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-rw-r--r--extensions/libip6t_dst.c109
1 files changed, 54 insertions, 55 deletions
diff --git a/extensions/libip6t_dst.c b/extensions/libip6t_dst.c
index 7eb64cd..19ca23c 100644
--- a/extensions/libip6t_dst.c
+++ b/extensions/libip6t_dst.c
@@ -6,44 +6,37 @@
#include <getopt.h>
#include <errno.h>
#include <ip6tables.h>
-/*#include <linux/in6.h>*/
#include <linux/netfilter_ipv6/ip6t_opts.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
-
-#define DEBUG 0
-#define HOPBYHOP 0
-#define UNAME (HOPBYHOP ? "HBH" : "DST")
-#define LNAME (HOPBYHOP ? "hbh" : "dst")
+
+#ifdef HOPBYHOP
+#define UNAME "HBH"
+#define LNAME "hbh"
+#else
+#define UNAME "DST"
+#define LNAME "dst"
+#endif
/* Function which prints out usage message. */
static void
help(void)
{
printf(
-"%s v%s options:\n"
-" --%s-len [!] length total length of this header\n"
-" --%s-opts TYPE[:LEN][,TYPE[:LEN]...] \n"
+UNAME " v%s options:\n"
+" --" LNAME "-len [!] length total length of this header\n"
+" --" LNAME "-opts TYPE[:LEN][,TYPE[:LEN]...] \n"
" Options and its length (list, max: %d)\n",
-UNAME , IPTABLES_VERSION, LNAME, LNAME, IP6T_OPTS_OPTSNR);
+IPTABLES_VERSION, IP6T_OPTS_OPTSNR);
}
-#if HOPBYHOP
static struct option opts[] = {
- { .name = "hbh-len", .has_arg = 1, .flag = 0, .val = '1' },
- { .name = "hbh-opts", .has_arg = 1, .flag = 0, .val = '2' },
- { .name = "hbh-not-strict", .has_arg = 1, .flag = 0, .val = '3' },
+ { .name = LNAME "-len", .has_arg = 1, .flag = 0, .val = '1' },
+ { .name = LNAME "-opts", .has_arg = 1, .flag = 0, .val = '2' },
+ { .name = LNAME "-not-strict", .has_arg = 1, .flag = 0, .val = '3' },
{ .name = 0 }
};
-#else
-static struct option opts[] = {
- { .name = "dst-len", .has_arg = 1, .flag = 0, .val = '1' },
- { .name = "dst-opts", .has_arg = 1, .flag = 0, .val = '2' },
- { .name = "dst-not-strict", .has_arg = 1, .flag = 0, .val = '3' },
- { .name = 0 }
-};
-#endif
static u_int32_t
parse_opts_num(const char *idstr, const char *typestr)
@@ -55,16 +48,16 @@ parse_opts_num(const char *idstr, const char *typestr)
if ( idstr == ep ) {
exit_error(PARAMETER_PROBLEM,
- "%s no valid digits in %s `%s'", UNAME, typestr, idstr);
+ UNAME " no valid digits in %s `%s'", typestr, idstr);
}
if ( id == ULONG_MAX && errno == ERANGE ) {
exit_error(PARAMETER_PROBLEM,
"%s `%s' specified too big: would overflow",
typestr, idstr);
- }
+ }
if ( *idstr != '\0' && *ep != '\0' ) {
exit_error(PARAMETER_PROBLEM,
- "%s error parsing %s `%s'", UNAME, typestr, idstr);
+ UNAME " error parsing %s `%s'", typestr, idstr);
}
return (u_int32_t) id;
}
@@ -76,39 +69,47 @@ parse_options(const char *optsstr, u_int16_t *opts)
unsigned int i;
buffer = strdup(optsstr);
- if (!buffer) exit_error(OTHER_PROBLEM, "strdup failed");
+ if (!buffer)
+ exit_error(OTHER_PROBLEM, "strdup failed");
- for (cp=buffer, i=0; cp && i<IP6T_OPTS_OPTSNR; cp=next,i++)
+ for (cp = buffer, i = 0; cp && i < IP6T_OPTS_OPTSNR; cp = next, i++)
{
- next=strchr(cp, ',');
- if (next) *next++='\0';
+ next = strchr(cp, ',');
+
+ if (next)
+ *next++='\0';
+
range = strchr(cp, ':');
+
if (range) {
if (i == IP6T_OPTS_OPTSNR-1)
exit_error(PARAMETER_PROBLEM,
"too many ports specified");
*range++ = '\0';
}
+
opts[i] = (u_int16_t)((parse_opts_num(cp,"opt") & 0x000000FF)<<8);
if (range) {
if (opts[i] == 0)
- exit_error(PARAMETER_PROBLEM, "PAD0 hasn't got length");
+ exit_error(PARAMETER_PROBLEM,
+ "PAD0 hasn't got length");
opts[i] |= (u_int16_t)(parse_opts_num(range,"length") &
0x000000FF);
- } else {
+ } else
opts[i] |= (0x00FF);
- }
-#if DEBUG
+#ifdef DEBUG
printf("opts str: %s %s\n", cp, range);
printf("opts opt: %04X\n", opts[i]);
#endif
}
- if (cp) exit_error(PARAMETER_PROBLEM, "too many addresses specified");
+
+ if (cp)
+ exit_error(PARAMETER_PROBLEM, "too many addresses specified");
free(buffer);
-#if DEBUG
+#ifdef DEBUG
printf("addr nr: %d\n", i);
#endif
@@ -141,7 +142,7 @@ parse(int c, char **argv, int invert, unsigned int *flags,
case '1':
if (*flags & IP6T_OPTS_LEN)
exit_error(PARAMETER_PROBLEM,
- "Only one `--%s-len' allowed", LNAME);
+ "Only one `--" LNAME "-len' allowed");
check_inverse(optarg, &invert, &optind, 0);
optinfo->hdrlen = parse_opts_num(argv[optind-1], "length");
if (invert)
@@ -152,11 +153,11 @@ parse(int c, char **argv, int invert, unsigned int *flags,
case '2':
if (*flags & IP6T_OPTS_OPTS)
exit_error(PARAMETER_PROBLEM,
- "Only one `--%s-opts' allowed", LNAME);
+ "Only one `--" LNAME "-opts' allowed");
check_inverse(optarg, &invert, &optind, 0);
if (invert)
exit_error(PARAMETER_PROBLEM,
- " '!' not allowed with `--%s-opts'", LNAME);
+ " '!' not allowed with `--" LNAME "-opts'");
optinfo->optsnr = parse_options(argv[optind-1], optinfo->opts);
optinfo->flags |= IP6T_OPTS_OPTS;
*flags |= IP6T_OPTS_OPTS;
@@ -164,10 +165,11 @@ parse(int c, char **argv, int invert, unsigned int *flags,
case '3':
if (*flags & IP6T_OPTS_NSTRICT)
exit_error(PARAMETER_PROBLEM,
- "Only one `--%s-not-strict' allowed", LNAME);
+ "Only one `--" LNAME "-not-strict' allowed");
if ( !(*flags & IP6T_OPTS_OPTS) )
exit_error(PARAMETER_PROBLEM,
- "`--%s-opts ...' required before `--%s-not-strict'", LNAME, LNAME);
+ "`--" LNAME "-opts ...' required before `--"
+ LNAME "-not-strict'");
optinfo->flags |= IP6T_OPTS_NSTRICT;
*flags |= IP6T_OPTS_NSTRICT;
break;
@@ -189,12 +191,13 @@ print_options(int optsnr, u_int16_t *optsp)
{
unsigned int i;
- for(i=0; i<optsnr; i++){
- printf("%d", (optsp[i] & 0xFF00)>>8);
- if ((optsp[i] & 0x00FF) != 0x00FF){
+ for(i = 0; i < optsnr; i++) {
+ printf("%d", (optsp[i] & 0xFF00) >> 8);
+
+ if ((optsp[i] & 0x00FF) != 0x00FF)
printf(":%d", (optsp[i] & 0x00FF));
- }
- printf("%c", (i!=optsnr-1)?',':' ');
+
+ printf("%c", (i != optsnr - 1) ? ',' : ' ');
}
}
@@ -205,7 +208,7 @@ print(const struct ip6t_ip6 *ip,
{
const struct ip6t_opts *optinfo = (struct ip6t_opts *)match->data;
- printf("%s ", LNAME);
+ printf(LNAME " ");
if (optinfo->flags & IP6T_OPTS_LEN)
printf("length:%s%u ",
optinfo->invflags & IP6T_OPTS_INV_LEN ? "!" : "",
@@ -230,34 +233,30 @@ static void save(const struct ip6t_ip6 *ip, const struct ip6t_entry_match *match
const struct ip6t_opts *optinfo = (struct ip6t_opts *)match->data;
if (optinfo->flags & IP6T_OPTS_LEN) {
- printf("--%s-len %s%u ", LNAME,
+ printf("--" LNAME "-len %s%u ",
(optinfo->invflags & IP6T_OPTS_INV_LEN) ? "! " : "",
optinfo->hdrlen);
}
if (optinfo->flags & IP6T_OPTS_OPTS)
- printf("--%s-opts ", LNAME);
+ printf("--" LNAME "-opts ");
print_options(optinfo->optsnr, (u_int16_t *)optinfo->opts);
if (optinfo->flags & IP6T_OPTS_NSTRICT)
- printf("--%s-not-strict ", LNAME);
+ printf("--" LNAME "-not-strict ");
}
static
struct ip6tables_match optstruct = {
-#if HOPBYHOP
- .name = "hbh",
-#else
- .name = "dst",
-#endif
+ .name = LNAME,
.version = IPTABLES_VERSION,
.size = IP6T_ALIGN(sizeof(struct ip6t_opts)),
.userspacesize = IP6T_ALIGN(sizeof(struct ip6t_opts)),
.help = &help,
.init = &init,
.parse = &parse,
- .final = &final_check,
+ .final_check = &final_check,
.print = &print,
.save = &save,
.extra_opts = opts