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/*
 * Alternate testbrowse utility provided by Mikhail Kshevetskiy.
 * This version tests use of multiple contexts.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libsmbclient.h>

int	debuglevel	= 0;
const char	*workgroup	= "NT";
const char	*username	= "guest";
const char	*password	= "";

typedef struct smbitem smbitem;
typedef int(*qsort_cmp)(const void *, const void *);

struct smbitem{
    smbitem	*next;
    int		type;
    char	name[1];
};

static void smbc_auth_fn(
                const char      *server,
		const char      *share,
		char            *wrkgrp, int wrkgrplen,
		char            *user,   int userlen,
		char            *passwd, int passwdlen){

	(void) server;
	(void) share;
	(void) wrkgrp;
	(void) wrkgrplen;

	strncpy(wrkgrp, workgroup, wrkgrplen - 1); wrkgrp[wrkgrplen - 1] = 0;
	strncpy(user, username, userlen - 1); user[userlen - 1] = 0;
	strncpy(passwd, password, passwdlen - 1); passwd[passwdlen - 1] = 0;
}

static SMBCCTX* create_smbctx(void){
	SMBCCTX	*ctx;

	if ((ctx = smbc_new_context()) == NULL) return NULL;

	smbc_setDebug(ctx, debuglevel);
	smbc_setFunctionAuthData(ctx, smbc_auth_fn);

	if (smbc_init_context(ctx) == NULL){
		smbc_free_context(ctx, 1);
		return NULL;
	}

	return ctx;
}

static void delete_smbctx(SMBCCTX* ctx){
	smbc_getFunctionPurgeCachedServers(ctx)(ctx);
	smbc_free_context(ctx, 1);
}

static smbitem* get_smbitem_list(SMBCCTX *ctx, char *smb_path){
	SMBCFILE		*fd;
	struct smbc_dirent	*dirent;
	smbitem		*list = NULL, *item;

	if ((fd = smbc_getFunctionOpendir(ctx)(ctx, smb_path)) == NULL)
		return NULL;
	while((dirent = smbc_getFunctionReaddir(ctx)(ctx, fd)) != NULL){
		size_t slen;
		if (strcmp(dirent->name, "") == 0) continue;
		if (strcmp(dirent->name, ".") == 0) continue;
		if (strcmp(dirent->name, "..") == 0) continue;

		slen = strlen(dirent->name)+1;
		if ((item = malloc(sizeof(smbitem) + slen)) == NULL)
			continue;

		item->next = list;
		item->type = dirent->smbc_type;
		memcpy(item->name, dirent->name, slen);
		list = item;
	}
	smbc_getFunctionClose(ctx)(ctx, fd);
	return /* smbitem_list_sort */ (list);
}

static void print_smb_path(const char *group, const char *path){
	if ((strlen(group) == 0) && (strlen(path) == 0)) printf("/\n");
	else if (strlen(path) == 0) printf("/%s\n", group);
	else{
		if (strlen(group) == 0) group = "(unknown_group)";
		printf("/%s/%s\n", group, path);
	}
}

static void recurse(SMBCCTX *ctx, const char *smb_group, char *smb_path, int maxlen){
	int 	len;
	smbitem	*list, *item;
	SMBCCTX	*ctx1;

	len = strlen(smb_path);

	list = get_smbitem_list(ctx, smb_path);
	while(list != NULL){
		switch(list->type){
		case SMBC_WORKGROUP:
		case SMBC_SERVER:
			if (list->type == SMBC_WORKGROUP){
				print_smb_path(list->name, "");
				smb_group = list->name;
			}
			else print_smb_path(smb_group, list->name);

			if (maxlen < 7 + strlen(list->name)) break;
			strncpy(smb_path + 6, list->name, maxlen - 6);
			smb_path[maxlen-1] = '\0';
			if ((ctx1 = create_smbctx()) != NULL){
				recurse(ctx1, smb_group, smb_path, maxlen);
				delete_smbctx(ctx1);
			}else{
				recurse(ctx, smb_group, smb_path, maxlen);
				smbc_getFunctionPurgeCachedServers(ctx)(ctx);
			}
			break;
		case SMBC_FILE_SHARE:
		case SMBC_DIR:
		case SMBC_FILE:
			if (maxlen < len + strlen(list->name) + 2) break;

			smb_path[len] = '/';
			strncpy(smb_path + len + 1, list->name, maxlen - len - 1);
			smb_path[maxlen-1] = '\0';
			print_smb_path(smb_group, smb_path + 6);
			if (list->type != SMBC_FILE){
				recurse(ctx, smb_group, smb_path, maxlen);
				if (list->type == SMBC_FILE_SHARE)
					smbc_getFunctionPurgeCachedServers(ctx)(ctx);
			}
			break;
		}
		item = list;
		list = list->next;
		free(item);
	}
	smb_path[len] = '\0';
}

int main(int argc, char *argv[]){
	int		i;
	SMBCCTX	*ctx;
	char	smb_path[32768] = "smb://";

	if ((ctx = create_smbctx()) == NULL){
		perror("Can't create samba context.");
		return 1;
	}

	if (argc == 1) recurse(ctx, "", smb_path, sizeof(smb_path));
	else for(i = 1; i < argc; i++){
			strncpy(smb_path + 6, argv[i], sizeof(smb_path) - 7);
			smb_path[sizeof(smb_path) - 1] = '\0';
			recurse(ctx, "", smb_path, sizeof(smb_path));
		}

	delete_smbctx(ctx);
	return 0;
}