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541 lines
15 KiB
C
541 lines
15 KiB
C
/* https://datatracker.ietf.org/doc/html/rfc6455 */
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#include <stdlib.h>
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <ctype.h>
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#include <getopt.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <event.h>
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#include <http_parser.h>
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struct host_info{
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char *host;
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short port;
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};
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enum worker_state {
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WS_INITIAL,
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WS_SENT_HANDSHAKE,
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WS_RECEIVED_HANDSHAKE,
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WS_SENT_FRAME,
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WS_COMPLETE
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};
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/* worker_thread, with counter of remaining messages */
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struct worker_thread {
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struct host_info *hi;
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struct event_base *base;
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int msg_target;
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int msg_received;
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int msg_sent;
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int byte_count;
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int id;
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pthread_t thread;
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enum worker_state state;
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int timeout_seconds;
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struct evbuffer *rbuffer;
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int got_header;
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struct evbuffer *wbuffer;
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int verbose;
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int fd;
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struct event ev_r;
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struct event ev_w;
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http_parser parser;
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http_parser_settings settings;
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int (*debug)(const char *fmt, ...);
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};
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int debug_noop(const char *fmt, ...) {
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(void)fmt;
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return 0;
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}
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int debug_verbose(const char *fmt, ...) {
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int ret;
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va_list vargs;
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va_start(vargs, fmt);
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ret = vfprintf(stderr, fmt, vargs);
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va_end(vargs);
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return ret;
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}
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void
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hex_dump(struct worker_thread *wt, char *p, size_t sz) {
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wt->debug("hex dump of %p (%ld bytes)\n", p, sz);
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for (char *cur = p; cur < p + sz; cur += 16) {
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char letters[16] = {0};
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int limit = (cur + 16) > p + sz ? (sz % 16) : 16;
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wt->debug("%08lx ", cur - p); /* address */
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for (int i = 0; i < limit; i++) {
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wt->debug("%02x ", (unsigned int)(cur[i] & 0xff));
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letters[i] = isprint(cur[i]) ? cur[i] : '.';
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}
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for (int i = limit; i < 16; i++) { /* pad on last line */
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wt->debug(" "); /* 3 spaces for "%02x " */
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}
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wt->debug(" %.*s\n", limit, letters);
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}
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}
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void
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evbuffer_debug_dump(struct worker_thread *wt, struct evbuffer *buffer) {
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size_t sz = evbuffer_get_length(buffer);
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char *data = malloc(sz);
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if (!data) {
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fprintf(stderr, "failed to allocate %ld bytes\n", sz);
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return;
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}
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evbuffer_remove(buffer, data, sz);
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hex_dump(wt, data, sz);
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evbuffer_prepend(buffer, data, sz);
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free(data);
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}
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static void
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wait_for_possible_read(struct worker_thread *wt);
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static void
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wait_for_possible_write(struct worker_thread *wt);
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static void
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ws_enqueue_frame(struct worker_thread *wt);
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void
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process_message(struct worker_thread *wt, size_t sz) {
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if (wt->msg_received && wt->msg_received % 1000 == 0) {
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printf("thread %d: %8d messages left (got %9d bytes so far).\n",
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wt->id,
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wt->msg_target - wt->msg_received, wt->byte_count);
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}
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wt->byte_count += sz;
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/* decrement read count, and stop receiving when we reach zero. */
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wt->msg_received++;
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if (wt->msg_received == wt->msg_target) {
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wt->debug("%s: thread %d has received all %d messages it expected\n",
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__func__, wt->id, wt->msg_received);
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event_base_loopexit(wt->base, NULL);
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}
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}
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/**
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* Called when we can write to the socket.
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*/
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void
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websocket_can_write(int fd, short event, void *ptr) {
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int ret;
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struct worker_thread *wt = ptr;
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wt->debug("%s (wt=%p, fd=%d)\n", __func__, wt, fd);
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switch (wt->state) {
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case WS_INITIAL: { /* still sending initial HTTP request */
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ret = evbuffer_write(wt->wbuffer, fd);
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wt->debug("evbuffer_write returned %d\n", ret);
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wt->debug("evbuffer_get_length returned %d\n", evbuffer_get_length(wt->wbuffer));
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if (evbuffer_get_length(wt->wbuffer) != 0) { /* not all written */
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wait_for_possible_write(wt);
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return;
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}
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/* otherwise, we've sent the full request, time to read the response */
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wt->state = WS_SENT_HANDSHAKE;
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wt->debug("state=WS_SENT_HANDSHAKE\n");
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wait_for_possible_read(wt);
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return;
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}
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case WS_RECEIVED_HANDSHAKE: { /* ready to send a frame */
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wt->debug("About to send data for WS frame, %lu in buffer\n", evbuffer_get_length(wt->wbuffer));
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evbuffer_write(wt->wbuffer, fd);
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size_t write_remains = evbuffer_get_length(wt->wbuffer);
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wt->debug("Sent data for WS frame, still %lu left to write\n", write_remains);
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if (write_remains == 0) { /* ready to read response */
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wt->state = WS_SENT_FRAME;
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wt->msg_sent++;
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wait_for_possible_read(wt);
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} else { /* not finished writing */
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wait_for_possible_write(wt);
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}
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return;
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}
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default:
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break;
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}
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}
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static void
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websocket_can_read(int fd, short event, void *ptr) {
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int ret;
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struct worker_thread *wt = ptr;
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wt->debug("%s (wt=%p)\n", __func__, wt);
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/* read message */
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ret = evbuffer_read(wt->rbuffer, fd, 65536);
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wt->debug("evbuffer_read() returned %d; wt->state=%d. wt->rbuffer:\n", ret, wt->state);
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evbuffer_debug_dump(wt, wt->rbuffer);
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if (ret == 0) {
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wt->debug("We didn't read anything from the socket...\n");
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event_base_loopexit(wt->base, NULL);
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return;
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}
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while (1) {
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switch (wt->state) {
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case WS_SENT_HANDSHAKE: { /* waiting for handshake response */
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size_t avail_sz = evbuffer_get_length(wt->rbuffer);
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char *tmp = calloc(avail_sz, 1);
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wt->debug("avail_sz from rbuffer = %lu\n", avail_sz);
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evbuffer_remove(wt->rbuffer, tmp, avail_sz); /* copy into `tmp` */
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wt->debug("Giving %lu bytes to http-parser\n", avail_sz);
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int nparsed = http_parser_execute(&wt->parser, &wt->settings, tmp, avail_sz);
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wt->debug("http-parser returned %d\n", nparsed);
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if (nparsed != (int)avail_sz) { // put back what we didn't read
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wt->debug("re-attach (prepend) %lu byte%c\n", avail_sz - nparsed,
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avail_sz - nparsed > 1 ? 's' : ' ');
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evbuffer_prepend(wt->rbuffer, tmp + nparsed, avail_sz - nparsed);
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}
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free(tmp);
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if (wt->state == WS_SENT_HANDSHAKE && /* haven't encountered end of response yet */
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wt->parser.upgrade && nparsed != (int)avail_sz) {
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wt->debug("UPGRADE *and* we have some data left\n");
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continue;
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} else if (wt->state == WS_RECEIVED_HANDSHAKE) { /* we have the full response */
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evbuffer_drain(wt->rbuffer, evbuffer_get_length(wt->rbuffer));
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}
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return;
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}
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case WS_SENT_FRAME: { /* waiting for frame response */
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wt->debug("We're in WS_SENT_FRAME, just read a frame response. wt->rbuffer:\n");
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evbuffer_debug_dump(wt, wt->rbuffer);
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uint8_t flag_opcodes, payload_len;
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if (evbuffer_get_length(wt->rbuffer) < 2) { /* not enough data */
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wait_for_possible_read(wt);
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return;
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}
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evbuffer_remove(wt->rbuffer, &flag_opcodes, 1); /* remove flags & opcode */
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evbuffer_remove(wt->rbuffer, &payload_len, 1); /* remove length */
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evbuffer_drain(wt->rbuffer, (size_t)payload_len); /* remove payload itself */
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process_message(wt, payload_len);
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if (evbuffer_get_length(wt->rbuffer) == 0) { /* consumed everything */
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if (wt->msg_received < wt->msg_target) { /* let's write again */
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wt->debug("our turn to write again\n");
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wt->state = WS_RECEIVED_HANDSHAKE;
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ws_enqueue_frame(wt);
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} /* otherwise, we're done */
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return;
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} else {
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wt->debug("there's still data to consume\n");
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continue;
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}
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return;
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}
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default:
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return;
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}
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}
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}
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static void
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wait_for_possible_read(struct worker_thread *wt) {
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wt->debug("%s (wt=%p)\n", __func__, wt);
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event_set(&wt->ev_r, wt->fd, EV_READ, websocket_can_read, wt);
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event_base_set(wt->base, &wt->ev_r);
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event_add(&wt->ev_r, NULL);
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}
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static void
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wait_for_possible_write(struct worker_thread *wt) {
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wt->debug("%s (wt=%p)\n", __func__, wt);
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event_set(&wt->ev_r, wt->fd, EV_WRITE, websocket_can_write, wt);
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event_base_set(wt->base, &wt->ev_r);
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event_add(&wt->ev_r, NULL);
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}
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static int
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ws_on_headers_complete(http_parser *p) {
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struct worker_thread *wt = p->data;
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wt->debug("%s (wt=%p)\n", __func__, wt);
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return 0;
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}
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static void
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ws_enqueue_frame_for_command(struct worker_thread *wt, char *cmd, size_t sz) {
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unsigned char mask[4];
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for (int i = 0; i < 4; i++) {
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mask[i] = rand() & 0xff;
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}
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uint8_t len = (uint8_t)(sz); /* (1 << 7) | length. */
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len |= (1 << 7); /* set masking bit ON */
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for (size_t i = 0; i < sz; i++) {
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cmd[i] = (cmd[i] ^ mask[i % 4]) & 0xff;
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}
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/* 0x81 = 10000001b: FIN bit (only one message in the frame), text frame */
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evbuffer_add(wt->wbuffer, "\x81", 1);
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evbuffer_add(wt->wbuffer, &len, 1);
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evbuffer_add(wt->wbuffer, mask, 4);
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evbuffer_add(wt->wbuffer, cmd, sz);
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}
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static void
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ws_enqueue_frame(struct worker_thread *wt) {
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char ping_command[] = "[\"PING\"]";
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ws_enqueue_frame_for_command(wt, ping_command, sizeof(ping_command) - 1);
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wait_for_possible_write(wt);
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}
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static int
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ws_on_message_complete(http_parser *p) {
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struct worker_thread *wt = p->data;
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wt->debug("%s (wt=%p)\n", __func__, wt);
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// we've received the full HTTP response now, so we're ready to send frames
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wt->state = WS_RECEIVED_HANDSHAKE;
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ws_enqueue_frame(wt); /* add frame to buffer and register interest in writing */
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return 0;
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}
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static void
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ws_on_timeout(evutil_socket_t fd, short event, void *arg) {
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struct worker_thread *wt = arg;
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(void)fd;
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(void)event;
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fprintf(stderr, "Time has run out! (thread %d)\n", wt->id);
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event_base_loopbreak(wt->base); /* break out of event loop */
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}
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void*
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worker_main(void *ptr) {
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char ws_template[] = "GET /.json HTTP/1.1\r\n"
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"Host: %s:%d\r\n"
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"Connection: Upgrade\r\n"
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"Upgrade: WebSocket\r\n"
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"Origin: http://%s:%d\r\n"
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"Sec-WebSocket-Key: webdis-websocket-test-key\r\n"
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"\r\n";
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struct worker_thread *wt = ptr;
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int ret;
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int fd;
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int int_one = 1;
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struct sockaddr_in addr;
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struct timeval timeout_tv;
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struct event *timeout_ev;
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/* connect socket */
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fd = socket(AF_INET, SOCK_STREAM, 0);
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addr.sin_family = AF_INET;
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addr.sin_port = htons(wt->hi->port);
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memset(&(addr.sin_addr), 0, sizeof(addr.sin_addr));
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addr.sin_addr.s_addr = inet_addr(wt->hi->host);
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ret = connect(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr));
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if (ret != 0) {
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fprintf(stderr, "connect: ret=%d: %s\n", ret, strerror(errno));
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return NULL;
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}
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ret = ioctl(fd, FIONBIO, &int_one);
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if (ret != 0) {
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fprintf(stderr, "ioctl: ret=%d: %s\n", ret, strerror(errno));
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return NULL;
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}
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/* initialize worker thread */
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wt->fd = fd;
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wt->base = event_base_new();
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wt->rbuffer = evbuffer_new();
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wt->wbuffer = evbuffer_new(); /* write buffer */
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wt->byte_count = 0;
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wt->got_header = 0;
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/* add timeout, if set */
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if (wt->timeout_seconds > 0) {
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timeout_tv.tv_sec = wt->timeout_seconds;
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timeout_tv.tv_usec = 0;
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timeout_ev = event_new(wt->base, -1, EV_TIMEOUT, ws_on_timeout, wt);
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event_add(timeout_ev, &timeout_tv);
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}
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/* initialize HTTP parser, to parse the server response */
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memset(&wt->settings, 0, sizeof(http_parser_settings));
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wt->settings.on_headers_complete = ws_on_headers_complete;
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wt->settings.on_message_complete = ws_on_message_complete;
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http_parser_init(&wt->parser, HTTP_RESPONSE);
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wt->parser.data = wt;
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/* add GET request to buffer */
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evbuffer_add_printf(wt->wbuffer, ws_template, wt->hi->host, wt->hi->port,
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wt->hi->host, wt->hi->port);
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wait_for_possible_write(wt); /* request callback */
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/* go! */
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event_base_dispatch(wt->base);
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wt->debug("event_base_dispatch returned\n");
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event_base_free(wt->base);
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return NULL;
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}
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void usage(const char *argv0, char *host_default, short port_default,
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int thread_count_default, int messages_default) {
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printf("Usage: %s [options]\n"
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"Options are:\n"
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"\t[--host|-h] HOST\t(default = \"%s\")\n"
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"\t[--port|-p] PORT\t(default = %d)\n"
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"\t[--clients|-c] THREADS\t(default = %d)\n"
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"\t[--messages|-n] COUNT\t(number of messages per thread, default = %d)\n"
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"\t[--max-time|-t] SECONDS\t(max time to give to the run, default = unlimited)\n"
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"\t[--verbose|-v]\t\t(extremely verbose output)\n",
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argv0, host_default, (int)port_default,
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thread_count_default, messages_default);
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}
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int
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main(int argc, char *argv[]) {
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struct timespec t0, t1;
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int messages_default = 2500;
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int thread_count_default = 4;
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short port_default = 7379;
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char *host_default = "127.0.0.1";
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int msg_target = messages_default;
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int thread_count = thread_count_default;
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int i, opt;
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char *colon;
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long total = 0, total_bytes = 0;
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int verbose = 0;
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int timeout_seconds = -1;
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struct host_info hi = {host_default, port_default};
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struct worker_thread *workers;
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/* getopt */
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struct option long_options[] = {
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{"help", no_argument, NULL, '?'},
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{"host", required_argument, NULL, 'h'},
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{"port", required_argument, NULL, 'p'},
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{"clients", required_argument, NULL, 'c'},
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{"messages", required_argument, NULL, 'n'},
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{"max-time", required_argument, NULL, 't'},
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{"verbose", no_argument, NULL, 'v'},
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{0, 0, 0, 0}};
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while ((opt = getopt_long(argc, argv, "h:p:c:n:t:vs", long_options, NULL)) != -1) {
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switch (opt) {
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case 'h':
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colon = strchr(optarg, ':');
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if (!colon) {
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size_t sz = strlen(optarg);
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hi.host = calloc(1 + sz, 1);
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strncpy(hi.host, optarg, sz);
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} else {
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hi.host = calloc(1 + colon - optarg, 1);
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strncpy(hi.host, optarg, colon - optarg);
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hi.port = (short)atol(colon + 1);
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}
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break;
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case 'p':
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hi.port = (short)atol(optarg);
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break;
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case 'c':
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thread_count = atoi(optarg);
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break;
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case 'n':
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msg_target = atoi(optarg);
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break;
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case 't':
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timeout_seconds = atoi(optarg);
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break;
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case 'v':
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verbose = 1;
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break;
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default: /* '?' */
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usage(argv[0], host_default, port_default,
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thread_count_default,
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messages_default);
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exit(EXIT_SUCCESS);
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}
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}
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/* run threads */
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workers = calloc(sizeof(struct worker_thread), thread_count);
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &t0);
|
|
for (i = 0; i < thread_count; ++i) {
|
|
workers[i].id = i;
|
|
workers[i].msg_target = msg_target;
|
|
workers[i].hi = &hi;
|
|
workers[i].verbose = verbose;
|
|
workers[i].state = WS_INITIAL;
|
|
workers[i].debug = verbose ? debug_verbose : debug_noop;
|
|
workers[i].timeout_seconds = timeout_seconds;
|
|
if (thread_count == 1) {
|
|
printf("Single-threaded mode\n");
|
|
worker_main(&workers[0]);
|
|
} else { /* create threads */
|
|
pthread_create(&workers[i].thread, NULL,
|
|
worker_main, &workers[i]);
|
|
}
|
|
}
|
|
|
|
/* wait for threads to finish */
|
|
for (i = 0; i < thread_count; ++i) {
|
|
if (thread_count > 1) {
|
|
pthread_join(workers[i].thread, NULL);
|
|
}
|
|
total += workers[i].msg_received;
|
|
total_bytes += workers[i].byte_count;
|
|
}
|
|
|
|
/* timing */
|
|
clock_gettime(CLOCK_MONOTONIC, &t1);
|
|
float mili0 = t0.tv_sec * 1000 + t0.tv_nsec / 1000000;
|
|
float mili1 = t1.tv_sec * 1000 + t1.tv_nsec / 1000000;
|
|
|
|
if (total != 0) {
|
|
double kb_per_sec = ((double)total_bytes / (double)(mili1 - mili0)) / 1.024;
|
|
printf("Read %ld messages (%ld bytes) in %0.2f sec: %0.2f msg/sec (%0.2f KB/sec)\n",
|
|
total,
|
|
total_bytes,
|
|
(mili1 - mili0) / 1000.0,
|
|
1000 * ((double)total) / (mili1 - mili0),
|
|
kb_per_sec);
|
|
return (total == thread_count * msg_target ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
} else {
|
|
printf("No message was read.\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
|