diff options
Diffstat (limited to 'extras/libmemif')
| -rw-r--r-- | extras/libmemif/examples/icmp_responder-epoll/main.c | 14 | ||||
| -rw-r--r-- | extras/libmemif/examples/icmp_responder-mt/main.c | 24 | ||||
| -rw-r--r-- | extras/libmemif/examples/icmp_responder-zero-copy-slave/main.c | 1279 | ||||
| -rw-r--r-- | extras/libmemif/examples/icmp_responder/icmp_proto.c | 186 | ||||
| -rw-r--r-- | extras/libmemif/examples/icmp_responder/icmp_proto.h | 16 | ||||
| -rw-r--r-- | extras/libmemif/examples/icmp_responder/main.c | 15 | ||||
| -rw-r--r-- | extras/libmemif/src/libmemif.h | 26 | ||||
| -rw-r--r-- | extras/libmemif/src/main.c | 201 | ||||
| -rw-r--r-- | extras/libmemif/src/memif_private.h | 1 | ||||
| -rw-r--r-- | extras/libmemif/src/socket.c | 6 |
10 files changed, 1696 insertions, 72 deletions
diff --git a/extras/libmemif/examples/icmp_responder-epoll/main.c b/extras/libmemif/examples/icmp_responder-epoll/main.c index 1dab51f4f23..fd354a38aaf 100644 --- a/extras/libmemif/examples/icmp_responder-epoll/main.c +++ b/extras/libmemif/examples/icmp_responder-epoll/main.c @@ -282,6 +282,7 @@ int on_connect (memif_conn_handle_t conn, void *private_ctx) { INFO ("memif connected!"); + memif_refill_queue (conn, 0, -1, 0); enable_log = 1; return 0; } @@ -384,6 +385,7 @@ on_interrupt (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) } i = 0; + memset (c->tx_bufs, 0, sizeof (memif_buffer_t) * rx); err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, rx, &tx, 128); if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING)) { @@ -404,7 +406,7 @@ on_interrupt (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) tx--; } - err = memif_refill_queue (c->conn, qid, rx); + err = memif_refill_queue (c->conn, qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); rx -= rx; @@ -426,7 +428,7 @@ on_interrupt (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) return 0; error: - err = memif_refill_queue (c->conn, qid, rx); + err = memif_refill_queue (c->conn, qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); c->rx_buf_num -= rx; @@ -512,7 +514,7 @@ on_interrupt0 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) } /* mark memif buffers and shared memory buffers as free */ /* free processed buffers */ - err = memif_refill_queue (c->conn, qid, j); + err = memif_refill_queue (c->conn, qid, j, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); rx -= j; @@ -538,7 +540,7 @@ on_interrupt0 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) return 0; error: - err = memif_refill_queue (c->conn, qid, rx); + err = memif_refill_queue (c->conn, qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); c->rx_buf_num -= rx; @@ -595,7 +597,7 @@ on_interrupt1 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) } } - err = memif_refill_queue (c->conn, qid, rx); + err = memif_refill_queue (c->conn, qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); c->rx_buf_num -= rx; @@ -607,7 +609,7 @@ on_interrupt1 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) return 0; error: - err = memif_refill_queue (c->conn, qid, rx); + err = memif_refill_queue (c->conn, qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); c->rx_buf_num -= rx; diff --git a/extras/libmemif/examples/icmp_responder-mt/main.c b/extras/libmemif/examples/icmp_responder-mt/main.c index 4f7733b8072..c4ac907cb53 100644 --- a/extras/libmemif/examples/icmp_responder-mt/main.c +++ b/extras/libmemif/examples/icmp_responder-mt/main.c @@ -299,10 +299,6 @@ memif_rx_poll (void *ptr) data->rx_buf_num += rx; if (rx == 0) { - /* if queue is in polling mode, it's not refilled */ - err = memif_refill_queue (c->conn, data->qid, -1); - if (err != MEMIF_ERR_SUCCESS) - INFO ("memif_buffer_free: %s", memif_strerror (err)); continue; } @@ -313,7 +309,7 @@ memif_rx_poll (void *ptr) err = memif_buffer_alloc (c->conn, data->qid, data->tx_bufs, - data->rx_buf_num, &tx, 128); + data->rx_buf_num, &tx, 0); if (err != MEMIF_ERR_SUCCESS) { INFO ("memif_buffer_alloc: %s", memif_strerror (err)); @@ -334,10 +330,10 @@ memif_rx_poll (void *ptr) } /* mark memif buffers and shared memory buffers as free */ - err = memif_refill_queue (c->conn, data->qid, -1); + err = memif_refill_queue (c->conn, data->qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); - data->rx_buf_num -= rx; + data->rx_buf_num -= fb; DBG ("freed %d buffers. %u/%u alloc/free buffers", fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num); @@ -359,10 +355,10 @@ error: goto close; close: - err = memif_refill_queue (c->conn, data->qid, -1); + err = memif_refill_queue (c->conn, data->qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); - data->rx_buf_num -= rx; + data->rx_buf_num -= fb; DBG ("freed %d buffers. %u/%u alloc/free buffers", fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num); free (data->rx_bufs); @@ -443,7 +439,7 @@ memif_rx_interrupt (void *ptr) err = memif_buffer_alloc (c->conn, data->qid, data->tx_bufs, - data->rx_buf_num, &tx, 128); + data->rx_buf_num, &tx, 0); if (err != MEMIF_ERR_SUCCESS) { INFO ("memif_buffer_alloc: %s", memif_strerror (err)); @@ -464,10 +460,10 @@ memif_rx_interrupt (void *ptr) } /* mark memif buffers and shared memory buffers as free */ - err = memif_refill_queue (c->conn, data->qid, rx); + err = memif_refill_queue (c->conn, data->qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); - data->rx_buf_num -= rx; + data->rx_buf_num -= fb; DBG ("freed %d buffers. %u/%u alloc/free buffers", fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num); @@ -490,10 +486,10 @@ error: goto close; close: - err = memif_refill_queue (c->conn, data->qid, rx); + err = memif_refill_queue (c->conn, data->qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); - data->rx_buf_num -= rx; + data->rx_buf_num -= fb; DBG ("freed %d buffers. %u/%u alloc/free buffers", fb, data->rx_buf_num, MAX_MEMIF_BUFS - data->rx_buf_num); free (data->rx_bufs); diff --git a/extras/libmemif/examples/icmp_responder-zero-copy-slave/main.c b/extras/libmemif/examples/icmp_responder-zero-copy-slave/main.c new file mode 100644 index 00000000000..47f3ce5b01d --- /dev/null +++ b/extras/libmemif/examples/icmp_responder-zero-copy-slave/main.c @@ -0,0 +1,1279 @@ +/* + *------------------------------------------------------------------ + * Copyright (c) 2017 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------ + */ + +#include <stdlib.h> +#include <stdint.h> +#include <net/if.h> +#include <sys/types.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <sys/un.h> +#include <sys/uio.h> +#include <sys/mman.h> +#include <sys/prctl.h> +#include <inttypes.h> +#include <string.h> +#include <stdio.h> +#include <netdb.h> +#include <linux/ip.h> +#include <linux/icmp.h> +#include <arpa/inet.h> +#include <stdlib.h> +#include <netinet/if_ether.h> +#include <net/if_arp.h> +#include <asm/byteorder.h> +#include <byteswap.h> +#include <string.h> +#include <sys/epoll.h> +#include <errno.h> +#include <unistd.h> +#include <signal.h> + +#include <time.h> + +#include <libmemif.h> +#include <icmp_proto.h> + +#define APP_NAME "ICMP_Responder" +#define IF_NAME "memif_connection" + +#define HEADROOM 0x80 /* 128b */ +#define ENCAP 0x60 + +#ifdef ICMP_DBG +#define DBG(...) do { \ + printf (APP_NAME":%s:%d: ", __func__, __LINE__); \ + printf (__VA_ARGS__); \ + printf ("\n"); \ + } while (0) +#define LOG(...) do { \ + if (enable_log) { \ + dprintf (out_fd, __VA_ARGS__); \ + dprintf (out_fd, "\n"); \ + } \ + } while (0) +#define LOG_FILE "/tmp/memif_time_test.txt" +#else +#define DBG(...) +#define LOG(...) +#endif + +#define INFO(...) do { \ + printf ("INFO: "__VA_ARGS__); \ + printf ("\n"); \ + } while (0) + + +/* maximum tx/rx memif buffers */ +#define MAX_MEMIF_BUFS 256 +#define MAX_CONNS 50 + +int epfd; +int out_fd; +uint8_t enable_log; + +typedef struct +{ + uint16_t index; + /* memif conenction handle */ + memif_conn_handle_t conn; + /* buffers */ + memif_buffer_t *bufs; + /* allocated tx buffers counter */ + /* number of tx buffers pointing to shared memory */ + uint16_t tx_buf_num; + /* allcoated rx buffers counter */ + /* number of rx buffers pointing to shared memory */ + uint16_t rx_buf_num; + /* interface ip address */ + uint8_t ip_addr[4]; + uint64_t tx_counter, rx_counter, tx_err_counter; + uint64_t t_sec, t_nsec; +} memif_connection_t; + +typedef struct +{ + uint16_t index; + icmpr_flow_mode_t mode; + uint64_t packet_count; + uint16_t sequence; + uint64_t tx; + uint8_t ip_daddr[4]; + uint8_t hw_daddr[6]; + struct timespec *start, end; +} icmpr_flow_t; + +memif_connection_t memif_connection[MAX_CONNS]; +long ctx[MAX_CONNS]; +icmpr_flow_t *flow; + +/* print details for all memif connections */ +static void +print_memif_details () +{ + memif_details_t md; + ssize_t buflen; + char *buf; + int err, i, e; + buflen = 2048; + buf = malloc (buflen); + printf ("MEMIF DETAILS\n"); + printf ("==============================\n"); + for (i = 0; i < MAX_CONNS; i++) + { + memif_connection_t *c = &memif_connection[i]; + + memset (&md, 0, sizeof (md)); + memset (buf, 0, buflen); + + err = memif_get_details (c->conn, &md, buf, buflen); + if (err != MEMIF_ERR_SUCCESS) + { + if (err != MEMIF_ERR_NOCONN) + INFO ("%s", memif_strerror (err)); + continue; + } + + printf ("interface index: %d\n", i); + + printf ("\tinterface ip: %u.%u.%u.%u\n", + c->ip_addr[0], c->ip_addr[1], c->ip_addr[2], c->ip_addr[3]); + printf ("\tinterface name: %s\n", (char *) md.if_name); + printf ("\tapp name: %s\n", (char *) md.inst_name); + printf ("\tremote interface name: %s\n", (char *) md.remote_if_name); + printf ("\tremote app name: %s\n", (char *) md.remote_inst_name); + printf ("\tid: %u\n", md.id); + printf ("\tsecret: %s\n", (char *) md.secret); + printf ("\trole: "); + if (md.role) + printf ("slave\n"); + else + printf ("master\n"); + printf ("\tmode: "); + switch (md.mode) + { + case 0: + printf ("ethernet\n"); + break; + case 1: + printf ("ip\n"); + break; + case 2: + printf ("punt/inject\n"); + break; + default: + printf ("unknown\n"); + break; + } + printf ("\tsocket filename: %s\n", (char *) md.socket_filename); + printf ("\trx queues:\n"); + for (e = 0; e < md.rx_queues_num; e++) + { + printf ("\t\tqueue id: %u\n", md.rx_queues[e].qid); + printf ("\t\tring size: %u\n", md.rx_queues[e].ring_size); + printf ("\t\tring rx mode: %s\n", + md.rx_queues[e].flags ? "polling" : "interrupt"); + printf ("\t\tring head: %u\n", md.rx_queues[e].head); + printf ("\t\tring tail: %u\n", md.rx_queues[e].tail); + printf ("\t\tbuffer size: %u\n", md.rx_queues[e].buffer_size); + } + printf ("\ttx queues:\n"); + for (e = 0; e < md.tx_queues_num; e++) + { + printf ("\t\tqueue id: %u\n", md.tx_queues[e].qid); + printf ("\t\tring size: %u\n", md.tx_queues[e].ring_size); + printf ("\t\tring rx mode: %s\n", + md.tx_queues[e].flags ? "polling" : "interrupt"); + printf ("\t\tring head: %u\n", md.tx_queues[e].head); + printf ("\t\tring tail: %u\n", md.tx_queues[e].tail); + printf ("\t\tbuffer size: %u\n", md.tx_queues[e].buffer_size); + } + printf ("\tlink: "); + if (md.link_up_down) + printf ("up\n"); + else + printf ("down\n"); + } + free (buf); +} + +int +add_epoll_fd (int fd, uint32_t events) +{ + if (fd < 0) + { + DBG ("invalid fd %d", fd); + return -1; + } + struct epoll_event evt; + memset (&evt, 0, sizeof (evt)); + evt.events = events; + evt.data.fd = fd; + if (epoll_ctl (epfd, EPOLL_CTL_ADD, fd, &evt) < 0) + { + DBG ("epoll_ctl: %s fd %d", strerror (errno), fd); + return -1; + } + DBG ("fd %d added to epoll", fd); + return 0; +} + +int +mod_epoll_fd (int fd, uint32_t events) +{ + if (fd < 0) + { + DBG ("invalid fd %d", fd); + return -1; + } + struct epoll_event evt; + memset (&evt, 0, sizeof (evt)); + evt.events = events; + evt.data.fd = fd; + if (epoll_ctl (epfd, EPOLL_CTL_MOD, fd, &evt) < 0) + { + DBG ("epoll_ctl: %s fd %d", strerror (errno), fd); + return -1; + } + DBG ("fd %d moddified on epoll", fd); + return 0; +} + +int +del_epoll_fd (int fd) +{ + if (fd < 0) + { + DBG ("invalid fd %d", fd); + return -1; + } + struct epoll_event evt; + memset (&evt, 0, sizeof (evt)); + if (epoll_ctl (epfd, EPOLL_CTL_DEL, fd, &evt) < 0) + { + DBG ("epoll_ctl: %s fd %d", strerror (errno), fd); + return -1; + } + DBG ("fd %d removed from epoll", fd); + return 0; +} + +/* informs user about connected status. private_ctx is used by user to identify connection + (multiple connections WIP) */ +int +on_connect (memif_conn_handle_t conn, void *private_ctx) +{ + INFO ("memif connected!"); + memif_refill_queue (conn, 0, -1, HEADROOM); + enable_log = 1; + return 0; +} + +/* informs user about disconnected status. private_ctx is used by user to identify connection + (multiple connections WIP) */ +int +on_disconnect (memif_conn_handle_t conn, void *private_ctx) +{ + INFO ("memif disconnected!"); + return 0; +} + +/* user needs to watch new fd or stop watching fd that is about to be closed. + control fd will be modified during connection establishment to minimize CPU usage */ +int +control_fd_update (int fd, uint8_t events) +{ + /* convert memif event definitions to epoll events */ + if (events & MEMIF_FD_EVENT_DEL) + return del_epoll_fd (fd); + + uint32_t evt = 0; + if (events & MEMIF_FD_EVENT_READ) + evt |= EPOLLIN; + if (events & MEMIF_FD_EVENT_WRITE) + evt |= EPOLLOUT; + + if (events & MEMIF_FD_EVENT_MOD) + return mod_epoll_fd (fd, evt); + + return add_epoll_fd (fd, evt); +} + +/* called when event is polled on interrupt file descriptor. + there are packets in shared memory ready to be received */ +/* handle packet processing in rx buffer then enqueue this buffer to tx and transmit */ +int +on_interrupt (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) +{ + long index = *((long *) private_ctx); + memif_connection_t *c = &memif_connection[index]; + if (c->index != index) + { + INFO ("invalid context: %ld/%u", index, c->index); + return 0; + } + + int err = MEMIF_ERR_SUCCESS, ret_val; + uint16_t rx = 0, tx = 0; + uint16_t fb = 0; + int i = 0; /* rx buffer iterator */ + int j = 0; /* tx bufferiterator */ + + /* loop while there are packets in shm */ + do + { + /* receive data from shared memory buffers (dequeue rx buffers) */ + err = memif_rx_burst (c->conn, qid, c->bufs, MAX_MEMIF_BUFS, &rx); + ret_val = err; + c->rx_counter += rx; + c->rx_buf_num += rx; + if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF)) + { + INFO ("memif_rx_burst: %s", memif_strerror (err)); + goto error; + } + + /* process bufers in place */ + for (i = 0; i < rx; i++) + { + resolve_packet2 ((void *) (c->bufs + i)->data, + &(c->bufs + i)->len, c->ip_addr); + } + + /* enque processed buffers to tx ring */ + err = memif_buffer_enq_tx (c->conn, qid, c->bufs, i, &tx); + if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING)) + { + INFO ("memif_buffer_alloc: %s", memif_strerror (err)); + goto error; + } + c->rx_buf_num -= tx; + c->tx_buf_num += tx; + c->tx_err_counter += i - tx; + + /* mark memif buffers and shared memory buffers as free */ + err = memif_refill_queue (c->conn, qid, rx, HEADROOM); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_buffer_free: %s", memif_strerror (err)); + c->rx_buf_num -= rx; + + DBG ("freed %d buffers. %u/%u alloc/free buffers", + fb, rx, MAX_MEMIF_BUFS - rx); + + /* transmit allocated buffers */ + err = memif_tx_burst (c->conn, qid, c->bufs, rx, &tx); + if (err != MEMIF_ERR_SUCCESS) + { + INFO ("memif_tx_burst: %s", memif_strerror (err)); + goto error; + } + c->tx_counter += tx; + + } + while (ret_val == MEMIF_ERR_NOBUF); + + return 0; + +error: + err = memif_refill_queue (c->conn, qid, -1, HEADROOM); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_buffer_free: %s", memif_strerror (err)); + c->rx_buf_num = 0; + DBG ("freed %d buffers. %u/%u alloc/free buffers", + fb, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num); + return 0; +} + +/* add ethernet encap to packet in rx buffer then enqueue this buffer to tx and tranmit */ +int +on_interrupt0 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) +{ + long index = *((long *) private_ctx); + memif_connection_t *c = &memif_connection[index]; + if (c->index != index) + { + INFO ("invalid context: %ld/%u", index, c->index); + return 0; + } + + int err = MEMIF_ERR_SUCCESS, ret_val; + uint16_t rx = 0, tx = 0; + uint16_t fb = 0; + int i = 0; /* rx buffer iterator */ + int j = 0; /* tx bufferiterator */ + + /* loop while there are packets in shm */ + do + { + /* receive data from shared memory buffers (dequeue rx buffers) */ + err = memif_rx_burst (c->conn, qid, c->bufs, MAX_MEMIF_BUFS, &rx); + ret_val = err; + c->rx_counter += rx; + c->rx_buf_num += rx; + if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF)) + { + INFO ("memif_rx_burst: %s", memif_strerror (err)); + goto error; + } + + /* process bufers in place */ + for (i = 0; i < rx; i++) + { + resolve_packet3 (&c->bufs[i].data, &c->bufs[i].len, c->ip_addr); + } + /* enque processed buffers to tx ring */ + err = memif_buffer_enq_tx (c->conn, qid, c->bufs, rx, &tx); + if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING)) + { + INFO ("memif_buffer_alloc: %s", memif_strerror (err)); + goto error; + } + c->rx_buf_num -= tx; + c->tx_buf_num += tx; + c->tx_err_counter += i - tx; + + /* mark memif buffers and shared memory buffers as free */ + err = memif_refill_queue (c->conn, qid, rx, HEADROOM); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_buffer_free: %s", memif_strerror (err)); + c->rx_buf_num -= rx; + + DBG ("freed %d buffers. %u/%u alloc/free buffers", + fb, rx, MAX_MEMIF_BUFS - rx); + + /* transmit allocated buffers */ + err = memif_tx_burst (c->conn, qid, c->bufs, i, &tx); + if (err != MEMIF_ERR_SUCCESS) + { + INFO ("memif_tx_burst: %s", memif_strerror (err)); + goto error; + } + c->tx_counter += tx; + + } + while (ret_val == MEMIF_ERR_NOBUF); + + return 0; + +error: + err = memif_refill_queue (c->conn, qid, -1, HEADROOM); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_buffer_free: %s", memif_strerror (err)); + c->rx_buf_num = 0; + DBG ("freed %d buffers. %u/%u alloc/free buffers", + fb, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num); + return 0; +} + +/* called when event is polled on interrupt file descriptor. + there are packets in shared memory ready to be received */ +/* dev test modification: handle only ARP requests */ +int +on_interrupt1 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) +{ + long index = *((long *) private_ctx); + memif_connection_t *c = &memif_connection[index]; + if (c->index != index) + { + INFO ("invalid context: %ld/%u", index, c->index); + return 0; + } + + int err = MEMIF_ERR_SUCCESS, ret_val; + int i; + uint16_t rx, tx; + uint16_t fb; + uint16_t pck_seq; + + do + { + /* receive data from shared memory buffers */ + err = memif_rx_burst (c->conn, qid, c->bufs, MAX_MEMIF_BUFS, &rx); + ret_val = err; + c->rx_buf_num += rx; + c->rx_counter += rx; + if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF)) + { + INFO ("memif_rx_burst: %s", memif_strerror (err)); + goto error; + } + + for (i = 0; i < rx; i++) + { + if (((struct ether_header *) (c->bufs + i)->data)->ether_type == + 0x0608) + { + /* process data in place */ + resolve_packet2 ((void *) (c->bufs + i)->data, + &(c->bufs + i)->len, c->ip_addr); + /* enque buffer to tx ring */ + memif_buffer_enq_tx (c->conn, qid, c->bufs, 1, &tx); + c->rx_buf_num -= tx; + memif_tx_burst (c->conn, qid, c->bufs, 1, &tx); + } + } + + err = memif_refill_queue (c->conn, qid, -1, HEADROOM); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_buffer_free: %s", memif_strerror (err)); + c->rx_buf_num -= rx; + + } + while (ret_val == MEMIF_ERR_NOBUF); + + return 0; + +error: + err = memif_refill_queue (c->conn, qid, -1, HEADROOM); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_buffer_free: %s", memif_strerror (err)); + c->rx_buf_num = 0; + DBG ("freed %d buffers. %u/%u alloc/free buffers", + fb, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num); + return 0; +} + +int +icmpr_memif_create (long index, long mode, char *s) +{ + if (index >= MAX_CONNS) + { + INFO ("connection array overflow"); + return 0; + } + if (index < 0) + { + INFO ("don't even try..."); + return 0; + } + memif_connection_t *c = &memif_connection[index]; + + /* setting memif connection arguments */ + memif_conn_args_t args; + int fd = -1; + memset (&args, 0, sizeof (args)); + args.is_master = mode; + args.log2_ring_size = 11; + args.buffer_size = 2048; + args.num_s2m_rings = 1; + args.num_m2s_rings = 1; + strncpy ((char *) args.interface_name, IF_NAME, strlen (IF_NAME)); + args.mode = 0; + /* socket filename is not specified, because this app is supposed to + connect to VPP over memif. so default socket filename will be used */ + /* default socketfile = /run/vpp/memif.sock */ + + args.interface_id = index; + /* last argument for memif_create (void * private_ctx) is used by user + to identify connection. this context is returned with callbacks */ + int err; + /* default interrupt */ + if (s == NULL) + { + err = memif_create (&c->conn, + &args, on_connect, on_disconnect, on_interrupt, + &ctx[index]); + if (err != MEMIF_ERR_SUCCESS) + { + INFO ("memif_create: %s", memif_strerror (err)); + return 0; + } + } + else + { + if (strncmp (s, "0", 1) == 0) + { + err = memif_create (&c->conn, + &args, on_connect, on_disconnect, on_interrupt0, + &ctx[index]); + if (err != MEMIF_ERR_SUCCESS) + { + INFO ("memif_create: %s", memif_strerror (err)); + return 0; + } + } + else if (strncmp (s, "1", 1) == 0) + { + err = memif_create (&c->conn, + &args, on_connect, on_disconnect, on_interrupt1, + &ctx[index]); + if (err != MEMIF_ERR_SUCCESS) + { + INFO ("memif_create: %s", memif_strerror (err)); + return 0; + } + } + else + { + INFO ("Unknown interrupt descriptor"); + goto done; + } + } + + c->index = index; + /* alloc memif buffers */ + c->rx_buf_num = 0; + c->tx_buf_num = 0; + c->bufs = + (memif_buffer_t *) malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS); + + c->ip_addr[0] = 192; + c->ip_addr[1] = 168; + c->ip_addr[2] = c->index + 1; + c->ip_addr[3] = 2; + + c->tx_err_counter = c->tx_counter = c->rx_counter = 0; + +done: + return 0; +} + +int +icmpr_memif_delete (long index) +{ + if (index >= MAX_CONNS) + { + INFO ("connection array overflow"); + return 0; + } + if (index < 0) + { + INFO ("don't even try..."); + return 0; + } + memif_connection_t *c = &memif_connection[index]; + + if (c->bufs) + free (c->bufs); + c->bufs = NULL; + c->tx_buf_num = 0; + c->rx_buf_num = 0; + + int err; + /* disconenct then delete memif connection */ + err = memif_delete (&c->conn); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_delete: %s", memif_strerror (err)); + if (c->conn != NULL) + INFO ("memif delete fail"); + return 0; +} + +void +print_help () +{ + printf ("LIBMEMIF EXAMPLE APP: %s", APP_NAME); +#ifdef ICMP_DBG + printf (" (debug)"); +#endif + printf ("\n"); + printf ("==============================\n"); + printf ("libmemif version: %s", LIBMEMIF_VERSION); +#ifdef MEMIF_DBG + printf (" (debug)"); +#endif + printf ("\n"); + printf ("memif version: %d\n", memif_get_version ()); + printf ("commands:\n"); + printf ("\thelp - prints this help\n"); + printf ("\texit - exit app\n"); + printf + ("\tconn <index> <mode> [<interrupt-desc>] - create memif. index is also used as interface id, mode 0 = slave 1 = master, interrupt-desc none = default 0 = if ring is full wait 1 = handle only ARP requests\n"); + printf ("\tdel <index> - delete memif\n"); + printf ("\tshow - show connection details\n"); + printf ("\tip-set <index> <ip-addr> - set interface ip address\n"); + printf + ("\trx-mode <index> <qid> <polling|interrupt> - set queue rx mode\n"); + printf ("\tsh-count - print counters\n"); + printf ("\tcl-count - clear counters\n"); + printf + ("\tsend <index> <tx> <ip> <mac> - send icmp, ommit mac to transmit on ip layer\n"); +} + +int +icmpr_free () +{ + /* application cleanup */ + int err; + long i; + if (out_fd > 0) + close (out_fd); + out_fd = -1; + for (i = 0; i < MAX_CONNS; i++) + { + memif_connection_t *c = &memif_connection[i]; + if (c->conn) + icmpr_memif_delete (i); + } + + err = memif_cleanup (); + if (err != MEMIF_ERR_SUCCESS) + INFO ("memif_delete: %s", memif_strerror (err)); + + return 0; +} + +int +icmpr_set_ip (long index, char *ip) +{ + if (index >= MAX_CONNS) + { + INFO ("connection array overflow"); + return 0; + } + if (index < 0) + { + INFO ("don't even try..."); + return 0; + } + memif_connection_t *c = &memif_connection[index]; + if (c->conn == NULL) + { + INFO ("no connection at index %ld", index); + return 0; + } + + char *end; + char *ui; + uint8_t tmp[4]; + ui = strtok (ip, "."); + if (ui == NULL) + goto error; + tmp[0] = strtol (ui, &end, 10); + + ui = strtok (NULL, "."); + if (ui == NULL) + goto error; + tmp[1] = strtol (ui, &end, 10); + + ui = strtok (NULL, "."); + if (ui == NULL) + goto error; + tmp[2] = strtol (ui, &end, 10); + + ui = strtok (NULL, "."); + if (ui == NULL) + goto error; + tmp[3] = strtol (ui, &end, 10); + + c->ip_addr[0] = tmp[0]; + c->ip_addr[1] = tmp[1]; + c->ip_addr[2] = tmp[2]; + c->ip_addr[3] = tmp[3]; + + INFO ("memif %ld ip address set to %u.%u.%u.%u", + index, c->ip_addr[0], c->ip_addr[1], c->ip_addr[2], c->ip_addr[3]); + + return 0; + +error: + INFO ("invalid ip address"); + return 0; +} + +int +icmpr_set_rx_mode (long index, long qid, char *mode) +{ + if (index >= MAX_CONNS) + { + INFO ("connection array overflow"); + return 0; + } + if (index < 0) + { + INFO ("don't even try..."); + return 0; + } + memif_connection_t *c = &memif_connection[index]; + + if (c->conn == NULL) + { + INFO ("no connection at index %ld", index); + return 0; + } + + if (strncmp (mode, "interrupt", 9) == 0) + { + memif_set_rx_mode (c->conn, MEMIF_RX_MODE_INTERRUPT, qid); + } + + else if (strncmp (mode, "polling", 7) == 0) + { + memif_set_rx_mode (c->conn, MEMIF_RX_MODE_POLLING, qid); + } + else + INFO ("expected rx mode <interrupt|polling>"); + return 0; +} + +void +icmpr_print_counters () +{ + int i; + for (i = 0; i < MAX_CONNS; i++) + { + memif_connection_t *c = &memif_connection[i]; + if (c->conn == NULL) + continue; + printf ("===============================\n"); + printf ("interface index: %d\n", c->index); + printf ("\trx: %lu\n", c->rx_counter); + printf ("\ttx: %lu\n", c->tx_counter); + printf ("\ttx_err: %lu\n", c->tx_err_counter); + printf ("\tts: %lus %luns\n", c->t_sec, c->t_nsec); + } +} + +void +icmpr_reset_counters () +{ + int i; + for (i = 0; i < MAX_CONNS; i++) + { + memif_connection_t *c = &memif_connection[i]; + if (c->conn == NULL) + continue; + c->t_sec = c->t_nsec = c->tx_err_counter = c->tx_counter = + c->rx_counter = 0; + } +} + +void +icmpr_send_proc () +{ + memif_connection_t *c = &memif_connection[flow->index]; + if (c->conn == NULL) + { + INFO ("No connection at index %d. Stopping flow...\n", flow->index); + goto stop_flow; + } + uint16_t tx, i; + int err = MEMIF_ERR_SUCCESS; + + if (!flow->start) + { + flow->start = malloc (sizeof (struct timespec)); + memset (flow->start, 0, sizeof (struct timespec)); + timespec_get (flow->start, TIME_UTC); + } + + i = 0; + err = memif_buffer_alloc (c->conn, 0, c->bufs, + MAX_MEMIF_BUFS > + flow->packet_count ? flow->packet_count : + MAX_MEMIF_BUFS, &tx, 64); + if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING)) + { + INFO ("memif_buffer_alloc: %s Stopping flow...\n", + memif_strerror (err)); + goto stop_flow; + } + c->tx_buf_num += tx; + + while (tx) + { + generate_packet2 ((void *) c->bufs[i].data, + &c->bufs[i].len, c->ip_addr, + flow->ip_daddr, flow->hw_daddr, (flow->sequence)++, + flow->mode); + i++; + tx--; + } + err = memif_tx_burst (c->conn, 0, c->bufs, i, &tx); + if (err != MEMIF_ERR_SUCCESS) + { + INFO ("memif_tx_burst: %s Stopping flow...\n", memif_strerror (err)); + goto stop_flow; + } + c->tx_buf_num -= tx; + c->tx_counter += tx; + flow->tx += tx; + flow->packet_count -= tx; + + if (flow->packet_count == 0) + { + timespec_get (&flow->end, TIME_UTC); + INFO ("Flow finished!"); + INFO ("Flow length: %lu", flow->tx); + uint64_t t1 = flow->end.tv_sec - flow->start->tv_sec; + uint64_t t2; + if (flow->end.tv_nsec > flow->start->tv_nsec) + { + t2 = flow->end.tv_nsec - flow->start->tv_nsec; + } + else + { + t2 = flow->start->tv_nsec - flow->end.tv_nsec; + t1--; + } + c->t_sec = t1; + c->t_nsec = t2; + INFO ("Flow time: %lus %luns", t1, t2); + double tmp = t1; + tmp += t2 / 1e+9; + tmp = flow->tx / tmp; + INFO ("Average pps: %f", tmp); + INFO ("Stopping flow..."); + goto stop_flow; + } + + return; + +stop_flow: + if (flow) + { + if (flow->start) + free (flow->start); + free (flow); + } + flow = NULL; + return; +} + +int +icmpr_send (long index, long packet_num, char *input) +{ + if (flow) + { + printf ("only one flow allowed\n"); + return 0; + } + + memif_connection_t *c = &memif_connection[index]; + char *end; + char *ui; + uint8_t tmp[6]; + if (c->conn == NULL) + return -1; + + flow = malloc (sizeof (icmpr_flow_t)); + flow->index = index; + flow->packet_count = packet_num; + flow->sequence = 0; + flow->tx = 0; + flow->start = NULL; + memset (&flow->end, 0, sizeof (struct timespec)); + + INFO ("packet count: %lu", flow->packet_count); + printf ("%s\n", input); + + ui = strtok (input, "."); + if (ui == NULL) + goto error; + tmp[0] = strtol (ui, &end, 10); + + ui = strtok (NULL, "."); + if (ui == NULL) + goto error; + tmp[1] = strtol (ui, &end, 10); + + ui = strtok (NULL, "."); + if (ui == NULL) + goto error; + tmp[2] = strtol (ui, &end, 10); + + ui = strtok (NULL, "."); + if (ui == NULL) + goto error; + tmp[3] = strtol (ui, &end, 10); + + flow->ip_daddr[0] = tmp[0]; + flow->ip_daddr[1] = tmp[1]; + flow->ip_daddr[2] = tmp[2]; + flow->ip_daddr[3] = tmp[3]; + + ui = strtok (NULL, " "); + if (ui == NULL) + { + flow->mode = ICMPR_FLOW_MODE_IP; + return 0; + } + + ui = strtok (NULL, ":"); + if (ui == NULL) + goto error; + tmp[0] = strtol (ui, &end, 16); + ui = strtok (NULL, ":"); + if (ui == NULL) + goto error; + tmp[1] = strtol (ui, &end, 16); + ui = strtok (NULL, ":"); + if (ui == NULL) + goto error; + tmp[2] = strtol (ui, &end, 16); + ui = strtok (NULL, ":"); + if (ui == NULL) + goto error; + tmp[3] = strtol (ui, &end, 16); + ui = strtok (NULL, ":"); + if (ui == NULL) + goto error; + tmp[4] = strtol (ui, &end, 16); + ui = strtok (NULL, ":"); + if (ui == NULL) + goto error; + tmp[5] = strtol (ui, &end, 16); + + flow->hw_daddr[0] = tmp[0]; + flow->hw_daddr[1] = tmp[1]; + flow->hw_daddr[2] = tmp[2]; + flow->hw_daddr[3] = tmp[3]; + flow->hw_daddr[4] = tmp[4]; + flow->hw_daddr[5] = tmp[5]; + + flow->mode = ICMPR_FLOW_MODE_ETH; + + return 0; + +error: + INFO ("Invalid input\n"); + if (flow) + free (flow); + flow = NULL; + return 0; +} + +int +user_input_handler () +{ + int i; + char *in = (char *) malloc (256); + char *ui = fgets (in, 256, stdin); + char *end; + long a; + if (in[0] == '\n') + goto done; + ui = strtok (in, " "); + if (strncmp (ui, "exit", 4) == 0) + { + free (in); + icmpr_free (); + exit (EXIT_SUCCESS); + } + else if (strncmp (ui, "help", 4) == 0) + { + print_help (); + goto done; + } + else if (strncmp (ui, "conn", 4) == 0) + { + ui = strtok (NULL, " "); + if (ui != NULL) + a = strtol (ui, &end, 10); + else + { + INFO ("expected id"); + goto done; + } + ui = strtok (NULL, " "); + if (ui != NULL) + icmpr_memif_create (a, strtol (ui, &end, 10), strtok (NULL, " ")); + else + INFO ("expected mode <0|1>"); + goto done; + } + else if (strncmp (ui, "del", 3) == 0) + { + ui = strtok (NULL, " "); + if (ui != NULL) + icmpr_memif_delete (strtol (ui, &end, 10)); + else + INFO ("expected id"); + goto done; + } + else if (strncmp (ui, "show", 4) == 0) + { + print_memif_details (); + goto done; + } + else if (strncmp (ui, "ip-set", 6) == 0) + { + ui = strtok (NULL, " "); + if (ui != NULL) + icmpr_set_ip (strtol (ui, &end, 10), strtok (NULL, " ")); + else + INFO ("expected id"); + goto done; + } + else if (strncmp (ui, "rx-mode", 7) == 0) + { + ui = strtok (NULL, " "); + if (ui != NULL) + a = strtol (ui, &end, 10); + else + { + INFO ("expected id"); + goto done; + } + ui = strtok (NULL, " "); + if (ui != NULL) + icmpr_set_rx_mode (a, strtol (ui, &end, 10), strtok (NULL, " ")); + else + INFO ("expected qid"); + goto done; + } + else if (strncmp (ui, "sh-count", 8) == 0) + { + icmpr_print_counters (); + } + else if (strncmp (ui, "cl-count", 8) == 0) + { + icmpr_reset_counters (); + } + else if (strncmp (ui, "send", 4) == 0) + { + ui = strtok (NULL, " "); + if (ui != NULL) + a = strtol (ui, &end, 10); + else + { + INFO ("expected id"); + goto done; + } + ui = strtok (NULL, " "); + if (ui != NULL) + icmpr_send (a, strtol (ui, &end, 10), strtok (NULL, " ")); + else + INFO ("expected count"); + goto done; + } + else + { + INFO ("unknown command: %s", ui); + goto done; + } + + return 0; +done: + free (in); + return 0; +} + +int +poll_event (int timeout) +{ + struct epoll_event evt, *e; + int app_err = 0, memif_err = 0, en = 0; + int tmp, nfd; + uint32_t events = 0; + struct timespec start, end; + memset (&evt, 0, sizeof (evt)); + evt.events = EPOLLIN | EPOLLOUT; + sigset_t sigset; + sigemptyset (&sigset); + en = epoll_pwait (epfd, &evt, 1, timeout, &sigset); + /* id event polled */ + timespec_get (&start, TIME_UTC); + if (en < 0) + { + DBG ("epoll_pwait: %s", strerror (errno)); + return -1; + } + if (en > 0) + { + /* this app does not use any other file descriptors than stds and memif control fds */ + if (evt.data.fd > 2) + { + /* event of memif control fd */ + /* convert epolle events to memif events */ + if (evt.events & EPOLLIN) + events |= MEMIF_FD_EVENT_READ; + if (evt.events & EPOLLOUT) + events |= MEMIF_FD_EVENT_WRITE; + if (evt.events & EPOLLERR) + events |= MEMIF_FD_EVENT_ERROR; + memif_err = memif_control_fd_handler (evt.data.fd, events); + if (memif_err != MEMIF_ERR_SUCCESS) + INFO ("memif_control_fd_handler: %s", memif_strerror (memif_err)); + } + else if (evt.data.fd == 0) + { + app_err = user_input_handler (); + } + else + { + DBG ("unexpected event at memif_epfd. fd %d", evt.data.fd); + } + } + + timespec_get (&end, TIME_UTC); + LOG ("interrupt: %ld", end.tv_nsec - start.tv_nsec); + + if ((app_err < 0) || (memif_err < 0)) + { + if (app_err < 0) + DBG ("user input handler error"); + if (memif_err < 0) + DBG ("memif control fd handler error"); + return -1; + } + + return 0; +} + +int +main () +{ + epfd = epoll_create (1); + add_epoll_fd (0, EPOLLIN); + + flow = NULL; + +#ifdef LOG_FILE + remove (LOG_FILE); + enable_log = 0; + + out_fd = open (LOG_FILE, O_WRONLY | O_CREAT, S_IRWXO); + if (out_fd < 0) + INFO ("Error opening log file: %s", strerror (errno)); +#endif /* LOG_FILE */ + + /* initialize memory interface */ + int err, i; + /* if valid callback is passed as argument, fd event polling will be done by user + all file descriptors and events will be passed to user in this callback */ + /* if callback is set to NULL libmemif will handle fd event polling */ + err = memif_init (control_fd_update, APP_NAME, NULL, NULL); + if (err != MEMIF_ERR_SUCCESS) + { + INFO ("memif_init: %s", memif_strerror (err)); + icmpr_free (); + exit (-1); + } + + for (i = 0; i < MAX_CONNS; i++) + { + memif_connection[i].conn = NULL; + ctx[i] = i; + } + + print_help (); + + /* main loop */ + while (1) + { + if (poll_event (0) < 0) + { + DBG ("poll_event error!"); + } + if (flow) + { + icmpr_send_proc (); + } + } +} diff --git a/extras/libmemif/examples/icmp_responder/icmp_proto.c b/extras/libmemif/examples/icmp_responder/icmp_proto.c index b27abb6a231..e1d255aca27 100644 --- a/extras/libmemif/examples/icmp_responder/icmp_proto.c +++ b/extras/libmemif/examples/icmp_responder/icmp_proto.c @@ -37,6 +37,7 @@ #include <net/if_arp.h> #include <asm/byteorder.h> #include <byteswap.h> +#include <assert.h> #include <icmp_proto.h> @@ -337,3 +338,188 @@ generate_packet (void *pck, uint32_t * size, uint8_t saddr[4], return 0; } + +int +generate_packet2 (void *pck, uint32_t * size, uint8_t saddr[4], + uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq, + icmpr_flow_mode_t mode) +{ + struct ether_header *eh; + struct iphdr *ip; + struct icmphdr *icmp; + + *size = 0; + + if (mode == ICMPR_FLOW_MODE_ETH) + { + eh = (struct ether_header *) pck; + *size += generate_eth (eh, hw_daddr); + } + + ip = (struct iphdr *) (pck + *size); + *size += generate_ip (ip, saddr, daddr); + + icmp = (struct icmphdr *) (pck + *size); + *size += generate_icmp (icmp, seq); + + ((struct icmphdr *) (pck + *size - sizeof (struct icmphdr)))->checksum = + cksum (pck + *size - sizeof (struct icmphdr), sizeof (struct icmphdr)); + + ip->tot_len = __bswap_16 (*size - sizeof (struct ether_header)); + ip->check = 0; + ip->check = cksum (ip, sizeof (struct iphdr)); + + return 0; +} + +#define GET_HEADER(out,hdr,src,off) do { \ + out = (hdr*)(src + off); \ + off += sizeof (hdr); \ + } while (0) + +int +resolve_packet2 (void *pck, uint32_t * size, uint8_t ip_addr[4]) +{ + struct ether_header *eh; + struct ether_arp *eah; + struct iphdr *ip; + struct icmphdr *icmp; + uint32_t offset = 0; + + if (pck == NULL) + return 0; + + GET_HEADER (eh, struct ether_header, pck, offset); + + memcpy (eh->ether_dhost, eh->ether_shost, 6); + memcpy (eh->ether_shost, "aaaaaa", 6); + + if (eh->ether_type == 0x0608) + { + GET_HEADER (eah, struct ether_arp, pck, offset); + struct arphdr *arp = &eah->ea_hdr; + + arp->ar_hrd = __bswap_16 (ARPHRD_ETHER); + arp->ar_pro = __bswap_16 (0x0800); + + arp->ar_hln = 6; + arp->ar_pln = 4; + + arp->ar_op = __bswap_16 (ARPOP_REPLY); + + memcpy (eah->arp_tha, eah->arp_sha, 6); + memcpy (eah->arp_tpa, eah->arp_spa, 4); + + memcpy (eah->arp_sha, eh->ether_shost, 6); + memcpy (eah->arp_spa, ip_addr, 4); + } + + else if (eh->ether_type == 0x0008) + { + GET_HEADER (ip, struct iphdr, pck, offset); + + if (ip->protocol == 1) + { + ip->ihl = 5; + ip->version = 4; + ip->tos = 0; + ip->tot_len = 0x0000; + ip->id = 0; + ip->frag_off = 0; + ip->ttl = 0x40; + ip->protocol = 1; + ip->check = 0x0000; + ip->daddr = ip->saddr; + ((uint8_t *) & ip->saddr)[0] = ip_addr[0]; + ((uint8_t *) & ip->saddr)[1] = ip_addr[1]; + ((uint8_t *) & ip->saddr)[2] = ip_addr[2]; + ((uint8_t *) & ip->saddr)[3] = ip_addr[3]; + + GET_HEADER (icmp, struct icmphdr, pck, offset); + + icmp->type = 0x00; + icmp->code = 0; + icmp->checksum = cksum (icmp, sizeof (struct icmphdr)); + + /* rest is payload */ + offset = *size; + + ip->tot_len = __bswap_16 (offset - sizeof (struct ether_header)); + ip->check = cksum (ip, sizeof (struct iphdr)); + } + } + + assert (offset == *size && "unsupported protocol"); + return 0; +} + + +int +resolve_packet3 (void **pck_, uint32_t * size, uint8_t ip_addr[4]) +{ + struct ether_header *eh; + struct ether_arp *eah; + struct iphdr *ip; + struct icmphdr *icmp; + int32_t offset = 0; + uint16_t encap_size = sizeof (struct ether_header); + void *pck = *pck_; + + if (pck == NULL) + return 0; + + *pck_ -= encap_size; + offset -= encap_size; + + GET_HEADER (eh, struct ether_header, pck, offset); + + uint8_t hw_daddr[6]; + memset (hw_daddr, 0, sizeof (uint8_t) * 6); + + generate_eth (eh, hw_daddr); + + if (eh->ether_type == 0x0008) + { + GET_HEADER (ip, struct iphdr, pck, offset); + + if (ip->protocol == 1) + { + ip->ihl = 5; + ip->version = 4; + ip->tos = 0; + ip->tot_len = 0x0000; + ip->id = 0; + ip->frag_off = 0; + ip->ttl = 0x40; + ip->protocol = 1; + ip->check = 0x0000; + ip->daddr = ip->saddr; + ((uint8_t *) & ip->saddr)[0] = ip_addr[0]; + ((uint8_t *) & ip->saddr)[1] = ip_addr[1]; + ((uint8_t *) & ip->saddr)[2] = ip_addr[2]; + ((uint8_t *) & ip->saddr)[3] = ip_addr[3]; + + GET_HEADER (icmp, struct icmphdr, pck, offset); + + icmp->type = 0x00; + icmp->code = 0; + icmp->checksum = cksum (icmp, sizeof (struct icmphdr)); + + /* rest is payload */ + offset = *size; + + ip->tot_len = __bswap_16 (offset - sizeof (struct ether_header)); + ip->check = cksum (ip, sizeof (struct iphdr)); + } + } + + offset += encap_size; + + assert (offset != *size && + "new packet length must be increased by encap size"); + + /* overwrite packet size */ + *size = offset; + + return 0; +} diff --git a/extras/libmemif/examples/icmp_responder/icmp_proto.h b/extras/libmemif/examples/icmp_responder/icmp_proto.h index ca72b2fe026..1575719bd6a 100644 --- a/extras/libmemif/examples/icmp_responder/icmp_proto.h +++ b/extras/libmemif/examples/icmp_responder/icmp_proto.h @@ -18,12 +18,28 @@ #ifndef _ICMP_PROTO_H_ #define _ICMP_PROTO_H_ +typedef enum +{ + ICMPR_FLOW_MODE_ETH = 0, + ICMPR_FLOW_MODE_IP, +} icmpr_flow_mode_t; + int resolve_packet (void *in_pck, ssize_t in_size, void *out_pck, uint32_t * out_size, uint8_t ip_addr[4]); +/* resolve packet in place */ +int resolve_packet2 (void *pck, uint32_t * size, uint8_t ip_addr[4]); + +/* resolve packet in place and add eth encap */ +int resolve_packet3 (void **pck, uint32_t * size, uint8_t ip_addr[4]); + int generate_packet (void *pck, uint32_t * size, uint8_t saddr[4], uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq); +int generate_packet2 (void *pck, uint32_t * size, uint8_t saddr[4], + uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq, + icmpr_flow_mode_t); + int print_packet (void *pck); #endif /* _ICMP_PROTO_H_ */ diff --git a/extras/libmemif/examples/icmp_responder/main.c b/extras/libmemif/examples/icmp_responder/main.c index b820ad3b12d..5e78acd3537 100644 --- a/extras/libmemif/examples/icmp_responder/main.c +++ b/extras/libmemif/examples/icmp_responder/main.c @@ -225,7 +225,7 @@ icmpr_buffer_alloc (long n, uint16_t qid) int err; uint16_t r; /* set data pointer to shared memory and set buffer_len to shared mmeory buffer len */ - err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, n, &r, 128); + err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, n, &r, 0); if (err != MEMIF_ERR_SUCCESS) { INFO ("memif_buffer_alloc: %s", memif_strerror (err)); @@ -311,24 +311,25 @@ on_interrupt (memif_conn_handle_t conn, void *private_ctx, uint16_t qid) &(c->tx_bufs + i)->len, c->ip_addr); } + uint16_t fb; /* mark memif buffers and shared memory buffers as free */ - err = memif_refill_queue (c->conn, qid, rx); - c->rx_buf_num -= rx; + err = memif_refill_queue (c->conn, qid, rx, 0); + c->rx_buf_num -= fb; DBG ("freed %d buffers. %u/%u alloc/free buffers", - rx, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num); + fb, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num); icmpr_tx_burst (c->tx_qid); return 0; error: - err = memif_refill_queue (c->conn, qid, rx); + err = memif_refill_queue (c->conn, qid, rx, 0); if (err != MEMIF_ERR_SUCCESS) INFO ("memif_buffer_free: %s", memif_strerror (err)); - c->rx_buf_num -= rx; + c->rx_buf_num -= fb; DBG ("freed %d buffers. %u/%u alloc/free buffers", - rx, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num); + fb, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num); return 0; } diff --git a/extras/libmemif/src/libmemif.h b/extras/libmemif/src/libmemif.h index e1f96f90c80..88b6a10f7b4 100644 --- a/extras/libmemif/src/libmemif.h +++ b/extras/libmemif/src/libmemif.h @@ -203,15 +203,20 @@ typedef enum /** \brief Memif buffer @param desc_index - ring descriptor index - @param len - buffer length + @param ring - pointer to ring containing descriptor for this buffer + @param len - available length @param flags - memif buffer flags @param data - pointer to shared memory data */ typedef struct { uint16_t desc_index; + void *ring; uint32_t len; +/** next buffer present (chained buffers) */ #define MEMIF_BUFFER_FLAG_NEXT (1 << 0) +/** states that buffer is from rx ring */ +#define MEMIF_BUFFER_FLAG_RX (1 << 1) uint8_t flags; void *data; } memif_buffer_t; @@ -423,6 +428,22 @@ int memif_control_fd_handler (int fd, uint8_t events); */ int memif_delete (memif_conn_handle_t * conn); +/** \brief Memif buffer enq tx + @param conn - memif conenction handle + @param qid - number indentifying queue + @param bufs - memif buffers + @param count - number of memif buffers to enque + @param count_out - returns number of allocated buffers + + Slave is producer of buffers. + If connection handle points to master returns MEMIF_ERR_INVAL_ARG. + + \return memif_err_t +*/ +int memif_buffer_enq_tx (memif_conn_handle_t conn, uint16_t qid, + memif_buffer_t * bufs, uint16_t count, + uint16_t * count_out); + /** \brief Memif buffer alloc @param conn - memif conenction handle @param qid - number indentifying queue @@ -441,11 +462,12 @@ int memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid, @param conn - memif conenction handle @param qid - number indentifying queue @param count - number of buffers to be placed on ring + @param headroom - offset the buffer by headroom \return memif_err_t */ int memif_refill_queue (memif_conn_handle_t conn, uint16_t qid, - uint16_t count); + uint16_t count, uint16_t headroom); /** \brief Memif transmit buffer burst @param conn - memif conenction handle diff --git a/extras/libmemif/src/main.c b/extras/libmemif/src/main.c index dc4a6231118..56458515485 100644 --- a/extras/libmemif/src/main.c +++ b/extras/libmemif/src/main.c @@ -144,7 +144,7 @@ const char *memif_errlist[ERRLIST_LEN] = { /* MEMIF_ERR_SUCCESS */ /* MEMIF_ERR_POLL_CANCEL */ "Memif event polling was canceled.", /* MEMIF_ERR_MAX_RING */ - "Maximum log2 ring size is 15.", + "Maximum log2 ring size is 15", /* MEMIF_ERR_PRIVHDR */ "Private headers not supported." }; @@ -1324,7 +1324,6 @@ int memif_init_regions_and_queues (memif_connection_t * conn) { memif_ring_t *ring = NULL; - uint64_t buffer_offset; memif_region_t *r; int i, j; libmemif_main_t *lm = &libmemif_main; @@ -1335,18 +1334,19 @@ memif_init_regions_and_queues (memif_connection_t * conn) return MEMIF_ERR_NOMEM; r = conn->regions; - buffer_offset = + r->buffer_offset = (conn->run_args.num_s2m_rings + conn->run_args.num_m2s_rings) * (sizeof (memif_ring_t) + sizeof (memif_desc_t) * (1 << conn->run_args.log2_ring_size)); - r->region_size = buffer_offset + + r->region_size = r->buffer_offset + conn->run_args.buffer_size * (1 << conn->run_args.log2_ring_size) * (conn->run_args.num_s2m_rings + conn->run_args.num_m2s_rings); if ((r->fd = memfd_create ("memif region 0", MFD_ALLOW_SEALING)) == -1) + if ((r->fd = memfd_create ("memif region 0", MFD_ALLOW_SEALING)) == -1) return memif_syscall_error_handler (errno); if ((fcntl (r->fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1) @@ -1370,7 +1370,7 @@ memif_init_regions_and_queues (memif_connection_t * conn) { uint16_t slot = i * (1 << conn->run_args.log2_ring_size) + j; ring->desc[j].region = 0; - ring->desc[j].offset = buffer_offset + + ring->desc[j].offset = r->buffer_offset + (uint32_t) (slot * conn->run_args.buffer_size); ring->desc[j].length = conn->run_args.buffer_size; } @@ -1389,7 +1389,7 @@ memif_init_regions_and_queues (memif_connection_t * conn) conn->run_args.num_s2m_rings) * (1 << conn->run_args.log2_ring_size) + j; ring->desc[j].region = 0; - ring->desc[j].offset = buffer_offset + + ring->desc[j].offset = r->buffer_offset + (uint32_t) (slot * conn->run_args.buffer_size); ring->desc[j].length = conn->run_args.buffer_size; } @@ -1417,7 +1417,6 @@ memif_init_regions_and_queues (memif_connection_t * conn) mq[x].offset = (void *) mq[x].ring - (void *) conn->regions[mq->region].shm; mq[x].last_head = 0; - mq[x].last_tail = 0; mq[x].alloc_bufs = 0; } conn->tx_queues = mq; @@ -1443,7 +1442,6 @@ memif_init_regions_and_queues (memif_connection_t * conn) mq[x].offset = (void *) mq[x].ring - (void *) conn->regions[mq->region].shm; mq[x].last_head = 0; - mq[x].last_tail = 0; mq[x].alloc_bufs = 0; } conn->rx_queues = mq; @@ -1452,6 +1450,87 @@ memif_init_regions_and_queues (memif_connection_t * conn) } int +memif_buffer_enq_tx (memif_conn_handle_t conn, uint16_t qid, + memif_buffer_t * bufs, uint16_t count, + uint16_t * count_out) +{ + memif_connection_t *c = (memif_connection_t *) conn; + if (EXPECT_FALSE (c == NULL)) + return MEMIF_ERR_NOCONN; + if (EXPECT_FALSE (c->fd < 0)) + return MEMIF_ERR_DISCONNECTED; + uint8_t num = + (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args. + num_s2m_rings; + if (EXPECT_FALSE (qid >= num)) + return MEMIF_ERR_QID; + if (EXPECT_FALSE (!count_out)) + return MEMIF_ERR_INVAL_ARG; + if (EXPECT_FALSE (c->args.is_master)) + return MEMIF_ERR_INVAL_ARG; + + memif_queue_t *mq = &c->tx_queues[qid]; + memif_ring_t *ring = mq->ring; + memif_buffer_t *b0; + uint16_t mask = (1 << mq->log2_ring_size) - 1; + uint16_t ring_size; + uint16_t slot, ns; + int i, err = MEMIF_ERR_SUCCESS; /* 0 */ + *count_out = 0; + + ring_size = (1 << mq->log2_ring_size); + ns = ring->tail - mq->last_tail; + mq->last_tail += ns; + slot = (c->args.is_master) ? ring->tail : ring->head; + slot += mq->alloc_bufs; + + /* can only be called by slave */ + ns = ring_size - ring->head + mq->alloc_bufs + mq->last_tail; + + b0 = bufs; + + while (count && ns) + { + if (EXPECT_FALSE ((b0->flags & MEMIF_BUFFER_FLAG_RX) == 0)) + { + /* not a valid buffer */ + count--; + continue; + } + b0->flags &= ~MEMIF_BUFFER_FLAG_RX; + + ((memif_ring_t *) b0->ring)->desc[b0->desc_index & mask].offset = ring->desc[slot & mask].offset; /* put free buffer on rx ring */ + + ring->desc[slot & mask].offset = + (uint32_t) (b0->data - c->regions->shm); + ring->desc[slot & mask].flags |= + (b0->flags & MEMIF_BUFFER_FLAG_NEXT) ? MEMIF_DESC_FLAG_NEXT : 0; + + b0->desc_index = slot; + + mq->alloc_bufs++; + slot++; + + count--; + ns--; + b0++; + *count_out += 1; + } + + DBG ("allocated: %u/%u bufs. Total %u allocated bufs", *count_out, count, + mq->alloc_bufs); + + if (count) + { + DBG ("ring buffer full! qid: %u", qid); + err = MEMIF_ERR_NOBUF_RING; + } + +error: + return err; +} + +int memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid, memif_buffer_t * bufs, uint16_t count, uint16_t * count_out, uint16_t size) @@ -1503,12 +1582,13 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid, ring->desc[slot & mask].flags = 0; /* slave can produce buffer with original length */ - dst_left = (c->args.is_master) ? ring->desc[slot & mask].length : c->run_args.buffer_size; /* - headroom */ + dst_left = (c->args.is_master) ? ring->desc[slot & mask].length : + c->run_args.buffer_size; src_left = size; while (src_left) { - if (dst_left == 0) + if (EXPECT_FALSE (dst_left == 0)) { if (count && ns) { @@ -1524,7 +1604,9 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid, b0 = (bufs + *count_out); b0->desc_index = slot; - dst_left = (c->args.is_master) ? ring->desc[slot & mask].length : c->run_args.buffer_size; /* - headroom */ + dst_left = + (c->args.is_master) ? ring->desc[slot & mask].length : c-> + run_args.buffer_size; ring->desc[slot & mask].flags = 0; } else @@ -1538,7 +1620,18 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid, } } b0->len = memif_min (dst_left, src_left); - b0->data = memif_get_buffer (c, ring, slot & mask); + + /* slave resets buffer offset */ + if (c->args.is_master == 0) + { + uint16_t x = + (ring->desc[slot & mask].offset - + c->regions->buffer_offset) / c->run_args.buffer_size; + ring->desc[slot & mask].offset = + c->regions->buffer_offset + (x * c->run_args.buffer_size); + } + + b0->data = c->regions->shm + ring->desc[slot & mask].offset; src_left -= b0->len; dst_left -= b0->len; @@ -1562,11 +1655,13 @@ no_ns: err = MEMIF_ERR_NOBUF_RING; } +error: return err; } int -memif_refill_queue (memif_conn_handle_t conn, uint16_t qid, uint16_t count) +memif_refill_queue (memif_conn_handle_t conn, uint16_t qid, uint16_t count, + uint16_t headroom) { memif_connection_t *c = (memif_connection_t *) conn; if (EXPECT_FALSE (c == NULL)) @@ -1581,6 +1676,8 @@ memif_refill_queue (memif_conn_handle_t conn, uint16_t qid, uint16_t count) libmemif_main_t *lm = &libmemif_main; memif_queue_t *mq = &c->rx_queues[qid]; memif_ring_t *ring = mq->ring; + uint16_t mask = (1 << mq->log2_ring_size) - 1; + uint16_t slot; if (c->args.is_master) { @@ -1588,16 +1685,32 @@ memif_refill_queue (memif_conn_handle_t conn, uint16_t qid, uint16_t count) ring->tail = (ring->tail + count <= mq->last_head) ? ring->tail + count : mq->last_head; + return MEMIF_ERR_SUCCESS; } - else + + uint16_t head = ring->head; + uint16_t ns = (1 << mq->log2_ring_size) - head + mq->last_tail; + head += (count < ns) ? count : ns; + + if (headroom) { - uint16_t head = ring->head; - uint16_t ns = (1 << mq->log2_ring_size) - head + mq->last_tail; - head += ns; - MEMIF_MEMORY_BARRIER (); - ring->head = (ring->head + count <= head) ? ring->head + count : head; + slot = (c->args.is_master) ? ring->head : ring->tail; + while (slot < head) + { + uint16_t x = + (ring->desc[slot & mask].offset - + c->regions->buffer_offset) / c->run_args.buffer_size; + ring->desc[slot & mask].offset = + c->regions->buffer_offset + (x * c->run_args.buffer_size) + + headroom; + + slot++; + } } + MEMIF_MEMORY_BARRIER (); + ring->head = head; + return MEMIF_ERR_SUCCESS; /* 0 */ } @@ -1620,32 +1733,40 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid, memif_queue_t *mq = &c->tx_queues[qid]; memif_ring_t *ring = mq->ring; - uint16_t slot; - - slot = (c->args.is_master) ? ring->tail : ring->head; - *tx = (count <= mq->alloc_bufs) ? count : mq->alloc_bufs; - -#ifdef MEMIF_DBG_SHM - uint16_t curr_buf = 0; uint16_t mask = (1 << mq->log2_ring_size) - 1; memif_buffer_t *b0; - for (curr_buf = 0; curr_buf < count; curr_buf++) + *tx = 0; + + if (count > mq->alloc_bufs) + count = mq->alloc_bufs; + + if (EXPECT_FALSE (count == 0)) + return MEMIF_ERR_SUCCESS; + + while (count) { - b0 = (bufs + curr_buf); + b0 = (bufs + *tx); + ring->desc[b0->desc_index & mask].length = b0->len; + +#ifdef MEMIF_DBG_SHM + printf ("offset: %-6d\n", ring->desc[b0->desc_index & mask].offset); + printf ("data: %p\n", + memif_get_buffer (c, ring, b0->desc_index & mask)); + printf ("index: %u\n", b0->desc_index); print_bytes (memif_get_buffer (c, ring, b0->desc_index & mask), ring->desc[b0->desc_index & mask].length, DBG_TX_BUF); +#endif /* MEMIF_DBG_SHM */ + *tx += 1; + count--; } -#endif /* MEMIF_DBG_SHM */ + MEMIF_MEMORY_BARRIER (); if (c->args.is_master) - ring->tail = slot + *tx; + ring->tail = b0->desc_index + 1; else - ring->head = slot + *tx; - - /* zero out buffer fields so the client cant modify transmitted data */ - memset (bufs, 0, sizeof (memif_buffer_t) * *tx); + ring->head = b0->desc_index + 1; mq->alloc_bufs -= *tx; @@ -1687,7 +1808,7 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid, uint64_t b; ssize_t r = read (mq->int_fd, &b, sizeof (b)); - if ((r == -1) && (errno != EAGAIN)) + if (EXPECT_FALSE ((r == -1) && (errno != EAGAIN))) return memif_syscall_error_handler (errno); cur_slot = (c->args.is_master) ? mq->last_head : mq->last_tail; @@ -1709,13 +1830,19 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid, { ring->desc[cur_slot & mask].length = c->run_args.buffer_size; } + + b0->flags = MEMIF_BUFFER_FLAG_RX; if (ring->desc[cur_slot & mask].flags & MEMIF_DESC_FLAG_NEXT) { - b0->flags = MEMIF_BUFFER_FLAG_NEXT; + b0->flags |= MEMIF_BUFFER_FLAG_NEXT; ring->desc[cur_slot & mask].flags &= ~MEMIF_DESC_FLAG_NEXT; } - +/* b0->offset = ring->desc[cur_slot & mask].offset;*/ + b0->ring = ring; #ifdef MEMIF_DBG_SHM + printf ("data: %p\n", b0->data); + printf ("index: %u\n", b0->desc_index); + printf ("ring: %p\n", b0->ring); print_bytes (b0->data, b0->len, DBG_RX_BUF); #endif /* MEMIF_DBG_SHM */ ns--; diff --git a/extras/libmemif/src/memif_private.h b/extras/libmemif/src/memif_private.h index accdac361b9..5ea5494decb 100644 --- a/extras/libmemif/src/memif_private.h +++ b/extras/libmemif/src/memif_private.h @@ -69,6 +69,7 @@ typedef struct { void *shm; uint32_t region_size; + uint32_t buffer_offset; int fd; } memif_region_t; diff --git a/extras/libmemif/src/socket.c b/extras/libmemif/src/socket.c index a471e0ba943..e568079ab25 100644 --- a/extras/libmemif/src/socket.c +++ b/extras/libmemif/src/socket.c @@ -590,9 +590,6 @@ memif_msg_receive_connect (memif_connection_t * c, memif_msg_t * msg) add_list_elt (&elt, &lm->interrupt_list, &lm->interrupt_list_len); lm->control_fd_update (c->rx_queues[i].int_fd, MEMIF_FD_EVENT_READ); - - /* refill ring buffers */ - memif_refill_queue ((void *) c, i, -1); } } @@ -623,9 +620,6 @@ memif_msg_receive_connected (memif_connection_t * c, memif_msg_t * msg) for (i = 0; i < c->run_args.num_s2m_rings; i++) { lm->control_fd_update (c->rx_queues[i].int_fd, MEMIF_FD_EVENT_READ); - - /* refill ring buffers */ - memif_refill_queue ((void *) c, i, -1); } } |