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annotate src/c/driver.c @ 132:25b28625d4df

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Proper topological sorting in untangle
author Adam Chlipala <adamc@hcoop.net>
date Thu, 17 Jul 2008 12:40:21 -0400
parents 94856a3b4752
children 133fa2d51bb4
rev   line source
adamc@116 1 #include <stdio.h>
adamc@116 2
adamc@116 3 #include <string.h>
adamc@116 4 #include <sys/types.h>
adamc@116 5 #include <sys/socket.h>
adamc@116 6 #include <netinet/in.h>
adamc@116 7
adamc@117 8 #include "lacweb.h"
adamc@117 9
adamc@116 10 int lw_port = 8080;
adamc@116 11 int lw_backlog = 10;
adamc@116 12 int lw_bufsize = 1024;
adamc@116 13
adamc@117 14 void lw_handle(lw_context, char*);
adamc@116 15
adamc@116 16 static void worker(int sock) {
adamc@116 17 char buf[lw_bufsize+1], *back = buf, *s;
adamc@116 18
adamc@116 19 while (1) {
adamc@116 20 int r = recv(sock, back, lw_bufsize - (back - buf), 0);
adamc@116 21
adamc@116 22 if (r < 0) {
adamc@116 23 fprintf(stderr, "Recv failed\n");
adamc@116 24 close(sock);
adamc@116 25 return;
adamc@116 26 }
adamc@116 27
adamc@116 28 if (r == 0) {
adamc@116 29 printf("Connection closed.\n");
adamc@116 30 close(sock);
adamc@116 31 return;
adamc@116 32 }
adamc@116 33
adamc@116 34 printf("Received %d bytes.\n", r);
adamc@116 35
adamc@116 36 back += r;
adamc@116 37 *back = 0;
adamc@116 38
adamc@116 39 if (s = strstr(buf, "\r\n\r\n")) {
adamc@116 40 char *cmd, *path;
adamc@117 41 lw_context ctx;
adamc@116 42
adamc@116 43 *s = 0;
adamc@116 44
adamc@117 45 if (!(s = strstr(buf, "\r\n"))) {
adamc@116 46 fprintf(stderr, "No newline in buf\n");
adamc@116 47 close(sock);
adamc@116 48 return;
adamc@116 49 }
adamc@116 50
adamc@116 51 *s = 0;
adamc@116 52 cmd = s = buf;
adamc@116 53
adamc@116 54 if (!strsep(&s, " ")) {
adamc@116 55 fprintf(stderr, "No first space in HTTP command\n");
adamc@116 56 close(sock);
adamc@116 57 return;
adamc@116 58 }
adamc@116 59
adamc@116 60 if (strcmp(cmd, "GET")) {
adamc@116 61 fprintf(stderr, "Not ready for non-get command: %s\n", cmd);
adamc@116 62 close(sock);
adamc@116 63 return;
adamc@116 64 }
adamc@116 65
adamc@116 66 path = s;
adamc@116 67 if (!strsep(&s, " ")) {
adamc@116 68 fprintf(stderr, "No second space in HTTP command\n");
adamc@116 69 close(sock);
adamc@116 70 return;
adamc@116 71 }
adamc@116 72
adamc@116 73 printf("Serving URI %s....\n", path);
adamc@117 74
adamc@117 75 ctx = lw_init(1024);
adamc@117 76 lw_write (ctx, "HTTP/1.1 200 OK\r\n");
adamc@117 77 lw_write(ctx, "Content-type: text/html\r\n\r\n");
adamc@117 78 lw_write(ctx, "<html>");
adamc@117 79 lw_handle(ctx, path);
adamc@117 80 lw_write(ctx, "</html>");
adamc@117 81
adamc@117 82 lw_send(ctx, sock);
adamc@116 83
adamc@116 84 printf("Done with client.\n\n");
adamc@116 85 close(sock);
adamc@116 86 return;
adamc@116 87 }
adamc@116 88 }
adamc@116 89 }
adamc@102 90
adamc@102 91 int main() {
adamc@116 92 // The skeleton for this function comes from Beej's sockets tutorial.
adamc@116 93 int sockfd, new_fd; // listen on sock_fd, new connection on new_fd
adamc@116 94 struct sockaddr_in my_addr;
adamc@116 95 struct sockaddr_in their_addr; // connector's address information
adamc@116 96 int sin_size, yes = 1;
adamc@116 97
adamc@116 98 sockfd = socket(PF_INET, SOCK_STREAM, 0); // do some error checking!
adamc@116 99
adamc@116 100 if (sockfd < 0) {
adamc@116 101 fprintf(stderr, "Listener socket creation failed\n");
adamc@116 102 return 1;
adamc@116 103 }
adamc@116 104
adamc@116 105 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) < 0) {
adamc@116 106 fprintf(stderr, "Listener socket option setting failed\n");
adamc@116 107 return 1;
adamc@116 108 }
adamc@116 109
adamc@116 110 my_addr.sin_family = AF_INET; // host byte order
adamc@116 111 my_addr.sin_port = htons(lw_port); // short, network byte order
adamc@116 112 my_addr.sin_addr.s_addr = INADDR_ANY; // auto-fill with my IP
adamc@116 113 memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);
adamc@116 114
adamc@116 115 if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof my_addr) < 0) {
adamc@116 116 fprintf(stderr, "Listener socket bind failed\n");
adamc@116 117 return 1;
adamc@116 118 }
adamc@116 119
adamc@116 120 if (listen(sockfd, lw_backlog) < 0) {
adamc@116 121 fprintf(stderr, "Socket listen failed\n");
adamc@116 122 return 1;
adamc@116 123 }
adamc@116 124
adamc@116 125 sin_size = sizeof their_addr;
adamc@116 126
adamc@116 127 printf("Listening on port %d....\n", lw_port);
adamc@116 128
adamc@116 129 while (1) {
adamc@116 130 new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
adamc@116 131
adamc@116 132 if (new_fd < 0) {
adamc@116 133 fprintf(stderr, "Socket accept failed\n");
adamc@116 134 return 1;
adamc@116 135 }
adamc@116 136
adamc@116 137 printf("Accepted connection.\n");
adamc@116 138 worker(new_fd);
adamc@116 139 }
adamc@102 140 }