From 396a92cb2e3e5c1e87b361484a9f3a8ec7ac1c5a Mon Sep 17 00:00:00 2001 From: kellyyeh <42761586+kellyyeh@users.noreply.github.com> Date: Tue, 12 Apr 2022 10:44:17 -0700 Subject: [PATCH] [dhcp_relay] Remove dhcp6mon (#10467) --- dockers/docker-dhcp-relay/Dockerfile.j2 | 2 +- ...lay.monitors.j2 => dhcp-relay.monitors.j2} | 2 - .../docker-dhcp-relay.supervisord.conf.j2 | 2 +- src/dhcpmon/src/dhcp_device.c | 593 ++++-------------- src/dhcpmon/src/dhcp_device.h | 121 +--- src/dhcpmon/src/dhcp_devman.c | 37 +- src/dhcpmon/src/dhcp_devman.h | 17 +- src/dhcpmon/src/dhcp_mon.c | 106 +--- src/dhcpmon/src/dhcp_mon.h | 4 +- src/dhcpmon/src/main.c | 20 +- .../py2/docker-dhcp-relay.supervisord.conf | 2 +- .../py3/docker-dhcp-relay.supervisord.conf | 2 +- 12 files changed, 186 insertions(+), 722 deletions(-) rename dockers/docker-dhcp-relay/{dhcpv6-relay.monitors.j2 => dhcp-relay.monitors.j2} (97%) diff --git a/dockers/docker-dhcp-relay/Dockerfile.j2 b/dockers/docker-dhcp-relay/Dockerfile.j2 index 2d2afd9224..f214edc851 100644 --- a/dockers/docker-dhcp-relay/Dockerfile.j2 +++ b/dockers/docker-dhcp-relay/Dockerfile.j2 @@ -30,7 +30,7 @@ RUN apt-get clean -y && \ COPY ["docker_init.sh", "start.sh", "/usr/bin/"] COPY ["docker-dhcp-relay.supervisord.conf.j2", "port-name-alias-map.txt.j2", "wait_for_intf.sh.j2", "/usr/share/sonic/templates/"] -COPY ["dhcp-relay.programs.j2", "dhcpv4-relay.agents.j2", "dhcpv6-relay.agents.j2", "dhcpv6-relay.monitors.j2", "/usr/share/sonic/templates/"] +COPY ["dhcp-relay.programs.j2", "dhcpv4-relay.agents.j2", "dhcpv6-relay.agents.j2", "dhcp-relay.monitors.j2", "/usr/share/sonic/templates/"] COPY ["files/supervisor-proc-exit-listener", "/usr/bin"] COPY ["critical_processes", "/etc/supervisor"] COPY ["cli", "/cli/"] diff --git a/dockers/docker-dhcp-relay/dhcpv6-relay.monitors.j2 b/dockers/docker-dhcp-relay/dhcp-relay.monitors.j2 similarity index 97% rename from dockers/docker-dhcp-relay/dhcpv6-relay.monitors.j2 rename to dockers/docker-dhcp-relay/dhcp-relay.monitors.j2 index 9f2d0f01b5..ae11105ae3 100644 --- a/dockers/docker-dhcp-relay/dhcpv6-relay.monitors.j2 +++ b/dockers/docker-dhcp-relay/dhcp-relay.monitors.j2 @@ -59,8 +59,6 @@ command=/usr/sbin/dhcpmon -id {{ vlan_name }} {% if prefix | ipv4 %} -im {{ name }}{% endif -%} {% endfor %} {% endif %} -{% if relay_for_ipv4.flag %} -4{% endif %} -{% if relay_for_ipv6.flag %} -6{% endif %} priority=4 autostart=false diff --git a/dockers/docker-dhcp-relay/docker-dhcp-relay.supervisord.conf.j2 b/dockers/docker-dhcp-relay/docker-dhcp-relay.supervisord.conf.j2 index 664e1f36c0..41a13dd496 100644 --- a/dockers/docker-dhcp-relay/docker-dhcp-relay.supervisord.conf.j2 +++ b/dockers/docker-dhcp-relay/docker-dhcp-relay.supervisord.conf.j2 @@ -65,6 +65,6 @@ dependent_startup_wait_for=rsyslogd:running {% include 'dhcpv6-relay.agents.j2' %} {% endfor %} -{% include 'dhcpv6-relay.monitors.j2' %} +{% include 'dhcp-relay.monitors.j2' %} {% endif %} {% endif %} diff --git a/src/dhcpmon/src/dhcp_device.c b/src/dhcpmon/src/dhcp_device.c index e4fbc7f569..f45483f850 100644 --- a/src/dhcpmon/src/dhcp_device.c +++ b/src/dhcpmon/src/dhcp_device.c @@ -21,51 +21,25 @@ #include #include #include -#include -#include -#include #include "dhcp_device.h" -/** DHCP versions flags */ -static bool dhcpv4_enabled; -static bool dhcpv6_enabled; - /** Counter print width */ #define DHCP_COUNTER_WIDTH 9 /** Start of Ether header of a captured frame */ #define ETHER_START_OFFSET 0 -/** EtherType field offset from Ether header of a captured frame */ -#define ETHER_TYPE_OFFSET (ETHER_START_OFFSET + 12) /** Start of IP header of a captured frame */ #define IP_START_OFFSET (ETHER_START_OFFSET + ETHER_HDR_LEN) -/** Start of UDP header on IPv4 packet of a captured frame */ -#define UDPv4_START_OFFSET (IP_START_OFFSET + sizeof(struct ip)) -/** Start of DHCPv4 header of a captured frame */ -#define DHCPv4_START_OFFSET (UDPv4_START_OFFSET + sizeof(struct udphdr)) -/** Start of DHCPv4 Options segment of a captured frame */ -#define DHCPv4_OPTIONS_HEADER_SIZE 240 +/** Start of UDP header of a captured frame */ +#define UDP_START_OFFSET (IP_START_OFFSET + sizeof(struct ip)) +/** Start of DHCP header of a captured frame */ +#define DHCP_START_OFFSET (UDP_START_OFFSET + sizeof(struct udphdr)) +/** Start of DHCP Options segment of a captured frame */ +#define DHCP_OPTIONS_HEADER_SIZE 240 /** Offset of DHCP GIADDR */ #define DHCP_GIADDR_OFFSET 24 -/** IPv6 link-local prefix */ -#define IPV6_LINK_LOCAL_PREFIX 0x80fe -/** Start of UDP header on IPv6 packet of a captured frame */ -#define UDPv6_START_OFFSET (IP_START_OFFSET + sizeof(struct ip6_hdr)) -/** Start of DHCPv6 header of a captured frame */ -#define DHCPv6_START_OFFSET (UDPv6_START_OFFSET + sizeof(struct udphdr)) -/** Size of 'type' field on DHCPv6 header */ -#define DHCPv6_TYPE_LENGTH 1 -/** Size of DHCPv6 relay message header to first option */ -#define DHCPv6_RELAY_MSG_OPTIONS_OFFSET 34 -/** Size of 'option' field on DHCPv6 header */ -#define DHCPv6_OPTION_LENGTH 2 -/** Size of 'option length' field on DHCPv6 header */ -#define DHCPv6_OPTION_LEN_LENGTH 2 -/** DHCPv6 OPTION_RELAY_MSG */ -#define DHCPv6_OPTION_RELAY_MSG 9 - #define OP_LDHA (BPF_LD | BPF_H | BPF_ABS) /** bpf ldh Abs */ #define OP_LDHI (BPF_LD | BPF_H | BPF_IND) /** bpf ldh Ind */ #define OP_LDB (BPF_LD | BPF_B | BPF_ABS) /** bpf ldb Abs*/ @@ -75,40 +49,34 @@ static bool dhcpv6_enabled; #define OP_JSET (BPF_JMP | BPF_JSET | BPF_K) /** bpf jset */ #define OP_LDXB (BPF_LDX | BPF_B | BPF_MSH) /** bpf ldxb */ -/** Berkeley Packet Filter program for "udp and (port 546 or port 547 or port 67 or port 68)". +/** Berkeley Packet Filter program for "udp and (port 67 or port 68)". * This program is obtained using the following command tcpdump: - * `tcpdump -dd "udp and (port 546 or port 547 or port 67 or port 68)"` + * `tcpdump -dd "udp and (port 67 or port 68)"` */ static struct sock_filter dhcp_bpf_code[] = { - {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x0000000c}, // (000) ldh [12] - {.code = OP_JEQ, .jt = 0, .jf = 9, .k = 0x000086dd}, // (001) jeq #0x86dd jt 2 jf 11 - {.code = OP_LDB, .jt = 0, .jf = 0, .k = 0x00000014}, // (002) ldb [20] - {.code = OP_JEQ, .jt = 0, .jf = 24, .k = 0x00000011}, // (003) jeq #0x11 jt 4 jf 28 - {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x00000036}, // (004) ldh [54] - {.code = OP_JEQ, .jt = 21, .jf = 0, .k = 0x00000222}, // (005) jeq #0x222 jt 27 jf 6 - {.code = OP_JEQ, .jt = 20, .jf = 0, .k = 0x00000223}, // (006) jeq #0x223 jt 27 jf 7 - {.code = OP_JEQ, .jt = 19, .jf = 0, .k = 0x00000043}, // (007) jeq #0x43 jt 27 jf 8 - {.code = OP_JEQ, .jt = 18, .jf = 0, .k = 0x00000044}, // (008) jeq #0x44 jt 27 jf 9 - {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x00000038}, // (009) ldh [56] - {.code = OP_JEQ, .jt = 16, .jf = 13, .k = 0x00000222}, // (010) jeq #0x222 jt 27 jf 24 - {.code = OP_JEQ, .jt = 0, .jf = 16, .k = 0x00000800}, // (011) jeq #0x800 jt 12 jf 28 - {.code = OP_LDB, .jt = 0, .jf = 0, .k = 0x00000017}, // (012) ldb [23] - {.code = OP_JEQ, .jt = 0, .jf = 14, .k = 0x00000011}, // (013) jeq #0x11 jt 14 jf 28 - {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x00000014}, // (014) ldh [20] - {.code = OP_JSET, .jt = 12, .jf = 0, .k = 0x00001fff}, // (015) jset #0x1fff jt 28 jf 16 - {.code = OP_LDXB, .jt = 0, .jf = 0, .k = 0x0000000e}, // (016) ldxb 4*([14]&0xf) - {.code = OP_LDHI, .jt = 0, .jf = 0, .k = 0x0000000e}, // (017) ldh [x + 14] - {.code = OP_JEQ, .jt = 8, .jf = 0, .k = 0x00000222}, // (018) jeq #0x222 jt 27 jf 19 - {.code = OP_JEQ, .jt = 7, .jf = 0, .k = 0x00000223}, // (019) jeq #0x223 jt 27 jf 20 - {.code = OP_JEQ, .jt = 6, .jf = 0, .k = 0x00000043}, // (020) jeq #0x43 jt 27 jf 21 - {.code = OP_JEQ, .jt = 5, .jf = 0, .k = 0x00000044}, // (021) jeq #0x44 jt 27 jf 22 - {.code = OP_LDHI, .jt = 0, .jf = 0, .k = 0x00000010}, // (022) ldh [x + 16] - {.code = OP_JEQ, .jt = 3, .jf = 0, .k = 0x00000222}, // (023) jeq #0x222 jt 27 jf 24 - {.code = OP_JEQ, .jt = 2, .jf = 0, .k = 0x00000223}, // (024) jeq #0x223 jt 27 jf 25 - {.code = OP_JEQ, .jt = 1, .jf = 0, .k = 0x00000043}, // (025) jeq #0x43 jt 27 jf 26 - {.code = OP_JEQ, .jt = 0, .jf = 1, .k = 0x00000044}, // (026) jeq #0x44 jt 27 jf 28 - {.code = OP_RET, .jt = 0, .jf = 0, .k = 0x00040000}, // (027) ret #262144 - {.code = OP_RET, .jt = 0, .jf = 0, .k = 0x00000000}, // (028) ret + {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x0000000c}, // (000) ldh [12] + {.code = OP_JEQ, .jt = 0, .jf = 7, .k = 0x000086dd}, // (001) jeq #0x86dd jt 2 jf 9 + {.code = OP_LDB, .jt = 0, .jf = 0, .k = 0x00000014}, // (002) ldb [20] + {.code = OP_JEQ, .jt = 0, .jf = 18, .k = 0x00000011}, // (003) jeq #0x11 jt 4 jf 22 + {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x00000036}, // (004) ldh [54] + {.code = OP_JEQ, .jt = 15, .jf = 0, .k = 0x00000043}, // (005) jeq #0x43 jt 21 jf 6 + {.code = OP_JEQ, .jt = 14, .jf = 0, .k = 0x00000044}, // (006) jeq #0x44 jt 21 jf 7 + {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x00000038}, // (007) ldh [56] + {.code = OP_JEQ, .jt = 12, .jf = 11, .k = 0x00000043}, // (008) jeq #0x43 jt 21 jf 20 + {.code = OP_JEQ, .jt = 0, .jf = 12, .k = 0x00000800}, // (009) jeq #0x800 jt 10 jf 22 + {.code = OP_LDB, .jt = 0, .jf = 0, .k = 0x00000017}, // (010) ldb [23] + {.code = OP_JEQ, .jt = 0, .jf = 10, .k = 0x00000011}, // (011) jeq #0x11 jt 12 jf 22 + {.code = OP_LDHA, .jt = 0, .jf = 0, .k = 0x00000014}, // (012) ldh [20] + {.code = OP_JSET, .jt = 8, .jf = 0, .k = 0x00001fff}, // (013) jset #0x1fff jt 22 jf 14 + {.code = OP_LDXB, .jt = 0, .jf = 0, .k = 0x0000000e}, // (014) ldxb 4*([14]&0xf) + {.code = OP_LDHI, .jt = 0, .jf = 0, .k = 0x0000000e}, // (015) ldh [x + 14] + {.code = OP_JEQ, .jt = 4, .jf = 0, .k = 0x00000043}, // (016) jeq #0x43 jt 21 jf 17 + {.code = OP_JEQ, .jt = 3, .jf = 0, .k = 0x00000044}, // (017) jeq #0x44 jt 21 jf 18 + {.code = OP_LDHI, .jt = 0, .jf = 0, .k = 0x00000010}, // (018) ldh [x + 16] + {.code = OP_JEQ, .jt = 1, .jf = 0, .k = 0x00000043}, // (019) jeq #0x43 jt 21 jf 20 + {.code = OP_JEQ, .jt = 0, .jf = 1, .k = 0x00000044}, // (020) jeq #0x44 jt 21 jf 22 + {.code = OP_RET, .jt = 0, .jf = 0, .k = 0x00040000}, // (021) ret #262144 + {.code = OP_RET, .jt = 0, .jf = 0, .k = 0x00000000}, // (022) ret #0 }; /** Filter program socket struct */ @@ -121,29 +89,16 @@ static struct sock_fprog dhcp_sock_bfp = { */ static dhcp_device_context_t aggregate_dev = {0}; -static dhcp_device_context_t *mgmt_intf = NULL; - -/** Monitored DHCPv4 message type */ -static dhcpv4_message_type_t v4_monitored_msgs[] = { - DHCPv4_MESSAGE_TYPE_DISCOVER, - DHCPv4_MESSAGE_TYPE_OFFER, - DHCPv4_MESSAGE_TYPE_REQUEST, - DHCPv4_MESSAGE_TYPE_ACK +/** Monitored DHCP message type */ +static dhcp_message_type_t monitored_msgs[] = { + DHCP_MESSAGE_TYPE_DISCOVER, + DHCP_MESSAGE_TYPE_OFFER, + DHCP_MESSAGE_TYPE_REQUEST, + DHCP_MESSAGE_TYPE_ACK }; -/** Monitored DHCPv6 message type */ -static dhcpv6_message_type_t v6_monitored_msgs[] = { - DHCPv6_MESSAGE_TYPE_SOLICIT, - DHCPv6_MESSAGE_TYPE_ADVERTISE, - DHCPv6_MESSAGE_TYPE_REQUEST, - DHCPv6_MESSAGE_TYPE_REPLY -}; - -/** Number of monitored DHCPv4 message type */ -static uint8_t v4_monitored_msg_sz = sizeof(v4_monitored_msgs) / sizeof(*v4_monitored_msgs); - -/** Number of monitored DHCPv6 message type */ -static uint8_t v6_monitored_msg_sz = sizeof(v6_monitored_msgs) / sizeof(*v6_monitored_msgs); +/** Number of monitored DHCP message type */ +static uint8_t monitored_msg_sz = sizeof(monitored_msgs) / sizeof(*monitored_msgs); /** * @code handle_dhcp_option_53(context, dhcp_option, dir, iphdr, dhcphdr); @@ -168,37 +123,27 @@ static void handle_dhcp_option_53(dhcp_device_context_t *context, switch (dhcp_option[2]) { // DHCP messages send by client - case DHCPv4_MESSAGE_TYPE_DISCOVER: - case DHCPv4_MESSAGE_TYPE_REQUEST: - case DHCPv4_MESSAGE_TYPE_DECLINE: - case DHCPv4_MESSAGE_TYPE_RELEASE: - case DHCPv4_MESSAGE_TYPE_INFORM: + case DHCP_MESSAGE_TYPE_DISCOVER: + case DHCP_MESSAGE_TYPE_REQUEST: + case DHCP_MESSAGE_TYPE_DECLINE: + case DHCP_MESSAGE_TYPE_RELEASE: + case DHCP_MESSAGE_TYPE_INFORM: giaddr = ntohl(dhcphdr[DHCP_GIADDR_OFFSET] << 24 | dhcphdr[DHCP_GIADDR_OFFSET + 1] << 16 | dhcphdr[DHCP_GIADDR_OFFSET + 2] << 8 | dhcphdr[DHCP_GIADDR_OFFSET + 3]); if ((context->giaddr_ip == giaddr && context->is_uplink && dir == DHCP_TX) || (!context->is_uplink && dir == DHCP_RX && iphdr->ip_dst.s_addr == INADDR_BROADCAST)) { - context->counters.v4counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; - // If the packet recieved on the mgmt interface, we don't want to increment the aggregate device - if (context == mgmt_intf) - { - break; - } - aggregate_dev.counters.v4counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; + context->counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; + aggregate_dev.counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; } break; // DHCP messages send by server - case DHCPv4_MESSAGE_TYPE_OFFER: - case DHCPv4_MESSAGE_TYPE_ACK: - case DHCPv4_MESSAGE_TYPE_NAK: + case DHCP_MESSAGE_TYPE_OFFER: + case DHCP_MESSAGE_TYPE_ACK: + case DHCP_MESSAGE_TYPE_NAK: if ((context->giaddr_ip == iphdr->ip_dst.s_addr && context->is_uplink && dir == DHCP_RX) || (!context->is_uplink && dir == DHCP_TX)) { - context->counters.v4counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; - // If the packet recieved on the mgmt interface, we don't want to increment the aggregate device - if (context == mgmt_intf) - { - break; - } - aggregate_dev.counters.v4counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; + context->counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; + aggregate_dev.counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option[2]]++; } break; default: @@ -207,48 +152,6 @@ static void handle_dhcp_option_53(dhcp_device_context_t *context, } } -/** - * @code handle_dhcpv6_option(context, dhcp_option, dir); - * - * @brief handle the logic related to DHCPv6 option - * - * @param context Device (interface) context - * @param dhcp_option pointer to DHCP option buffer space - * @param dir packet direction - * - * @return none - */ -static void handle_dhcpv6_option(dhcp_device_context_t *context, - const u_char dhcp_option, - dhcp_packet_direction_t dir) -{ - switch (dhcp_option) - { - case DHCPv6_MESSAGE_TYPE_SOLICIT: - case DHCPv6_MESSAGE_TYPE_REQUEST: - case DHCPv6_MESSAGE_TYPE_CONFIRM: - case DHCPv6_MESSAGE_TYPE_RENEW: - case DHCPv6_MESSAGE_TYPE_REBIND: - case DHCPv6_MESSAGE_TYPE_RELEASE: - case DHCPv6_MESSAGE_TYPE_DECLINE: - case DHCPv6_MESSAGE_TYPE_ADVERTISE: - case DHCPv6_MESSAGE_TYPE_REPLY: - case DHCPv6_MESSAGE_TYPE_RECONFIGURE: - case DHCPv6_MESSAGE_TYPE_INFORMATION_REQUEST: - context->counters.v6counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option]++; - // If the packet recieved on the mgmt interface, we don't want to increment the aggregate device - if (context == mgmt_intf) - { - break; - } - aggregate_dev.counters.v6counters[DHCP_COUNTERS_CURRENT][dir][dhcp_option]++; - break; - default: - syslog(LOG_WARNING, "handle_dhcpv6_option(%s): Unknown DHCPv6 option type %d", context->intf, dhcp_option); - break; - } -} - /** * @code read_callback(fd, event, arg); * @@ -268,29 +171,16 @@ static void read_callback(int fd, short event, void *arg) while ((event == EV_READ) && ((buffer_sz = recv(fd, context->buffer, context->snaplen, MSG_DONTWAIT)) > 0)) { struct ether_header *ethhdr = (struct ether_header*) context->buffer; - struct ip *iphdr; - struct ip6_hdr *ipv6hdr; - struct udphdr *udp; - uint8_t *dhcphdr; - int dhcp_option_offset; + struct ip *iphdr = (struct ip*) (context->buffer + IP_START_OFFSET); + struct udphdr *udp = (struct udphdr*) (context->buffer + UDP_START_OFFSET); + uint8_t *dhcphdr = context->buffer + DHCP_START_OFFSET; + int dhcp_option_offset = DHCP_START_OFFSET + DHCP_OPTIONS_HEADER_SIZE; - bool is_ipv4 = (ntohs(ethhdr->ether_type) == ETHERTYPE_IP); - if (is_ipv4) { - iphdr = (struct ip*) (context->buffer + IP_START_OFFSET); - udp = (struct udphdr*) (context->buffer + UDPv4_START_OFFSET); - dhcphdr = context->buffer + DHCPv4_START_OFFSET; - dhcp_option_offset = DHCPv4_START_OFFSET + DHCPv4_OPTIONS_HEADER_SIZE; - } else { - ipv6hdr = (struct ip6_hdr*) (context->buffer + IP_START_OFFSET); - udp = (struct udphdr*) (context->buffer + UDPv6_START_OFFSET); - dhcphdr = context->buffer + DHCPv6_START_OFFSET; - dhcp_option_offset = DHCPv6_START_OFFSET; - } - if (is_ipv4 && dhcpv4_enabled && (buffer_sz > UDPv4_START_OFFSET + sizeof(struct udphdr) + DHCPv4_OPTIONS_HEADER_SIZE) && - (ntohs(udp->len) > DHCPv4_OPTIONS_HEADER_SIZE)) { - int dhcp_sz = ntohs(udp->len) < buffer_sz - UDPv4_START_OFFSET - sizeof(struct udphdr) ? - ntohs(udp->len) : buffer_sz - UDPv4_START_OFFSET - sizeof(struct udphdr); - int dhcp_option_sz = dhcp_sz - DHCPv4_OPTIONS_HEADER_SIZE; + if ((buffer_sz > UDP_START_OFFSET + sizeof(struct udphdr) + DHCP_OPTIONS_HEADER_SIZE) && + (ntohs(udp->len) > DHCP_OPTIONS_HEADER_SIZE)) { + int dhcp_sz = ntohs(udp->len) < buffer_sz - UDP_START_OFFSET - sizeof(struct udphdr) ? + ntohs(udp->len) : buffer_sz - UDP_START_OFFSET - sizeof(struct udphdr); + int dhcp_option_sz = dhcp_sz - DHCP_OPTIONS_HEADER_SIZE; const u_char *dhcp_option = context->buffer + dhcp_option_offset; dhcp_packet_direction_t dir = (ethhdr->ether_shost[0] == context->mac[0] && ethhdr->ether_shost[1] == context->mac[1] && @@ -324,37 +214,6 @@ static void read_callback(int fd, short event, void *arg) offset += dhcp_option[offset + 1] + 2; } } - } - else if (!is_ipv4 && dhcpv6_enabled && (buffer_sz > UDPv6_START_OFFSET + sizeof(struct udphdr) + DHCPv6_TYPE_LENGTH)) { - const u_char* dhcp_header = context->buffer + dhcp_option_offset; - dhcp_packet_direction_t dir = (ethhdr->ether_shost[0] == context->mac[0] && - ethhdr->ether_shost[1] == context->mac[1] && - ethhdr->ether_shost[2] == context->mac[2] && - ethhdr->ether_shost[3] == context->mac[3] && - ethhdr->ether_shost[4] == context->mac[4] && - ethhdr->ether_shost[5] == context->mac[5]) ? - DHCP_TX : DHCP_RX; - int offset = 0; - uint16_t option = 0; - uint16_t current_option_len = 0; - // Get to inner DHCP header from encapsulated RELAY_FORWARD or RELAY_REPLY header - while (dhcp_header[offset] == DHCPv6_MESSAGE_TYPE_RELAY_FORWARD || dhcp_header[offset] == DHCPv6_MESSAGE_TYPE_RELAY_REPLY) - { - // Get to DHCPv6_OPTION_RELAY_MSG from all options - offset += DHCPv6_RELAY_MSG_OPTIONS_OFFSET; - option = htons(*((uint16_t*)(&(dhcp_header[offset])))); - - while (option != DHCPv6_OPTION_RELAY_MSG) - { - // Add to offset the option length and get the next option ID - current_option_len = htons(*((uint16_t*)(&(dhcp_header[offset + DHCPv6_OPTION_LENGTH])))); - offset += DHCPv6_OPTION_LENGTH + DHCPv6_OPTION_LEN_LENGTH + current_option_len; - option = htons(*((uint16_t*)(&(dhcp_header[offset])))); - } - // Set the offset to DHCP-relay-message data - offset += DHCPv6_OPTION_LENGTH + DHCPv6_OPTION_LEN_LENGTH; - } - handle_dhcpv6_option(context, dhcp_header[offset], dir); } else { syslog(LOG_WARNING, "read_callback(%s): read length (%ld) is too small to capture DHCP options", context->intf, buffer_sz); @@ -363,54 +222,29 @@ static void read_callback(int fd, short event, void *arg) } /** - * @code dhcp_device_is_dhcp_inactive(v4counters, v6counters, type); + * @code dhcp_device_is_dhcp_inactive(counters); * * @brief Check if there were no DHCP activity * - * @param v4counters current/snapshot v4counter - * - * @param v6counters current/snapshot v6counter - * - * @param type DHCP type + * @param counters current/snapshot counter * * @return true if there were no DHCP activity, false otherwise */ -static bool dhcp_device_is_dhcp_inactive(uint64_t v4counters[][DHCP_DIR_COUNT][DHCPv4_MESSAGE_TYPE_COUNT], - uint64_t v6counters[][DHCP_DIR_COUNT][DHCPv6_MESSAGE_TYPE_COUNT], - dhcp_type_t type) +static bool dhcp_device_is_dhcp_inactive(uint64_t counters[][DHCP_DIR_COUNT][DHCP_MESSAGE_TYPE_COUNT]) { + uint64_t *rx_counters = counters[DHCP_COUNTERS_CURRENT][DHCP_RX]; + uint64_t *rx_counter_snapshot = counters[DHCP_COUNTERS_SNAPSHOT][DHCP_RX]; + bool rv = true; - uint64_t *rx_counters; - uint64_t *rx_counter_snapshot; - - switch (type) - { - case DHCPv4_TYPE: - rx_counters = v4counters[DHCP_COUNTERS_CURRENT][DHCP_RX]; - rx_counter_snapshot = v4counters[DHCP_COUNTERS_SNAPSHOT][DHCP_RX]; - for (uint8_t i = 0; (i < v4_monitored_msg_sz) && rv; i++) { - rv = rx_counters[v4_monitored_msgs[i]] == rx_counter_snapshot[v4_monitored_msgs[i]]; - } - break; - - case DHCPv6_TYPE: - rx_counters = v6counters[DHCP_COUNTERS_CURRENT][DHCP_RX]; - rx_counter_snapshot = v6counters[DHCP_COUNTERS_SNAPSHOT][DHCP_RX]; - for (uint8_t i = 0; (i < v6_monitored_msg_sz) && rv; i++) { - rv = rx_counters[v6_monitored_msgs[i]] == rx_counter_snapshot[v6_monitored_msgs[i]]; - } - break; - - default: - syslog(LOG_ERR, "Unknown DHCP type %d\n", type); - break; + for (uint8_t i = 0; (i < monitored_msg_sz) && rv; i++) { + rv = rx_counters[monitored_msgs[i]] == rx_counter_snapshot[monitored_msgs[i]]; } return rv; } /** - * @code dhcp_device_is_dhcpv4_msg_unhealthy(type, counters); + * @code dhcp_device_is_dhcp_msg_unhealthy(type, counters); * * @brief Check if DHCP relay is functioning properly for message of type 'type'. * For every rx of message 'type', there should be increment of the same message type. @@ -420,76 +254,34 @@ static bool dhcp_device_is_dhcp_inactive(uint64_t v4counters[][DHCP_DIR_COUNT][D * * @return true if DHCP message 'type' is transmitted,false otherwise */ -static bool dhcp_device_is_dhcpv4_msg_unhealthy(dhcpv4_message_type_t type, - uint64_t v4counters[][DHCP_DIR_COUNT][DHCPv4_MESSAGE_TYPE_COUNT]) +static bool dhcp_device_is_dhcp_msg_unhealthy(dhcp_message_type_t type, + uint64_t counters[][DHCP_DIR_COUNT][DHCP_MESSAGE_TYPE_COUNT]) { // check if DHCP message 'type' is being relayed - return ((v4counters[DHCP_COUNTERS_CURRENT][DHCP_RX][type] > v4counters[DHCP_COUNTERS_SNAPSHOT][DHCP_RX][type]) && - (v4counters[DHCP_COUNTERS_CURRENT][DHCP_TX][type] <= v4counters[DHCP_COUNTERS_SNAPSHOT][DHCP_TX][type]) ); + return ((counters[DHCP_COUNTERS_CURRENT][DHCP_RX][type] > counters[DHCP_COUNTERS_SNAPSHOT][DHCP_RX][type]) && + (counters[DHCP_COUNTERS_CURRENT][DHCP_TX][type] <= counters[DHCP_COUNTERS_SNAPSHOT][DHCP_TX][type]) ); } /** - * @code dhcp_device_is_dhcpv6_msg_unhealthy(type, counters); + * @code dhcp_device_check_positive_health(counters, counters_snapshot); * - * @brief Check if DHCP relay is functioning properly for message of type 'type'. - * For every rx of message 'type', there should be increment of the same message type. - * - * @param type DHCP message type - * @param counters current/snapshot counter - * - * @return true if DHCP message 'type' is transmitted,false otherwise - */ -static bool dhcp_device_is_dhcpv6_msg_unhealthy(dhcpv6_message_type_t type, - uint64_t v6counters[][DHCP_DIR_COUNT][DHCPv6_MESSAGE_TYPE_COUNT]) -{ - // check if DHCP message 'type' is being relayed - return ((v6counters[DHCP_COUNTERS_CURRENT][DHCP_RX][type] > v6counters[DHCP_COUNTERS_SNAPSHOT][DHCP_RX][type]) && - (v6counters[DHCP_COUNTERS_CURRENT][DHCP_TX][type] <= v6counters[DHCP_COUNTERS_SNAPSHOT][DHCP_TX][type]) ); -} - -/** - * @code dhcp_device_check_positive_health(v4counters, v6counters, type); - * - * @brief Check if DHCPv4/6 relay is functioning properly for monitored messages. - * DHCPv4 (Discover, Offer, Request, ACK.) and DHCPv6 (Solicit, Advertise, Request, Reply). + * @brief Check if DHCP relay is functioning properly for monitored messages (Discover, Offer, Request, ACK.) * For every rx of monitored messages, there should be increment of the same message type. * - * @param v4counters current/snapshot counter - * - * @param v6counters current/snapshot counter - * - * @param type DHCP type + * @param counters current/snapshot counter * * @return DHCP_MON_STATUS_HEALTHY, DHCP_MON_STATUS_UNHEALTHY, or DHCP_MON_STATUS_INDETERMINATE */ -static dhcp_mon_status_t dhcp_device_check_positive_health(uint64_t v4counters[][DHCP_DIR_COUNT][DHCPv4_MESSAGE_TYPE_COUNT], - uint64_t v6counters[][DHCP_DIR_COUNT][DHCPv6_MESSAGE_TYPE_COUNT], - dhcp_type_t type) +static dhcp_mon_status_t dhcp_device_check_positive_health(uint64_t counters[][DHCP_DIR_COUNT][DHCP_MESSAGE_TYPE_COUNT]) { dhcp_mon_status_t rv = DHCP_MON_STATUS_HEALTHY; bool is_dhcp_unhealthy = false; - - switch (type) - { - case DHCPv4_TYPE: - for (uint8_t i = 0; (i < v4_monitored_msg_sz) && !is_dhcp_unhealthy; i++) { - is_dhcp_unhealthy = dhcp_device_is_dhcpv4_msg_unhealthy(v4_monitored_msgs[i], v4counters); - } - break; - - case DHCPv6_TYPE: - for (uint8_t i = 0; (i < v6_monitored_msg_sz) && !is_dhcp_unhealthy; i++) { - is_dhcp_unhealthy = dhcp_device_is_dhcpv6_msg_unhealthy(v6_monitored_msgs[i], v6counters); - } - break; - - default: - syslog(LOG_ERR, "Unknown DHCP type %d\n", type); - break; + for (uint8_t i = 0; (i < monitored_msg_sz) && !is_dhcp_unhealthy; i++) { + is_dhcp_unhealthy = dhcp_device_is_dhcp_msg_unhealthy(monitored_msgs[i], counters); } - // if we have rx DORA/SARR then we should have corresponding tx DORA/SARR (DORA/SARR being relayed) + // if we have rx DORA then we should have corresponding tx DORA (DORA being relayed) if (is_dhcp_unhealthy) { rv = DHCP_MON_STATUS_UNHEALTHY; } @@ -498,47 +290,27 @@ static dhcp_mon_status_t dhcp_device_check_positive_health(uint64_t v4counters[] } /** - * @code dhcp_device_check_negative_health(v4counters, v6counters, type); + * @code dhcp_device_check_negative_health(counters); * * @brief Check that DHCP relayed messages are not being transmitted out of this interface/dev * using its counters. The interface is negatively healthy if there are not DHCP message * travelling through it. * - * @param v4counters current/snapshot counter - * @param v6counters current/snapshot counter - * @param type DHCP type + * @param counters recent interface counter + * @param counters_snapshot snapshot counters * * @return DHCP_MON_STATUS_HEALTHY, DHCP_MON_STATUS_UNHEALTHY, or DHCP_MON_STATUS_INDETERMINATE */ -static dhcp_mon_status_t dhcp_device_check_negative_health(uint64_t v4counters[][DHCP_DIR_COUNT][DHCPv4_MESSAGE_TYPE_COUNT], - uint64_t v6counters[][DHCP_DIR_COUNT][DHCPv6_MESSAGE_TYPE_COUNT], - dhcp_type_t type) +static dhcp_mon_status_t dhcp_device_check_negative_health(uint64_t counters[][DHCP_DIR_COUNT][DHCP_MESSAGE_TYPE_COUNT]) { dhcp_mon_status_t rv = DHCP_MON_STATUS_HEALTHY; + + uint64_t *tx_counters = counters[DHCP_COUNTERS_CURRENT][DHCP_TX]; + uint64_t *tx_counter_snapshot = counters[DHCP_COUNTERS_SNAPSHOT][DHCP_TX]; + bool is_dhcp_unhealthy = false; - - uint64_t *tx_counters; - uint64_t *tx_counter_snapshot; - - switch (type) - { - case DHCPv4_TYPE: - tx_counters = v4counters[DHCP_COUNTERS_CURRENT][DHCP_TX]; - tx_counter_snapshot = v4counters[DHCP_COUNTERS_SNAPSHOT][DHCP_TX]; - for (uint8_t i = 0; (i < v4_monitored_msg_sz) && !is_dhcp_unhealthy; i++) { - is_dhcp_unhealthy = tx_counters[v4_monitored_msgs[i]] > tx_counter_snapshot[v4_monitored_msgs[i]]; - } - break; - case DHCPv6_TYPE: - tx_counters = v6counters[DHCP_COUNTERS_CURRENT][DHCP_TX]; - tx_counter_snapshot = v6counters[DHCP_COUNTERS_SNAPSHOT][DHCP_TX]; - for (uint8_t i = 0; (i < v6_monitored_msg_sz) && !is_dhcp_unhealthy; i++) { - is_dhcp_unhealthy = tx_counters[v6_monitored_msgs[i]] > tx_counter_snapshot[v6_monitored_msgs[i]]; - } - break; - default: - syslog(LOG_ERR, "Unknown DHCP type %d\n", type); - break; + for (uint8_t i = 0; (i < monitored_msg_sz) && !is_dhcp_unhealthy; i++) { + is_dhcp_unhealthy = tx_counters[monitored_msgs[i]] > tx_counter_snapshot[monitored_msgs[i]]; } // for negative validation, return unhealthy if DHCP packet are being @@ -551,7 +323,7 @@ static dhcp_mon_status_t dhcp_device_check_negative_health(uint64_t v4counters[] } /** - * @code dhcp_device_check_health(check_type, v4counters, v6counters, type); + * @code dhcp_device_check_health(check_type, counters, counters_snapshot); * * @brief Check that DHCP relay is functioning properly given a check type. Positive check * indicates for every rx of DHCP message of type 'type', there would increment of @@ -560,80 +332,59 @@ static dhcp_mon_status_t dhcp_device_check_negative_health(uint64_t v4counters[] * considered unhealthy. * * @param check_type type of health check - * @param v4counters current/snapshot counters - * @param v6counters current/snapshot counters - * @param type DHCP type + * @param counters current/snapshot counter * * @return DHCP_MON_STATUS_HEALTHY, DHCP_MON_STATUS_UNHEALTHY, or DHCP_MON_STATUS_INDETERMINATE */ static dhcp_mon_status_t dhcp_device_check_health(dhcp_mon_check_t check_type, - uint64_t v4counters[][DHCP_DIR_COUNT][DHCPv4_MESSAGE_TYPE_COUNT], - uint64_t v6counters[][DHCP_DIR_COUNT][DHCPv6_MESSAGE_TYPE_COUNT], - dhcp_type_t type) + uint64_t counters[][DHCP_DIR_COUNT][DHCP_MESSAGE_TYPE_COUNT]) { dhcp_mon_status_t rv = DHCP_MON_STATUS_HEALTHY; - if (dhcp_device_is_dhcp_inactive(v4counters, v6counters, type)) { + if (dhcp_device_is_dhcp_inactive(aggregate_dev.counters)) { rv = DHCP_MON_STATUS_INDETERMINATE; } else if (check_type == DHCP_MON_CHECK_POSITIVE) { - rv = dhcp_device_check_positive_health(v4counters, v6counters, type); + rv = dhcp_device_check_positive_health(counters); } else if (check_type == DHCP_MON_CHECK_NEGATIVE) { - rv = dhcp_device_check_negative_health(v4counters, v6counters, type); + rv = dhcp_device_check_negative_health(counters); } return rv; } /** - * @code dhcp_print_counters(vlan_intf, type, v4counters, v6counters); + * @code dhcp_print_counters(vlan_intf, type, counters); * * @brief prints DHCP counters to sylsog. * - * @param vlan_intf vlan interface name - * @param type counter type - * @param v4counters interface counter - * @param v6counters interface counter + * @param vlan_intf vlan interface name + * @param type counter type + * @param counters interface counter * * @return none */ static void dhcp_print_counters(const char *vlan_intf, dhcp_counters_type_t type, - uint64_t v4counters[][DHCPv4_MESSAGE_TYPE_COUNT], - uint64_t v6counters[][DHCPv6_MESSAGE_TYPE_COUNT]) + uint64_t counters[][DHCP_MESSAGE_TYPE_COUNT]) { - static const char *v4_counter_desc[DHCP_COUNTERS_COUNT] = { - [DHCP_COUNTERS_CURRENT] = " Current", - [DHCP_COUNTERS_SNAPSHOT] = "Snapshot" - }; - static const char *v6_counter_desc[DHCP_COUNTERS_COUNT] = { + static const char *counter_desc[DHCP_COUNTERS_COUNT] = { [DHCP_COUNTERS_CURRENT] = " Current", [DHCP_COUNTERS_SNAPSHOT] = "Snapshot" }; syslog( LOG_NOTICE, - "DHCPv4 [%*s-%*s rx/tx] Discover: %*lu/%*lu, Offer: %*lu/%*lu, Request: %*lu/%*lu, ACK: %*lu/%*lu\n\ - DHCPv6 [%*s-%*s rx/tx] Solicit: %*lu/%*lu, Advertise: %*lu/%*lu, Request: %*lu/%*lu, Reply: %*lu/%*lu\n", + "[%*s-%*s rx/tx] Discover: %*lu/%*lu, Offer: %*lu/%*lu, Request: %*lu/%*lu, ACK: %*lu/%*lu\n", IF_NAMESIZE, vlan_intf, - (int) strlen(v4_counter_desc[type]), v4_counter_desc[type], - DHCP_COUNTER_WIDTH, v4counters[DHCP_RX][DHCPv4_MESSAGE_TYPE_DISCOVER], - DHCP_COUNTER_WIDTH, v4counters[DHCP_TX][DHCPv4_MESSAGE_TYPE_DISCOVER], - DHCP_COUNTER_WIDTH, v4counters[DHCP_RX][DHCPv4_MESSAGE_TYPE_OFFER], - DHCP_COUNTER_WIDTH, v4counters[DHCP_TX][DHCPv4_MESSAGE_TYPE_OFFER], - DHCP_COUNTER_WIDTH, v4counters[DHCP_RX][DHCPv4_MESSAGE_TYPE_REQUEST], - DHCP_COUNTER_WIDTH, v4counters[DHCP_TX][DHCPv4_MESSAGE_TYPE_REQUEST], - DHCP_COUNTER_WIDTH, v4counters[DHCP_RX][DHCPv4_MESSAGE_TYPE_ACK], - DHCP_COUNTER_WIDTH, v4counters[DHCP_TX][DHCPv4_MESSAGE_TYPE_ACK], - IF_NAMESIZE, vlan_intf, - (int) strlen(v6_counter_desc[type]), v6_counter_desc[type], - DHCP_COUNTER_WIDTH, v6counters[DHCP_RX][DHCPv6_MESSAGE_TYPE_SOLICIT], - DHCP_COUNTER_WIDTH, v6counters[DHCP_TX][DHCPv6_MESSAGE_TYPE_SOLICIT], - DHCP_COUNTER_WIDTH, v6counters[DHCP_RX][DHCPv6_MESSAGE_TYPE_ADVERTISE], - DHCP_COUNTER_WIDTH, v6counters[DHCP_TX][DHCPv6_MESSAGE_TYPE_ADVERTISE], - DHCP_COUNTER_WIDTH, v6counters[DHCP_RX][DHCPv6_MESSAGE_TYPE_REQUEST], - DHCP_COUNTER_WIDTH, v6counters[DHCP_TX][DHCPv6_MESSAGE_TYPE_REQUEST], - DHCP_COUNTER_WIDTH, v6counters[DHCP_RX][DHCPv6_MESSAGE_TYPE_REPLY], - DHCP_COUNTER_WIDTH, v6counters[DHCP_TX][DHCPv6_MESSAGE_TYPE_REPLY] + (int) strlen(counter_desc[type]), counter_desc[type], + DHCP_COUNTER_WIDTH, counters[DHCP_RX][DHCP_MESSAGE_TYPE_DISCOVER], + DHCP_COUNTER_WIDTH, counters[DHCP_TX][DHCP_MESSAGE_TYPE_DISCOVER], + DHCP_COUNTER_WIDTH, counters[DHCP_RX][DHCP_MESSAGE_TYPE_OFFER], + DHCP_COUNTER_WIDTH, counters[DHCP_TX][DHCP_MESSAGE_TYPE_OFFER], + DHCP_COUNTER_WIDTH, counters[DHCP_RX][DHCP_MESSAGE_TYPE_REQUEST], + DHCP_COUNTER_WIDTH, counters[DHCP_TX][DHCP_MESSAGE_TYPE_REQUEST], + DHCP_COUNTER_WIDTH, counters[DHCP_RX][DHCP_MESSAGE_TYPE_ACK], + DHCP_COUNTER_WIDTH, counters[DHCP_TX][DHCP_MESSAGE_TYPE_ACK] ); } @@ -703,12 +454,12 @@ int initialize_intf_mac_and_ip_addr(dhcp_device_context_t *context) strncpy(ifr.ifr_name, context->intf, sizeof(ifr.ifr_name) - 1); ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0'; - // Get v4 network address + // Get network address if (ioctl(fd, SIOCGIFADDR, &ifr) == -1) { syslog(LOG_ALERT, "ioctl: %s", explain_ioctl(fd, SIOCGIFADDR, &ifr)); break; } - context->ipv4 = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr; + context->ip = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr; // Get mac address if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1) { @@ -719,30 +470,6 @@ int initialize_intf_mac_and_ip_addr(dhcp_device_context_t *context) close(fd); - // Get v6 network address - memset(&context->ipv6, 0, sizeof(context->ipv6)); - struct ifaddrs *ifa, *ifa_tmp; - - if (getifaddrs(&ifa) == -1) { - syslog(LOG_ALERT, "getifaddrs failed"); - break; - } - - ifa_tmp = ifa; - while (ifa_tmp) { - // Check if current interface has a valid IPv6 address (not link local address) - if ((strncmp(ifa_tmp->ifa_name, context->intf, sizeof(context->intf)) == 0) && - (ifa_tmp->ifa_addr) && - (ifa_tmp->ifa_addr->sa_family == AF_INET6) && - (((struct sockaddr_in6*)(ifa_tmp->ifa_addr))->sin6_addr.__in6_u.__u6_addr16[0] != IPV6_LINK_LOCAL_PREFIX)) { - - struct sockaddr_in6 *in6 = (struct sockaddr_in6*) ifa_tmp->ifa_addr; - memcpy(&context->ipv6, &in6->sin6_addr, sizeof(context->ipv6)); - } - ifa_tmp = ifa_tmp->ifa_next; - } - freeifaddrs(ifa); - rv = 0; } while (0); @@ -750,41 +477,20 @@ int initialize_intf_mac_and_ip_addr(dhcp_device_context_t *context) } /** - * @code dhcp_device_get_ipv4(context); + * @code dhcp_device_get_ip(context); * * @brief Accessor method * * @param context pointer to device (interface) context * - * @return interface IPv4 + * @return interface IP */ -int dhcp_device_get_ipv4(dhcp_device_context_t *context, in_addr_t *ip) +int dhcp_device_get_ip(dhcp_device_context_t *context, in_addr_t *ip) { int rv = -1; if (context != NULL && ip != NULL) { - *ip = context->ipv4; - rv = 0; - } - - return rv; -} - -/** - * @code dhcp_device_get_ipv6(context); - * - * @brief Accessor method - * - * @param context pointer to device (interface) context - * - * @return interface IPv6 - */ -int dhcp_device_get_ipv6(dhcp_device_context_t *context, struct in6_addr *ip) -{ - int rv = -1; - - if (context != NULL && ip != NULL) { - *ip = context->ipv6; + *ip = context->ip; rv = 0; } @@ -822,8 +528,7 @@ int dhcp_device_init(dhcp_device_context_t **context, const char *intf, uint8_t dev_context->is_uplink = is_uplink; - memset(dev_context->counters.v4counters, 0, sizeof(dev_context->counters.v4counters)); - memset(dev_context->counters.v6counters, 0, sizeof(dev_context->counters.v6counters)); + memset(dev_context->counters, 0, sizeof(dev_context->counters)); *context = dev_context; rv = 0; @@ -838,15 +543,14 @@ int dhcp_device_init(dhcp_device_context_t **context, const char *intf, uint8_t } /** - * @code dhcp_device_start_capture(context, snaplen, base, giaddr_ip, v6_vlan_ip); + * @code dhcp_device_start_capture(context, snaplen, base, giaddr_ip); * * @brief starts packet capture on this interface */ int dhcp_device_start_capture(dhcp_device_context_t *context, size_t snaplen, struct event_base *base, - in_addr_t giaddr_ip, - struct in6_addr v6_vlan_ip) + in_addr_t giaddr_ip) { int rv = -1; @@ -856,20 +560,12 @@ int dhcp_device_start_capture(dhcp_device_context_t *context, break; } - // snaplen check for DHCPv4 size - if (dhcpv4_enabled && snaplen < UDPv4_START_OFFSET + sizeof(struct udphdr) + DHCPv4_OPTIONS_HEADER_SIZE) { - syslog(LOG_ALERT, "dhcp_device_start_capture(%s): snap length is too low to capture DHCPv4 options", context->intf); - break; - } - - // snaplen check for DHCPv6 size - DHCPv6 message type is the first byte of the udp payload - if (dhcpv6_enabled && snaplen < DHCPv6_START_OFFSET + 1) { - syslog(LOG_ALERT, "dhcp_device_start_capture(%s): snap length is too low to capture DHCPv6 option", context->intf); + if (snaplen < UDP_START_OFFSET + sizeof(struct udphdr) + DHCP_OPTIONS_HEADER_SIZE) { + syslog(LOG_ALERT, "dhcp_device_start_capture(%s): snap length is too low to capture DHCP options", context->intf); break; } context->giaddr_ip = giaddr_ip; - context->v6_vlan_ip = v6_vlan_ip; context->buffer = (uint8_t *) malloc(snaplen); if (context->buffer == NULL) { @@ -907,17 +603,17 @@ void dhcp_device_shutdown(dhcp_device_context_t *context) } /** - * @code dhcp_device_get_status(check_type, context, type); + * @code dhcp_device_get_status(check_type, context); * * @brief collects DHCP relay status info for a given interface. If context is null, it will report aggregate * status */ -dhcp_mon_status_t dhcp_device_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context, dhcp_type_t type) +dhcp_mon_status_t dhcp_device_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context) { dhcp_mon_status_t rv = DHCP_MON_STATUS_HEALTHY; if (context != NULL) { - rv = dhcp_device_check_health(check_type, context->counters.v4counters, context->counters.v6counters, type); + rv = dhcp_device_check_health(check_type, context->counters); } return rv; @@ -931,17 +627,9 @@ dhcp_mon_status_t dhcp_device_get_status(dhcp_mon_check_t check_type, dhcp_devic void dhcp_device_update_snapshot(dhcp_device_context_t *context) { if (context != NULL) { - if (dhcpv4_enabled) { - memcpy(context->counters.v4counters[DHCP_COUNTERS_SNAPSHOT], - context->counters.v4counters[DHCP_COUNTERS_CURRENT], - sizeof(context->counters.v4counters[DHCP_COUNTERS_SNAPSHOT])); - } - - if (dhcpv6_enabled) { - memcpy(context->counters.v6counters[DHCP_COUNTERS_SNAPSHOT], - context->counters.v6counters[DHCP_COUNTERS_CURRENT], - sizeof(context->counters.v6counters[DHCP_COUNTERS_SNAPSHOT])); - } + memcpy(context->counters[DHCP_COUNTERS_SNAPSHOT], + context->counters[DHCP_COUNTERS_CURRENT], + sizeof(context->counters[DHCP_COUNTERS_SNAPSHOT])); } } @@ -953,27 +641,6 @@ void dhcp_device_update_snapshot(dhcp_device_context_t *context) void dhcp_device_print_status(dhcp_device_context_t *context, dhcp_counters_type_t type) { if (context != NULL) { - dhcp_print_counters(context->intf, type, context->counters.v4counters[type], context->counters.v6counters[type]); + dhcp_print_counters(context->intf, type, context->counters[type]); } } - -/** - * @code dhcp_device_active_types(dhcpv4, dhcpv6); - * - * @brief update local variables with active protocols - */ -void dhcp_device_active_types(bool dhcpv4, bool dhcpv6) -{ - dhcpv4_enabled = dhcpv4; - dhcpv6_enabled = dhcpv6; -} - -/** - * @code dhcp_device_init_mgmt_intf(mgmt_intf_context); - * - * @brief assign context address of mgmt interface - */ -void dhcp_device_init_mgmt_intf(dhcp_device_context_t *mgmt_intf_context) -{ - mgmt_intf = mgmt_intf_context; -} diff --git a/src/dhcpmon/src/dhcp_device.h b/src/dhcpmon/src/dhcp_device.h index 433eb09076..aa686f4e27 100644 --- a/src/dhcpmon/src/dhcp_device.h +++ b/src/dhcpmon/src/dhcp_device.h @@ -18,43 +18,21 @@ /** - * DHCPv4 message types + * DHCP message types **/ typedef enum { - DHCPv4_MESSAGE_TYPE_DISCOVER = 1, - DHCPv4_MESSAGE_TYPE_OFFER = 2, - DHCPv4_MESSAGE_TYPE_REQUEST = 3, - DHCPv4_MESSAGE_TYPE_DECLINE = 4, - DHCPv4_MESSAGE_TYPE_ACK = 5, - DHCPv4_MESSAGE_TYPE_NAK = 6, - DHCPv4_MESSAGE_TYPE_RELEASE = 7, - DHCPv4_MESSAGE_TYPE_INFORM = 8, + DHCP_MESSAGE_TYPE_DISCOVER = 1, + DHCP_MESSAGE_TYPE_OFFER = 2, + DHCP_MESSAGE_TYPE_REQUEST = 3, + DHCP_MESSAGE_TYPE_DECLINE = 4, + DHCP_MESSAGE_TYPE_ACK = 5, + DHCP_MESSAGE_TYPE_NAK = 6, + DHCP_MESSAGE_TYPE_RELEASE = 7, + DHCP_MESSAGE_TYPE_INFORM = 8, - DHCPv4_MESSAGE_TYPE_COUNT -} dhcpv4_message_type_t; - -/** - * DHCPv6 message types - **/ -typedef enum -{ - DHCPv6_MESSAGE_TYPE_SOLICIT = 1, - DHCPv6_MESSAGE_TYPE_ADVERTISE = 2, - DHCPv6_MESSAGE_TYPE_REQUEST = 3, - DHCPv6_MESSAGE_TYPE_CONFIRM = 4, - DHCPv6_MESSAGE_TYPE_RENEW = 5, - DHCPv6_MESSAGE_TYPE_REBIND = 6, - DHCPv6_MESSAGE_TYPE_REPLY = 7, - DHCPv6_MESSAGE_TYPE_RELEASE = 8, - DHCPv6_MESSAGE_TYPE_DECLINE = 9, - DHCPv6_MESSAGE_TYPE_RECONFIGURE = 10, - DHCPv6_MESSAGE_TYPE_INFORMATION_REQUEST = 11, - DHCPv6_MESSAGE_TYPE_RELAY_FORWARD = 12, - DHCPv6_MESSAGE_TYPE_RELAY_REPLY = 13, - - DHCPv6_MESSAGE_TYPE_COUNT -} dhcpv6_message_type_t; + DHCP_MESSAGE_TYPE_COUNT +} dhcp_message_type_t; /** packet direction */ typedef enum @@ -82,13 +60,6 @@ typedef enum DHCP_MON_STATUS_INDETERMINATE, /** DHCP relay health could not be determined */ } dhcp_mon_status_t; -/** dhcp type */ -typedef enum -{ - DHCPv4_TYPE, - DHCPv6_TYPE, -} dhcp_type_t; - /** dhcp check type */ typedef enum { @@ -96,28 +67,19 @@ typedef enum DHCP_MON_CHECK_POSITIVE, /** Validate that received DORA packets are relayed */ } dhcp_mon_check_t; -typedef struct -{ - uint64_t v4counters[DHCP_COUNTERS_COUNT][DHCP_DIR_COUNT][DHCPv4_MESSAGE_TYPE_COUNT]; - /** current/snapshot counters of DHCPv4 packets */ - uint64_t v6counters[DHCP_COUNTERS_COUNT][DHCP_DIR_COUNT][DHCPv6_MESSAGE_TYPE_COUNT]; - /** current/snapshot counters of DHCPv6 packets */ -} counters_t; - /** DHCP device (interface) context */ typedef struct { int sock; /** Raw socket associated with this device/interface */ - in_addr_t ipv4; /** ipv4 network address of this device (interface) */ - struct in6_addr ipv6; /** ipv6 network address of this device (interface) */ + in_addr_t ip; /** network address of this device (interface) */ uint8_t mac[ETHER_ADDR_LEN]; /** hardware address of this device (interface) */ - in_addr_t giaddr_ip; /** Gateway IPv4 address */ - struct in6_addr v6_vlan_ip; /** Vlan IPv6 address */ + in_addr_t giaddr_ip; /** Gateway IP address */ uint8_t is_uplink; /** north interface? */ char intf[IF_NAMESIZE]; /** device (interface) name */ uint8_t *buffer; /** buffer used to read socket data */ size_t snaplen; /** snap length or buffer size */ - counters_t counters; /** counters for DHCPv4/6 packets */ + uint64_t counters[DHCP_COUNTERS_COUNT][DHCP_DIR_COUNT][DHCP_MESSAGE_TYPE_COUNT]; + /** current/snapshot counters of DHCP packets */ } dhcp_device_context_t; /** @@ -132,28 +94,16 @@ typedef struct int initialize_intf_mac_and_ip_addr(dhcp_device_context_t *context); /** - * @code dhcp_device_get_ipv4(context, ip); + * @code dhcp_device_get_ip(context, ip); * * @brief Accessor method * * @param context pointer to device (interface) context - * @param ip(out) pointer to device IPv4 + * @param ip(out) pointer to device IP * * @return 0 on success, otherwise for failure */ -int dhcp_device_get_ipv4(dhcp_device_context_t *context, in_addr_t *ip); - -/** - * @code dhcp_device_get_ipv6(context, ip); - * - * @brief Accessor method - * - * @param context pointer to device (interface) context - * @param ip(out) pointer to device IPv6 - * - * @return 0 on success, otherwise for failure - */ -int dhcp_device_get_ipv6(dhcp_device_context_t *context, struct in6_addr *ip); +int dhcp_device_get_ip(dhcp_device_context_t *context, in_addr_t *ip); /** * @code dhcp_device_get_aggregate_context(); @@ -180,7 +130,7 @@ int dhcp_device_init(dhcp_device_context_t **context, uint8_t is_uplink); /** - * @code dhcp_device_start_capture(context, snaplen, base, giaddr_ip, v6_vlan_ip); + * @code dhcp_device_start_capture(context, snaplen, base, giaddr_ip); * * @brief starts packet capture on this interface * @@ -188,15 +138,13 @@ int dhcp_device_init(dhcp_device_context_t **context, * @param snaplen length of packet capture * @param base pointer to libevent base * @param giaddr_ip gateway IP address - * @param v6_vlan_ip vlan IPv6 address * * @return 0 on success, otherwise for failure */ int dhcp_device_start_capture(dhcp_device_context_t *context, size_t snaplen, struct event_base *base, - in_addr_t giaddr_ip, - struct in6_addr v6_vlan_ip); + in_addr_t giaddr_ip); /** * @code dhcp_device_shutdown(context); @@ -210,18 +158,17 @@ int dhcp_device_start_capture(dhcp_device_context_t *context, void dhcp_device_shutdown(dhcp_device_context_t *context); /** - * @code dhcp_device_get_status(check_type, context, type); + * @code dhcp_device_get_status(check_type, context); * * @brief collects DHCP relay status info for a given interface. If context is null, it will report aggregate * status * * @param check_type Type of validation * @param context Device (interface) context - * @param type DHCP type * * @return DHCP_MON_STATUS_HEALTHY, DHCP_MON_STATUS_UNHEALTHY, or DHCP_MON_STATUS_INDETERMINATE */ -dhcp_mon_status_t dhcp_device_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context, dhcp_type_t type); +dhcp_mon_status_t dhcp_device_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context); /** * @code dhcp_device_update_snapshot(context); @@ -238,32 +185,10 @@ void dhcp_device_update_snapshot(dhcp_device_context_t *context); * @brief prints status counters to syslog. If context is null, it will print aggregate status * * @param context Device (interface) context - * @param type Counter type to be printed + * @param counters_type Counter type to be printed * * @return none */ void dhcp_device_print_status(dhcp_device_context_t *context, dhcp_counters_type_t type); -/** - * @code dhcp_device_active_types(dhcpv4, dhcpv6); - * - * @brief update local variables with active protocols - * - * @param dhcpv4 DHCPv4 enable flag - * @param dhcpv6 DHCPv6 enable flag - * - * @return none - */ -void dhcp_device_active_types(bool dhcpv4, bool dhcpv6); - -/** - * @code dhcp_device_init_mgmt_intf(mgmt_intf_context); - * - * @brief assign context address of mgmt interface - * - * @param mgmt_intf_context MGMT interface context struct address - * - * @return none - */ -void dhcp_device_init_mgmt_intf(dhcp_device_context_t *mgmt_intf_context); #endif /* DHCP_DEVICE_H_ */ diff --git a/src/dhcpmon/src/dhcp_devman.c b/src/dhcpmon/src/dhcp_devman.c index b36d926c1d..65484798db 100644 --- a/src/dhcpmon/src/dhcp_devman.c +++ b/src/dhcpmon/src/dhcp_devman.c @@ -9,8 +9,6 @@ #include #include #include -#include -#include #include "dhcp_devman.h" @@ -37,8 +35,7 @@ static uint32_t dhcp_num_mgmt_intf = 0; /** On Device vlan interface IP address corresponding vlan downlink IP * This IP is used to filter Offer/Ack packet coming from DHCP server */ -static in_addr_t v4_vlan_ip = 0; -static struct in6_addr v6_vlan_ip = {0}; +static in_addr_t vlan_ip = 0; /* Device loopback interface ip, which will be used as the giaddr in dual tor setup. */ static in_addr_t loopback_ip = 0; @@ -139,8 +136,7 @@ int dhcp_devman_add_intf(const char *name, char intf_type) rv = dhcp_device_init(&dev->dev_context, dev->name, dev->is_uplink); if (rv == 0 && intf_type == 'd') { - rv = dhcp_device_get_ipv4(dev->dev_context, &v4_vlan_ip); - rv = dhcp_device_get_ipv6(dev->dev_context, &v6_vlan_ip); + rv = dhcp_device_get_ip(dev->dev_context, &vlan_ip); dhcp_device_context_t *agg_dev = dhcp_device_get_aggregate_context(); @@ -148,9 +144,6 @@ int dhcp_devman_add_intf(const char *name, char intf_type) strncpy(agg_dev->intf + sizeof(AGG_DEV_PREFIX) - 1, name, sizeof(agg_dev->intf) - sizeof(AGG_DEV_PREFIX)); agg_dev->intf[sizeof(agg_dev->intf) - 1] = '\0'; } - else if (rv == 0 && intf_type == 'm') { - dhcp_device_init_mgmt_intf(dev->dev_context); - } LIST_INSERT_HEAD(&intfs, dev, entry); } @@ -181,7 +174,7 @@ int dhcp_devman_setup_dual_tor_mode(const char *name) } if (initialize_intf_mac_and_ip_addr(&loopback_intf_context) == 0 && - dhcp_device_get_ipv4(&loopback_intf_context, &loopback_ip) == 0) { + dhcp_device_get_ip(&loopback_intf_context, &loopback_ip) == 0) { dual_tor_mode = 1; } else { syslog(LOG_ALERT, "failed to retrieve ip addr for loopback interface (%s)", name); @@ -204,13 +197,11 @@ int dhcp_devman_start_capture(size_t snaplen, struct event_base *base) if ((dhcp_num_south_intf == 1) && (dhcp_num_north_intf >= 1)) { LIST_FOREACH(int_ptr, &intfs, entry) { - rv = dhcp_device_start_capture(int_ptr->dev_context, snaplen, base, dual_tor_mode ? loopback_ip : v4_vlan_ip, v6_vlan_ip); + rv = dhcp_device_start_capture(int_ptr->dev_context, snaplen, base, dual_tor_mode ? loopback_ip : vlan_ip); if (rv == 0) { - char ipv6_addr[INET6_ADDRSTRLEN]; - inet_ntop(AF_INET6, &int_ptr->dev_context->ipv6, ipv6_addr, sizeof(ipv6_addr)); syslog(LOG_INFO, - "Capturing DHCP packets on interface %s, ipv4: 0x%08x, ipv6: %s, mac [%02x:%02x:%02x:%02x:%02x:%02x] \n", - int_ptr->name, int_ptr->dev_context->ipv4, ipv6_addr, int_ptr->dev_context->mac[0], + "Capturing DHCP packets on interface %s, ip: 0x%08x, mac [%02x:%02x:%02x:%02x:%02x:%02x] \n", + int_ptr->name, int_ptr->dev_context->ip, int_ptr->dev_context->mac[0], int_ptr->dev_context->mac[1], int_ptr->dev_context->mac[2], int_ptr->dev_context->mac[3], int_ptr->dev_context->mac[4], int_ptr->dev_context->mac[5]); } @@ -228,13 +219,13 @@ int dhcp_devman_start_capture(size_t snaplen, struct event_base *base) } /** - * @code dhcp_devman_get_status(check_type, context, type); + * @code dhcp_devman_get_status(check_type, context); * * @brief collects DHCP relay status info. */ -dhcp_mon_status_t dhcp_devman_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context, dhcp_type_t type) +dhcp_mon_status_t dhcp_devman_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context) { - return dhcp_device_get_status(check_type, context, type); + return dhcp_device_get_status(check_type, context); } /** @@ -276,13 +267,3 @@ void dhcp_devman_print_status(dhcp_device_context_t *context, dhcp_counters_type dhcp_device_print_status(context, type); } } - -/** - * @code dhcp_devman_active_types(dhcpv4, dhcpv6); - * - * @brief update local variables with active protocols - */ -void dhcp_devman_active_types(bool dhcpv4, bool dhcpv6) -{ - dhcp_device_active_types(dhcpv4, dhcpv6); -} diff --git a/src/dhcpmon/src/dhcp_devman.h b/src/dhcpmon/src/dhcp_devman.h index 6e30c654f6..948e79cde4 100644 --- a/src/dhcpmon/src/dhcp_devman.h +++ b/src/dhcpmon/src/dhcp_devman.h @@ -87,17 +87,16 @@ int dhcp_devman_setup_dual_tor_mode(const char *name); int dhcp_devman_start_capture(size_t snaplen, struct event_base *base); /** - * @code dhcp_devman_get_status(check_type, context, type); + * @code dhcp_devman_get_status(check_type, context); * * @brief collects DHCP relay status info. * * @param check_type Type of validation * @param context pointer to device (interface) context - * @param type DHCP type * * @return DHCP_MON_STATUS_HEALTHY, DHCP_MON_STATUS_UNHEALTHY, or DHCP_MON_STATUS_INDETERMINATE */ -dhcp_mon_status_t dhcp_devman_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context, dhcp_type_t type); +dhcp_mon_status_t dhcp_devman_get_status(dhcp_mon_check_t check_type, dhcp_device_context_t *context); /** * @code dhcp_devman_update_snapshot(context); @@ -120,16 +119,4 @@ void dhcp_devman_update_snapshot(dhcp_device_context_t *context); */ void dhcp_devman_print_status(dhcp_device_context_t *context, dhcp_counters_type_t type); -/** - * @code dhcp_devman_active_types(dhcpv4, dhcpv6); - * - * @brief update local variables with active protocols - * - * @param dhcpv4 flag indicating dhcpv4 is enabled - * @param dhcpv6 flag indicating dhcpv6 is enabled - * - * @return none - */ -void dhcp_devman_active_types(bool dhcpv4, bool dhcpv6); - #endif /* DHCP_DEVMAN_H_ */ diff --git a/src/dhcpmon/src/dhcp_mon.c b/src/dhcpmon/src/dhcp_mon.c index 2777b64840..74d9869741 100644 --- a/src/dhcpmon/src/dhcp_mon.c +++ b/src/dhcpmon/src/dhcp_mon.c @@ -12,24 +12,16 @@ #include #include #include -#include #include "dhcp_mon.h" #include "dhcp_devman.h" -/** DHCP device/interface state counters */ -typedef struct -{ - int v4_count; /** count in the number of DHCPv4 unhealthy checks */ - int v6_count; /** count in the number of DHCPv6 unhealthy checks */ -} dhcp_mon_count_t; - /** DHCP device/interface state */ typedef struct { dhcp_mon_check_t check_type; /** check type */ dhcp_device_context_t* (*get_context)(); /** functor to a device context accessor function */ - dhcp_mon_count_t counters; /** count in the number of unhealthy checks */ + int count; /** count in the number of unhealthy checks */ const char *msg; /** message to be printed if unhealthy state is determined */ } dhcp_mon_state_t; @@ -37,10 +29,6 @@ typedef struct static int window_interval_sec = 18; /** dhcp_unhealthy_max_count max count of consecutive unhealthy statuses before reporting to syslog */ static int dhcp_unhealthy_max_count = 10; -/** DHCP versions flags */ -static bool dhcpv4_enabled; -static bool dhcpv6_enabled; - /** libevent base struct */ static struct event_base *base; /** libevent timeout event struct */ @@ -57,15 +45,13 @@ static dhcp_mon_state_t state_data[] = { [0] = { .check_type = DHCP_MON_CHECK_POSITIVE, .get_context = dhcp_devman_get_agg_dev, - .counters.v4_count = 0, - .counters.v6_count = 0, + .count = 0, .msg = "dhcpmon detected disparity in DHCP Relay behavior. Duration: %d (sec) for vlan: '%s'\n" }, [1] = { .check_type = DHCP_MON_CHECK_NEGATIVE, .get_context = dhcp_devman_get_mgmt_dev, - .counters.v4_count = 0, - .counters.v6_count = 0, + .count = 0, .msg = "dhcpmon detected DHCP packets traveling through mgmt interface (please check BGP routes.)" " Duration: %d (sec) for intf: '%s'\n" } @@ -92,89 +78,36 @@ static void signal_callback(evutil_socket_t fd, short event, void *arg) } /** - * @code check_dhcp_relay_health(state_data, dhcp_type); + * @code check_dhcp_relay_health(state_data); * * @brief check DHCP relay overall health * * @param state_data pointer to dhcpmon state data * - * @param type DHCP type - * * @return none */ -static void check_dhcp_relay_health(dhcp_mon_state_t *state_data, dhcp_type_t type) +static void check_dhcp_relay_health(dhcp_mon_state_t *state_data) { dhcp_device_context_t *context = state_data->get_context(); - dhcp_mon_status_t dhcp_mon_status = dhcp_devman_get_status(state_data->check_type, context, type); + dhcp_mon_status_t dhcp_mon_status = dhcp_devman_get_status(state_data->check_type, context); switch (dhcp_mon_status) { case DHCP_MON_STATUS_UNHEALTHY: - switch (type) - { - case DHCPv4_TYPE: - if (++state_data->counters.v4_count > dhcp_unhealthy_max_count) { - syslog(LOG_ALERT, state_data->msg, state_data->counters.v4_count * window_interval_sec, context->intf); - dhcp_devman_print_status(context, DHCP_COUNTERS_SNAPSHOT); - dhcp_devman_print_status(context, DHCP_COUNTERS_CURRENT); - } - break; - case DHCPv6_TYPE: - if (++state_data->counters.v6_count > dhcp_unhealthy_max_count) { - syslog(LOG_ALERT, state_data->msg, state_data->counters.v6_count * window_interval_sec, context->intf); - dhcp_devman_print_status(context, DHCP_COUNTERS_SNAPSHOT); - dhcp_devman_print_status(context, DHCP_COUNTERS_CURRENT); - } - break; - - default: - syslog(LOG_ERR, "Unknown DHCP type %d\n", type); - break; + if (++state_data->count > dhcp_unhealthy_max_count) { + syslog(LOG_ALERT, state_data->msg, state_data->count * window_interval_sec, context->intf); + dhcp_devman_print_status(context, DHCP_COUNTERS_SNAPSHOT); + dhcp_devman_print_status(context, DHCP_COUNTERS_CURRENT); } break; - case DHCP_MON_STATUS_HEALTHY: - switch (type) - { - case DHCPv4_TYPE: - state_data->counters.v4_count = 0; - break; - case DHCPv6_TYPE: - state_data->counters.v6_count = 0; - break; - default: - syslog(LOG_ERR, "Unknown DHCP type %d\n", type); - break; - } + state_data->count = 0; break; - case DHCP_MON_STATUS_INDETERMINATE: - switch (type) - { - case DHCPv4_TYPE: - if (state_data->counters.v4_count) { - if (++state_data->counters.v4_count > dhcp_unhealthy_max_count) { - syslog(LOG_ALERT, state_data->msg, state_data->counters.v4_count * window_interval_sec, context->intf); - dhcp_devman_print_status(context, DHCP_COUNTERS_SNAPSHOT); - dhcp_devman_print_status(context, DHCP_COUNTERS_CURRENT); - } - } - break; - case DHCPv6_TYPE: - if (state_data->counters.v6_count) { - if (++state_data->counters.v6_count > dhcp_unhealthy_max_count) { - syslog(LOG_ALERT, state_data->msg, state_data->counters.v6_count * window_interval_sec, context->intf); - dhcp_devman_print_status(context, DHCP_COUNTERS_SNAPSHOT); - dhcp_devman_print_status(context, DHCP_COUNTERS_CURRENT); - } - } - break; - default: - syslog(LOG_ERR, "Unknown DHCP type %d\n", type); - break; + if (state_data->count) { + state_data->count++; } break; - default: syslog(LOG_ERR, "DHCP Relay returned unknown status %d\n", dhcp_mon_status); break; @@ -195,12 +128,7 @@ static void check_dhcp_relay_health(dhcp_mon_state_t *state_data, dhcp_type_t ty static void timeout_callback(evutil_socket_t fd, short event, void *arg) { for (uint8_t i = 0; i < sizeof(state_data) / sizeof(*state_data); i++) { - if (dhcpv4_enabled) { - check_dhcp_relay_health(&state_data[i], DHCPv4_TYPE); - } - if (dhcpv6_enabled) { - check_dhcp_relay_health(&state_data[i], DHCPv6_TYPE); - } + check_dhcp_relay_health(&state_data[i]); } dhcp_devman_update_snapshot(NULL); @@ -213,17 +141,13 @@ static void timeout_callback(evutil_socket_t fd, short event, void *arg) * seconds. It also writes to syslog when dhcp relay has been unhealthy for consecutive max_count checks. * */ -int dhcp_mon_init(int window_sec, int max_count, bool dhcpv4, bool dhcpv6) +int dhcp_mon_init(int window_sec, int max_count) { int rv = -1; do { window_interval_sec = window_sec; dhcp_unhealthy_max_count = max_count; - dhcpv4_enabled = dhcpv4; - dhcpv6_enabled = dhcpv6; - - dhcp_devman_active_types(dhcpv4, dhcpv6); base = event_base_new(); if (base == NULL) { diff --git a/src/dhcpmon/src/dhcp_mon.h b/src/dhcpmon/src/dhcp_mon.h index facd46da68..ae8911ab51 100644 --- a/src/dhcpmon/src/dhcp_mon.h +++ b/src/dhcpmon/src/dhcp_mon.h @@ -17,12 +17,10 @@ * * @param window_sec time interval between health checks * @param max_count max count of consecutive unhealthy statuses before reporting to syslog - * @param dhcpv4 flag indicating dhcpv4 is enabled - * @param dhcpv6 flag indicating dhcpv6 is enabled * * @return 0 upon success, otherwise upon failure */ -int dhcp_mon_init(int window_sec, int max_count, bool dhcpv4, bool dhcpv6); +int dhcp_mon_init(int window_sec, int max_count); /** * @code dhcp_mon_shutdown(); diff --git a/src/dhcpmon/src/main.c b/src/dhcpmon/src/main.c index 1cf9318214..29bc534acc 100644 --- a/src/dhcpmon/src/main.c +++ b/src/dhcpmon/src/main.c @@ -16,7 +16,6 @@ #include #include #include -#include #include "dhcp_mon.h" #include "dhcp_devman.h" @@ -42,8 +41,7 @@ static const uint32_t dhcpmon_default_unhealthy_max_count = 10; static void usage(const char *prog) { printf("Usage: %s -id {-iu }+ -im [-u ]" - "[-w ] [-c ] [-s ]" - "[-4 ] [-6 ] [-d]\n", prog); + "[-w ] [-c ] [-s ] [-d]\n", prog); printf("where\n"); printf("\tsouth interface: is a vlan interface,\n"); printf("\tnorth interface: is a TOR-T1 interface,\n"); @@ -114,8 +112,6 @@ int main(int argc, char **argv) int max_unhealthy_count = dhcpmon_default_unhealthy_max_count; size_t snaplen = dhcpmon_default_snaplen; int make_daemon = 0; - bool dhcpv4_enabled = false; - bool dhcpv6_enabled = false; setlogmask(LOG_UPTO(LOG_INFO)); openlog(basename(argv[0]), LOG_CONS | LOG_PID | LOG_NDELAY, LOG_DAEMON); @@ -159,14 +155,6 @@ int main(int argc, char **argv) max_unhealthy_count = atoi(argv[i + 1]); i += 2; break; - case '4': - dhcpv4_enabled = true; - i++; - break; - case '6': - dhcpv6_enabled = true; - i++; - break; default: fprintf(stderr, "%s: %c: Unknown option\n", basename(argv[0]), argv[i][1]); usage(basename(argv[0])); @@ -177,11 +165,7 @@ int main(int argc, char **argv) dhcpmon_daemonize(); } - if (!dhcpv4_enabled && !dhcpv6_enabled) { - dhcpv4_enabled = true; - } - - if ((dhcp_mon_init(window_interval, max_unhealthy_count, dhcpv4_enabled, dhcpv6_enabled) == 0) && + if ((dhcp_mon_init(window_interval, max_unhealthy_count) == 0) && (dhcp_mon_start(snaplen) == 0)) { rv = EXIT_SUCCESS; diff --git a/src/sonic-config-engine/tests/sample_output/py2/docker-dhcp-relay.supervisord.conf b/src/sonic-config-engine/tests/sample_output/py2/docker-dhcp-relay.supervisord.conf index a9004e2b00..407ac2c80b 100644 --- a/src/sonic-config-engine/tests/sample_output/py2/docker-dhcp-relay.supervisord.conf +++ b/src/sonic-config-engine/tests/sample_output/py2/docker-dhcp-relay.supervisord.conf @@ -68,7 +68,7 @@ dependent_startup_wait_for=start:exited programs=dhcpmon-Vlan1000 [program:dhcpmon-Vlan1000] -command=/usr/sbin/dhcpmon -id Vlan1000 -iu Vlan2000 -iu PortChannel02 -iu PortChannel03 -iu PortChannel04 -iu PortChannel01 -im eth0 -4 -6 +command=/usr/sbin/dhcpmon -id Vlan1000 -iu Vlan2000 -iu PortChannel02 -iu PortChannel03 -iu PortChannel04 -iu PortChannel01 -im eth0 priority=4 autostart=false autorestart=false diff --git a/src/sonic-config-engine/tests/sample_output/py3/docker-dhcp-relay.supervisord.conf b/src/sonic-config-engine/tests/sample_output/py3/docker-dhcp-relay.supervisord.conf index 521899b939..5456409738 100644 --- a/src/sonic-config-engine/tests/sample_output/py3/docker-dhcp-relay.supervisord.conf +++ b/src/sonic-config-engine/tests/sample_output/py3/docker-dhcp-relay.supervisord.conf @@ -68,7 +68,7 @@ dependent_startup_wait_for=start:exited programs=dhcpmon-Vlan1000 [program:dhcpmon-Vlan1000] -command=/usr/sbin/dhcpmon -id Vlan1000 -iu Vlan2000 -iu PortChannel01 -iu PortChannel02 -iu PortChannel03 -iu PortChannel04 -im eth0 -4 -6 +command=/usr/sbin/dhcpmon -id Vlan1000 -iu Vlan2000 -iu PortChannel01 -iu PortChannel02 -iu PortChannel03 -iu PortChannel04 -im eth0 priority=4 autostart=false autorestart=false