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https://github.com/sheumann/hush.git
synced 2024-06-25 11:29:31 +00:00
Patch from Bastian Blank
- ip route flush - different usage for telnetd in inetd mode - changes for the default flags of the ip features - if no /usr requested, udhcpc should use the script also without /usr.
This commit is contained in:
Glenn L McGrath
parent
3238ea1673
commit
4a4c677fcc
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@ -2084,6 +2084,14 @@
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"Telnet is used to establish interactive communication with another\n"\
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"computer over a network using the TELNET protocol."
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#ifdef CONFIG_FEATURE_TELNETD_INETD
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#define telnetd_trivial_usage \
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"(inetd mode) [OPTION]"
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#define telnetd_full_usage \
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"Telnetd uses incoming TELNET connections via inetd.\n"\
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"Options:\n" \
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"\t-l LOGIN\texec LOGIN on connect (default /bin/sh)"
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#else
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#define telnetd_trivial_usage \
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"[OPTION]"
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#define telnetd_full_usage \
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@ -2091,6 +2099,7 @@
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"Options:\n" \
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"\t-p PORT\tlisten for connections on PORT (default 23)\n"\
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"\t-l LOGIN\texec LOGIN on connect (default /bin/sh)"
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#endif
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#define test_trivial_usage \
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"EXPRESSION\n or [ EXPRESSION ]"
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@ -257,7 +257,7 @@ endif
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if ! (CONFIG_IP && CONFIG_IPADDR)
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config CONFIG_FEATURE_IP_ADDRESS
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bool " address"
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default n
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default y
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depends on CONFIG_IP
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help
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Please submit a patch to add help text for this item.
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@ -299,7 +299,7 @@ endif
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if !(CONFIG_IP && CONFIG_IPTUNNEL)
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config CONFIG_FEATURE_IP_TUNNEL
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bool " tunnel"
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default y
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default n
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depends on CONFIG_IP
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help
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Please submit a patch to add help text for this item.
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@ -19,6 +19,8 @@
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "rt_names.h"
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#include "utils.h"
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@ -33,6 +35,8 @@
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static struct
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{
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int tb;
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int flushed;
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char *flushb;
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int flushp;
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int flushe;
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struct rtnl_handle *rth;
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@ -51,6 +55,16 @@ static struct
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inet_prefix msrc;
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} filter;
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static int flush_update(void)
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{
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if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
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perror("Failed to send flush request\n");
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return -1;
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}
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filter.flushp = 0;
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return 0;
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}
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static int print_route(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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{
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FILE *fp = (FILE*)arg;
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@ -67,6 +81,8 @@ static int print_route(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
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return 0;
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}
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if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
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return 0;
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len -= NLMSG_LENGTH(sizeof(*r));
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if (len < 0) {
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error_msg("wrong nlmsg len %d", len);
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@ -128,6 +144,30 @@ static int print_route(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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memset(tb, 0, sizeof(tb));
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parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
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if (filter.flushb &&
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r->rtm_family == AF_INET6 &&
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r->rtm_dst_len == 0 &&
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r->rtm_type == RTN_UNREACHABLE &&
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tb[RTA_PRIORITY] &&
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*(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
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return 0;
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if (filter.flushb) {
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struct nlmsghdr *fn;
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if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
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if (flush_update())
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return -1;
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}
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fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
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memcpy(fn, n, n->nlmsg_len);
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fn->nlmsg_type = RTM_DELROUTE;
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fn->nlmsg_flags = NLM_F_REQUEST;
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fn->nlmsg_seq = ++filter.rth->seq;
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filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
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filter.flushed++;
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return 0;
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}
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if (n->nlmsg_type == RTM_DELROUTE) {
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fprintf(fp, "Deleted ");
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}
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@ -393,6 +433,29 @@ static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
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return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
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}
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static int iproute_flush_cache(void)
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{
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#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
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int len;
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int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
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char *buffer = "-1";
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if (flush_fd < 0) {
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fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
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return -1;
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}
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len = strlen (buffer);
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if ((write (flush_fd, (void *)buffer, len)) < len) {
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fprintf (stderr, "Cannot flush routing cache\n");
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return -1;
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}
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close(flush_fd);
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return 0;
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}
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static void iproute_reset_filter(void)
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{
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memset(&filter, 0, sizeof(filter));
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@ -400,7 +463,7 @@ static void iproute_reset_filter(void)
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filter.msrc.bitlen = -1;
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}
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static int iproute_list(int argc, char **argv)
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static int iproute_list_or_flush(int argc, char **argv, int flush)
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{
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int do_ipv6 = preferred_family;
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struct rtnl_handle rth;
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@ -410,6 +473,11 @@ static int iproute_list(int argc, char **argv)
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iproute_reset_filter();
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filter.tb = RT_TABLE_MAIN;
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if (flush && argc <= 0) {
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fprintf(stderr, "\"ip route flush\" requires arguments.\n");
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return -1;
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}
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while (argc > 0) {
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if (matches(*argv, "protocol") == 0) {
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int prot = 0;
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@ -496,6 +564,46 @@ static int iproute_list(int argc, char **argv)
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}
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}
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if (flush) {
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int round = 0;
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char flushb[4096-512];
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if (filter.tb == -1) {
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if (do_ipv6 != AF_INET6)
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iproute_flush_cache();
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if (do_ipv6 == AF_INET)
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return 0;
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}
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filter.flushb = flushb;
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filter.flushp = 0;
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filter.flushe = sizeof(flushb);
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filter.rth = &rth;
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for (;;) {
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if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
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perror("Cannot send dump request");
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return -1;
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}
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filter.flushed = 0;
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if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
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error_msg("Flush terminated\n");
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return -1;
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}
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if (filter.flushed == 0) {
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if (round == 0) {
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if (filter.tb != -1 || do_ipv6 == AF_INET6)
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fprintf(stderr, "Nothing to flush.\n");
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}
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fflush(stdout);
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return 0;
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}
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round++;
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if (flush_update() < 0)
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exit(1);
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}
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}
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if (filter.tb != -1) {
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if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
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perror_msg_and_die("Cannot send dump request");
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@ -686,7 +794,7 @@ static int iproute_get(int argc, char **argv)
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int do_iproute(int argc, char **argv)
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{
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const char *ip_route_commands[] = { "add", "append", "change", "chg",
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"delete", "get", "list", "show", "prepend", "replace", "test", 0 };
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"delete", "get", "list", "show", "prepend", "replace", "test", "flush", 0 };
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unsigned short command_num = 6;
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unsigned int flags = 0;
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int cmd = RTM_NEWROUTE;
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@ -712,13 +820,15 @@ int do_iproute(int argc, char **argv)
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return iproute_get(argc-1, argv+1);
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case 6: /* list */
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case 7: /* show */
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return iproute_list(argc-1, argv+1);
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return iproute_list_or_flush(argc-1, argv+1, 0);
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case 8: /* prepend */
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flags = NLM_F_CREATE;
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case 9: /* replace */
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flags = NLM_F_CREATE|NLM_F_REPLACE;
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case 10: /* test */
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flags = NLM_F_EXCL;
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case 11: /* flush */
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return iproute_list_or_flush(argc-1, argv+1, 1);
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default:
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error_msg_and_die("Unknown command %s", *argv);
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}
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@ -59,7 +59,11 @@ static int signal_pipe[2];
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#define LISTEN_RAW 2
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static int listen_mode;
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#ifdef CONFIG_INSTALL_NO_USR
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#define DEFAULT_SCRIPT "/share/udhcpc/default.script"
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#else
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#define DEFAULT_SCRIPT "/usr/share/udhcpc/default.script"
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#endif
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struct client_config_t client_config = {
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/* Default options. */
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