X-Git-Url: http://www.dolda2000.com/gitweb/?p=ashd.git;a=blobdiff_plain;f=src%2Fhtparser.c;h=1ed91754f78f36d62c6de672fb7c1a06a9a3fff8;hp=17ad93abc7234142a3e11e54a5bab85fd3dc93ad;hb=90b0ba0f9d93e454cc08a566b718abdcbfd0d9f6;hpb=43c58ba25e47635c8f44e6b1cbda9247219a16b5

diff --git a/src/htparser.c b/src/htparser.c
index 17ad93a..1ed9175 100644
--- a/src/htparser.c
+++ b/src/htparser.c
@@ -19,9 +19,11 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <fcntl.h>
 #include <string.h>
 #include <sys/socket.h>
 #include <pwd.h>
+#include <sys/signal.h>
 #include <errno.h>
 
 #ifdef HAVE_CONFIG_H
@@ -38,6 +40,7 @@
 
 static int plex;
 static char *pidfile = NULL;
+static int daemonize, usesyslog;
 
 static void trimx(struct hthead *req)
 {
@@ -74,6 +77,8 @@ static struct hthead *parsereq(FILE *in)
 	    goto fail;
 	} else {
 	    bufadd(method, c);
+	    if(method.d >= 128)
+		goto fail;
 	}
     }
     while(1) {
@@ -84,6 +89,8 @@ static struct hthead *parsereq(FILE *in)
 	    goto fail;
 	} else {
 	    bufadd(url, c);
+	    if(url.d >= 65536)
+		goto fail;
 	}
     }
     while(1) {
@@ -95,6 +102,8 @@ static struct hthead *parsereq(FILE *in)
 	    goto fail;
 	} else {
 	    bufadd(ver, c);
+	    if(ver.d >= 128)
+		goto fail;
 	}
     }
     bufadd(method, 0);
@@ -271,13 +280,19 @@ void serve(FILE *in, struct conn *conn)
 	if((resp = parseresp(out)) == NULL)
 	    break;
 	replstr(&resp->ver, req->ver);
+	
+	if(!getheader(resp, "server"))
+	    headappheader(resp, "Server", sprintf3("ashd/%s", VERSION));
 
 	if(!strcmp(req->ver, "HTTP/1.0")) {
 	    writeresp(in, resp);
 	    fprintf(in, "\r\n");
-	    if((hd = getheader(resp, "content-length")) != NULL) {
-		dlen = passdata(out, in, -1);
-		if(dlen != atoo(hd))
+	    if(!strcasecmp(req->method, "head")) {
+		if(!hasheader(req, "connection", "keep-alive"))
+		    break;
+	    } else if((hd = getheader(resp, "content-length")) != NULL) {
+		dlen = atoo(hd);
+		if(passdata(out, in, dlen) != dlen)
 		    break;
 		if(!hasheader(req, "connection", "keep-alive"))
 		    break;
@@ -288,11 +303,14 @@ void serve(FILE *in, struct conn *conn)
 	    if(hasheader(req, "connection", "close") || hasheader(resp, "connection", "close"))
 		break;
 	} else if(!strcmp(req->ver, "HTTP/1.1")) {
-	    if((hd = getheader(resp, "content-length")) != NULL) {
+	    if(!strcasecmp(req->method, "head")) {
 		writeresp(in, resp);
 		fprintf(in, "\r\n");
-		dlen = passdata(out, in, -1);
-		if(dlen != atoo(hd))
+	    } else if((hd = getheader(resp, "content-length")) != NULL) {
+		writeresp(in, resp);
+		fprintf(in, "\r\n");
+		dlen = atoo(hd);
+		if(passdata(out, in, dlen) != dlen)
 		    break;
 	    } else if(!getheader(resp, "transfer-encoding")) {
 		headappheader(resp, "Transfer-Encoding", "chunked");
@@ -350,6 +368,26 @@ static void plexwatch(struct muth *muth, va_list args)
     }
 }
 
+static void initroot(void *uu)
+{
+    int fd;
+    
+    if(daemonize) {
+	setsid();
+	chdir("/");
+	if((fd = open("/dev/null", O_RDWR)) >= 0) {
+	    dup2(fd, 0);
+	    dup2(fd, 1);
+	    dup2(fd, 2);
+	    close(fd);
+	}
+    }
+    if(usesyslog)
+	putenv("ASHD_USESYSLOG=1");
+    else
+	unsetenv("ASHD_USESYSLOG");
+}
+
 static void usage(FILE *out)
 {
     fprintf(out, "usage: htparser [-hSf] [-u USER] [-r ROOT] [-p PIDFILE] PORTSPEC... -- ROOT [ARGS...]\n");
@@ -406,12 +444,11 @@ int main(int argc, char **argv)
 {
     int c;
     int i, s1;
-    int daemonize, logsys;
     char *root;
     FILE *pidout;
     struct passwd *pwent;
     
-    daemonize = logsys = 0;
+    daemonize = usesyslog = 0;
     root = NULL;
     pwent = NULL;
     while((c = getopt(argc, argv, "+hSfu:r:p:")) >= 0) {
@@ -423,7 +460,7 @@ int main(int argc, char **argv)
 	    daemonize = 1;
 	    break;
 	case 'S':
-	    logsys = 1;
+	    usesyslog = 1;
 	    break;
 	case 'u':
 	    if((pwent = getpwnam(optarg)) == NULL) {
@@ -453,7 +490,7 @@ int main(int argc, char **argv)
 	usage(stderr);
 	exit(1);
     }
-    if((plex = stdmkchild(argv + ++i)) < 0) {
+    if((plex = stdmkchild(argv + ++i, initroot, NULL)) < 0) {
 	flog(LOG_ERR, "could not spawn root multiplexer: %s", strerror(errno));
 	return(1);
     }
@@ -465,10 +502,10 @@ int main(int argc, char **argv)
 	    return(1);
 	}
     }
-    if(logsys)
+    if(usesyslog)
 	opensyslog();
     if(root) {
-	if(chroot(root)) {
+	if(chdir(root) || chroot(root)) {
 	    flog(LOG_ERR, "could not chroot to %s: %s", root, strerror(errno));
 	    exit(1);
 	}
@@ -483,12 +520,14 @@ int main(int argc, char **argv)
 	    exit(1);
 	}
     }
+    signal(SIGPIPE, SIG_IGN);
     if(daemonize) {
 	daemon(0, 0);
     }
-    if(pidout != NULL)
+    if(pidout != NULL) {
 	fprintf(pidout, "%i\n", getpid());
-    fclose(pidout);
+	fclose(pidout);
+    }
     ioloop();
     return(0);
 }