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-rw-r--r--xtables.c89
1 files changed, 71 insertions, 18 deletions
diff --git a/xtables.c b/xtables.c
index 3c89a9d1..02bfc17a 100644
--- a/xtables.c
+++ b/xtables.c
@@ -55,6 +55,59 @@
#define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
#endif
+void basic_exit_err(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3)));
+
+struct xtables_globals *xt_params = NULL;
+
+void basic_exit_err(enum xtables_exittype status, const char *msg, ...)
+{
+ va_list args;
+
+ va_start(args, msg);
+ fprintf(stderr, "%s v%s: ", xt_params->program_name, xt_params->program_version);
+ vfprintf(stderr, msg, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+ exit(status);
+}
+
+
+/**
+ * xtables_set_params - set the global parameters used by xtables
+ * @xtp: input xtables_globals structure
+ *
+ * The app is expected to pass a valid xtables_globals data-filled
+ * with proper values
+ * @xtp cannot be NULL
+ *
+ * Returns -1 on failure to set and 0 on success
+ */
+int xtables_set_params(struct xtables_globals *xtp)
+{
+ if (!xtp) {
+ fprintf(stderr, "%s: Illegal global params\n",__func__);
+ return -1;
+ }
+
+ xt_params = xtp;
+
+ if (!xt_params->exit_err)
+ xt_params->exit_err = basic_exit_err;
+
+ return 0;
+}
+
+void xtables_free_opts(int reset_offset, struct option *original_opts)
+{
+ if (xt_params->opts != original_opts) {
+ if (original_opts)
+ free(xt_params->opts);
+ xt_params->opts = original_opts;
+ if (reset_offset)
+ xt_params->option_offset = 0;
+ }
+}
+
/**
* xtables_afinfo - protocol family dependent information
* @kmod: kernel module basename (e.g. "ip_tables")
@@ -331,7 +384,7 @@ u_int16_t xtables_parse_port(const char *port, const char *proto)
(portnum = xtables_service_to_port(port, proto)) != (unsigned)-1)
return portnum;
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"invalid port/service `%s' specified", port);
}
@@ -345,7 +398,7 @@ void xtables_parse_interface(const char *arg, char *vianame,
memset(vianame, 0, IFNAMSIZ);
if (vialen + 1 > IFNAMSIZ)
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"interface name `%s' must be shorter than IFNAMSIZ"
" (%i)", arg, IFNAMSIZ-1);
@@ -467,7 +520,7 @@ xtables_find_match(const char *name, enum xtables_tryload tryload,
name, false);
if (ptr == NULL && tryload == XTF_LOAD_MUST_SUCCEED)
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"Couldn't load match `%s':%s\n",
name, dlerror());
}
@@ -479,7 +532,7 @@ xtables_find_match(const char *name, enum xtables_tryload tryload,
ptr = NULL;
}
if(!ptr && (tryload == XTF_LOAD_MUST_SUCCEED)) {
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"Couldn't find match `%s'\n", name);
}
#endif
@@ -527,7 +580,7 @@ xtables_find_target(const char *name, enum xtables_tryload tryload)
name, true);
if (ptr == NULL && tryload == XTF_LOAD_MUST_SUCCEED)
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"Couldn't load target `%s':%s\n",
name, dlerror());
}
@@ -539,7 +592,7 @@ xtables_find_target(const char *name, enum xtables_tryload tryload)
ptr = NULL;
}
if(!ptr && (tryload == LOAD_MUST_SUCCEED)) {
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"Couldn't find target `%s'\n", name);
}
#endif
@@ -792,7 +845,7 @@ void xtables_param_act(unsigned int status, const char *p1, ...)
b = va_arg(args, unsigned int);
if (!b)
return;
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"%s: \"%s\" option may only be specified once",
p1, p2);
break;
@@ -801,13 +854,13 @@ void xtables_param_act(unsigned int status, const char *p1, ...)
b = va_arg(args, unsigned int);
if (!b)
return;
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"%s: \"%s\" option cannot be inverted", p1, p2);
break;
case XTF_BAD_VALUE:
p2 = va_arg(args, const char *);
p3 = va_arg(args, const char *);
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"%s: Bad value for \"%s\" option: \"%s\"",
p1, p2, p3);
break;
@@ -815,11 +868,11 @@ void xtables_param_act(unsigned int status, const char *p1, ...)
b = va_arg(args, unsigned int);
if (!b)
return;
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"%s: At most one action is possible", p1);
break;
default:
- exit_error(status, p1, args);
+ xt_params->exit_err(status, p1, args);
break;
}
@@ -1002,7 +1055,7 @@ ipparse_hostnetwork(const char *name, unsigned int *naddrs)
if ((addrptmp = host_to_ipaddr(name, naddrs)) != NULL)
return addrptmp;
- exit_error(PARAMETER_PROBLEM, "host/network `%s' not found", name);
+ xt_params->exit_err(PARAMETER_PROBLEM, "host/network `%s' not found", name);
}
static struct in_addr *parse_ipmask(const char *mask)
@@ -1020,7 +1073,7 @@ static struct in_addr *parse_ipmask(const char *mask)
/* dotted_to_addr already returns a network byte order addr */
return addrp;
if (!xtables_strtoui(mask, NULL, &bits, 0, 32))
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"invalid mask `%s' specified", mask);
if (bits != 0) {
maskaddr.s_addr = htonl(0xFFFFFFFF << (32 - bits));
@@ -1231,7 +1284,7 @@ ip6parse_hostnetwork(const char *name, unsigned int *naddrs)
if ((addrp = host_to_ip6addr(name, naddrs)) != NULL)
return addrp;
- exit_error(PARAMETER_PROBLEM, "host/network `%s' not found", name);
+ xt_params->exit_err(PARAMETER_PROBLEM, "host/network `%s' not found", name);
}
static struct in6_addr *parse_ip6mask(char *mask)
@@ -1248,7 +1301,7 @@ static struct in6_addr *parse_ip6mask(char *mask)
if ((addrp = xtables_numeric_to_ip6addr(mask)) != NULL)
return addrp;
if (!xtables_strtoui(mask, NULL, &bits, 0, 128))
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"invalid mask `%s' specified", mask);
if (bits != 0) {
char *p = (void *)&maskaddr;
@@ -1348,13 +1401,13 @@ int xtables_check_inverse(const char option[], int *invert,
"extrapositioned (`! --option this`).\n");
if (*invert)
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"Multiple `!' flags not allowed");
*invert = true;
if (my_optind != NULL) {
++*my_optind;
if (argc && *my_optind > argc)
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"no argument following `!'");
}
@@ -1405,7 +1458,7 @@ xtables_parse_protocol(const char *s)
}
}
if (i == ARRAY_SIZE(xtables_chain_protos))
- exit_error(PARAMETER_PROBLEM,
+ xt_params->exit_err(PARAMETER_PROBLEM,
"unknown protocol `%s' specified",
s);
}