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[201811] Update DHCPv6 counter on relayed messages (#9281)

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kellyyeh 2021-11-19 11:03:55 -08:00 committed by GitHub
parent 3885b6f452
commit 9e75e856eb
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 37 additions and 20 deletions
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50
src/dhcp6relay/src/relay.cpp
View File

@ -19,7 +19,7 @@ struct event *ev_sigint;
struct event *ev_sigterm;
static std::string counter_table = "DHCPv6_COUNTER_TABLE|";
swss::DBConnector state_db(6, "localhost", 6379, 0);
swss::RedisClient m_applDbRedisClient(&state_db);
swss::RedisClient m_stateDbRedisClient(&state_db);
/* DHCPv6 filter */
/* sudo tcpdump -dd "ip6 dst ff02::1:2 && udp dst port 547" */
@ -50,7 +50,8 @@ const struct sock_fprog ether_relay_fprog = {
/* DHCPv6 Counter */
uint64_t counters[DHCPv6_MESSAGE_TYPE_COUNT];
std::map<int, std::string> counterMap = {{1, "Solicit"},
std::map<int, std::string> counterMap = {{0, "Unknown"},
{1, "Solicit"},
{2, "Advertise"},
{3, "Request"},
{4, "Confirm"},
@ -72,17 +73,18 @@ std::map<int, std::string> counterMap = {{1, "Solicit"},
* @return none
*/
void initialize_counter(std::string counterVlan) {
m_applDbRedisClient.hset(counterVlan, "Solicit", toString(counters[DHCPv6_MESSAGE_TYPE_SOLICIT]));
m_applDbRedisClient.hset(counterVlan, "Advertise", toString(counters[DHCPv6_MESSAGE_TYPE_ADVERTISE]));
m_applDbRedisClient.hset(counterVlan, "Request", toString(counters[DHCPv6_MESSAGE_TYPE_REQUEST]));
m_applDbRedisClient.hset(counterVlan, "Confirm", toString(counters[DHCPv6_MESSAGE_TYPE_CONFIRM]));
m_applDbRedisClient.hset(counterVlan, "Renew", toString(counters[DHCPv6_MESSAGE_TYPE_RENEW]));
m_applDbRedisClient.hset(counterVlan, "Rebind", toString(counters[DHCPv6_MESSAGE_TYPE_REBIND]));
m_applDbRedisClient.hset(counterVlan, "Reply", toString(counters[DHCPv6_MESSAGE_TYPE_REPLY]));
m_applDbRedisClient.hset(counterVlan, "Release", toString(counters[DHCPv6_MESSAGE_TYPE_RELEASE]));
m_applDbRedisClient.hset(counterVlan, "Decline", toString(counters[DHCPv6_MESSAGE_TYPE_DECLINE]));
m_applDbRedisClient.hset(counterVlan, "Relay-Forward", toString(counters[DHCPv6_MESSAGE_TYPE_RELAY_FORW]));
m_applDbRedisClient.hset(counterVlan, "Relay-Reply", toString(counters[DHCPv6_MESSAGE_TYPE_RELAY_REPL]));
m_stateDbRedisClient.hset(counterVlan, "Unknown", toString(counters[DHCPv6_MESSAGE_TYPE_UNKNOWN]));
m_stateDbRedisClient.hset(counterVlan, "Solicit", toString(counters[DHCPv6_MESSAGE_TYPE_SOLICIT]));
m_stateDbRedisClient.hset(counterVlan, "Advertise", toString(counters[DHCPv6_MESSAGE_TYPE_ADVERTISE]));
m_stateDbRedisClient.hset(counterVlan, "Request", toString(counters[DHCPv6_MESSAGE_TYPE_REQUEST]));
m_stateDbRedisClient.hset(counterVlan, "Confirm", toString(counters[DHCPv6_MESSAGE_TYPE_CONFIRM]));
m_stateDbRedisClient.hset(counterVlan, "Renew", toString(counters[DHCPv6_MESSAGE_TYPE_RENEW]));
m_stateDbRedisClient.hset(counterVlan, "Rebind", toString(counters[DHCPv6_MESSAGE_TYPE_REBIND]));
m_stateDbRedisClient.hset(counterVlan, "Reply", toString(counters[DHCPv6_MESSAGE_TYPE_REPLY]));
m_stateDbRedisClient.hset(counterVlan, "Release", toString(counters[DHCPv6_MESSAGE_TYPE_RELEASE]));
m_stateDbRedisClient.hset(counterVlan, "Decline", toString(counters[DHCPv6_MESSAGE_TYPE_DECLINE]));
m_stateDbRedisClient.hset(counterVlan, "Relay-Forward", toString(counters[DHCPv6_MESSAGE_TYPE_RELAY_FORW]));
m_stateDbRedisClient.hset(counterVlan, "Relay-Reply", toString(counters[DHCPv6_MESSAGE_TYPE_RELAY_REPL]));
}
/**
@ -96,7 +98,7 @@ void initialize_counter(std::string counterVlan) {
* @return none
*/
void update_counter(std::string counterVlan, uint8_t msg_type) {
m_applDbRedisClient.hset(counterVlan, counterMap.find(msg_type)->second, toString(counters[msg_type]));
m_stateDbRedisClient.hset(counterVlan, counterMap.find(msg_type)->second, toString(counters[msg_type]));
}
/**
@ -207,19 +209,26 @@ const struct dhcpv6_option *parse_dhcpv6_opt(const uint8_t *buffer, const uint8_
}
/**
* @code void send_udp(int sock, uint8_t *buffer, struct sockaddr_in6 target, uint32_t n);
* @code void send_udp(int sock, uint8_t *buffer, struct sockaddr_in6 target, uint32_t n, relay_config *config, uint8_t msg_type);
*
* @brief send udp packet
*
* @param *buffer message buffer
* @param sockaddr_in6 target target socket
* @param n length of message
* @param relay_config *config pointer to relay_config
* @param uint8_t msg_type message type of dhcpv6 option of relayed message
*
* @return dhcpv6_option end of dhcpv6 message option
*/
void send_udp(int sock, uint8_t *buffer, struct sockaddr_in6 target, uint32_t n) {
void send_udp(int sock, uint8_t *buffer, struct sockaddr_in6 target, uint32_t n, relay_config *config, uint8_t msg_type) {
std::string counterVlan = counter_table;
if(sendto(sock, buffer, n, 0, (const struct sockaddr *)&target, sizeof(target)) == -1)
syslog(LOG_ERR, "sendto: Failed to send to target address\n");
else {
counters[msg_type]++;
update_counter(counterVlan.append(config->interface), msg_type);
}
}
/**
@ -452,7 +461,7 @@ void relay_client(int sock, const uint8_t *msg, int32_t len, const ip6_hdr *ip_h
current_buffer_position += dhcp_message_length + sizeof(dhcpv6_option);
for(auto server: config->servers_sock) {
send_udp(sock, buffer, server, current_buffer_position - buffer);
send_udp(sock, buffer, server, current_buffer_position - buffer, config, new_message.msg_type);
}
}
@ -470,6 +479,7 @@ void relay_client(int sock, const uint8_t *msg, int32_t len, const ip6_hdr *ip_h
*/
void relay_relay_reply(int sock, const uint8_t *msg, int32_t len, relay_config *configs) {
static uint8_t buffer[4096];
uint8_t type = 0;
char ifname[configs->interface.size()];
struct sockaddr_in6 target_addr;
auto current_buffer_position = buffer;
@ -477,6 +487,9 @@ void relay_client(int sock, const uint8_t *msg, int32_t len, const ip6_hdr *ip_h
const uint8_t *tmp = NULL;
auto dhcp_relay_header = parse_dhcpv6_relay(msg);
current_position += sizeof(struct dhcpv6_relay_msg);
auto position = current_position + sizeof(struct dhcpv6_option);
auto dhcpv6msg = parse_dhcpv6_hdr(position);
while ((current_position - msg) != len) {
auto option = parse_dhcpv6_opt(current_position, &tmp);
@ -485,6 +498,7 @@ void relay_client(int sock, const uint8_t *msg, int32_t len, const ip6_hdr *ip_h
case OPTION_RELAY_MSG:
memcpy(current_buffer_position, ((uint8_t *)option) + sizeof(struct dhcpv6_option), ntohs(option->option_length));
current_buffer_position += ntohs(option->option_length);
type = dhcpv6msg->msg_type;;
break;
default:
break;
@ -498,7 +512,7 @@ void relay_client(int sock, const uint8_t *msg, int32_t len, const ip6_hdr *ip_h
target_addr.sin6_port = htons(CLIENT_PORT);
target_addr.sin6_scope_id = if_nametoindex(ifname);
send_udp(sock, buffer, target_addr, current_buffer_position - buffer);
send_udp(sock, buffer, target_addr, current_buffer_position - buffer, configs, type);
}

7
src/dhcp6relay/src/relay.h
View File

@ -25,6 +25,7 @@
/* DHCPv6 message types */
typedef enum
{
DHCPv6_MESSAGE_TYPE_UNKNOWN = 0,
DHCPv6_MESSAGE_TYPE_SOLICIT = 1,
DHCPv6_MESSAGE_TYPE_ADVERTISE = 2,
DHCPv6_MESSAGE_TYPE_REQUEST = 3,
@ -317,15 +318,17 @@ const struct dhcpv6_relay_msg *parse_dhcpv6_relay(const uint8_t *buffer);
const struct dhcpv6_option *parse_dhcpv6_opt(const uint8_t *buffer, const uint8_t **out_end);
/**
* @code void send_udp(int sock, uint8_t *buffer, struct sockaddr_in6 target, uint32_t n);
* @code void send_udp(int sock, uint8_t *buffer, struct sockaddr_in6 target, uint32_t n, relay_config *config, uint8_t msg_type);
*
* @brief send udp packet
*
* @param *buffer message buffer
* @param sockaddr_in6 target target socket
* @param n length of message
* @param relay_config *config pointer to relay_config
* @param uint8_t msg_type message type of dhcpv6 option of relayed message
*
* @return dhcpv6_option end of dhcpv6 message option
*/
void send_udp(int sock, struct sockaddr_in6 target, uint8_t *buffer, uint32_t n);
void send_udp(int sock, uint8_t *buffer, struct sockaddr_in6 target, uint32_t n, relay_config *config, uint8_t msg_type);