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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "socktool.h"
#include "xwrap.h"
#include <arpa/inet.h>
#include <errno.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdbool.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
typedef int (*SockNameGetter) (int, struct sockaddr*, socklen_t*);
static char* ras_socktool_get_name (int sockfd, SockNameGetter getter) {
struct sockaddr_storage sock;
socklen_t socklen = sizeof (sock);
memset (&sock, 0, socklen);
if ((*getter)(sockfd, SOCKADDR (&sock), &socklen) < 0) {
return xstrdup ("invalid socket");
}
int domain = sock.ss_family;
if (domain == AF_UNIX) {
return xstrdup ("local process");
}
socklen_t ipstrlen;
void* ipnet;
char* ipstr;
if (domain == AF_INET) {
ipstrlen = INET_ADDRSTRLEN;
ipnet = &(SOCKADDR_IN (&sock)->sin_addr);
} else {
ipstrlen = INET6_ADDRSTRLEN;
ipnet = &(SOCKADDR_IN6 (&sock)->sin6_addr);
}
ipstr = xmalloc (ipstrlen);
if (inet_ntop (domain, ipnet, ipstr, ipstrlen) == NULL) {
free (ipstr);
return xstrdup ("unknown address");
}
return ipstr;
}
char* ras_socktool_get_sockname (int sockfd) {
return ras_socktool_get_name (sockfd, getsockname);
}
char* ras_socktool_get_peername (int sockfd) {
return ras_socktool_get_name (sockfd, getpeername);
}
void ras_socktool_buffer_clear (RasBuffer* buf, bool initial) {
buf->buf_start = 0;
buf->buf_len = 0;
if (!initial) {
free (buf->buf_line);
}
buf->buf_line = NULL;
buf->buf_line_len = 0;
buf->buf_error = false;
buf->buf_eof = false;
}
void ras_socktool_buffer_free_line (RasBuffer* buf) {
free (buf->buf_line);
buf->buf_line = NULL;
buf->buf_line_len = 0;
}
char* ras_socktool_getline (int sockfd, RasBuffer* buf, int delim, int* len) {
if (buf->buf_error || buf->buf_eof) {
return NULL;
}
if (buf->buf_len == 0) {
int rval = read (sockfd, buf->buf, RAS_BUFFER_SIZE);
if (rval < 0) {
if (errno != EAGAIN && errno != EINTR) {
buf->buf_error = true;
}
return NULL;
}
if (rval == 0) {
buf->buf_eof = true;
return NULL;
}
buf->buf_start = 0;
buf->buf_len = rval;
}
int i;
for (i = 0; i < buf->buf_len; i++) {
if (buf->buf[buf->buf_start + i] == delim) {
break;
}
}
int buf_line_start = buf->buf_line_len;
buf->buf_line_len += i;
buf->buf_line = xrealloc (buf->buf_line, buf->buf_line_len + 1);
memcpy (buf->buf_line + buf_line_start, buf->buf + buf->buf_start, i);
buf->buf_line[buf->buf_line_len] = '\0';
/* remove CR if delim is LF and delim is found */
if (i < buf->buf_len && delim == '\n' && buf->buf_line_len - 1 >= 0 &&
buf->buf_line[buf->buf_line_len - 1] == '\r') {
buf->buf_line[buf->buf_line_len - 1] = '\0';
buf->buf_line_len--;
}
int buf_len_saved = buf->buf_len;
buf->buf_start += i + 1;
buf->buf_len -= i + 1;
if (buf->buf_len <= 0) {
buf->buf_start = 0;
buf->buf_len = 0;
}
if (i < buf_len_saved) {
/* delim is found */
char* newstr = buf->buf_line;
if (len != NULL) {
*len = buf->buf_line_len;
}
buf->buf_line = NULL;
buf->buf_line_len = 0;
return newstr;
}
return NULL;
}
int ras_socktool_write_string (int sockfd, const char* str, size_t size) {
size_t wtn = 0;
size_t rem = size;
if (size <= 0) {
size = strlen (str);
}
while (rem > 0) {
wtn = write (sockfd, str, rem);
if (wtn < 0) {
if (errno != EINTR && errno != EAGAIN) {
break;
}
continue;
}
str += wtn;
rem -= wtn;
}
rem = rem > 0 ? rem : 0;
return size - rem;
}
void ras_socktool_reset_signals (void) {
const int must_reset[] = { SIGHUP, SIGINT, SIGQUIT, SIGABRT,
SIGFPE, SIGTERM, SIGCHLD, SIGTSTP, SIGTTIN, SIGTTOU };
struct sigaction action = {
.sa_handler = SIG_DFL,
.sa_flags = 0
};
sigemptyset (&action.sa_mask);
#if defined(SIGRTMIN) && defined(SIGRTMAX)
int signal_max = xmax (SIGRTMIN, SIGRTMAX);
for (int i = 1; i < signal_max; i++) {
sigaction (i, &action, NULL);
}
#endif
for (int i = 0; i < sizeof (must_reset) / sizeof (int); i++) {
sigaction (must_reset[i], &action, NULL);
}
}
int ras_socktool_getdtablesize (void) {
#ifdef HAVE_GETDTABLESIZE
return getdtablesize ();
#else
long rval = sysconf (_SC_OPEN_MAX);
if (rval < 0) {
# ifdef _POSIX_OPEN_MAX
rval = _POSIX_OPEN_MAX
# else
rval = 20;
# endif
}
return rval;
#endif
}
void ras_socktool_close_except (int dontclose) {
int dtsize = ras_socktool_getdtablesize ();
for (int i = 0; i < dtsize; i++) {
if (i != dontclose) {
close (i);
}
}
}
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