int hash_tbl_add (uint8_t *key, HASH_TABLE *htbl, void *data)
{
if (hash_add_entry (key , htbl, data) < 0) {
return -1;
}
return 0;
}
int main(int argc, char *argv[])
{
if (getuid()) {
fprintf(stderr, "the ftpserver must started by root\n");
exit(EXIT_FAILURE);
}
if (signal(SIGCHLD, handle_sigchld) == SIG_ERR)
ERR_EXIT("signal");
parse_load_file("ftpserver.conf");
printf("parse_load_file success\n");
// printconfig();
ip_to_clients = hash_alloc(256, hash_func);
pid_to_ip = hash_alloc(256, hash_func);
int listenfd;
listenfd = tcp_server(listen_address, listen_port);
printf("tcp_server success, listenfd = %d\n", listenfd);
int connfd;
pid_t pid;
session_t sess;
while (1) {
struct sockaddr_in addr;
connfd = accept_time_out(listenfd, &addr, accept_timeout);
if (connfd == -1) {
// printf("don't has connection in %d seconds\n", accept_timeout);
continue;
}
uint32_t ip = addr.sin_addr.s_addr;
printf("connect success\n");
session_init(&sess);
num_of_clients++;
sess.curr_clients = num_of_clients;
sess.curr_ip_clients = add_ip_to_hash(ip_to_clients, ip);
sess.ip = ip;
p_sess = &sess;
pid = fork();
if (pid == -1) {
ERR_EXIT("fork error");
} else if (pid == 0) { //子进程
close(listenfd);
sess.peerfd = connfd;
session_begin(&sess); //建立一个会话
exit(EXIT_SUCCESS);
} else { //父进程
close(connfd);
hash_add_entry(pid_to_ip, &pid, sizeof(pid), &ip, sizeof(ip));
}
}
return 0;
}
/* Entry is eaten.
* No check is done if entry->tuple is a member of sym->set !
* This has to be done before.
*/
void symbol_add_entry(Symbol* sym, Entry* entry)
{
const Tuple* tuple;
assert(symbol_is_valid(sym));
assert(entry_is_valid(entry));
assert(sym->used <= sym->size);
if (sym->used == sym->size)
{
sym->size += sym->extend;
sym->extend += sym->extend;
sym->entry = realloc(
sym->entry, (size_t)sym->size * sizeof(*sym->entry));
assert(sym->entry != NULL);
}
assert(sym->used < sym->size);
tuple = entry_get_tuple(entry);
/* There is no index set for the internal symbol.
*/
assert(!strcmp(sym->name, SYMBOL_NAME_INTERNAL) || set_lookup(sym->set, tuple));
if (hash_has_entry(sym->hash, tuple))
{
if (stmt_trigger_warning(166))
{
fprintf(stderr, "--- Warning 166: Duplicate element ");
tuple_print(stderr, tuple);
fprintf(stderr, " for symbol %s rejected\n", sym->name);
}
entry_free(entry);
}
else
{
/* Falls noch nicht geschehen, legen wir hier den Typ des
* Symbols fest.
*/
if ((sym->type == SYM_ERR) && (sym->used == 0))
sym->type = entry_get_type(entry);
assert(sym->type != SYM_ERR);
hash_add_entry(sym->hash, entry);
sym->entry[sym->used] = entry;
sym->used++;
}
}
unsigned int add_ip_to_hash(hash_t *hash, uint32_t ip)
{
unsigned int *p_value = (unsigned int*)hash_lookup_value_by_key(hash,&ip,sizeof(ip));
if (p_value == NULL) {
unsigned int value = 1;
hash_add_entry(hash, &ip, sizeof(ip), &value, sizeof(value));
return 1;
} else {
unsigned int value = *p_value;
value++;
*p_value = value;
return value;
}
}
static void
declare(char *name, int value)
{
KEYWORD *n;
KEYWORD *k = (KEYWORD *)tac_malloc(sizeof(KEYWORD));
k->word = tac_strdup(name);
k->value = value;
n = hash_add_entry(wordtable, (void *) k);
if (n) {
report(LOG_ERR, "Attempt to multiply define keyword %s", name);
tac_exit(1);
}
}
int main(void)
{
stu2_t stu_arr[] =
{
{ 1234, "AAAA", 20 },
{ 4568, "BBBB", 23 },
{ 6729, "AAAA", 19 }
};
hash_t *hash = hash_alloc(256, hash_int);
int size = sizeof(stu_arr) / sizeof(stu_arr[0]);
int i;
for (i=0; i<size; i++)
{
hash_add_entry(hash, &(stu_arr[i].sno), sizeof(stu_arr[i].sno),
&stu_arr[i], sizeof(stu_arr[i]));
}
int sno = 4568;
stu2_t *s = (stu2_t *)hash_lookup_entry(hash, &sno, sizeof(sno));
if (s)
{
printf("%d %s %d\n", s->sno, s->name, s->age);
}
else
{
printf("not found\n");
}
sno = 1234;
hash_free_entry(hash, &sno, sizeof(sno));
s = (stu2_t *)hash_lookup_entry(hash, &sno, sizeof(sno));
if (s)
{
printf("%d %s %d\n", s->sno, s->name, s->age);
}
else
{
printf("not found\n");
}
return 0;
}
static unsigned int
handle_ip_count(struct vsf_sysutil_ipv4addr* p_accept_addr)
{
unsigned int* p_count =
(unsigned int*)hash_lookup_entry(s_p_ip_count_hash, (void*)p_accept_addr);
unsigned int count;
if (!p_count)
{
count = 1;
hash_add_entry(s_p_ip_count_hash, (void*)p_accept_addr, (void*)&count);
}
else
{
count = *p_count;
count++;
*p_count = count;
}
return count;
}
static unsigned int
handle_ip_count(void* p_ipaddr)
{
unsigned int* p_count =
(unsigned int*)hash_lookup_entry(s_p_ip_count_hash, p_ipaddr);
unsigned int count;
if (!p_count)
{
count = 1;
hash_add_entry(s_p_ip_count_hash, p_ipaddr, (void*)&count);
}
else
{
count = *p_count;
count++;
*p_count = count;
}
return count;
}
unsigned int handle_ip_count(void *ip)
{
unsigned int count;
unsigned int* ip_count;
ip_count = hash_lookup_entry(s_ip_count_hash, ip, sizeof(unsigned int));
if (ip_count == NULL)
{
count = 1;
hash_add_entry(s_ip_count_hash, ip, sizeof(unsigned int), &count, sizeof(unsigned int));
}
else
{
count = *ip_count;
count++;
*ip_count = count;
}
return count;
}
struct vsf_client_launch
vsf_standalone_main(void)
{
struct vsf_sysutil_sockaddr* p_sockaddr = 0;
struct vsf_sysutil_ipv4addr listen_ipaddr;
int listen_sock = vsf_sysutil_get_ipv4_sock();
int retval;
s_p_ip_count_hash = hash_alloc(256, sizeof(struct vsf_sysutil_ipv4addr),
sizeof(unsigned int), hash_ip);
s_p_pid_ip_hash = hash_alloc(256, sizeof(int),
sizeof(struct vsf_sysutil_ipv4addr), hash_pid);
if (tunable_setproctitle_enable)
{
vsf_sysutil_setproctitle("LISTENER");
}
vsf_sysutil_install_sighandler(kVSFSysUtilSigCHLD, handle_sigchld, 0);
vsf_sysutil_install_async_sighandler(kVSFSysUtilSigHUP, handle_sighup);
vsf_sysutil_activate_reuseaddr(listen_sock);
vsf_sysutil_sockaddr_alloc_ipv4(&p_sockaddr);
vsf_sysutil_sockaddr_set_port(
p_sockaddr, vsf_sysutil_ipv4port_from_int(tunable_listen_port));
if (!tunable_listen_address ||
vsf_sysutil_inet_aton(tunable_listen_address, &listen_ipaddr) == 0)
{
listen_ipaddr = vsf_sysutil_sockaddr_get_any();
}
vsf_sysutil_sockaddr_set_ipaddr(p_sockaddr, listen_ipaddr);
retval = vsf_sysutil_bind(listen_sock, p_sockaddr);
vsf_sysutil_free(p_sockaddr);
if (vsf_sysutil_retval_is_error(retval))
{
die("could not bind listening socket");
}
vsf_sysutil_listen(listen_sock, VSFTP_LISTEN_BACKLOG);
while (1)
{
struct vsf_client_launch child_info;
static struct vsf_sysutil_sockaddr* p_accept_addr;
int new_child;
struct vsf_sysutil_ipv4addr ip_addr;
/* NOTE - wake up every 10 seconds to make sure we notice child exit
* in a timely manner (the sync signal framework race)
*/
int new_client_sock = vsf_sysutil_accept_timeout(
listen_sock, &p_accept_addr, 10);
if (s_reload_needed)
{
s_reload_needed = 0;
do_reload();
}
if (vsf_sysutil_retval_is_error(new_client_sock))
{
continue;
}
ip_addr = vsf_sysutil_sockaddr_get_ipaddr(p_accept_addr);
++s_children;
child_info.num_children = s_children;
child_info.num_this_ip = handle_ip_count(&ip_addr);
new_child = vsf_sysutil_fork_failok();
if (new_child != 0)
{
/* Parent context */
vsf_sysutil_close(new_client_sock);
if (new_child > 0)
{
hash_add_entry(s_p_pid_ip_hash, (void*)&new_child, (void*)&ip_addr);
}
else
{
/* fork() failed, clear up! */
--s_children;
drop_ip_count(&ip_addr);
}
/* Fall through to while() loop and accept() again */
}
else
{
/* Child context */
vsf_sysutil_close(listen_sock);
prepare_child(new_client_sock);
/* By returning here we "launch" the child process with the same
* contract as xinetd would provide.
*/
return child_info;
}
}
}
struct vsf_client_launch
vsf_standalone_main(void)
{
struct vsf_sysutil_sockaddr* p_accept_addr = 0;
int listen_sock = -1;
int retval;
s_ipaddr_size = vsf_sysutil_get_ipaddr_size();
if (tunable_listen && tunable_listen_ipv6)
{
die("run two copies of vsftpd for IPv4 and IPv6");
}
if (tunable_background)
{
int forkret = vsf_sysutil_fork();
if (forkret > 0)
{
/* Parent, just exit */
vsf_sysutil_exit(0);
}
vsf_sysutil_make_session_leader();
}
if (tunable_listen)
{
listen_sock = vsf_sysutil_get_ipv4_sock();
}
else
{
listen_sock = vsf_sysutil_get_ipv6_sock();
}
vsf_sysutil_activate_reuseaddr(listen_sock);
s_p_ip_count_hash = hash_alloc(256, s_ipaddr_size,
sizeof(unsigned int), hash_ip);
s_p_pid_ip_hash = hash_alloc(256, sizeof(int),
s_ipaddr_size, hash_pid);
if (tunable_setproctitle_enable)
{
vsf_sysutil_setproctitle("LISTENER");
}
vsf_sysutil_install_async_sighandler(kVSFSysUtilSigCHLD, handle_sigchld);
vsf_sysutil_install_async_sighandler(kVSFSysUtilSigHUP, handle_sighup);
if (tunable_listen)
{
struct vsf_sysutil_sockaddr* p_sockaddr = 0;
vsf_sysutil_sockaddr_alloc_ipv4(&p_sockaddr);
vsf_sysutil_sockaddr_set_port(p_sockaddr, tunable_listen_port);
if (!tunable_listen_address)
{
vsf_sysutil_sockaddr_set_any(p_sockaddr);
}
else
{
if (!vsf_sysutil_inet_aton(tunable_listen_address, p_sockaddr))
{
die2("bad listen_address: ", tunable_listen_address);
}
}
retval = vsf_sysutil_bind(listen_sock, p_sockaddr);
vsf_sysutil_free(p_sockaddr);
if (vsf_sysutil_retval_is_error(retval))
{
die("could not bind listening IPv4 socket");
}
}
else
{
struct vsf_sysutil_sockaddr* p_sockaddr = 0;
vsf_sysutil_sockaddr_alloc_ipv6(&p_sockaddr);
vsf_sysutil_sockaddr_set_port(p_sockaddr, tunable_listen_port);
if (!tunable_listen_address6)
{
vsf_sysutil_sockaddr_set_any(p_sockaddr);
}
else
{
struct mystr addr_str = INIT_MYSTR;
const unsigned char* p_raw_addr;
str_alloc_text(&addr_str, tunable_listen_address6);
p_raw_addr = vsf_sysutil_parse_ipv6(&addr_str);
str_free(&addr_str);
if (!p_raw_addr)
{
die2("bad listen_address6: ", tunable_listen_address6);
}
vsf_sysutil_sockaddr_set_ipv6addr(p_sockaddr, p_raw_addr);
}
retval = vsf_sysutil_bind(listen_sock, p_sockaddr);
vsf_sysutil_free(p_sockaddr);
if (vsf_sysutil_retval_is_error(retval))
{
die("could not bind listening IPv6 socket");
}
}
vsf_sysutil_listen(listen_sock, VSFTP_LISTEN_BACKLOG);
vsf_sysutil_sockaddr_alloc(&p_accept_addr);
while (1)
{
struct vsf_client_launch child_info;
void* p_raw_addr;
int new_child;
int new_client_sock;
vsf_sysutil_unblock_sig(kVSFSysUtilSigCHLD);
vsf_sysutil_unblock_sig(kVSFSysUtilSigHUP);
new_client_sock = vsf_sysutil_accept_timeout(
listen_sock, p_accept_addr, 0);
vsf_sysutil_block_sig(kVSFSysUtilSigCHLD);
vsf_sysutil_block_sig(kVSFSysUtilSigHUP);
if (vsf_sysutil_retval_is_error(new_client_sock))
{
continue;
}
++s_children;
child_info.num_children = s_children;
child_info.num_this_ip = 0;
p_raw_addr = vsf_sysutil_sockaddr_get_raw_addr(p_accept_addr);
child_info.num_this_ip = handle_ip_count(p_raw_addr);
new_child = vsf_sysutil_fork_failok();
if (new_child != 0)
{
/* Parent context */
vsf_sysutil_close(new_client_sock);
if (new_child > 0)
{
hash_add_entry(s_p_pid_ip_hash, (void*)&new_child, p_raw_addr);
}
else
{
/* fork() failed, clear up! */
--s_children;
drop_ip_count(p_raw_addr);
}
/* Fall through to while() loop and accept() again */
}
else
{
/* Child context */
vsf_sysutil_close(listen_sock);
prepare_child(new_client_sock);
/* By returning here we "launch" the child process with the same
* contract as xinetd would provide.
*/
return child_info;
}
}
}
int main(void)
{
daemon(1, 0);
parseconf_load_file(MINIFTPD_CONF);
if (getuid() != 0)
{
fprintf(stderr, "must be started by root.\n");
exit(EXIT_FAILURE);
}
int listenfd = tcp_server(tunable_listen_address, tunable_listen_port);
int conn;
session_t sess =
{
//控制连接
0, -1, "", "", "",
// ftp协议进程与nobody进程通信
-1, -1,
//限速
0, 0, 0, 0,
// 数据连接
NULL, -1, -1, 0,
// ftp协议控制
0, 0, NULL, 0,
//客户端连接数控制
0, 0
};
p_sess = &sess;
sess.upload_speed_max = tunable_upload_max_rate;
sess.download_speed_max = tunable_download_max_rate;
signal(SIGCHLD, handle_sigchld);
struct sockaddr_in peeraddr;
s_ip_count_hash = hash_alloc(256, hash_func);
s_pid_ip_hash = hash_alloc(256, hash_func);
while(1)
{
if ((conn = accept_timeout(listenfd, &peeraddr, 0)) < 0)
ERR_EXIT("accept_timeout");
unsigned int ip = (unsigned int)peeraddr.sin_addr.s_addr;
sess.num_this_ip = handle_ip_count(&ip);
++cur_childrens;
sess.num_clients = cur_childrens;
pid_t pid = fork();
if (pid == -1)
{
--cur_childrens;
ERR_EXIT("fork");
}
if (pid == 0)
{
sess.ctrl_fd = conn;
close(listenfd);
check_clients_limit(&sess);
signal(SIGCHLD, SIG_IGN);
begin_session(&sess);
}
else if (pid > 0)
{
hash_add_entry(s_pid_ip_hash, &pid, sizeof(pid), &ip, sizeof(unsigned int));
close(conn);
}
}
hash_free(s_ip_count_hash);
hash_free(s_pid_ip_hash);
return 0;
}
int main()
{
stu_t stu_arr[]={
{"1","A",20},
{"2","B",21},
{"3","C",22}
};
hash_t *hash=hash_alloc(256,hash_function);
int size = sizeof(stu_arr)/sizeof(stu_arr[0]);
/*用字符串作为关键码
int i=0;
for(;i<size;++i)
{
hash_add_entry(hash,stu_arr[i].num,strlen(stu_arr[i].num),&stu_arr[i],sizeof(stu_arr[i]));
}
stu_t *s = (stu_t*)hash_lookuo_enty(hash,"1",1);
if(s != NULL)
{
printf("%s %s %d\n",s->num,s->name,s->age);
}
else
{
printf("not found\n");
}
hash_free_entry(hash,"1",1);
s = (stu_t*)hash_lookuo_enty(hash,"1",1);
if(s != NULL)
{
printf("%s %s %d\n",s->num,s->name,s->age);
}
else
{
printf("not found\n");
}
*/
//用年龄作为关键码 (用整数作为关键码)
int i=0;
for(;i<size;++i)
{
hash_add_entry(hash,&stu_arr[i].age,sizeof(stu_arr[i].age),&stu_arr[i],sizeof(stu_arr[i]));
}
int key=20;
stu_t *s = (stu_t*)hash_lookuo_enty(hash,&key,4);
if(s != NULL)
{
printf("%s %s %d\n",s->num,s->name,s->age);
}
else
{
printf("not found\n");
}
hash_free_entry(hash,&key,4);
s = (stu_t*)hash_lookuo_enty(hash,&key,4);
if(s != NULL)
{
printf("%s %s %d\n",s->num,s->name,s->age);
}
else
{
printf("not found\n");
}
hash_dealloc(hash,256);
return 0;
}
void add_pid_ip_to_hash(pid_t pid, uint32_t ip)
{
hash_add_entry(pid_to_ip, &pid, sizeof(pid), &ip, sizeof(ip));
}