adamc@737: #define _GNU_SOURCE
adamc@737: 
adamc@116: #include <stdio.h>
adamc@116: #include <string.h>
adamc@502: #include <stdlib.h>
adamc@116: #include <sys/types.h>
adamc@116: #include <sys/socket.h>
adamc@116: #include <netinet/in.h>
adamc@472: #include <unistd.h>
adamc@502: #include <signal.h>
adamc@116: 
adamc@138: #include <pthread.h>
adamc@138: 
adamc@734: #include <mhash.h>
adamc@734: 
adamc@244: #include "urweb.h"
adamc@853: #include "request.h"
adamc@117: 
adamc@311: int uw_backlog = 10;
adamc@116: 
adamc@138: typedef struct node {
adamc@138:   int fd;
adamc@138:   struct node *next;
adamc@138: } *node;
adamc@138: 
adamc@138: static node front = NULL, back = NULL;
adamc@138: 
adamc@138: static int empty() {
adamc@138:   return front == NULL;
adamc@138: }
adamc@138: 
adamc@138: static void enqueue(int fd) {
adamc@138:   node n = malloc(sizeof(struct node));
adamc@138: 
adamc@138:   n->fd = fd;
adamc@138:   n->next = NULL;
adamc@138:   if (back)
adamc@138:     back->next = n;
adamc@138:   else
adamc@138:     front = n;
adamc@138:   back = n;
adamc@138: }
adamc@138: 
adamc@138: static int dequeue() {
adamc@138:   int ret = front->fd;
adamc@138: 
adamc@138:   front = front->next;
adamc@138:   if (!front)
adamc@138:     back = NULL;
adamc@138: 
adamc@138:   return ret;
adamc@138: }
adamc@138: 
adamc@138: static pthread_mutex_t queue_mutex = PTHREAD_MUTEX_INITIALIZER;
adamc@138: static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER;
adamc@138: 
adamc@853: static void *worker(void *data) {
adamc@853:   int me = *(int *)data;
adamc@853:   uw_context ctx = uw_request_new_context();
adamc@853:   size_t buf_size = 2;
adamc@853:   char *buf = malloc(buf_size);
adamc@853:   uw_request_context rc = uw_new_request_context();
adamc@698: 
adamc@272:   while (1) {
adamc@853:     char *back = buf;
adamc@853:     int sock;
adamc@116: 
adamc@138:     pthread_mutex_lock(&queue_mutex);
adamc@138:     while (empty())
adamc@138:       pthread_cond_wait(&queue_cond, &queue_mutex);
adamc@138:     sock = dequeue();
adamc@138:     pthread_mutex_unlock(&queue_mutex);
adamc@138: 
adamc@138:     printf("Handling connection with thread #%d.\n", me);
adamc@138: 
adamc@138:     while (1) {
adamc@737:       int r;
adamc@853:       char *s1, *s2;
adamc@737: 
adamc@742:       if (back - buf == buf_size - 1) {
adamc@737:         char *new_buf;
adamc@737:         buf_size *= 2;
adamc@737:         new_buf = realloc(buf, buf_size);
adamc@737:         back = new_buf + (back - buf);
adamc@737:         buf = new_buf;
adamc@737:       }
adamc@737: 
adamc@742:       r = recv(sock, back, buf_size - 1 - (back - buf), 0);
adamc@138: 
adamc@138:       if (r < 0) {
adamc@138:         fprintf(stderr, "Recv failed\n");
adamc@138:         break;
adamc@138:       }
adamc@138: 
adamc@138:       if (r == 0) {
adamc@138:         printf("Connection closed.\n");
adamc@138:         break;
adamc@138:       }
adamc@138: 
adamc@138:       back += r;
adamc@138:       *back = 0;
adamc@730: 
adamc@853:       if ((s1 = strstr(buf, "\r\n\r\n"))) {
adamc@853:         request_result rr;
adamc@138: 
adamc@853:         if ((s2 = strcasestr(buf, "\r\nContent-Length: ")) && s2 < s1) {
adamc@853:           int clen;
adamc@737: 
adamc@853:           if (sscanf(s2 + 18, "%d\r\n", &clen) != 1) {
adamc@853:             fprintf(stderr, "Malformed Content-Length header\n");
adamc@167:             break;
adamc@167:           }
adamc@167: 
adamc@853:           if (s1 + 4 + clen > back)
adamc@853:             continue;
adamc@167:         }
adamc@138: 
adamc@853:         rr = uw_request(rc, ctx, buf, back - buf, sock);
adamc@311:         uw_send(ctx, sock);
adamc@138: 
adamc@853:         if (rr == SERVED || rr == FAILED)
adamc@853:           close(sock);
adamc@853:         else if (rr != KEEP_OPEN)
adamc@853:           fprintf(stderr, "Illegal uw_request return code: %d\n", rr);
adamc@853: 
adamc@138:         break;
adamc@138:       }
adamc@116:     }
adamc@116: 
adamc@311:     uw_reset(ctx);
adamc@116:   }
adamc@116: }
adamc@102: 
adamc@477: static void help(char *cmd) {
adamc@477:   printf("Usage: %s [-p <port>] [-t <thread-count>]\n", cmd);
adamc@477: }
adamc@477: 
adamc@502: static void sigint(int signum) {
adamc@502:   printf("Exiting....\n");
adamc@502:   exit(0);
adamc@502: }
adamc@502: 
adamc@138: int main(int argc, char *argv[]) {
adamc@116:   // The skeleton for this function comes from Beej's sockets tutorial.
adamc@138:   int sockfd;  // listen on sock_fd
adamc@116:   struct sockaddr_in my_addr;
adamc@116:   struct sockaddr_in their_addr; // connector's address information
adamc@116:   int sin_size, yes = 1;
adamc@472:   int uw_port = 8080, nthreads = 1, i, *names, opt;
adamc@502:  
adamc@502:   signal(SIGINT, sigint);
adamc@505:   signal(SIGPIPE, SIG_IGN); 
adamc@505: 
adamc@477:   while ((opt = getopt(argc, argv, "hp:t:")) != -1) {
adamc@472:     switch (opt) {
adamc@472:     case '?':
adamc@472:       fprintf(stderr, "Unknown command-line option");
adamc@477:       help(argv[0]);
adamc@472:       return 1;
adamc@138: 
adamc@477:     case 'h':
adamc@477:       help(argv[0]);
adamc@477:       return 0;
adamc@477: 
adamc@472:     case 'p':
adamc@472:       uw_port = atoi(optarg);
adamc@472:       if (uw_port <= 0) {
adamc@472:         fprintf(stderr, "Invalid port number\n");
adamc@477:         help(argv[0]);
adamc@472:         return 1;
adamc@472:       }
adamc@472:       break;
adamc@472: 
adamc@472:     case 't':
adamc@472:       nthreads = atoi(optarg);
adamc@472:       if (nthreads <= 0) {
adamc@472:         fprintf(stderr, "Invalid thread count\n");
adamc@477:         help(argv[0]);
adamc@472:         return 1;
adamc@472:       }
adamc@472:       break;
adamc@472: 
adamc@472:     default:
adamc@472:       fprintf(stderr, "Unexpected getopt() behavior\n");
adamc@472:       return 1;
adamc@472:     }
adamc@138:   }
adamc@138: 
adamc@853:   uw_request_init();
adamc@687: 
adamc@138:   names = calloc(nthreads, sizeof(int));
adamc@116: 
adamc@116:   sockfd = socket(PF_INET, SOCK_STREAM, 0); // do some error checking!
adamc@116: 
adamc@116:   if (sockfd < 0) {
adamc@116:     fprintf(stderr, "Listener socket creation failed\n");
adamc@116:     return 1;
adamc@116:   }
adamc@116: 
adamc@116:   if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) < 0) {
adamc@116:     fprintf(stderr, "Listener socket option setting failed\n");
adamc@116:     return 1;
adamc@116:   }
adamc@116: 
adamc@116:   my_addr.sin_family = AF_INET;         // host byte order
adamc@311:   my_addr.sin_port = htons(uw_port);    // short, network byte order
adamc@116:   my_addr.sin_addr.s_addr = INADDR_ANY; // auto-fill with my IP
adamc@116:   memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);
adamc@116: 
adamc@116:   if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof my_addr) < 0) {
adamc@116:     fprintf(stderr, "Listener socket bind failed\n");
adamc@116:     return 1;
adamc@116:   }
adamc@116: 
adamc@311:   if (listen(sockfd, uw_backlog) < 0) {
adamc@116:     fprintf(stderr, "Socket listen failed\n");
adamc@116:     return 1;
adamc@116:   }
adamc@116: 
adamc@116:   sin_size = sizeof their_addr;
adamc@116: 
adamc@311:   printf("Listening on port %d....\n", uw_port);
adamc@116: 
adamc@667:   {
adamc@667:     pthread_t thread;
adamc@667:     int name;
adamc@667: 
adamc@667:     if (pthread_create(&thread, NULL, client_pruner, &name)) {
adamc@667:       fprintf(stderr, "Error creating pruner thread\n");
adamc@667:       return 1;
adamc@667:     }
adamc@667:   }
adamc@667: 
adamc@138:   for (i = 0; i < nthreads; ++i) {
adamc@138:     pthread_t thread;    
adamc@138:     names[i] = i;
adamc@138:     if (pthread_create(&thread, NULL, worker, &names[i])) {
adamc@138:       fprintf(stderr, "Error creating worker thread #%d\n", i);
adamc@138:       return 1;
adamc@138:     }
adamc@138:   }
adamc@138: 
adamc@116:   while (1) {
adamc@138:     int new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
adamc@116: 
adamc@116:     if (new_fd < 0) {
adamc@116:       fprintf(stderr, "Socket accept failed\n");
adamc@116:       return 1;
adamc@116:     }
adamc@116: 
adamc@116:     printf("Accepted connection.\n");
adamc@138: 
adamc@138:     pthread_mutex_lock(&queue_mutex);
adamc@138:     enqueue(new_fd);
adamc@139:     pthread_cond_broadcast(&queue_cond);
adamc@138:     pthread_mutex_unlock(&queue_mutex);
adamc@116:   }
adamc@102: }