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+ /*
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+ # SPDX-License-Identifier: LGPL-2.1+
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+ # ~~~
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+ # Description: libpcap tests
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+ #
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+ # Author: Susant Sahani <susant@redhat.com>
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+ # Copyright (c) 2018 Red Hat, Inc.
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+ # ~~~
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+ */
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+ #include <stdlib.h>
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+ #include <stdarg.h>
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+ #include <string.h>
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+ #include <netinet/in.h>
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+ #include <setjmp.h>
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+ #include <inttypes.h>
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+ #include <cmocka.h>
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+ #include <netdb.h>
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+ #include <arpa/inet.h>
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+ #include <errno.h>
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+ #include <unistd.h>
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+ #include <libnet.h>
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+ #include <netinet/if_ether.h>
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+ #include <sys/socket.h>
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+ #include <netinet/ip.h>
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+ #include <netinet/in.h>
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+ #include <netinet/tcp.h>
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+ #include <arpa/inet.h>
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+ #include <netinet/if_ether.h>
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+ #include <pcap.h>
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+ #include <pthread.h>
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+ #include <sys/time.h>
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+
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+ #define PCAP_FILE "/var/run/libpcap-test.pcap"
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+
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+ pcap_t *handle;
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+
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+ struct UDP_hdr {
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+ u_short uh_sport; /* source port */
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+ u_short uh_dport; /* destination port */
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+ u_short uh_ulen; /* datagram length */
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+ u_short uh_sum; /* datagram checksum */
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+ };
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+
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+ static void assert_packet(u_char *args, const struct pcap_pkthdr *header, const u_char *packet) {
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+ unsigned int ipl;
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+ uint32_t src, dst;
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+ struct ip *ip;
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+ struct ether_header *eth_header;
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+
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+ eth_header = (struct ether_header *) packet;
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+ if (ntohs(eth_header->ether_type) != ETHERTYPE_IP)
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+ return;
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+
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+ packet += sizeof(struct ether_header);
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+ ip = (struct ip *) packet;
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+ ipl = ip->ip_hl * 4;
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+
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+ src = inet_addr("192.168.50.6");
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+ dst = inet_addr("192.168.50.5");
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+
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+ assert_memory_equal(&dst, &ip->ip_dst, sizeof(uint32_t));
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+ assert_memory_equal(&src, &ip->ip_src, sizeof(uint32_t));
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+
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+ if (ip->ip_p == IPPROTO_UDP) {
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+ struct UDP_hdr *udp;
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+
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+ packet += ipl;
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+
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+ udp = (struct UDP_hdr *) packet;
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+
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+ printf("UDP src_port=%d dst_port=%d\n", ntohs(udp->uh_sport), ntohs(udp->uh_dport));
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+
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+ assert_int_equal(2425, ntohs(udp->uh_sport));
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+ assert_int_equal(2426, ntohs(udp->uh_dport));
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+ } else if (ip->ip_p == IPPROTO_TCP) {
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+ struct tcphdr *tcp;
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+ packet += ipl;
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+
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+ tcp = (struct tcphdr *) packet;
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+
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+ printf("TCP src_port=%d dst_port=%d\n", ntohs(tcp->th_sport), ntohs(tcp->th_dport));
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+
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+ assert_int_equal(2425, ntohs(tcp->th_sport));
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+ assert_int_equal(2426, ntohs(tcp->th_dport));
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+ }
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+ }
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+
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+ void *capture_packet_live(void *ptr) {
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+ char dev[] = "veth-test";
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+ char error_buffer[PCAP_ERRBUF_SIZE];
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+ struct bpf_program filter;
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+ bpf_u_int32 subnet_mask, ip;
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+ int total_packet_count;
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+ int r;
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+
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+ r = pcap_lookupnet(dev, &ip, &subnet_mask, error_buffer);
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+ assert_true(r >=0);
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+
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+ handle = pcap_open_live(dev, BUFSIZ, 1, 1000, error_buffer);
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+ assert_non_null(handle);
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+
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+ r = pcap_compile(handle, &filter, ptr, 0, ip);
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+ assert_true(r >= 0);
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+
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+ r = pcap_setfilter(handle, &filter);
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+ assert_true(r >= 0);
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+
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+ pcap_loop(handle, total_packet_count, assert_packet, NULL);
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+
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+ return 0;
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+ }
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+
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+ void terminate_thread(int signum) {
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+
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+ pcap_breakloop(handle);
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+ pcap_close(handle);
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+
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+ handle = NULL;
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+ pthread_exit(NULL);
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+ }
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+
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+ static void test_udp_packet_ipv4(void **state) {
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+ char dst[6] = {0xff,0xff,0xff,0xff,0xff,0xff};
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+ char src[6] = {0x12,0x34,0x56,0x78,0x9a,0xab};
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+ char err_buf[LIBNET_ERRBUF_SIZE] = {};
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+ char buf[1024] = {};
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+ libnet_t* l;
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+ int r, i;
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+ uint32_t len;
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+ pthread_t pcap_thread;
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+ struct itimerval tval;
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+
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+ timerclear(& tval.it_interval); /* zero interval means no reset of timer */
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+ timerclear(& tval.it_value);
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+ tval.it_value.tv_sec = 10; /* 10 second timeout */
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+
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+ (void) signal(SIGALRM, terminate_thread);
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+ (void) setitimer(ITIMER_REAL, & tval, NULL);
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+
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+ r = pthread_create(&pcap_thread, NULL, capture_packet_live, "udp port 2425");
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+ assert_true(r >=0);
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+
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+ l = libnet_init(LIBNET_LINK_ADV, "veth-peer", err_buf);
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+ assert_non_null(l);
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+ len = sprintf(buf, "1:1:1111111111111:32:hello world%d", 1);
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+
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+ for (i = 0; i < 5; i++) {
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+
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+ r = libnet_build_udp(2425, 2426, len + 8, 0, buf, len, l, 0);
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+ assert_true(r >= 0);
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+
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+ r = libnet_build_ipv4(20 + 8 + len, 0, 0, 0, 128, 17, 0, inet_addr("192.168.50.6"), inet_addr("192.168.50.5"), NULL, 0, l, 0);
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+ assert_true(r >= 0);
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+
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+ r = libnet_build_ethernet(dst, src, 0x0800, NULL, 0, l, 0);
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+ assert_true(r >= 0);
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+
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+ r = libnet_write(l);
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+ assert_true(r >= 0);
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+
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+ sleep(1);
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+ }
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+
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+ libnet_destroy(l);
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+ }
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+
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+ static void test_tcp_packet_ipv4(void **state) {
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+ char dst[6] = {0xff,0xff,0xff,0xff,0xff,0xff};
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+ char src[6] = {0x12,0x34,0x56,0x78,0x9a,0xab};
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+ char errbuf[LIBNET_ERRBUF_SIZE];
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+ uint8_t *payload, payload_s;
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+ libnet_ptag_t tcp, ip, eth;
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+ int c, i, j, seqn, ack;
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+ char buf[1024] = {};
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+ pthread_t pcap_thread;
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+ struct itimerval tval;
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+ uint32_t len;
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+ libnet_t *l;
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+ int r;
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+
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+ timerclear(& tval.it_interval);
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+ timerclear(& tval.it_value);
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+ tval.it_value.tv_sec = 10;
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+
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+ (void) signal(SIGALRM, terminate_thread);
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+ (void) setitimer(ITIMER_REAL, & tval, NULL);
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+
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+ r = pthread_create(&pcap_thread, NULL, capture_packet_live, "tcp port 2425");
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+ assert_true(r >=0);
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+
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+ payload_s = 10;
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+ payload = malloc(payload_s*sizeof(uint8_t));
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+ assert_non_null(payload);
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+ memset(payload,0,payload_s);
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+
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+ l = libnet_init(LIBNET_LINK, "veth-peer", errbuf);
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+ assert_non_null(l);
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+
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+ tcp = ip = eth = LIBNET_PTAG_INITIALIZER;
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+ for (i=0; i<5; i++){
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+ seqn=i * (LIBNET_TCP_H+payload_s + 1);
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+ r = libnet_build_tcp(2425, 2426, seqn, seqn + LIBNET_TCP_H + payload_s + 1,
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+ TH_SYN, 32767, 0, 10, LIBNET_TCP_H + payload_s,
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+ payload, payload_s, l, tcp);
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+ assert_true(r >=0);
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+
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+ r = libnet_build_ipv4(LIBNET_IPV4_H + LIBNET_TCP_H + payload_s,0,242,0,64,IPPROTO_TCP,0,
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+ inet_addr("192.168.50.6"), inet_addr("192.168.50.5"),
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+ NULL,0,l,ip);
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+ assert_true(r >=0);
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+
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+ r = libnet_build_ethernet(dst, src, ETHERTYPE_IP, NULL, 0, l, eth);
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+ assert_true(r >=0);
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+
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+ r = libnet_write(l);
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+ assert_true(r >=0);
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+
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+ sleep(1);
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+ }
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+ }
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+
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+ int main(int argc, char *argv[]) {
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+ const struct CMUnitTest libpcap_tests[] = {
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+ cmocka_unit_test(test_udp_packet_ipv4),
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+ cmocka_unit_test(test_tcp_packet_ipv4),
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+ };
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+
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+ return cmocka_run_group_tests(libpcap_tests, NULL, NULL);
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+ }
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ssahani
commented 5 years ago
justification
Adds tests according to the CI wiki specifically the standard test interface in the spec.
The playbook includes Tier1 level test cases that have been tested in the following contexts and
is passing reliably: Classic. Test logs are stored in the artifacts directory.
The following steps are used to execute the tests using the standard test interface:
Test enveronment
Make sure you have installed packages from the spec
Run tests for Classic
Snip of the example test run for Classic tests: