1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright (c) 1996-1998,2001 by Sun Microsystems, Inc. 24*7c478bd9Sstevel@tonic-gate * All rights reserved. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate /* 30*7c478bd9Sstevel@tonic-gate * Protocol interpreter for the Hypertext Transfer Protocol (HTTP) 31*7c478bd9Sstevel@tonic-gate * 32*7c478bd9Sstevel@tonic-gate * Relevant standards: 33*7c478bd9Sstevel@tonic-gate * Berners-Lee, T., et al: Hypertext Transfer Protocol -- HTTP/1.0. 34*7c478bd9Sstevel@tonic-gate * RFC 1945, May 1996 35*7c478bd9Sstevel@tonic-gate * Fielding, R., et al: Hypertext Transfer Protocol -- HTTP/1.1. 36*7c478bd9Sstevel@tonic-gate * RFC 2068, June 1999 37*7c478bd9Sstevel@tonic-gate */ 38*7c478bd9Sstevel@tonic-gate 39*7c478bd9Sstevel@tonic-gate #include <netinet/in.h> 40*7c478bd9Sstevel@tonic-gate #include <stdio.h> 41*7c478bd9Sstevel@tonic-gate #include <string.h> 42*7c478bd9Sstevel@tonic-gate #include <ctype.h> 43*7c478bd9Sstevel@tonic-gate #include "snoop.h" 44*7c478bd9Sstevel@tonic-gate 45*7c478bd9Sstevel@tonic-gate #define CR 13 /* "carriage return" character */ 46*7c478bd9Sstevel@tonic-gate #define LF 10 /* "line feed" character */ 47*7c478bd9Sstevel@tonic-gate 48*7c478bd9Sstevel@tonic-gate /* 49*7c478bd9Sstevel@tonic-gate * Summary lines: packet contents starting with less than MINCHARS 50*7c478bd9Sstevel@tonic-gate * printable characters will not be printed. MAXCHARS is the maximum 51*7c478bd9Sstevel@tonic-gate * number of characters printed. 52*7c478bd9Sstevel@tonic-gate * Detail lines: NLINES is the maximum number of content lines to print 53*7c478bd9Sstevel@tonic-gate */ 54*7c478bd9Sstevel@tonic-gate #define MINCHARS 10 55*7c478bd9Sstevel@tonic-gate #define MAXCHARS 80 56*7c478bd9Sstevel@tonic-gate #define NLINES 5 57*7c478bd9Sstevel@tonic-gate 58*7c478bd9Sstevel@tonic-gate #define MIN(a, b) (((a) < (b)) ? (a) : (b)) 59*7c478bd9Sstevel@tonic-gate 60*7c478bd9Sstevel@tonic-gate static int printable(const char *line, const char *endp); 61*7c478bd9Sstevel@tonic-gate 62*7c478bd9Sstevel@tonic-gate int 63*7c478bd9Sstevel@tonic-gate interpret_http(int flags, char *line, int fraglen) 64*7c478bd9Sstevel@tonic-gate { 65*7c478bd9Sstevel@tonic-gate char *p, *q, *endp; 66*7c478bd9Sstevel@tonic-gate int c; 67*7c478bd9Sstevel@tonic-gate int lineno; 68*7c478bd9Sstevel@tonic-gate 69*7c478bd9Sstevel@tonic-gate endp = line + fraglen; 70*7c478bd9Sstevel@tonic-gate 71*7c478bd9Sstevel@tonic-gate if (flags & F_SUM) { 72*7c478bd9Sstevel@tonic-gate c = printable(line, endp - 1); 73*7c478bd9Sstevel@tonic-gate if (c < MINCHARS) { 74*7c478bd9Sstevel@tonic-gate (void) snprintf(get_sum_line(), MAXLINE, 75*7c478bd9Sstevel@tonic-gate "HTTP (body)"); 76*7c478bd9Sstevel@tonic-gate } else { 77*7c478bd9Sstevel@tonic-gate (void) snprintf(get_sum_line(), MAXLINE, 78*7c478bd9Sstevel@tonic-gate "HTTP %.*s", MIN(c, MAXCHARS), line); 79*7c478bd9Sstevel@tonic-gate } 80*7c478bd9Sstevel@tonic-gate } 81*7c478bd9Sstevel@tonic-gate 82*7c478bd9Sstevel@tonic-gate if (flags & F_DTAIL) { 83*7c478bd9Sstevel@tonic-gate show_header("HTTP: ", "HyperText Transfer Protocol", fraglen); 84*7c478bd9Sstevel@tonic-gate show_space(); 85*7c478bd9Sstevel@tonic-gate 86*7c478bd9Sstevel@tonic-gate lineno = 0; 87*7c478bd9Sstevel@tonic-gate for (p = line; p < endp && lineno < NLINES; p = q + 1) { 88*7c478bd9Sstevel@tonic-gate c = printable(p, endp - 1); 89*7c478bd9Sstevel@tonic-gate 90*7c478bd9Sstevel@tonic-gate /* stop if no printables, except if at line end */ 91*7c478bd9Sstevel@tonic-gate if (c == 0 && *p != CR && *p != LF) 92*7c478bd9Sstevel@tonic-gate break; 93*7c478bd9Sstevel@tonic-gate 94*7c478bd9Sstevel@tonic-gate /* 95*7c478bd9Sstevel@tonic-gate * A line may be terminated either by an CR LF sequence 96*7c478bd9Sstevel@tonic-gate * (DOS, Mac), or by LF alone 97*7c478bd9Sstevel@tonic-gate */ 98*7c478bd9Sstevel@tonic-gate 99*7c478bd9Sstevel@tonic-gate q = memchr(p, CR, (endp - p)); 100*7c478bd9Sstevel@tonic-gate if (q != NULL) { 101*7c478bd9Sstevel@tonic-gate if (q < endp - 1 && q[1] == LF) 102*7c478bd9Sstevel@tonic-gate ++q; /* ignore subsequent LF character */ 103*7c478bd9Sstevel@tonic-gate } else { 104*7c478bd9Sstevel@tonic-gate q = memchr(p, LF, (endp - p)); 105*7c478bd9Sstevel@tonic-gate /* no CR/LF: use end of buffer */ 106*7c478bd9Sstevel@tonic-gate if (q == NULL) 107*7c478bd9Sstevel@tonic-gate q = endp - 1; 108*7c478bd9Sstevel@tonic-gate } 109*7c478bd9Sstevel@tonic-gate 110*7c478bd9Sstevel@tonic-gate /* truncate lines containing non-printable characters */ 111*7c478bd9Sstevel@tonic-gate (void) snprintf(get_line(0, c), get_line_remain(), 112*7c478bd9Sstevel@tonic-gate "%.*s", c, p); 113*7c478bd9Sstevel@tonic-gate ++lineno; 114*7c478bd9Sstevel@tonic-gate } 115*7c478bd9Sstevel@tonic-gate 116*7c478bd9Sstevel@tonic-gate if (p < endp) /* there was more data to be printed */ 117*7c478bd9Sstevel@tonic-gate (void) snprintf(get_line(0, 5), get_line_remain(), 118*7c478bd9Sstevel@tonic-gate "[...]"); 119*7c478bd9Sstevel@tonic-gate 120*7c478bd9Sstevel@tonic-gate show_space(); 121*7c478bd9Sstevel@tonic-gate } 122*7c478bd9Sstevel@tonic-gate 123*7c478bd9Sstevel@tonic-gate return (fraglen); 124*7c478bd9Sstevel@tonic-gate } 125*7c478bd9Sstevel@tonic-gate 126*7c478bd9Sstevel@tonic-gate /* 127*7c478bd9Sstevel@tonic-gate * Return the length of the initial string starting with "startp" and 128*7c478bd9Sstevel@tonic-gate * ending with "endp" (inclusively) consisting only of printable 129*7c478bd9Sstevel@tonic-gate * characters. 130*7c478bd9Sstevel@tonic-gate */ 131*7c478bd9Sstevel@tonic-gate 132*7c478bd9Sstevel@tonic-gate static int 133*7c478bd9Sstevel@tonic-gate printable(const char *startp, const char *endp) 134*7c478bd9Sstevel@tonic-gate { 135*7c478bd9Sstevel@tonic-gate const char *p = startp; 136*7c478bd9Sstevel@tonic-gate 137*7c478bd9Sstevel@tonic-gate while (p <= endp && (isprint(*p) || *p == '\t')) 138*7c478bd9Sstevel@tonic-gate p++; 139*7c478bd9Sstevel@tonic-gate 140*7c478bd9Sstevel@tonic-gate return (p - startp); 141*7c478bd9Sstevel@tonic-gate } 142