/* vi: set sw=4 ts=4: */
/*
- * iproute.c "ip route".
- *
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
* Changes:
*
- * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
+ * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
* Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized
*/
-#include "libbb.h"
-
+#include "ip_common.h" /* #include "libbb.h" is inside */
#include "rt_names.h"
#include "utils.h"
-#include "ip_common.h"
#ifndef RTAX_RTTVAR
#define RTAX_RTTVAR RTAX_HOPS
#endif
-static struct
-{
+struct filter_t {
int tb;
- int flushed;
+ smallint flushed;
char *flushb;
int flushp;
int flushe;
struct rtnl_handle *rth;
- int protocol, protocolmask;
- int scope, scopemask;
- int type, typemask;
- int tos, tosmask;
- int iif, iifmask;
- int oif, oifmask;
- int realm, realmmask;
- inet_prefix rprefsrc;
+ //int protocol, protocolmask; - write-only fields?!
+ //int scope, scopemask; - unused
+ //int type; - read-only
+ //int typemask; - unused
+ //int tos, tosmask; - unused
+ int iif;
+ int oif;
+ //int realm, realmmask; - unused
+ //inet_prefix rprefsrc; - read-only
inet_prefix rvia;
inet_prefix rdst;
inet_prefix mdst;
inet_prefix rsrc;
inet_prefix msrc;
-} filter;
+} FIX_ALIASING;
+typedef struct filter_t filter_t;
+
+#define G_filter (*(filter_t*)&bb_common_bufsiz1)
static int flush_update(void)
{
- if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
- perror("Failed to send flush request\n");
+ if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
+ bb_perror_msg("can't send flush request");
return -1;
}
- filter.flushp = 0;
+ G_filter.flushp = 0;
return 0;
}
-static int get_hz(void)
+static unsigned get_hz(void)
{
- static int hz_internal;
+ static unsigned hz_internal;
FILE *fp;
if (hz_internal)
return hz_internal;
- fp = fopen("/proc/net/psched", "r");
+ fp = fopen_for_read("/proc/net/psched");
if (fp) {
unsigned nom, denom;
return hz_internal;
}
-static int print_route(struct sockaddr_nl *who ATTRIBUTE_UNUSED,
- struct nlmsghdr *n, void *arg)
+static int FAST_FUNC print_route(const struct sockaddr_nl *who UNUSED_PARAM,
+ struct nlmsghdr *n, void *arg UNUSED_PARAM)
{
- FILE *fp = (FILE*)arg;
struct rtmsg *r = NLMSG_DATA(n);
int len = n->nlmsg_len;
- struct rtattr * tb[RTA_MAX+1];
+ struct rtattr *tb[RTA_MAX+1];
char abuf[256];
inet_prefix dst;
inet_prefix src;
int host_len = -1;
SPRINT_BUF(b1);
-
if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
fprintf(stderr, "Not a route: %08x %08x %08x\n",
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
return 0;
}
- if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
+ if (G_filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
return 0;
len -= NLMSG_LENGTH(sizeof(*r));
- if (len < 0) {
- bb_error_msg("wrong nlmsg len %d", len);
- return -1;
- }
+ if (len < 0)
+ bb_error_msg_and_die("wrong nlmsg len %d", len);
if (r->rtm_family == AF_INET6)
host_len = 128;
host_len = 32;
if (r->rtm_family == AF_INET6) {
- if (filter.tb) {
- if (filter.tb < 0) {
- if (!(r->rtm_flags&RTM_F_CLONED)) {
+ if (G_filter.tb) {
+ if (G_filter.tb < 0) {
+ if (!(r->rtm_flags & RTM_F_CLONED)) {
return 0;
}
} else {
- if (r->rtm_flags&RTM_F_CLONED) {
+ if (r->rtm_flags & RTM_F_CLONED) {
return 0;
}
- if (filter.tb == RT_TABLE_LOCAL) {
+ if (G_filter.tb == RT_TABLE_LOCAL) {
if (r->rtm_type != RTN_LOCAL) {
return 0;
}
- } else if (filter.tb == RT_TABLE_MAIN) {
+ } else if (G_filter.tb == RT_TABLE_MAIN) {
if (r->rtm_type == RTN_LOCAL) {
return 0;
}
}
}
} else {
- if (filter.tb > 0 && filter.tb != r->rtm_table) {
+ if (G_filter.tb > 0 && G_filter.tb != r->rtm_table) {
return 0;
}
}
- if (filter.rdst.family &&
- (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len)) {
+ if (G_filter.rdst.family
+ && (r->rtm_family != G_filter.rdst.family || G_filter.rdst.bitlen > r->rtm_dst_len)
+ ) {
return 0;
}
- if (filter.mdst.family &&
- (r->rtm_family != filter.mdst.family ||
- (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len))) {
+ if (G_filter.mdst.family
+ && (r->rtm_family != G_filter.mdst.family
+ || (G_filter.mdst.bitlen >= 0 && G_filter.mdst.bitlen < r->rtm_dst_len)
+ )
+ ) {
return 0;
}
- if (filter.rsrc.family &&
- (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len)) {
+ if (G_filter.rsrc.family
+ && (r->rtm_family != G_filter.rsrc.family || G_filter.rsrc.bitlen > r->rtm_src_len)
+ ) {
return 0;
}
- if (filter.msrc.family &&
- (r->rtm_family != filter.msrc.family ||
- (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len))) {
+ if (G_filter.msrc.family
+ && (r->rtm_family != G_filter.msrc.family
+ || (G_filter.msrc.bitlen >= 0 && G_filter.msrc.bitlen < r->rtm_src_len)
+ )
+ ) {
return 0;
}
memset(tb, 0, sizeof(tb));
+ memset(&src, 0, sizeof(src));
+ memset(&dst, 0, sizeof(dst));
parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
- if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
- return 0;
- if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
- inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
- return 0;
+ if (tb[RTA_SRC]) {
+ src.bitlen = r->rtm_src_len;
+ src.bytelen = (r->rtm_family == AF_INET6 ? 16 : 4);
+ memcpy(src.data, RTA_DATA(tb[RTA_SRC]), src.bytelen);
+ }
+ if (tb[RTA_DST]) {
+ dst.bitlen = r->rtm_dst_len;
+ dst.bytelen = (r->rtm_family == AF_INET6 ? 16 : 4);
+ memcpy(dst.data, RTA_DATA(tb[RTA_DST]), dst.bytelen);
+ }
- if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
+ if (G_filter.rdst.family
+ && inet_addr_match(&dst, &G_filter.rdst, G_filter.rdst.bitlen)
+ ) {
+ return 0;
+ }
+ if (G_filter.mdst.family
+ && G_filter.mdst.bitlen >= 0
+ && inet_addr_match(&dst, &G_filter.mdst, r->rtm_dst_len)
+ ) {
return 0;
- if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
- inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
+ }
+ if (G_filter.rsrc.family
+ && inet_addr_match(&src, &G_filter.rsrc, G_filter.rsrc.bitlen)
+ ) {
return 0;
-
- if (filter.flushb &&
- r->rtm_family == AF_INET6 &&
- r->rtm_dst_len == 0 &&
- r->rtm_type == RTN_UNREACHABLE &&
- tb[RTA_PRIORITY] &&
- *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
+ }
+ if (G_filter.msrc.family && G_filter.msrc.bitlen >= 0
+ && inet_addr_match(&src, &G_filter.msrc, r->rtm_src_len)
+ ) {
return 0;
+ }
+ if (G_filter.oif != 0) {
+ if (!tb[RTA_OIF])
+ return 0;
+ if (G_filter.oif != *(int*)RTA_DATA(tb[RTA_OIF]))
+ return 0;
+ }
- if (filter.flushb) {
+ if (G_filter.flushb) {
struct nlmsghdr *fn;
- if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
+
+ /* We are creating route flush commands */
+
+ if (r->rtm_family == AF_INET6
+ && r->rtm_dst_len == 0
+ && r->rtm_type == RTN_UNREACHABLE
+ && tb[RTA_PRIORITY]
+ && *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1
+ ) {
+ return 0;
+ }
+
+ if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
if (flush_update())
- return -1;
+ bb_error_msg_and_die("flush");
}
- fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
+ fn = (void*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
memcpy(fn, n, n->nlmsg_len);
fn->nlmsg_type = RTM_DELROUTE;
fn->nlmsg_flags = NLM_F_REQUEST;
- fn->nlmsg_seq = ++filter.rth->seq;
- filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
- filter.flushed++;
+ fn->nlmsg_seq = ++G_filter.rth->seq;
+ G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
+ G_filter.flushed = 1;
return 0;
}
+ /* We are printing routes */
+
if (n->nlmsg_type == RTM_DELROUTE) {
- fprintf(fp, "Deleted ");
+ printf("Deleted ");
}
- if (r->rtm_type != RTN_UNICAST && !filter.type) {
- fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
+ if (r->rtm_type != RTN_UNICAST /* && !G_filter.type - always 0 */) {
+ printf("%s ", rtnl_rtntype_n2a(r->rtm_type, b1));
}
if (tb[RTA_DST]) {
if (r->rtm_dst_len != host_len) {
- fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_DST]),
- RTA_DATA(tb[RTA_DST]),
- abuf, sizeof(abuf)),
- r->rtm_dst_len
- );
+ printf("%s/%u ", rt_addr_n2a(r->rtm_family,
+ RTA_DATA(tb[RTA_DST]),
+ abuf, sizeof(abuf)),
+ r->rtm_dst_len
+ );
} else {
- fprintf(fp, "%s ", format_host(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_DST]),
- RTA_DATA(tb[RTA_DST]),
- abuf, sizeof(abuf))
- );
+ printf("%s ", format_host(r->rtm_family,
+ RTA_PAYLOAD(tb[RTA_DST]),
+ RTA_DATA(tb[RTA_DST]),
+ abuf, sizeof(abuf))
+ );
}
} else if (r->rtm_dst_len) {
- fprintf(fp, "0/%d ", r->rtm_dst_len);
+ printf("0/%d ", r->rtm_dst_len);
} else {
- fprintf(fp, "default ");
+ printf("default ");
}
if (tb[RTA_SRC]) {
if (r->rtm_src_len != host_len) {
- fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_SRC]),
- RTA_DATA(tb[RTA_SRC]),
- abuf, sizeof(abuf)),
- r->rtm_src_len
- );
+ printf("from %s/%u ", rt_addr_n2a(r->rtm_family,
+ RTA_DATA(tb[RTA_SRC]),
+ abuf, sizeof(abuf)),
+ r->rtm_src_len
+ );
} else {
- fprintf(fp, "from %s ", format_host(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_SRC]),
- RTA_DATA(tb[RTA_SRC]),
- abuf, sizeof(abuf))
- );
+ printf("from %s ", format_host(r->rtm_family,
+ RTA_PAYLOAD(tb[RTA_SRC]),
+ RTA_DATA(tb[RTA_SRC]),
+ abuf, sizeof(abuf))
+ );
}
} else if (r->rtm_src_len) {
- fprintf(fp, "from 0/%u ", r->rtm_src_len);
+ printf("from 0/%u ", r->rtm_src_len);
}
- if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
- fprintf(fp, "via %s ",
- format_host(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_GATEWAY]),
- RTA_DATA(tb[RTA_GATEWAY]),
- abuf, sizeof(abuf)));
+ if (tb[RTA_GATEWAY] && G_filter.rvia.bitlen != host_len) {
+ printf("via %s ", format_host(r->rtm_family,
+ RTA_PAYLOAD(tb[RTA_GATEWAY]),
+ RTA_DATA(tb[RTA_GATEWAY]),
+ abuf, sizeof(abuf)));
}
- if (tb[RTA_OIF] && filter.oifmask != -1) {
- fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
+ if (tb[RTA_OIF]) {
+ printf("dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
}
- if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
+ /* Todo: parse & show "proto kernel", "scope link" here */
+
+ if (tb[RTA_PREFSRC] && /*G_filter.rprefsrc.bitlen - always 0*/ 0 != host_len) {
/* Do not use format_host(). It is our local addr
and symbolic name will not be useful.
*/
- fprintf(fp, " src %s ",
- rt_addr_n2a(r->rtm_family,
- RTA_PAYLOAD(tb[RTA_PREFSRC]),
- RTA_DATA(tb[RTA_PREFSRC]),
- abuf, sizeof(abuf)));
+ printf(" src %s ", rt_addr_n2a(r->rtm_family,
+ RTA_DATA(tb[RTA_PREFSRC]),
+ abuf, sizeof(abuf)));
}
if (tb[RTA_PRIORITY]) {
- fprintf(fp, " metric %d ", *(uint32_t*)RTA_DATA(tb[RTA_PRIORITY]));
+ printf(" metric %d ", *(uint32_t*)RTA_DATA(tb[RTA_PRIORITY]));
}
if (r->rtm_family == AF_INET6) {
struct rta_cacheinfo *ci = NULL;
ci = RTA_DATA(tb[RTA_CACHEINFO]);
}
if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
- static int hz;
- if (!hz) {
- hz = get_hz();
- }
if (r->rtm_flags & RTM_F_CLONED) {
- fprintf(fp, "%s cache ", _SL_);
+ printf("%c cache ", _SL_);
}
if (ci->rta_expires) {
- fprintf(fp, " expires %dsec", ci->rta_expires/hz);
+ printf(" expires %dsec", ci->rta_expires / get_hz());
}
if (ci->rta_error != 0) {
- fprintf(fp, " error %d", ci->rta_error);
+ printf(" error %d", ci->rta_error);
}
} else if (ci) {
if (ci->rta_error != 0)
- fprintf(fp, " error %d", ci->rta_error);
+ printf(" error %d", ci->rta_error);
}
}
- if (tb[RTA_IIF] && filter.iifmask != -1) {
- fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
+ if (tb[RTA_IIF] && G_filter.iif == 0) {
+ printf(" iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
}
- fprintf(fp, "\n");
- fflush(fp);
+ bb_putchar('\n');
return 0;
}
-static int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
+/* Return value becomes exitcode. It's okay to not return at all */
+static int iproute_modify(int cmd, unsigned flags, char **argv)
{
+ static const char keywords[] ALIGN1 =
+ "src\0""via\0""mtu\0""lock\0""protocol\0"IF_FEATURE_IP_RULE("table\0")
+ "dev\0""oif\0""to\0""metric\0";
+ enum {
+ ARG_src,
+ ARG_via,
+ ARG_mtu, PARM_lock,
+ ARG_protocol,
+IF_FEATURE_IP_RULE(ARG_table,)
+ ARG_dev,
+ ARG_oif,
+ ARG_to,
+ ARG_metric,
+ };
+ enum {
+ gw_ok = 1 << 0,
+ dst_ok = 1 << 1,
+ proto_ok = 1 << 2,
+ type_ok = 1 << 3
+ };
struct rtnl_handle rth;
struct {
- struct nlmsghdr n;
- struct rtmsg r;
- char buf[1024];
+ struct nlmsghdr n;
+ struct rtmsg r;
+ char buf[1024];
} req;
- char mxbuf[256];
+ char mxbuf[256];
struct rtattr * mxrta = (void*)mxbuf;
unsigned mxlock = 0;
- char *d = NULL;
- int gw_ok = 0;
- int dst_ok = 0;
- int proto_ok = 0;
- int type_ok = 0;
+ char *d = NULL;
+ smalluint ok = 0;
+ int arg;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
- req.n.nlmsg_flags = NLM_F_REQUEST|flags;
+ req.n.nlmsg_flags = NLM_F_REQUEST | flags;
req.n.nlmsg_type = cmd;
req.r.rtm_family = preferred_family;
- req.r.rtm_table = RT_TABLE_MAIN;
- req.r.rtm_scope = RT_SCOPE_NOWHERE;
+ if (RT_TABLE_MAIN) /* if it is zero, memset already did it */
+ req.r.rtm_table = RT_TABLE_MAIN;
+ if (RT_SCOPE_NOWHERE)
+ req.r.rtm_scope = RT_SCOPE_NOWHERE;
if (cmd != RTM_DELROUTE) {
req.r.rtm_protocol = RTPROT_BOOT;
mxrta->rta_type = RTA_METRICS;
mxrta->rta_len = RTA_LENGTH(0);
- while (argc > 0) {
- if (strcmp(*argv, "src") == 0) {
+ while (*argv) {
+ arg = index_in_substrings(keywords, *argv);
+ if (arg == ARG_src) {
inet_prefix addr;
NEXT_ARG();
get_addr(&addr, *argv, req.r.rtm_family);
- if (req.r.rtm_family == AF_UNSPEC) {
+ if (req.r.rtm_family == AF_UNSPEC)
req.r.rtm_family = addr.family;
- }
addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
- } else if (strcmp(*argv, "via") == 0) {
+ } else if (arg == ARG_via) {
inet_prefix addr;
- gw_ok = 1;
+ ok |= gw_ok;
NEXT_ARG();
get_addr(&addr, *argv, req.r.rtm_family);
if (req.r.rtm_family == AF_UNSPEC) {
req.r.rtm_family = addr.family;
}
addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
- } else if (strcmp(*argv, "mtu") == 0) {
+ } else if (arg == ARG_mtu) {
unsigned mtu;
NEXT_ARG();
- if (strcmp(*argv, "lock") == 0) {
- mxlock |= (1<<RTAX_MTU);
+ if (index_in_strings(keywords, *argv) == PARM_lock) {
+ mxlock |= (1 << RTAX_MTU);
NEXT_ARG();
}
- if (get_unsigned(&mtu, *argv, 0)) {
- invarg(*argv, "mtu");
- }
+ mtu = get_unsigned(*argv, "mtu");
rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
- } else if (matches(*argv, "protocol") == 0) {
+ } else if (arg == ARG_protocol) {
uint32_t prot;
NEXT_ARG();
if (rtnl_rtprot_a2n(&prot, *argv))
invarg(*argv, "protocol");
req.r.rtm_protocol = prot;
- proto_ok =1;
+ ok |= proto_ok;
#if ENABLE_FEATURE_IP_RULE
- } else if (matches(*argv, "table") == 0) {
+ } else if (arg == ARG_table) {
uint32_t tid;
NEXT_ARG();
if (rtnl_rttable_a2n(&tid, *argv))
invarg(*argv, "table");
req.r.rtm_table = tid;
#endif
- } else if (strcmp(*argv, "dev") == 0 ||
- strcmp(*argv, "oif") == 0) {
+ } else if (arg == ARG_dev || arg == ARG_oif) {
NEXT_ARG();
d = *argv;
+ } else if (arg == ARG_metric) {
+ uint32_t metric;
+ NEXT_ARG();
+ metric = get_u32(*argv, "metric");
+ addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
} else {
int type;
inet_prefix dst;
- if (strcmp(*argv, "to") == 0) {
+ if (arg == ARG_to) {
NEXT_ARG();
}
- if ((**argv < '0' || **argv > '9') &&
- rtnl_rtntype_a2n(&type, *argv) == 0) {
+ if ((**argv < '0' || **argv > '9')
+ && rtnl_rtntype_a2n(&type, *argv) == 0
+ ) {
NEXT_ARG();
req.r.rtm_type = type;
- type_ok = 1;
+ ok |= type_ok;
}
- if (dst_ok) {
+ if (ok & dst_ok) {
duparg2("to", *argv);
}
get_prefix(&dst, *argv, req.r.rtm_family);
req.r.rtm_family = dst.family;
}
req.r.rtm_dst_len = dst.bitlen;
- dst_ok = 1;
+ ok |= dst_ok;
if (dst.bytelen) {
addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
}
}
- argc--; argv++;
+ argv++;
}
- if (rtnl_open(&rth, 0) < 0) {
- exit(1);
- }
+ xrtnl_open(&rth);
if (d) {
int idx;
ll_init_map(&rth);
if (d) {
- idx = ll_name_to_index(d);
- if (idx == 0) {
- bb_error_msg("cannot find device \"%s\"", d);
- return -1;
- }
+ idx = xll_name_to_index(d);
addattr32(&req.n, sizeof(req), RTA_OIF, idx);
}
}
addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
}
+ if (req.r.rtm_type == RTN_LOCAL || req.r.rtm_type == RTN_NAT)
+ req.r.rtm_scope = RT_SCOPE_HOST;
+ else
+ if (req.r.rtm_type == RTN_BROADCAST
+ || req.r.rtm_type == RTN_MULTICAST
+ || req.r.rtm_type == RTN_ANYCAST
+ ) {
+ req.r.rtm_scope = RT_SCOPE_LINK;
+ }
+ else if (req.r.rtm_type == RTN_UNICAST || req.r.rtm_type == RTN_UNSPEC) {
+ if (cmd == RTM_DELROUTE)
+ req.r.rtm_scope = RT_SCOPE_NOWHERE;
+ else if (!(ok & gw_ok))
+ req.r.rtm_scope = RT_SCOPE_LINK;
+ }
+
if (req.r.rtm_family == AF_UNSPEC) {
req.r.rtm_family = AF_INET;
}
if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) {
- exit(2);
+ return 2;
}
return 0;
nladdr.nl_family = AF_NETLINK;
req.nlh.nlmsg_len = sizeof(req);
- req.nlh.nlmsg_type = RTM_GETROUTE;
- req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
- req.nlh.nlmsg_pid = 0;
+ if (RTM_GETROUTE)
+ req.nlh.nlmsg_type = RTM_GETROUTE;
+ if (NLM_F_ROOT | NLM_F_REQUEST)
+ req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST;
+ /*req.nlh.nlmsg_pid = 0; - memset did it already */
req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
req.rtm.rtm_family = family;
- req.rtm.rtm_flags |= RTM_F_CLONED;
+ if (RTM_F_CLONED)
+ req.rtm.rtm_flags = RTM_F_CLONED;
- return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
+ return xsendto(rth->fd, (void*)&req, sizeof(req), (struct sockaddr*)&nladdr, sizeof(nladdr));
}
-static int iproute_flush_cache(void)
+static void iproute_flush_cache(void)
{
-#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
-
- int len;
- int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
- char *buffer = "-1";
+ static const char fn[] ALIGN1 = "/proc/sys/net/ipv4/route/flush";
+ int flush_fd = open_or_warn(fn, O_WRONLY);
if (flush_fd < 0) {
- fprintf(stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
- return -1;
+ return;
}
- len = strlen (buffer);
-
- if ((write (flush_fd, (void *)buffer, len)) < len) {
- fprintf(stderr, "Cannot flush routing cache\n");
- return -1;
+ if (write(flush_fd, "-1", 2) < 2) {
+ bb_perror_msg("can't flush routing cache");
+ return;
}
close(flush_fd);
- return 0;
}
static void iproute_reset_filter(void)
{
- memset(&filter, 0, sizeof(filter));
- filter.mdst.bitlen = -1;
- filter.msrc.bitlen = -1;
+ memset(&G_filter, 0, sizeof(G_filter));
+ G_filter.mdst.bitlen = -1;
+ G_filter.msrc.bitlen = -1;
}
-static int iproute_list_or_flush(int argc, char **argv, int flush)
+/* Return value becomes exitcode. It's okay to not return at all */
+static int iproute_list_or_flush(char **argv, int flush)
{
int do_ipv6 = preferred_family;
struct rtnl_handle rth;
char *id = NULL;
char *od = NULL;
+ static const char keywords[] ALIGN1 =
+ /* "ip route list/flush" parameters: */
+ "protocol\0" "dev\0" "oif\0" "iif\0"
+ "via\0" "table\0" "cache\0"
+ "from\0" "to\0"
+ /* and possible further keywords */
+ "all\0"
+ "root\0"
+ "match\0"
+ "exact\0"
+ "main\0"
+ ;
+ enum {
+ KW_proto, KW_dev, KW_oif, KW_iif,
+ KW_via, KW_table, KW_cache,
+ KW_from, KW_to,
+ /* */
+ KW_all,
+ KW_root,
+ KW_match,
+ KW_exact,
+ KW_main,
+ };
+ int arg, parm;
iproute_reset_filter();
- filter.tb = RT_TABLE_MAIN;
+ G_filter.tb = RT_TABLE_MAIN;
- if (flush && argc <= 0) {
- bb_error_msg(bb_msg_requires_arg, "\"ip route flush\"");
- return -1;
- }
+ if (flush && !*argv)
+ bb_error_msg_and_die(bb_msg_requires_arg, "\"ip route flush\"");
- while (argc > 0) {
- if (matches(*argv, "protocol") == 0) {
+ while (*argv) {
+ arg = index_in_substrings(keywords, *argv);
+ if (arg == KW_proto) {
uint32_t prot = 0;
NEXT_ARG();
- filter.protocolmask = -1;
+ //G_filter.protocolmask = -1;
if (rtnl_rtprot_a2n(&prot, *argv)) {
- if (strcmp(*argv, "all") != 0) {
+ if (index_in_strings(keywords, *argv) != KW_all)
invarg(*argv, "protocol");
- }
prot = 0;
- filter.protocolmask = 0;
+ //G_filter.protocolmask = 0;
}
- filter.protocol = prot;
- } else if (strcmp(*argv, "dev") == 0 ||
- strcmp(*argv, "oif") == 0) {
+ //G_filter.protocol = prot;
+ } else if (arg == KW_dev || arg == KW_oif) {
NEXT_ARG();
od = *argv;
- } else if (strcmp(*argv, "iif") == 0) {
+ } else if (arg == KW_iif) {
NEXT_ARG();
id = *argv;
- } else if (matches(*argv, "from") == 0) {
+ } else if (arg == KW_via) {
+ NEXT_ARG();
+ get_prefix(&G_filter.rvia, *argv, do_ipv6);
+ } else if (arg == KW_table) { /* table all/cache/main */
+ NEXT_ARG();
+ parm = index_in_substrings(keywords, *argv);
+ if (parm == KW_cache)
+ G_filter.tb = -1;
+ else if (parm == KW_all)
+ G_filter.tb = 0;
+ else if (parm != KW_main) {
+#if ENABLE_FEATURE_IP_RULE
+ uint32_t tid;
+ if (rtnl_rttable_a2n(&tid, *argv))
+ invarg(*argv, "table");
+ G_filter.tb = tid;
+#else
+ invarg(*argv, "table");
+#endif
+ }
+ } else if (arg == KW_cache) {
+ /* The command 'ip route flush cache' is used by OpenSWAN.
+ * Assuming it's a synonym for 'ip route flush table cache' */
+ G_filter.tb = -1;
+ } else if (arg == KW_from) {
NEXT_ARG();
- if (matches(*argv, "root") == 0) {
+ parm = index_in_substrings(keywords, *argv);
+ if (parm == KW_root) {
NEXT_ARG();
- get_prefix(&filter.rsrc, *argv, do_ipv6);
- } else if (matches(*argv, "match") == 0) {
+ get_prefix(&G_filter.rsrc, *argv, do_ipv6);
+ } else if (parm == KW_match) {
NEXT_ARG();
- get_prefix(&filter.msrc, *argv, do_ipv6);
+ get_prefix(&G_filter.msrc, *argv, do_ipv6);
} else {
- if (matches(*argv, "exact") == 0) {
+ if (parm == KW_exact)
NEXT_ARG();
- }
- get_prefix(&filter.msrc, *argv, do_ipv6);
- filter.rsrc = filter.msrc;
+ get_prefix(&G_filter.msrc, *argv, do_ipv6);
+ G_filter.rsrc = G_filter.msrc;
}
- } else {
- if (matches(*argv, "to") == 0) {
+ } else { /* "to" is the default parameter */
+ if (arg == KW_to) {
NEXT_ARG();
+ arg = index_in_substrings(keywords, *argv);
}
- if (matches(*argv, "root") == 0) {
- NEXT_ARG();
- get_prefix(&filter.rdst, *argv, do_ipv6);
- } else if (matches(*argv, "match") == 0) {
+ /* parm = arg; - would be more plausible, but we reuse 'arg' here */
+ if (arg == KW_root) {
NEXT_ARG();
- get_prefix(&filter.mdst, *argv, do_ipv6);
- } else if (matches(*argv, "table") == 0) {
+ get_prefix(&G_filter.rdst, *argv, do_ipv6);
+ } else if (arg == KW_match) {
NEXT_ARG();
- if (matches(*argv, "cache") == 0) {
- filter.tb = -1;
-#if 0 && ENABLE_FEATURE_IP_RULE
-
-#else
- } else if (matches(*argv, "main") != 0) {
- invarg(*argv, "table");
- }
-#endif
- } else if (matches(*argv, "cache") == 0) {
- filter.tb = -1;
- } else {
- if (matches(*argv, "exact") == 0) {
+ get_prefix(&G_filter.mdst, *argv, do_ipv6);
+ } else { /* "to exact" is the default */
+ if (arg == KW_exact)
NEXT_ARG();
- }
- get_prefix(&filter.mdst, *argv, do_ipv6);
- filter.rdst = filter.mdst;
+ get_prefix(&G_filter.mdst, *argv, do_ipv6);
+ G_filter.rdst = G_filter.mdst;
}
}
- argc--; argv++;
+ argv++;
}
- if (do_ipv6 == AF_UNSPEC && filter.tb) {
+ if (do_ipv6 == AF_UNSPEC && G_filter.tb) {
do_ipv6 = AF_INET;
}
- if (rtnl_open(&rth, 0) < 0) {
- exit(1);
- }
-
+ xrtnl_open(&rth);
ll_init_map(&rth);
if (id || od) {
int idx;
if (id) {
- if ((idx = ll_name_to_index(id)) == 0) {
- bb_error_msg("cannot find device \"%s\"", id);
- return -1;
- }
- filter.iif = idx;
- filter.iifmask = -1;
+ idx = xll_name_to_index(id);
+ G_filter.iif = idx;
}
if (od) {
- if ((idx = ll_name_to_index(od)) == 0) {
- bb_error_msg("cannot find device \"%s\"", od);
- }
- filter.oif = idx;
- filter.oifmask = -1;
+ idx = xll_name_to_index(od);
+ G_filter.oif = idx;
}
}
if (flush) {
char flushb[4096-512];
- if (filter.tb == -1) {
+ if (G_filter.tb == -1) { /* "flush table cache" */
if (do_ipv6 != AF_INET6)
iproute_flush_cache();
if (do_ipv6 == AF_INET)
return 0;
}
- filter.flushb = flushb;
- filter.flushp = 0;
- filter.flushe = sizeof(flushb);
- filter.rth = &rth;
+ G_filter.flushb = flushb;
+ G_filter.flushp = 0;
+ G_filter.flushe = sizeof(flushb);
+ G_filter.rth = &rth;
for (;;) {
- if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
- perror("Cannot send dump request");
- return -1;
- }
- filter.flushed = 0;
- if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
- bb_error_msg("flush terminated");
- return -1;
- }
- if (filter.flushed == 0) {
- fflush(stdout);
+ xrtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE);
+ G_filter.flushed = 0;
+ xrtnl_dump_filter(&rth, print_route, NULL);
+ if (G_filter.flushed == 0)
return 0;
- }
- if (flush_update() < 0)
- exit(1);
- }
- }
-
- if (filter.tb != -1) {
- if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
- bb_perror_msg_and_die("cannot send dump request");
- }
- } else {
- if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
- bb_perror_msg_and_die("cannot send dump request");
+ if (flush_update())
+ return 1;
}
}
- if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
- bb_error_msg_and_die("dump terminated");
+ if (G_filter.tb != -1) {
+ xrtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE);
+ } else if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
+ bb_perror_msg_and_die("can't send dump request");
}
+ xrtnl_dump_filter(&rth, print_route, NULL);
- exit(0);
+ return 0;
}
-static int iproute_get(int argc, char **argv)
+/* Return value becomes exitcode. It's okay to not return at all */
+static int iproute_get(char **argv)
{
struct rtnl_handle rth;
struct {
- struct nlmsghdr n;
- struct rtmsg r;
- char buf[1024];
+ struct nlmsghdr n;
+ struct rtmsg r;
+ char buf[1024];
} req;
- char *idev = NULL;
- char *odev = NULL;
- int connected = 0;
- int from_ok = 0;
- static const char * const options[] =
- { "from", "iif", "oif", "dev", "notify", "connected", "to", 0 };
+ char *idev = NULL;
+ char *odev = NULL;
+ bool connected = 0;
+ bool from_ok = 0;
+ static const char options[] ALIGN1 =
+ "from\0""iif\0""oif\0""dev\0""notify\0""connected\0""to\0";
memset(&req, 0, sizeof(req));
iproute_reset_filter();
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
- req.n.nlmsg_flags = NLM_F_REQUEST;
- req.n.nlmsg_type = RTM_GETROUTE;
+ if (NLM_F_REQUEST)
+ req.n.nlmsg_flags = NLM_F_REQUEST;
+ if (RTM_GETROUTE)
+ req.n.nlmsg_type = RTM_GETROUTE;
req.r.rtm_family = preferred_family;
- req.r.rtm_table = 0;
- req.r.rtm_protocol = 0;
- req.r.rtm_scope = 0;
- req.r.rtm_type = 0;
- req.r.rtm_src_len = 0;
- req.r.rtm_dst_len = 0;
- req.r.rtm_tos = 0;
-
- while (argc > 0) {
- switch (index_in_str_array(options, *argv)) {
+ /*req.r.rtm_table = 0; - memset did this already */
+ /*req.r.rtm_protocol = 0;*/
+ /*req.r.rtm_scope = 0;*/
+ /*req.r.rtm_type = 0;*/
+ /*req.r.rtm_src_len = 0;*/
+ /*req.r.rtm_dst_len = 0;*/
+ /*req.r.rtm_tos = 0;*/
+
+ while (*argv) {
+ switch (index_in_strings(options, *argv)) {
case 0: /* from */
{
inet_prefix addr;
}
req.r.rtm_dst_len = addr.bitlen;
}
- argc--; argv++;
}
+ argv++;
}
if (req.r.rtm_dst_len == 0) {
bb_error_msg_and_die("need at least destination address");
}
- if (rtnl_open(&rth, 0) < 0)
- exit(1);
+ xrtnl_open(&rth);
ll_init_map(&rth);
int idx;
if (idev) {
- if ((idx = ll_name_to_index(idev)) == 0) {
- bb_error_msg("cannot find device \"%s\"", idev);
- return -1;
- }
+ idx = xll_name_to_index(idev);
addattr32(&req.n, sizeof(req), RTA_IIF, idx);
}
if (odev) {
- if ((idx = ll_name_to_index(odev)) == 0) {
- bb_error_msg("cannot find device \"%s\"", odev);
- return -1;
- }
+ idx = xll_name_to_index(odev);
addattr32(&req.n, sizeof(req), RTA_OIF, idx);
}
}
}
if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) {
- exit(2);
+ return 2;
}
if (connected && !from_ok) {
int len = req.n.nlmsg_len;
struct rtattr * tb[RTA_MAX+1];
- if (print_route(NULL, &req.n, (void*)stdout) < 0) {
- bb_error_msg_and_die("an error :-)");
- }
+ print_route(NULL, &req.n, NULL);
if (req.n.nlmsg_type != RTM_NEWROUTE) {
- bb_error_msg("not a route?");
- return -1;
+ bb_error_msg_and_die("not a route?");
}
len -= NLMSG_LENGTH(sizeof(*r));
if (len < 0) {
- bb_error_msg("wrong len %d", len);
- return -1;
+ bb_error_msg_and_die("wrong len %d", len);
}
memset(tb, 0, sizeof(tb));
tb[RTA_PREFSRC]->rta_type = RTA_SRC;
r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
} else if (!tb[RTA_SRC]) {
- bb_error_msg("failed to connect the route");
- return -1;
+ bb_error_msg_and_die("can't connect the route");
}
if (!odev && tb[RTA_OIF]) {
tb[RTA_OIF]->rta_type = 0;
req.n.nlmsg_type = RTM_GETROUTE;
if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) {
- exit(2);
+ return 2;
}
}
-
- if (print_route(NULL, &req.n, (void*)stdout) < 0) {
- bb_error_msg_and_die("an error :-)");
- }
-
- exit(0);
+ print_route(NULL, &req.n, NULL);
+ return 0;
}
-int do_iproute(int argc, char **argv)
+/* Return value becomes exitcode. It's okay to not return at all */
+int FAST_FUNC do_iproute(char **argv)
{
- static const char * const ip_route_commands[] =
- { "add", "append", "change", "chg", "delete", "get",
- "list", "show", "prepend", "replace", "test", "flush", 0 };
- int command_num = 6;
- unsigned int flags = 0;
+ static const char ip_route_commands[] ALIGN1 =
+ /*0-3*/ "add\0""append\0""change\0""chg\0"
+ /*4-7*/ "delete\0""get\0""list\0""show\0"
+ /*8..*/ "prepend\0""replace\0""test\0""flush\0";
+ int command_num;
+ unsigned flags = 0;
int cmd = RTM_NEWROUTE;
+ if (!*argv)
+ return iproute_list_or_flush(argv, 0);
+
/* "Standard" 'ip r a' treats 'a' as 'add', not 'append' */
/* It probably means that it is using "first match" rule */
- if (*argv) {
- command_num = index_in_substr_array(ip_route_commands, *argv);
- }
+ command_num = index_in_substrings(ip_route_commands, *argv);
+
switch (command_num) {
- case 0: /* add*/
+ case 0: /* add */
flags = NLM_F_CREATE|NLM_F_EXCL;
break;
case 1: /* append */
flags = NLM_F_REPLACE;
break;
case 4: /* delete */
- case 5: /* del */
cmd = RTM_DELROUTE;
break;
- case 6: /* get */
- return iproute_get(argc-1, argv+1);
- case 7: /* list */
- case 8: /* show */
- return iproute_list_or_flush(argc-1, argv+1, 0);
- case 9: /* prepend */
+ case 5: /* get */
+ return iproute_get(argv+1);
+ case 6: /* list */
+ case 7: /* show */
+ return iproute_list_or_flush(argv+1, 0);
+ case 8: /* prepend */
flags = NLM_F_CREATE;
- case 10: /* replace */
+ break;
+ case 9: /* replace */
flags = NLM_F_CREATE|NLM_F_REPLACE;
- case 11: /* test */
+ break;
+ case 10: /* test */
flags = NLM_F_EXCL;
- case 12: /* flush */
- return iproute_list_or_flush(argc-1, argv+1, 1);
+ break;
+ case 11: /* flush */
+ return iproute_list_or_flush(argv+1, 1);
default:
bb_error_msg_and_die("unknown command %s", *argv);
}
- return iproute_modify(cmd, flags, argc-1, argv+1);
+ return iproute_modify(cmd, flags, argv+1);
}
projects / oweals / busybox.git / blobdiff