char macbuf2[20];
snprintf(lacpbuf, sizeof(lacpbuf),
"[(%04X,%s,%04X,%04X,%04X),%s(%04X,%s,%04X,%04X,%04X)]",
req->actor_prio,
lacp_format_mac(req->actor_mac, macbuf1, sizeof(macbuf1)),
req->actor_key, req->actor_portprio, req->actor_portno, sep,
req->partner_prio,
lacp_format_mac(req->partner_mac, macbuf2, sizeof(macbuf2)),
req->partner_key, req->partner_portprio, req->partner_portno);
return(lacpbuf);
}
static void
lagg_status(int s)
{
struct lagg_protos lpr[] = LAGG_PROTOS;
struct lagg_reqport rpbuf[LAGG_MAX_PORTS];
struct lagg_reqall ra;
struct lagg_reqopts ro;
struct lagg_reqflags rf;
struct lacp_opreq *lp;
const char *proto = "<unknown>";
int i;
bzero(&ra, sizeof(ra));
bzero(&ro, sizeof(ro));
strlcpy(ra.ra_ifname, name, sizeof(ra.ra_ifname));
ra.ra_size = sizeof(rpbuf);
ra.ra_port = rpbuf;
strlcpy(ro.ro_ifname, name, sizeof(ro.ro_ifname));
ioctl(s, SIOCGLAGGOPTS, &ro);
strlcpy(rf.rf_ifname, name, sizeof(rf.rf_ifname));
if (ioctl(s, SIOCGLAGGFLAGS, &rf) != 0)
rf.rf_flags = 0;
if (ioctl(s, SIOCGLAGG, &ra) == 0) {
lp = (struct lacp_opreq *)&ra.ra_lacpreq;
for (i = 0; i < nitems(lpr); i++) {
if (ra.ra_proto == lpr[i].lpr_proto) {
proto = lpr[i].lpr_name;
break;
}
}
printf("\tlaggproto %s", proto);
if (rf.rf_flags & LAGG_F_HASHMASK) {
const char *sep = "";
printf(" lagghash ");
if (rf.rf_flags & LAGG_F_HASHL2) {
printf("%sl2", sep);
sep = ",";
}
if (rf.rf_flags & LAGG_F_HASHL3) {
printf("%sl3", sep);
sep = ",";
}
if (rf.rf_flags & LAGG_F_HASHL4) {
printf("%sl4", sep);
sep = ",";
}
}
putchar('\n');
if (verbose) {
printf("\tlagg options:\n");
printb("\t\tflags", ro.ro_opts, LAGG_OPT_BITS);
putchar('\n');
printf("\t\tflowid_shift: %d\n", ro.ro_flowid_shift);
if (ra.ra_proto == LAGG_PROTO_ROUNDROBIN)
printf("\t\trr_limit: %d\n", ro.ro_bkt);
printf("\tlagg statistics:\n");
printf("\t\tactive ports: %d\n", ro.ro_active);
printf("\t\tflapping: %u\n", ro.ro_flapping);
if (ra.ra_proto == LAGG_PROTO_LACP) {
printf("\tlag id: %s\n",
lacp_format_peer(lp, "\n\t\t "));
}
}
for (i = 0; i < ra.ra_ports; i++) {
lp = (struct lacp_opreq *)&rpbuf[i].rp_lacpreq;
printf("\tlaggport: %s ", rpbuf[i].rp_portname);
printb("flags", rpbuf[i].rp_flags, LAGG_PORT_BITS);
if (verbose && ra.ra_proto == LAGG_PROTO_LACP)
printb(" state", lp->actor_state,
LACP_STATE_BITS);
putchar('\n');
if (verbose && ra.ra_proto == LAGG_PROTO_LACP)
printf("\t\t%s\n",
lacp_format_peer(lp, "\n\t\t "));
}
if (0 /* XXX */) {
printf("\tsupported aggregation protocols:\n");
for (i = 0; i < nitems(lpr); i++)
printf("\t\tlaggproto %s\n", lpr[i].lpr_name);
}
}
}
static struct cmd lagg_cmds[] = {
DEF_CMD_ARG("laggport", setlaggport),
DEF_CMD_ARG("-laggport", unsetlaggport),
DEF_CMD_ARG("laggproto", setlaggproto),
DEF_CMD_ARG("lagghash", setlagghash),
DEF_CMD("use_flowid", LAGG_OPT_USE_FLOWID, setlaggsetopt),
DEF_CMD("-use_flowid", -LAGG_OPT_USE_FLOWID, setlaggsetopt),
DEF_CMD("lacp_strict", LAGG_OPT_LACP_STRICT, setlaggsetopt),
DEF_CMD("-lacp_strict", -LAGG_OPT_LACP_STRICT, setlaggsetopt),
DEF_CMD("lacp_txtest", LAGG_OPT_LACP_TXTEST, setlaggsetopt),
DEF_CMD("-lacp_txtest", -LAGG_OPT_LACP_TXTEST, setlaggsetopt),
DEF_CMD("lacp_rxtest", LAGG_OPT_LACP_RXTEST, setlaggsetopt),
DEF_CMD("-lacp_rxtest", -LAGG_OPT_LACP_RXTEST, setlaggsetopt),
DEF_CMD("lacp_fast_timeout", LAGG_OPT_LACP_TIMEOUT, setlaggsetopt),
DEF_CMD("-lacp_fast_timeout", -LAGG_OPT_LACP_TIMEOUT, setlaggsetopt),
DEF_CMD_ARG("flowid_shift", setlaggflowidshift),
DEF_CMD_ARG("rr_limit", setlaggrr_limit),
};
static struct afswtch af_lagg = {
.af_name = "af_lagg",
.af_af = AF_UNSPEC,
.af_other_status = lagg_status,
};
static __constructor void
lagg_ctor(void)
{
int i;
for (i = 0; i < nitems(lagg_cmds); i++)
cmd_register(&lagg_cmds[i]);
af_register(&af_lagg);
}