arp.c
#include <rte_eal.h> #include <rte_ethdev.h> #include <rte_mbuf.h> #include <stdio.h> #include <arpa/inet.h> #define ENABLE_SEND 1 #define ENABLE_ARP 1 #define NUM_MBUFS (4096-1) #define BURST_SIZE 32 #if ENABLE_SEND #define MAKE_IPV4_ADDR(a, b, c, d) (a + (b<<8) + (c<<16) + (d<<24)) static uint32_t gLocalIp = MAKE_IPV4_ADDR(192, 168, 222, 92); static uint32_t gSrcIp; // static uint32_t gDstIp; static uint8_t gSrcMac[RTE_ETHER_ADDR_LEN]; static uint8_t gDstMac[RTE_ETHER_ADDR_LEN]; static uint16_t gSrcPort; static uint16_t gDstPort; #endif int gDpdkPortId = 0; static const struct rte_eth_conf port_conf_default = { .rxmode = {.max_rx_pkt_len = RTE_ETHER_MAX_LEN } }; static void ng_init_port(struct rte_mempool *mbuf_pool) { uint16_t nb_sys_ports= rte_eth_dev_count_avail(); // if (nb_sys_ports == 0) { rte_exit(EXIT_FAILURE, "No Supported eth found\n"); } struct rte_eth_dev_info dev_info; rte_eth_dev_info_get(gDpdkPortId, &dev_info); // const int num_rx_queues = 1; const int num_tx_queues = 1; struct rte_eth_conf port_conf = port_conf_default; rte_eth_dev_configure(gDpdkPortId, num_rx_queues, num_tx_queues, &port_conf); if (rte_eth_rx_queue_setup(gDpdkPortId, 0 , 1024, rte_eth_dev_socket_id(gDpdkPortId),NULL, mbuf_pool) < 0) { rte_exit(EXIT_FAILURE, "Could not setup RX queue\n"); } #if ENABLE_SEND struct rte_eth_txconf txq_conf = dev_info.default_txconf; txq_conf.offloads = port_conf.rxmode.offloads; if (rte_eth_tx_queue_setup(gDpdkPortId, 0 , 1024, rte_eth_dev_socket_id(gDpdkPortId), &txq_conf) < 0) { rte_exit(EXIT_FAILURE, "Could not setup TX queue\n"); } #endif if (rte_eth_dev_start(gDpdkPortId) < 0 ) { rte_exit(EXIT_FAILURE, "Could not start\n"); } } static int ng_encode_udp_pkt(uint8_t *msg, unsigned char *data, uint16_t total_len) { // encode // 1 ethhdr struct rte_ether_hdr *eth = (struct rte_ether_hdr *)msg; rte_memcpy(eth->s_addr.addr_bytes, gSrcMac, RTE_ETHER_ADDR_LEN); rte_memcpy(eth->d_addr.addr_bytes, gDstMac, RTE_ETHER_ADDR_LEN); eth->ether_type = htons(RTE_ETHER_TYPE_IPV4); // 2 iphdr struct rte_ipv4_hdr *ip = (struct rte_ipv4_hdr *)(msg + sizeof(struct rte_ether_hdr)); ip->version_ihl = 0x45; ip->type_of_service = 0; ip->total_length = htons(total_len - sizeof(struct rte_ether_hdr)); ip->packet_id = 0; ip->fragment_offset = 0; ip->time_to_live = 64; // ttl = 64 ip->next_proto_id = IPPROTO_UDP; ip->src_addr = gSrcIp; ip->dst_addr = gDstIp; ip->hdr_checksum = 0; ip->hdr_checksum = rte_ipv4_cksum(ip); // 3 udphdr struct rte_udp_hdr *udp = (struct rte_udp_hdr *)(msg + sizeof(struct rte_ether_hdr) + sizeof(struct rte_ipv4_hdr)); udp->src_port = gSrcPort; udp->dst_port = gDstPort; uint16_t udplen = total_len - sizeof(struct rte_ether_hdr) - sizeof(struct rte_ipv4_hdr); udp->dgram_len = htons(udplen); rte_memcpy((uint8_t*)(udp+1), data, udplen); udp->dgram_cksum = 0; udp->dgram_cksum = rte_ipv4_udptcp_cksum(ip, udp); struct in_addr addr; addr.s_addr = gSrcIp; printf(" --> src: %s:%d, ", inet_ntoa(addr), ntohs(gSrcPort)); addr.s_addr = gDstIp; printf("dst: %s:%d\n", inet_ntoa(addr), ntohs(gDstPort)); return 0; } static struct rte_mbuf * ng_send_udp(struct rte_mempool *mbuf_pool, uint8_t *data, uint16_t length) { // mempool --> mbuf const unsigned total_len = length + 42; struct rte_mbuf *mbuf = rte_pktmbuf_alloc(mbuf_pool); if (!mbuf) { rte_exit(EXIT_FAILURE, "rte_pktmbuf_alloc\n"); } mbuf->pkt_len = total_len; mbuf->data_len = total_len; uint8_t *pktdata = rte_pktmbuf_mtod(mbuf, uint8_t*); ng_encode_udp_pkt(pktdata, data, total_len); return mbuf; } #if ENABLE_ARP static int ng_encode_arp_pkt(uint8_t *msg, uint8_t *dst_mac, uint32_t sip, uint32_t dip) { // 1 ethhdr struct rte_ether_hdr *eth = (struct rte_ether_hdr *)msg; rte_memcpy(eth->s_addr.addr_bytes, gSrcMac, RTE_ETHER_ADDR_LEN); rte_memcpy(eth->d_addr.addr_bytes, dst_mac, RTE_ETHER_ADDR_LEN); eth->ether_type = htons(RTE_ETHER_TYPE_ARP); // 2 arp struct rte_arp_hdr *arp = (struct rte_arp_hdr *)(eth + 1); arp->arp_hardware = htons(1); arp->arp_protocol = htons(RTE_ETHER_TYPE_IPV4); arp->arp_hlen = RTE_ETHER_ADDR_LEN; arp->arp_plen = sizeof(uint32_t); arp->arp_opcode = htons(2); rte_memcpy(arp->arp_data.arp_sha.addr_bytes, gSrcMac, RTE_ETHER_ADDR_LEN); rte_memcpy( arp->arp_data.arp_tha.addr_bytes, dst_mac, RTE_ETHER_ADDR_LEN); arp->arp_data.arp_sip = sip; arp->arp_data.arp_tip = dip; return 0; } static struct rte_mbuf *ng_send_arp(struct rte_mempool *mbuf_pool, uint8_t *dst_mac, uint32_t sip, uint32_t dip) { const unsigned total_length = sizeof(struct rte_ether_hdr) + sizeof(struct rte_arp_hdr); struct rte_mbuf *mbuf = rte_pktmbuf_alloc(mbuf_pool); if (!mbuf) { rte_exit(EXIT_FAILURE, "rte_pktmbuf_alloc\n"); } mbuf->pkt_len = total_length; mbuf->data_len = total_length; uint8_t *pkt_data = rte_pktmbuf_mtod(mbuf, uint8_t *); ng_encode_arp_pkt(pkt_data, dst_mac, sip, dip); return mbuf; } #endif int main(int argc, char *argv[]) { if (rte_eal_init(argc, argv) < 0) { rte_exit(EXIT_FAILURE, "Error with EAL init\n"); } struct rte_mempool *mbuf_pool = rte_pktmbuf_pool_create("mbuf pool", NUM_MBUFS, 0, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); if (mbuf_pool == NULL) { rte_exit(EXIT_FAILURE, "Could not create mbuf pool\n"); } ng_init_port(mbuf_pool); rte_eth_macaddr_get(gDpdkPortId, (struct rte_ether_addr *)gSrcMac); while (1) { struct rte_mbuf *mbufs[BURST_SIZE]; unsigned num_recvd = rte_eth_rx_burst(gDpdkPortId, 0, mbufs, BURST_SIZE); if (num_recvd > BURST_SIZE) { rte_exit(EXIT_FAILURE, "Error receiving from eth\n"); } unsigned i = 0; for (i = 0;i < num_recvd;i ++) { struct rte_ether_hdr *ehdr = rte_pktmbuf_mtod(mbufs[i], struct rte_ether_hdr*); #if ENABLE_ARP if (ehdr->ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_ARP)) { struct rte_arp_hdr *ahdr = rte_pktmbuf_mtod_offset(mbufs[i], struct rte_arp_hdr *, sizeof(struct rte_ether_hdr)); struct in_addr addr; addr.s_addr = ahdr->arp_data.arp_tip; printf("arp ---> src: %s ", inet_ntoa(addr)); addr.s_addr = gLocalIp; printf(" local: %s \n", inet_ntoa(addr)); if (ahdr->arp_data.arp_tip == gLocalIp) { struct rte_mbuf *arpbuf = ng_send_arp(mbuf_pool, ahdr->arp_data.arp_sha.addr_bytes, ahdr->arp_data.arp_tip, ahdr->arp_data.arp_sip); rte_eth_tx_burst(gDpdkPortId, 0, &arpbuf, 1); rte_pktmbuf_free(arpbuf); rte_pktmbuf_free(mbufs[i]); } continue; } #endif if (ehdr->ether_type != rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4)) { continue; } struct rte_ipv4_hdr *iphdr = rte_pktmbuf_mtod_offset(mbufs[i], struct rte_ipv4_hdr *, sizeof(struct rte_ether_hdr)); if (iphdr->next_proto_id == IPPROTO_UDP) { struct rte_udp_hdr *udphdr = (struct rte_udp_hdr *)(iphdr + 1); #if ENABLE_SEND // rte_memcpy(gDstMac, ehdr->s_addr.addr_bytes, RTE_ETHER_ADDR_LEN); rte_memcpy(&gSrcIp, &iphdr->dst_addr, sizeof(uint32_t)); rte_memcpy(&gDstIp, &iphdr->src_addr, sizeof(uint32_t)); rte_memcpy(&gSrcPort, &udphdr->dst_port, sizeof(uint16_t)); rte_memcpy(&gDstPort, &udphdr->src_port, sizeof(uint16_t)); #endif uint16_t length = ntohs(udphdr->dgram_len); *((char*)udphdr + length) = '\0'; struct in_addr addr; addr.s_addr = iphdr->src_addr; printf("src: %s:%d, ", inet_ntoa(addr), ntohs(udphdr->src_port)); addr.s_addr = iphdr->dst_addr; printf("dst: %s:%d, %s\n", inet_ntoa(addr), ntohs(udphdr->dst_port), (char *)(udphdr+1)); #if ENABLE_SEND struct rte_mbuf *txbuf = ng_send_udp(mbuf_pool, (uint8_t *)(udphdr+1), length); rte_eth_tx_burst(gDpdkPortId, 0, &txbuf, 1); rte_pktmbuf_free(txbuf); #endif rte_pktmbuf_free(mbufs[i]); } } } }
