unsigned short * get_tcp_svcs(int * num)
{
struct nessus_service * ns = NULL;
int len, num_svc;
unsigned short * ret;
int fd, i;
struct stat st;
if ((fd = open(NESSUS_SERVICES_TCP, O_RDONLY)) >= 0)
{
if (fstat(fd, &st) < 0)
perror("fstat");
else
{
len = st.st_size;
num_svc = len / sizeof(struct nessus_service);
/*if ((ns = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0))== MAP_FAILED ) {
perror("mmap");
ns = NULL;
}*/
}
}
if (ns == NULL)
{
struct servent * ent;
int n = 0;
__try {
ret = emalloc(sizeof(unsigned short) * 65537);
endservent();
while ( (ent = getservent()) != NULL )
{
if(strcmp(ent->s_proto, "tcp") == 0 && ntohs(ent->s_port))
{
ret[n++] = ntohs(ent->s_port);
if(n >= 65537)break;
}
}
endservent();
if(num != NULL)
*num = n;
ret = erealloc(ret, sizeof(unsigned short) * (n+1));
ret[n] = 0;
}
__except (EXCEPTION_EXECUTE_HANDLER) {
fprintf(stderr, "get_tcp_svcs() causes an exception.\n");
}
return ret;
}
else
{
static int
read_services(void)
{
struct servent *se;
struct service *item;
setservent(1);
while((se=getservent())) {
/* Allocate a service entry. */
item = (struct service *) malloc(sizeof(struct service));
if (item == NULL) perror("netstat");
item->name = strdup(se->s_name);
item->number = se->s_port;
/* Fill it in. */
if (! strcmp(se->s_proto, "tcp")) {
add2list(&tcp_name,item);
} else if (! strcmp(se->s_proto, "udp")) {
add2list(&udp_name,item);
} else if (! strcmp(se->s_proto, "raw")) {
add2list(&raw_name,item);
}
}
endservent();
return(0);
}
struct servent * getservbyport(int port,
const char *proto) {
struct servent *se;
if (proto == NULL) {
return NULL;
}
setservent(1);
port = htons((unsigned short)port);
while ((se = getservent()) != NULL) {
/* same protocol? */
if (strcmp(proto, se->s_proto) != 0) {
continue; /* not same. try again */
}
/* same port? */
if (se->s_port == port) {
break;
}
/* nope. try again */
}
endservent();
return se;
}
static int
services(int argc, char *argv[])
{
struct servent *se;
int i, rv = RV_OK;
setservent(1);
if (argc == 2) {
while ((se = getservent()) != NULL)
SERVICESPRINT;
} else {
for (i = 2; i < argc; i++) {
const char *err;
long long id;
char *proto = strchr(argv[i], '/');
if (proto != NULL)
*proto++ = '\0';
id = strtonum(argv[i], 0, UINT_MAX, &err);
if (!err)
se = getservbyport(htons((u_short)id), proto);
else
se = getservbyname(argv[i], proto);
if (se != NULL)
SERVICESPRINT;
else {
rv = RV_NOTFOUND;
break;
}
}
}
endservent();
return rv;
}
struct servent *
getservbyport(
int port,
const char *proto)
{
register struct servent *p;
#ifdef YP
extern int ___getservbyport_yp;
extern char *___getservbyproto_yp;
___getservbyport_yp = port;
___getservbyproto_yp = (char *)proto;
#endif
setservent(_serv_stayopen);
while ( (p = getservent()) ) {
if (p->s_port != port)
continue;
if (proto == 0 || strcmp(p->s_proto, proto) == 0)
break;
}
if (!_serv_stayopen)
endservent();
#ifdef YP
___getservbyport_yp = 0;
___getservbyproto_yp = NULL;
#endif
return (p);
}
void
ServiceList::assignSystemServices(void)
{
struct servent *entry;
clearServiceList(true);
/* Open /etc/services */
entry = getservent();
while (entry != NULL) {
/* Only show protocol tcp and udp. */
wxString prot = wxString::From8BitData(entry->s_proto);
if (prot == wxT("tcp") || prot == wxT("udp")) {
Service *service = new Service(
wxString::From8BitData(entry->s_name),
entry->s_port,
(prot == wxT("tcp") ? Service::TCP : Service::UDP),
false);
addService(service);
}
entry = getservent();
}
/* Close /etc/services */
endservent();
sizeChangeEvent(serviceList_.size());
}
/* libc_hidden_proto(getservbyname_r) */
int getservbyname_r(const char *name, const char *proto,
struct servent * result_buf, char * buf, size_t buflen,
struct servent ** result)
{
register char **cp;
int ret;
__UCLIBC_MUTEX_LOCK(mylock);
setservent(serv_stayopen);
while (!(ret=getservent_r(result_buf, buf, buflen, result))) {
if (strcmp(name, result_buf->s_name) == 0)
goto gotname;
for (cp = result_buf->s_aliases; *cp; cp++)
if (strcmp(name, *cp) == 0)
goto gotname;
continue;
gotname:
if (proto == 0 || strcmp(result_buf->s_proto, proto) == 0)
break;
}
if (!serv_stayopen)
endservent();
__UCLIBC_MUTEX_UNLOCK(mylock);
return *result?0:ret;
}
endservent_r()
#endif
{
#ifdef SERV_R_ENT_UNUSED
SERV_R_ENT_UNUSED;
#endif
endservent();
SERV_R_END_RESULT(SERV_R_OK);
}
main()
{
setnetent(1);
struct netent *net;
while((net=getnetent())!=NULL)
{
printf("%s,%d,%u\n",net->n_name,net->n_addrtype,net->n_net);
}
endservent();
}
pid_t
ypldap_dns(int pipe_ntp[2], struct passwd *pw)
{
pid_t pid;
struct event ev_sigint;
struct event ev_sigterm;
struct event ev_sighup;
struct env env;
switch (pid = fork()) {
case -1:
fatal("cannot fork");
break;
case 0:
break;
default:
return (pid);
}
setproctitle("dns engine");
close(pipe_ntp[0]);
if (setgroups(1, &pw->pw_gid) ||
setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
fatal("can't drop privileges");
endservent();
if (pledge("stdio dns", NULL) == -1)
fatal("pledge");
event_init();
signal_set(&ev_sigint, SIGINT, dns_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, dns_sig_handler, NULL);
signal_set(&ev_sighup, SIGHUP, dns_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal_add(&ev_sighup, NULL);
if ((env.sc_iev = calloc(1, sizeof(*env.sc_iev))) == NULL)
fatal(NULL);
env.sc_iev->events = EV_READ;
env.sc_iev->data = &env;
imsg_init(&env.sc_iev->ibuf, pipe_ntp[1]);
env.sc_iev->handler = dns_dispatch_imsg;
event_set(&env.sc_iev->ev, env.sc_iev->ibuf.fd, env.sc_iev->events,
env.sc_iev->handler, &env);
event_add(&env.sc_iev->ev, NULL);
event_dispatch();
dns_shutdown();
return (0);
}
int
getport(char *port)
{
struct servent *sv;
int n;
const char *errstr;
sv = getservbyname(port, "tcp");
if (sv == NULL) {
n = strtonum(port, 1, UINT16_MAX, &errstr);
if (errstr != NULL) {
endservent();
return (-1);
}
} else
n = ntohs(sv->s_port);
endservent();
return (n);
}
/* The setservent() function opens and rewinds the `/etc/services' file.
This file can be set from outside with an environment variable specifying
the file name. */
void
setservent (int stayopen)
{
char *file = NULL;
endservent ();
if ((file = getenv (ENVIRON_ETC_SERVICES)) != NULL)
strcpy (scm_i_servent.file, file);
else if ((file = scm_i_socket_filename (FILE_ETC_SERVICES)) != NULL)
strcpy (scm_i_servent.file, file);
scm_i_servent.fd = fopen (scm_i_servent.file, "rt");
}
/* Services are represented by the port number portion of the address. Each
* service is offered on a unique, well-known port number. We can map a
* service name to a port number with getservbyname(), map a port number to
* a service name with getservbyport(), or scan the services database
* sequentially with getservent().
*
* #include <netdb.h>
* void endservent(void);
* struct servent *getservbyname(const char *name, const char *proto);
* struct servent *getservbyport(int port, const char *proto);
* struct servent *getservent(void):
* void setservent(int stayopen);
*
* These functions shall retrieve information about network services.
*
* The setservent() function shall open a connection to the database, and
* set the next entry to the first entry. If the stayopen argument is non-
* zero, the net database shall not be closed after each call to the
* getservent() function (either directly, or indirectly through one of the
* other getserv*() functions).
*
* The getservent() function shall read the next entry of the database,
* opending and closing a connection to the database as necessary.
*
* The getservbyname() function shall search the database from the beginning
* and find the first entry for which the service name specified by name
* matches the s_name member and the protocol name specified by proto
* matches the s_proto mumber, opening and closing a connection to the
* database necessary. If proto is a null pointer, any value of the s_proto
* member shall be matched. 当 proto 是NULL指针时,将匹配任意的协议名,但是
* getservbyname()函数还是只返回第一项匹配的指针,不会返回多项.这里的"匹配
* 任意协议名"应该是指不判断协议名.
*
* The getservbyport() function shall search the database from the beginning
* and find the first entry for which the port specified by port matches the
* s_port member and the protocol name specified by proto matches the
* s_proto member, opening and closing a connection to the database as
* necessary. If proto is a null pointer, any value of the s_proto member
* shall be matched. The port argument shall be a value obtained by
* converting a uint16_t in network byte order to int. 即 port 参数的值
* 是网络字节序的,经过测试,要调用htons()函数来转换得到网络字节序的值,不能
* 使用htonl()函数, htonl(80) 得到的值是0x50000000, htons(80) 得到的值是
* 0x5000, 两者的结果是不同的.
*
* The endservent() function shall close the database, releasing any open
* file descriptor.
*
* These functions need not be thread-safe.
*
* Upon successful completion, getservbyname(), getservbyport(), and
* getservent() return a pointer to a servent structure if the requested
* entry was found, and a null pointer if the end of the database was
* reached or the requested entry was not found. Otherwise, a null pointer
* is returned. No errors are defined.
*
* Linux 中, struct servent 结构体定义如下:
* struct servent {
* char *s_name; // official service name
* char **s_aliases; // alias list, terminated by NULL
* int s_port; // The port number for the service given
* // in network byte order
* char *s_proto; // protocol to use with this service
* };
*
* 查看执行结果,发现输出的服务名和 /etc/services 文件里面的服务名是一样的.
*/
int main(void)
{
struct servent *serv;
int i, port;
while ((serv = getservent()) != NULL)
printservent(serv);
endservent();
printf("========= getservbyname: name --> echo, proto --> tcp\n");
if ((serv = getservbyname("echo", "tcp")) != NULL)
printservent(serv);
/* 虽然 echo 服务可以使用tcp协议,也可以使用udp协议,但是下面的语句还是
* 只会返回其中一项的值,指定getservbyname()函数的第二个参数为NULL,并
* 不会两个echo服务 (使用tcp协议的echo和使用udp协议的echo).
*/
printf("========= getservbyname: name --> echo, proto --> NULL\n");
if ((serv = getservbyname("echo", NULL)) != NULL)
printservent(serv);
printf("========= getservbyprot: port --> 80, proto --> tcp\n");
port = htons(80);
printf("port: host 80 --> network is: %#x\n", port);
if ((serv = getservbyport(port, "tcp")) != NULL)
printservent(serv);
printf("========= setservent() =========\n");
if ((serv = getservent()) != NULL)
printservent(serv);
setservent(0);
printf("========= after setservent() =========\n");
for (i = 0; i < 2; ++i)
if ((serv = getservent()) != NULL)
printservent(serv);
endservent();
return 0;
}
/*
* getservbyname() - looks up a service by its name
*/
struct servent *getservbyname(const char *servname, const char *protname)
{
struct servent *s = NULL;
int found = false;
ncbi_ClearErrno();
if(servname == NULL){
ncbi_SetErrno(EINVAL);
goto abort;
}
if( (strcmp( protname, "tcp") != 0) && ( strcmp( protname, "udp") != 0)){
ncbi_SetErrno(EINVAL);
goto abort;
}
/* Make sure the database is closed */
endservent();
while(!found){
s = getservent(); // get the next entry
if(s == NULL){
break; // did we reach the end? Guess we return NULL
}
// Do we have a match on the name?
if(strcmp(s->s_name, servname) == 0){
// If protocol is "any" or an exact match, then we're done
if( (protname == NULL) || (strcmp(s->s_proto, protname) == 0)){
found = true;
}
}
}
abort:
endservent();
return(s);
}
/*
* getservbyport() - looks up a service by its port number
*/
struct servent *getservbyport(int port, const char *protname)
{
struct servent *s = NULL;
int found = false;
ncbi_ClearErrno();
if((strcmp(protname, "tcp") != 0) && (strcmp(protname, "udp") != 0))
{
ncbi_SetErrno(EINVAL);
goto abort;
}
/* Make sure the database is closed */
endservent();
while(!found)
{
s = getservent(); /* get the next entry */
/* did we reach the end? Guess we return NULL */
if(s == NULL)
break;
/* Do we have a match on the port? */
if(s->s_port == port)
{
if(protname == NULL)
found = true; /* any protocol is okay */
else
if(strcmp(s->s_proto, protname) == 0)
found = true; /* protocol matches */
}
}
abort:
endservent();
return(s);
}
int main (void)
{
struct servent service;
struct servent * retour;
char buffer [256];
setservent(0);
while(getservent_r(& service, buffer, 256, & retour) == 0)
fprintf(stdout, "%s ", service.s_name);
endservent();
fprintf(stdout, "\n");
return EXIT_SUCCESS;
}
const char *starttls_proto_to_service(const char *app_proto)
{
struct servent *s;
CANON_SERVICE(app_proto);
s = getservbyname(app_proto, NULL);
if (s != NULL) {
return s->s_name;
}
endservent();
return "443";
}
int tx_open(char *address)
{
close(_tx_server);
address = strdup(address); /* I want to be able to modify it */
char *p = strrchr(address, ':');
if (!p)
{ /* AF_UNIX address */
struct sockaddr_un sun;
sun.sun_family = AF_UNIX;
strncpy(sun.sun_path, address, sizeof sun.sun_path);
_tx_server = socket(AF_UNIX, SOCK_STREAM, 0);
if (_tx_server != -1 && connect(_tx_server, (struct sockaddr *)&sun, sizeof sun) == -1)
{
close(_tx_server);
_tx_server = -1;
}
}
else
{ /* AF_INET address */
struct sockaddr_in sin;
_tx_server = -1; // cheap error handling
bzero(&sin, sizeof(sin));
*p++ = 0;
struct hostent *host = gethostbyname(address);
if (!host) goto fail;
bcopy(host->h_addr, &sin.sin_addr, host->h_length);
sin.sin_family = host->h_addrtype;
struct servent *service = getservbyname(p, "tcp");
sin.sin_port = service? service->s_port: htons(atoi(p));
if (!ntohs(sin.sin_port)) goto fail;
_tx_server = socket(AF_INET, SOCK_STREAM, 0);
if (_tx_server != -1 && connect(_tx_server, (struct sockaddr *)&sin, sizeof sin) == -1)
{
close(_tx_server);
_tx_server = -1;
}
fail:
endhostent();
endservent();
}
free(address);
return (_tx_server == -1) ? TX_FAIL : TX_OK;
}
static int
servent_fill_test_data(struct servent_test_data *td)
{
struct servent *serv;
setservent(1);
while ((serv = getservent()) != NULL) {
if (servent_test_correctness(serv, NULL) == 0)
TEST_DATA_APPEND(servent, td, serv);
else
return (-1);
}
endservent();
return (0);
}
struct servent *
getservbyport(int port, const char *proto)
{
register struct servent *p;
setservent(_serv_stayopen);
while (p = getservent()) {
if (p->s_port != port)
continue;
if (proto == 0 || strcmp(p->s_proto, proto) == 0)
break;
}
if (!_serv_stayopen)
endservent();
return (p);
}
int
starttls_proto_to_port(const char *app_proto)
{
struct servent *s;
CANON_SERVICE(app_proto);
s = getservbyname(app_proto, NULL);
if (s != NULL) {
return ntohs(s->s_port);
}
endservent();
return 443;
}
/** desetup parse */
void
zonec_desetup_parser(void)
{
if(parser) {
endservent();
endprotoent();
region_destroy(parser->rr_region);
/* removed when parser->region(=db->region) is destroyed:
* region_recycle(parser->region, (void*)error_dname, 1);
* region_recycle(parser->region, (void*)error_domain, 1); */
/* clear memory for exit, but this is not portable to
* other versions of lex. yylex_destroy(); */
#ifdef MEMCLEAN /* OS collects memory pages */
yylex_destroy();
#endif
}
}
int ttd_bind(char *hostname, int port, ttd_server server_type,
ttd_conn *conn)
{
ttd_conn ttd;
struct hostent *hp;
struct servent *sp;
ttd = (ttd_conn) malloc( sizeof( *ttd ) );
if (hostname == NULL)
hostname = "localhost";
hp = gethostbyname( hostname );
if (hp == 0)
return TTD_UnknownHostnameRC;
ttd->addr.sin_family = hp->h_addrtype;
bcopy( (char *) hp->h_addr, (char *) &ttd->addr.sin_addr, hp->h_length );
endhostent();
if (port != 0)
ttd->addr.sin_port = htons( port );
else {
sp = getservbyname( "ttd", "udp" );
if (sp != 0)
ttd->addr.sin_port = sp->s_port;
else
ttd->addr.sin_port = htons( DEFAULTPORT );
}
endservent();
ttd->socket = socket( AF_INET, SOCK_DGRAM, 0 );
if (ttd->socket < 0)
return TTD_UnixErrorRC;
if (connect( ttd->socket, (struct sockaddr *) &(ttd->addr),
sizeof( struct sockaddr_in ) ) < 0)
return TTD_UnixErrorRC;
ttd->server = server_type;
ttd->seq = time( (long *) 0 ) * 2;
*conn = ttd;
return TTD_SuccessRC;
}
int main (void) {
struct servent *pht;
char *pct;
int i;
setservent (1);
while ((pht = getservent ()) != NULL) {
printf ("Официальное имя сервиса: %s\n", pht->s_name);
printf ("Альтернативные имена:\n");
for (i = 0; (pct = pht->s_aliases [i]) != NULL; i++) {
printf (" %s\n", pct);
}
printf ("Номер порта: %d\n", ntohs ((in_port_t) pht->s_port));
printf ("Имя протокола: %s\n\n", pht->s_proto);
}
if ((pht = getservbyport (htons ((in_port_t) 21), "udp")) != NULL) {
printf ("Официальное имя сервиса: %s\n", pht->s_name);
printf ("Альтернативные имена:\n");
for (i = 0; (pct = pht->s_aliases [i]) != NULL; i++) {
printf (" %s\n", pct);
}
printf ("Номер порта: %d\n", ntohs ((in_port_t) pht->s_port));
printf ("Имя протокола: %s\n\n", pht->s_proto);
} else {
perror ("GETSERVBYPORT");
}
if ((pht = getservbyport (htons ((in_port_t) 21), (char *) NULL)) != NULL) {
printf ("Официальное имя сервиса: %s\n", pht->s_name);
printf ("Альтернативные имена:\n");
for (i = 0; (pct = pht->s_aliases [i]) != NULL; i++) {
printf (" %s\n", pct);
}
printf ("Номер порта: %d\n", ntohs ((in_port_t) pht->s_port));
printf ("Имя протокола: %s\n\n", pht->s_proto);
} else {
perror ("GETSERVBYPORT");
}
endservent ();
return 0;
}
static int findHTTPhost(struct sockaddr_in *addr, char *hostname, int port) {
struct servent *servent;
int ret;
pthread_mutex_lock(&host_lock);
memset(addr,0,sizeof(*addr));
addr->sin_family = AF_INET;
if ( port>=0 )
addr->sin_port = htons(port);
else if (( servent = getservbyname("http","tcp"))!=NULL )
addr->sin_port = servent->s_port; /* Already in server byteorder */
else
addr->sin_port = htons(80);
endservent();
ret = findhost(addr,hostname);
pthread_mutex_unlock(&host_lock);
return( ret );
}
/* libc_hidden_proto(getservbyport_r) */
int getservbyport_r(int port, const char *proto,
struct servent * result_buf, char * buf,
size_t buflen, struct servent ** result)
{
int ret;
__UCLIBC_MUTEX_LOCK(mylock);
setservent(serv_stayopen);
while (!(ret=getservent_r(result_buf, buf, buflen, result))) {
if (result_buf->s_port != port)
continue;
if (proto == 0 || strcmp(result_buf->s_proto, proto) == 0)
break;
}
if (!serv_stayopen)
endservent();
__UCLIBC_MUTEX_UNLOCK(mylock);
return *result?0:ret;
}
void findservice(int port) {
struct servent *sep;
char **cpp;
int hbo,found=0;
setservent(1);
while((sep=getservent())!=NULL) {
hbo=ntohs(sep->s_port);
if (hbo==port) {
printf("%d/%s\t%s",hbo,sep->s_proto,sep->s_name);
for(cpp=sep->s_aliases;*cpp;++cpp)
printf(" %s",*cpp);
putchar('\n');
found=1;
}
}
endservent();
if (!found)
fprintf(stderr,"%s: port %d has no name on this system.\n",progname,port);
} /* void findservice(int port) */
static void
test_services (void)
{
struct servent *sptr;
sptr = getservbyname ("domain", "tcp");
output_servent ("getservbyname (\"domain\", \"tcp\")", sptr);
sptr = getservbyname ("domain", "udp");
output_servent ("getservbyname (\"domain\", \"udp\")", sptr);
sptr = getservbyname ("domain", NULL);
output_servent ("getservbyname (\"domain\", NULL)", sptr);
sptr = getservbyname ("not-existant", NULL);
output_servent ("getservbyname (\"not-existant\", NULL)", sptr);
/* This shouldn't return anything. */
sptr = getservbyname ("", "");
output_servent ("getservbyname (\"\", \"\")", sptr);
sptr = getservbyname ("", "tcp");
output_servent ("getservbyname (\"\", \"tcp\")", sptr);
sptr = getservbyport (htons(53), "tcp");
output_servent ("getservbyport (htons(53), \"tcp\")", sptr);
sptr = getservbyport (htons(53), NULL);
output_servent ("getservbyport (htons(53), NULL)", sptr);
sptr = getservbyport (htons(1), "udp"); /* shouldn't exist */
output_servent ("getservbyport (htons(1), \"udp\")", sptr);
setservent (0);
do
{
sptr = getservent ();
output_servent ("getservent ()", sptr);
}
while (sptr != NULL);
endservent ();
}
/*
parse a IP:port pair
*/
int ctdb_parse_address(struct ctdb_context *ctdb,
TALLOC_CTX *mem_ctx, const char *str,
struct ctdb_address *address)
{
struct servent *se;
setservent(0);
se = getservbyname("ctdb", "tcp");
endservent();
address->address = talloc_strdup(mem_ctx, str);
CTDB_NO_MEMORY(ctdb, address->address);
if (se == NULL) {
address->port = CTDB_PORT;
} else {
address->port = ntohs(se->s_port);
}
return 0;
}
/*
* services
*/
static int
services(int argc, char *argv[])
{
struct servent *se;
unsigned long id;
char *proto;
int i, rv;
assert(argc > 1);
assert(argv != NULL);
#define SERVICESPRINT printfmtstrings(se->s_aliases, " ", " ", \
"%-16s %5d/%s", \
se->s_name, ntohs(se->s_port), se->s_proto)
setservent(1);
rv = RV_OK;
if (argc == 2) {
while ((se = getservent()) != NULL)
SERVICESPRINT;
} else {
for (i = 2; i < argc; i++) {
proto = strchr(argv[i], '/');
if (proto != NULL)
*proto++ = '\0';
if (parsenum(argv[i], &id))
se = getservbyport(htons((u_short)id), proto);
else
se = getservbyname(argv[i], proto);
if (se != NULL)
SERVICESPRINT;
else {
rv = RV_NOTFOUND;
break;
}
}
}
endservent();
return rv;
}