| 1 | /* Copyright (c) 2001, Stanford University
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| 2 | * All rights reserved
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| 3 | *
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| 4 | * See the file LICENSE.txt for information on redistributing this software.
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| 5 | */
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| 6 |
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| 7 | #include <stdio.h>
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| 8 | #include <stdlib.h>
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| 9 | #include <ctype.h>
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| 10 |
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| 11 | #include "cr_string.h"
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| 12 | #include "cr_url.h"
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| 13 | #include "cr_error.h"
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| 14 |
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| 15 | static int is_digit_string( const char *s )
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| 16 | {
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| 17 | if (!isdigit( (int) *s))
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| 18 | {
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| 19 | return 0;
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| 20 | }
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| 21 |
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| 22 | while (*s && isdigit ( (int) *s))
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| 23 | {
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| 24 | s++;
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| 25 | }
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| 26 |
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| 27 | return ( *s == 0 );
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| 28 | }
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| 29 |
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| 30 | int crParseURL( const char *url, char *protocol, char *hostname,
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| 31 | unsigned short *port, unsigned short default_port )
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| 32 | {
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| 33 | const char *temp, *temp2;
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| 34 |
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| 35 | /* pull off the protocol */
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| 36 | temp = crStrstr( url, "://" );
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| 37 | if ( temp == NULL && protocol != NULL )
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| 38 | {
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| 39 | crStrcpy( protocol, "tcpip" );
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| 40 | temp = url;
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| 41 | }
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| 42 | else
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| 43 | {
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| 44 | if (protocol != NULL) {
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| 45 | int len = temp - url;
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| 46 | crStrncpy( protocol, url, len );
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| 47 | protocol[len] = 0;
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| 48 | }
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| 49 | temp += 3;
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| 50 | }
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| 51 |
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| 52 | /* handle a trailing :<digits> to specify the port */
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| 53 |
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| 54 | /* there might be a filename here */
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| 55 | temp2 = crStrrchr( temp, '/' );
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| 56 | if ( temp2 == NULL )
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| 57 | {
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| 58 | temp2 = crStrrchr( temp, '\\' );
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| 59 | }
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| 60 | if ( temp2 == NULL )
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| 61 | {
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| 62 | temp2 = temp;
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| 63 | }
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| 64 |
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| 65 | temp2 = crStrrchr( temp2, ':' );
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| 66 | if ( temp2 )
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| 67 | {
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| 68 | if (hostname != NULL) {
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| 69 | int len = temp2 - temp;
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| 70 | crStrncpy( hostname, temp, len );
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| 71 | hostname[len] = 0;
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| 72 | }
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| 73 | temp2++;
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| 74 | if ( !is_digit_string( temp2 ) )
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| 75 | goto bad_url;
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| 76 |
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| 77 | if (port != NULL)
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| 78 | *port = (unsigned short) atoi( temp2 );
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| 79 | }
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| 80 | else
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| 81 | {
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| 82 | if (hostname != NULL)
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| 83 | crStrcpy( hostname, temp );
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| 84 | if (port != NULL)
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| 85 | *port = default_port;
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| 86 | }
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| 87 |
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| 88 | return 1;
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| 89 |
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| 90 | bad_url:
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| 91 | crWarning( "URL: expected <protocol>://"
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| 92 | "<destination>[:<port>], what is \"%s\"?", url );
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| 93 | return 0;
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| 94 | }
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