/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2011 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <syslog.h>

#include "die.h"
#include "str.h"
#include "built_in.h"
#include "locking.h"
#include "xmalloc.h"
#include "curvetun.h"
#include "curve.h"
#include "curvetun_mgmt_servers.h"
#include "crypto.h"

struct server_store {
	int udp;
	char alias[256];
	char host[256];
	char port[6]; /* 5 + \0 */
	unsigned char publickey[crypto_box_pub_key_size];
	struct curve25519_proto proto_inf;
	unsigned char auth_token[crypto_auth_hmacsha512256_KEYBYTES];
	struct server_store *next;
};

static struct server_store *store = NULL;
static struct server_store *selected = NULL;
static struct rwlock store_lock;

static struct server_store *server_store_alloc(void)
{
	return xzmalloc(sizeof(struct server_store));
}

static void server_store_free(struct server_store *ss)
{
	if (!ss)
		return;
	memset(ss, 0, sizeof(struct server_store));
	xfree(ss);
}

enum parse_states {
	PARSE_ALIAS,
	PARSE_SERVER,
	PARSE_PORT,
	PARSE_CARRIER,
	PARSE_PUBKEY,
	PARSE_DONE,
};

static int parse_line(char *line, char *homedir)
{
	char *str;
	enum parse_states s = PARSE_ALIAS;
	struct server_store *elem;
	unsigned char pkey[crypto_box_pub_key_size];

	elem = server_store_alloc();
	elem->next = store;

	str = strtok(line, ";");
	for (; str != NULL;) {
		switch (s) {
		case PARSE_ALIAS:
			strlcpy(elem->alias, str, sizeof(elem->alias));
			s = PARSE_SERVER;
			break;
		case PARSE_SERVER:
			strlcpy(elem->host, str, sizeof(elem->host));
			s = PARSE_PORT;
			break;
		case PARSE_PORT:
			strlcpy(elem->port, str, sizeof(elem->port));
			s = PARSE_CARRIER;
			break;
		case PARSE_CARRIER:
			if (!strncmp("udp", str, strlen("udp")))
				elem->udp = 1;
			else if (!strncmp("tcp", str, strlen("tcp")))
				elem->udp = 0;
			else {
				syslog(LOG_ERR, "Incorrect carrier type !(udp|tcp) in server spec.\n");
				return -EIO;
			}
			s = PARSE_PUBKEY;
			break;
		case PARSE_PUBKEY:
			if (!curve25519_pubkey_hexparse_32(pkey, sizeof(pkey),
							   str, strlen(str)))
				return -EINVAL;
			memcpy(elem->publickey, pkey, sizeof(elem->publickey));
			memcpy(elem->auth_token, pkey, sizeof(elem->auth_token));
			curve25519_proto_init(&elem->proto_inf, elem->publickey, sizeof(elem->publickey));
			s = PARSE_DONE;
			break;
		case PARSE_DONE:
			break;
		default:
			return -EIO;
		}

		str = strtok(NULL, ";");
	}

	store = elem;
	return s == PARSE_DONE ? 0 : -EIO;
}

void parse_userfile_and_generate_serv_store_or_die(char *homedir)
{
	FILE *fp;
	char path[PATH_MAX], buff[1024];
	int line = 1, ret;

	memset(path, 0, sizeof(path));
	slprintf(path, sizeof(path), "%s/%s", homedir, FILE_SERVERS);

	rwlock_init(&store_lock);
	rwlock_wr_lock(&store_lock);

	fp = fopen(path, "r");
	if (!fp)
		panic("Cannot open server file!\n");

	memset(buff, 0, sizeof(buff));
	while (fgets(buff, sizeof(buff), fp) != NULL) {
		buff[sizeof(buff) - 1] = 0;
		/* A comment. Skip this line */
		if (buff[0] == '#' || buff[0] == '\n') {
			memset(buff, 0, sizeof(buff));
			line++;
			continue;
		}

		ret = parse_line(buff, homedir);
		if (ret < 0)
			panic("Cannot parse line %d from clients!\n", line);
		line++;
		memset(buff, 0, sizeof(buff));
	}

	fclose(fp);

	if (store == NULL)
		panic("No registered servers found!\n");

	rwlock_unlock(&store_lock);
}

void dump_serv_store(void)
{
	int i;
	struct server_store *elem;

	rwlock_rd_lock(&store_lock);
	elem = store;
	while (elem) {
		printf("[%s] -> %s:%s via %s -> ", elem->alias,
		       elem->host, elem->port,
		       elem->udp ? "udp" : "tcp");
		for (i = 0; i < sizeof(elem->publickey); ++i)
			if (i == (sizeof(elem->publickey) - 1))
				printf("%02x\n", (unsigned char)
				       elem->publickey[i]);
			else
				printf("%02x:", (unsigned char)
				       elem->publickey[i]);
		elem = elem->next;
	}
	rwlock_unlock(&store_lock);
}

void destroy_serv_store(void)
{
	struct server_store *elem, *nelem = NULL;

	rwlock_wr_lock(&store_lock);
	selected = NULL;
	elem = store;
	while (elem) {
		nelem = elem->next;
		elem->next = NULL;
		server_store_free(elem);
		elem = nelem;
	}
	rwlock_unlock(&store_lock);
	rwlock_destroy(&store_lock);
}

void get_serv_store_entry_by_alias(char *alias, size_t len,
				   char **host, char **port, int *udp)
{
	struct server_store *elem;

	rwlock_rd_lock(&store_lock);
	elem = store;
	if (!alias) {
		while (elem && elem->next)
			elem = elem->next;
		if (elem) {
			(*host) = elem->host;
			(*port) = elem->port;
			(*udp) = elem->udp;
			selected = elem;
		} else {
			rwlock_unlock(&store_lock);
			goto nothing;
		}
	} else {
		while (elem) {
			if (!strncmp(elem->alias, alias,
				     min(len, strlen(elem->alias) + 1)))
				break;
			elem = elem->next;
		}
		if (elem) {
			(*host) = elem->host;
			(*port) = elem->port;
			(*udp) = elem->udp;
			selected = elem;
		} else {
			rwlock_unlock(&store_lock);
			goto nothing;
		}
	}
	rwlock_unlock(&store_lock);

	return;
nothing:
	(*host) = NULL;
	(*port) = NULL;
	(*udp) = -1;
}

struct curve25519_proto *get_serv_store_entry_proto_inf(void)
{
	struct curve25519_proto *ret = NULL;

	rwlock_rd_lock(&store_lock);
	if (selected)
		ret = &selected->proto_inf;
	rwlock_unlock(&store_lock);

	return ret;
}

unsigned char *get_serv_store_entry_auth_token(void)
{
	unsigned char *ret = NULL;

	rwlock_rd_lock(&store_lock);
	if (selected)
		ret = selected->auth_token;
	rwlock_unlock(&store_lock);

	return ret;
}
='commit-subject'>ASoC: samsung: Don't set unused struct snd_pcm_hardware fields</div><div class='commit-msg'>The ASoC core assumes that the PCM component of the ASoC card transparently
moves data around and does not impose any restrictions on the memory layout or
the transfer speed. It ignores all fields from the snd_pcm_hardware struct for
the PCM driver that are related to this. Setting these fields in the PCM driver
might suggest otherwise though, so rather not set them.

Signed-off-by: Lars-Peter Clausen &lt;lars@metafoo.de&gt;
Signed-off-by: Mark Brown &lt;broonie@linaro.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=328089a47112a4fc06071e2003ecd75cc6d31029'>Diffstat</a> (limited to 'sound/soc')</div><table summary='diffstat' class='diffstat'>