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- #include "string.h"
- #include "resolv.h"
- #include "etherboot.h" /* for arptable */
- #include "url.h"
-
- /*
- * Parse a URL and deduce a struct protocol *, a struct sockaddr_in
- * and a char *filename.
- *
- * We accept URLs of the form
- *
- * [protocol://[host][:port]/]path/to/file
- *
- * Returns 1 for success, 0 for failure (e.g. unknown protocol).
- *
- */
- int parse_url ( char *url, struct protocol **proto,
- struct sockaddr_in *server, char **filename ) {
- char *p;
- char *protocol = NULL;
- char *host = NULL;
- char *port = NULL;
- int rc = 0;
-
- DBG ( "URL parsing \"%s\"\n", url );
-
- /* If no protocol is present, the whole URL will be a filename */
- *filename = url;
-
- /* Search for a protocol delimiter. If found, parse out the
- * host and port parts of the URL, inserting NULs to terminate
- * the different sections.
- */
- for ( p = url ; *p ; p++ ) {
- if ( memcmp ( p, "://", 3 ) != 0 )
- continue;
-
- /* URL has an explicit protocol */
- *p = '\0';
- p += 3;
- protocol = url;
- host = p;
-
- /* Search for port and file delimiters */
- for ( ; *p ; p++ ) {
- if ( *p == ':' ) {
- *p = '\0';
- port = p + 1;
- continue;
- }
- if ( *p == '/' ) {
- *(p++) = '\0';
- break;
- }
- }
- *filename = p;
-
- break;
- }
- DBG ( "URL protocol \"%s\" host \"%s\" port \"%s\" file \"%s\"\n",
- protocol ? protocol : "(default)", host ? host : "(default)",
- port ? port : "(default)", *filename );
-
- /* Identify the protocol */
- *proto = identify_protocol ( protocol );
- if ( ! *proto ) {
- DBG ( "URL unknown protocol \"%s\"\n",
- protocol ? protocol : "(default)" );
- goto out;
- }
-
- /* Identify the host */
- server->sin_addr = arptable[ARP_SERVER].ipaddr;
- if ( host && host[0] ) {
- if ( ! resolv ( &server->sin_addr, host ) ) {
- DBG ( "URL unknown host \"%s\"\n", host );
- goto out;
- }
- }
-
- /* Identify the port */
- server->sin_port = (*proto)->default_port;
- if ( port && port[0] ) {
- server->sin_port = strtoul ( port, NULL, 10 );
- }
-
- rc = 1;
-
- out:
- /* Fill back in the original URL */
- if ( protocol ) {
- (*filename)[-1] = '/';
- if ( port )
- port[-1] = ':';
- host[-3] = ':';
- }
- return rc;
- }
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