X-Git-Url: https://gapil.gnulinux.it/gitweb/?p=gapil.git;a=blobdiff_plain;f=sources%2Fwwwd.c;fp=sources%2Fwwwd.c;h=3379486e08a431d0e8febd3f003632e369120537;hp=0000000000000000000000000000000000000000;hb=ff8c324d1cdb252eebc1ad3c419bca5b7ac940f3;hpb=66e83c068629844f84fe4a0d44b382f756c9ef32 diff --git a/sources/wwwd.c b/sources/wwwd.c new file mode 100644 index 0000000..3379486 --- /dev/null +++ b/sources/wwwd.c @@ -0,0 +1,326 @@ +/* wwwd.c + * + * Copyright (C) 2005 Simone Piccardi + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +/**************************************************************** + * + * Program wwwd + * Elementary WWW server (port 80) + * + * Author: Simone Piccardi + * Mar. 2005 + * + * Usage: wwwd -h give all info + * + * $Id$ + * + ****************************************************************/ +/* + * Include needed headers + */ +#define _GNU_SOURCE +#include /* error strings */ +#include /* predefined types */ +#include /* include unix standard library */ +#include /* IP addresses conversion utiliites */ +#include /* socket library */ +#include /* include standard I/O library */ +#include +#include /* syslog system functions */ +#include /* signal functions */ +#include /* error code */ +#include + +#include "Gapil.h" + +#define BACKLOG 10 +#define MAXLINE 256 +int demonize = 1; /* daemon use option: default is daemon */ +int debugging = 0; /* debug info printing option: default is no debug */ + +/* Subroutines declaration */ +void usage(void); +void ServPage(int sockfd); +void PrintErr(char * error); +void print_headers(FILE *file); + +/* Program beginning */ +int main(int argc, char *argv[]) +{ +/* + * Variables definition + */ + int list_fd, conn_fd; + int waiting = 0; + int compat = 0; + pid_t pid; + struct sockaddr_in cli_add; + socklen_t len; + char debug[MAXLINE], ipaddr[20]; + /* + * Input section: decode parameters passed in the calling + * Use getopt function + */ + int i; + opterr = 0; /* don't want writing to stderr */ + while ( (i = getopt(argc, argv, "hdicw:")) != -1) { + switch (i) { + /* + * Handling options + */ + case 'h': + printf("Wrong -h option use\n"); + usage(); + return(0); + break; + case 'i': + demonize = 0; + break; + case 'c': + compat = 1; + break; + case 'd': + debugging = 1; + break; + case 'w': + waiting = strtol(optarg, NULL, 10); + break; + case '?': /* unrecognized options */ + printf("Unrecognized options -%c\n",optopt); + usage(); + default: /* should not reached */ + usage(); + } + } + /* *********************************************************** + * + * Options processing completed + * + * Main code beginning + * + * ***********************************************************/ + /* Main code begin here */ + if (compat) { /* install signal handler */ + Signal(SIGCHLD, HandSigCHLD); /* non restarting handler */ + } else { + SignalRestart(SIGCHLD, HandSigCHLD); /* restarting handler */ + } + /* create and bind socket */ + if ( (list_fd = sockbind2(argv[optind], "www", 6, SOCK_STREAM)) < 0) { + return 1; + } + /* release privileges and go daemon */ + if (setgid(65534) !=0) { /* first give away group privileges */ + perror("cannot give away group privileges"); + exit(1); + } + if (setuid(65534) !=0) { /* and only after user ... */ + perror("cannot give away user privileges"); + exit(1); + } + if (demonize) { /* go daemon */ + openlog(argv[0], 0, LOG_DAEMON); /* open logging */ + if (daemon(0, 0) != 0) { + perror("cannot start as daemon"); + exit(1); + } + } + /* main body */ + if (listen(list_fd, BACKLOG) < 0 ) { + PrintErr("listen error"); + exit(1); + } + if (waiting) sleep(waiting); + /* handle echo to client */ + while (1) { + /* accept connection */ + len = sizeof(cli_add); + while (((conn_fd = accept(list_fd, (struct sockaddr *)&cli_add, &len)) + < 0) && (errno == EINTR)); + if (conn_fd < 0) { + PrintErr("accept error"); + exit(1); + } + if (debugging) { + inet_ntop(AF_INET, &cli_add.sin_addr, ipaddr, sizeof(ipaddr)); + snprintf(debug, MAXLINE, "Accepted connection form %s\n", ipaddr); + if (demonize) { + syslog(LOG_DEBUG, debug); + } else { + printf("%s", debug); + } + } + /* fork to handle connection */ + if ( (pid = fork()) < 0 ){ + PrintErr("fork error"); + exit(1); + } + if (pid == 0) { /* child */ + close(list_fd); /* close listening socket */ + ServPage(conn_fd); /* handle echo */ + if (debugging) { + snprintf(debug, MAXLINE, "Closed connection %s\n", ipaddr); + if (demonize) { + syslog(LOG_DEBUG, debug); + } else { + printf("%s", debug); + } + } + exit(0); + } else { /* parent */ + close(conn_fd); /* close connected socket */ + } + } + /* normal exit, never reached */ + exit(0); +} +/* + * routine to print usage info and exit + */ +void usage(void) +{ + printf("Elementary echo server\n"); + printf("Usage:\n"); + printf(" echod [-h] \n"); + printf(" -h print this help\n"); + printf(" -d write debug info\n"); + printf(" -i use interactively\n"); + printf(" -c disable BSD semantics\n"); + printf(" -w N wait N sec. before calling accept\n"); + exit(1); +} +/* + * routine to handle echo for connection + */ +void ServPage(int sockfd) +{ + char buffer[MAXLINE]; + char outbuf[1024]; + FILE *sock, *file; + char *line, *copy, *method, *ptr, *filename, *version; + char *methods[] = { "GET", "PUT", NULL }; + char *codes[] = { + "200 OK", + "404 Not Found", + NULL + }; + int nleft; + int i, j; + + sock = fdopen(sockfd, "w+"); + /* main loop, reading 0 char means client close connection */ + line = fgets(buffer, MAXLINE, sock); + copy = strndupa(line, MAXLINE); + + if (line == NULL) { + PrintErr("Errore in lettura"); + return; + } + if ((method = strtok_r(copy, " ", &ptr)) == NULL) { + PrintErr("Non ho trovato il metodo"); + return; + } + if ((filename = strtok_r(NULL, " ", &ptr)) == NULL) { + PrintErr("Non ho trovato il file"); + return; + } + if ((version = strtok_r(NULL, " ", &ptr)) == NULL) { + PrintErr("Non ho trovato la versione"); + return; + } + printf("metodo %s -- file %s -- versione %s\n", method, filename, version); + i = 0; + while ( (ptr = methods[i]) != NULL) { + if ( (strncmp(ptr, method, strlen(ptr)) == 0)) { + break; + } + i++; + } + if (i>=2) { + printf("No method %s found\n", method); + return; + } + + while (strcmp(line,"\r\n")) { + line = fgets(buffer, MAXLINE, sock); + printf("letto: %s\n", line); + } + + if ( (file = fopen(filename, "r")) == NULL) { + printf("file %s", filename); + perror("Error opening"); + fprintf(sock, "HTTP/1.0 %s\n", codes[1]); + print_headers(sock); + return; + } + fprintf(sock, "HTTP/1.0 %s\n", codes[0]); + //PrintHeader(sock); + print_headers(sock); + + j = 0; + while (!feof(file)) { + printf("Loop %d\n", j++); + if ( (nleft = full_fread(file, outbuf, 1024)) != 0) { + if (ferror(file)) { + printf("Errore in lettura"); + return; + } + } + printf("Loop %d rimasti %d\n", j, nleft); + if (full_fwrite(sock, outbuf, 1024-nleft) != 0) { + if (ferror(file)) { + printf("Errore in scrittura"); + return; + } + } + } + printf("Ok fin qui!"); +// line = fgets(buffer, MAXLINE, sock); + fclose(file); + fclose(sock); + return; +} +/* + * routine to print error on stout or syslog + */ +void PrintErr(char * error) +{ + if (demonize) { /* daemon mode */ + syslog(LOG_ERR, "%s: %m", error); /* log string and error message */ + } else { + perror(error); + } + return; +} + +void print_headers(FILE *file) +{ + time_t tempo; + + time(&tempo); + fprintf(file, "Date: %s", ctime(&tempo)); + fprintf(file, "Server: WWWd test server\n"); + fprintf(file, "Connection: close\n"); + fprintf(file, "Content-Type: text/html; charset=iso-8859-1\n"); + fprintf(file, "\n"); + printf("Date: %s", ctime(&tempo)); + printf("Server: WWWd test server\n"); + printf("Connection: close\n"); + printf("Content-Type: text/html; charset=iso-8859-1\n"); + printf("\n"); + return; +}