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Made accepted SNMP version runtime configurable.

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This feature can be disabled by setting LWIP_SNMP_CONFIGURE_VERSIONS to 0.
This commit is contained in:
Marco 2017-03-01 15:39:44 +01:00 committed by Dirk Ziegelmeier
parent 8fd09d4608
commit 78806001e5
3 changed files with 110 additions and 7 deletions
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96
src/apps/snmp/snmp_msg.c
View File

@ -66,6 +66,94 @@ const char *snmp_community_trap = SNMP_COMMUNITY_TRAP;
snmp_write_callback_fct snmp_write_callback = NULL;
void* snmp_write_callback_arg = NULL;
#if LWIP_SNMP_CONFIGURE_VERSIONS
static u8_t v1_enabled = 1;
static u8_t v2c_enabled = 1;
static u8_t v3_enabled = 1;
static u8_t
snmp_version_enabled(u8_t version)
{
LWIP_ASSERT("Invalid SNMP version", (version == SNMP_VERSION_1) || (version == SNMP_VERSION_2c)
#if LWIP_SNMP_V3
|| (version == SNMP_VERSION_3)
#endif
);
if (version == SNMP_VERSION_1) {
return v1_enabled;
}
else if (version == SNMP_VERSION_2c) {
return v2c_enabled;
}
#if LWIP_SNMP_V3
else { /* version == SNMP_VERSION_3 */
return v3_enabled;
}
#endif
}
u8_t
snmp_v1_enabled(void)
{
return snmp_version_enabled(SNMP_VERSION_1);
}
u8_t
snmp_v2c_enabled(void)
{
return snmp_version_enabled(SNMP_VERSION_2c);
}
u8_t
snmp_v3_enabled(void)
{
return snmp_version_enabled(SNMP_VERSION_3);
}
static void
snmp_version_enable(u8_t version, u8_t enable)
{
LWIP_ASSERT("Invalid SNMP version", (version == SNMP_VERSION_1) || (version == SNMP_VERSION_2c)
#if LWIP_SNMP_V3
|| (version == SNMP_VERSION_3)
#endif
);
if (version == SNMP_VERSION_1) {
v1_enabled = enable;
}
else if (version == SNMP_VERSION_2c) {
v2c_enabled = enable;
}
#if LWIP_SNMP_V3
else { /* version == SNMP_VERSION_3 */
v3_enabled = enable;
}
#endif
}
void
snmp_v1_enable(u8_t enable)
{
snmp_version_enable(SNMP_VERSION_1, enable);
}
void
snmp_v2c_enable(u8_t enable)
{
snmp_version_enable(SNMP_VERSION_2c, enable);
}
void
snmp_v3_enable(u8_t enable)
{
snmp_version_enable(SNMP_VERSION_3, enable);
}
#endif
/**
* @ingroup snmp_core
* Returns current SNMP community string.
@ -630,10 +718,14 @@ snmp_parse_inbound_frame(struct snmp_request *request)
IF_PARSE_ASSERT(parent_tlv_value_len > 0);
IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &s32_value));
if ((s32_value != SNMP_VERSION_1) &&
if (((s32_value != SNMP_VERSION_1) &&
(s32_value != SNMP_VERSION_2c)
#if LWIP_SNMP_V3
&& (s32_value != SNMP_VERSION_3)
&& (s32_value != SNMP_VERSION_3))
#endif
#if LWIP_SNMP_CONFIGURE_VERSIONS
|| (!snmp_version_enabled(s32_value))
#endif
)
{

7
src/include/lwip/apps/snmp.h
View File

@ -106,6 +106,13 @@ err_t snmp_send_trap(const struct snmp_obj_id* oid, s32_t generic_trap, s32_t sp
void snmp_set_auth_traps_enabled(u8_t enable);
u8_t snmp_get_auth_traps_enabled(void);
u8_t snmp_v1_enabled(void);
u8_t snmp_v2c_enabled(void);
u8_t snmp_v3_enabled(void);
void snmp_v1_enable(u8_t enable);
void snmp_v2c_enable(u8_t enable);
void snmp_v3_enable(u8_t enable);
const char * snmp_get_community(void);
const char * snmp_get_community_write(void);
const char * snmp_get_community_trap(void);

14
src/include/lwip/apps/snmp_opts.h
View File

@ -279,15 +279,19 @@
* THIS IS UNDER DEVELOPMENT AND SHOULD NOT BE ENABLED IN PRODUCTS.
*/
#ifndef LWIP_SNMP_V3
#define LWIP_SNMP_V3 0
#endif
#ifndef LWIP_SNMP_V3_CRYPTO
#define LWIP_SNMP_V3_CRYPTO LWIP_SNMP_V3
#define LWIP_SNMP_V3 1
#endif
#ifndef LWIP_SNMP_V3_MBEDTLS
#define LWIP_SNMP_V3_MBEDTLS LWIP_SNMP_V3
#endif
#ifndef LWIP_SNMP_V3_CRYPTO
#define LWIP_SNMP_V3_CRYPTO LWIP_SNMP_V3_MBEDTLS
#endif
#ifndef LWIP_SNMP_CONFIGURE_VERSIONS
#define LWIP_SNMP_CONFIGURE_VERSIONS 0
#endif
#endif /* LWIP_HDR_SNMP_OPTS_H */