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/* SPDX-License-Identifier: GPL-2.0 */
#include <stdlib.h>
#include <errno.h>
#include <stdint.h>
#include <limits.h>
#include <arpa/inet.h>
#include <string.h>
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <inttypes.h>
#include <stdarg.h>
#include "utils.h"
unsigned debug_mask = 0;
const char *ansi_red = "";
const char *ansi_green = "";
const char *ansi_yellow = "";
const char *ansi_blue = "";
const char *ansi_magenta = "";
const char *ansi_grey = "";
const char *ansi_normal = "";
void enable_colors()
{
ansi_red = ANSI_RED;
ansi_green = ANSI_GREEN;
ansi_yellow = ANSI_YELLOW;
ansi_blue = ANSI_BLUE;
ansi_magenta = ANSI_MAGENTA;
ansi_grey = ANSI_GREY;
ansi_normal = ANSI_NORMAL;
}
void free_password(char **password)
{
if (!password || !*password)
return;
explicit_bzero(*password, strlen(*password));
xfree(*password);
*password = NULL;
}
void socket_set_low_latency(int sfd, bool keepalive, bool iptos, bool nodelay)
{
int option;
assert_return(sfd >= 0);
/* Probably not necessary, but can't hurt */
if (keepalive) {
option = true;
if (setsockopt(sfd, SOL_SOCKET, SO_KEEPALIVE, &option,
sizeof(option)) < 0)
error("setsockopt: %m");
}
/* Doubtful if it has much effect, but can't hurt */
if (iptos) {
option = IPTOS_LOWDELAY;
if (setsockopt(sfd, IPPROTO_IP, IP_TOS, &option,
sizeof(option)) < 0)
error("setsockopt: %m");
}
/* Nagle's algorithm is a poor fit for gaming */
if (nodelay) {
option = true;
if (setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, &option,
sizeof(option)) < 0)
error("setsockopt: %m");
}
}
uint16_t saddr_port(struct saddr *saddr)
{
// assert_return(saddr, 0);
switch (saddr->st.ss_family) {
case AF_INET:
return ntohs(saddr->in4.sin_port);
case AF_INET6:
return ntohs(saddr->in6.sin6_port);
default:
return 0;
}
}
char *saddr_addr(struct saddr *saddr, char *buf, size_t len)
{
// assert_return(saddr && buf && len > 0, NULL);
switch (saddr->st.ss_family) {
case AF_INET:
if (inet_ntop(saddr->in4.sin_family, &saddr->in4.sin_addr, buf,
len))
return buf;
break;
case AF_INET6:
if (inet_ntop(saddr->in6.sin6_family, &saddr->in6.sin6_addr,
buf, len))
return buf;
break;
default:
break;
}
snprintf(buf, len, "<unknown>");
return buf;
}
void saddr_set_ipv4(struct saddr *saddr, in_addr_t ip, in_port_t port)
{
// assert_return(saddr);
memset(&saddr->in4, 0, sizeof(saddr->in4));
saddr->in4.sin_family = AF_INET;
saddr->in4.sin_port = port;
saddr->in4.sin_addr.s_addr = ip;
saddr->addrlen = sizeof(saddr->in4);
saddr_set_addrstr(saddr);
}
void saddr_set_ipv6(struct saddr *saddr, const struct in6_addr *ip,
in_port_t port)
{
// assert_return(saddr && ip);
memset(&saddr->in6, 0, sizeof(saddr->in6));
saddr->in6.sin6_family = AF_INET6;
saddr->in6.sin6_port = port;
if (ip)
saddr->in6.sin6_addr = *ip;
saddr->addrlen = sizeof(saddr->in6);
saddr_set_addrstr(saddr);
}
void saddr_any_to_loopback(struct saddr *saddr)
{
switch (saddr->st.ss_family) {
case AF_INET:
if (saddr->in4.sin_addr.s_addr != htonl(INADDR_ANY))
return;
saddr->in4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
break;
case AF_INET6:
if (memcmp(&saddr->in6.sin6_addr, &in6addr_any,
sizeof(in6addr_any)))
return;
saddr->in6.sin6_addr = in6addr_loopback;
break;
default:
return;
}
saddr_set_addrstr(saddr);
}
void saddr_set_addrstr(struct saddr *saddr)
{
// assert_return(saddr);
char abuf[ADDRSTRLEN];
switch (saddr->st.ss_family) {
case AF_INET:
snprintf(saddr->addrstr, sizeof(saddr->addrstr),
"AF_INET4 %s %" PRIu16,
saddr_addr(saddr, abuf, sizeof(abuf)),
saddr_port(saddr));
break;
case AF_INET6:
snprintf(saddr->addrstr, sizeof(saddr->addrstr),
"AF_INET6 %s %" PRIu16,
saddr_addr(saddr, abuf, sizeof(abuf)),
saddr_port(saddr));
break;
default:
snprintf(saddr->addrstr, sizeof(saddr->addrstr), "AF_UNKNOWN");
break;
}
}
int strtou16_strict(const char *str, uint16_t *result)
{
char *end;
long val;
if (empty_str(str))
return -EINVAL;
errno = 0;
val = strtol(str, &end, 10);
if (errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
return -EINVAL;
if (errno != 0 && val == 0)
return -EINVAL;
if (end == str)
return -EINVAL;
if (*end != '\0')
return -EINVAL;
if (val < 1 || val > UINT16_MAX)
return -EINVAL;
if (result)
*result = val;
return 0;
}
char *xsprintf(size_t *rlen, const char *fmt, ...)
{
va_list ap;
int len;
char *str;
va_start(ap, fmt);
len = vsnprintf(NULL, 0, fmt, ap);
va_end(ap);
if (len < 0)
return NULL;
len++;
str = zmalloc(len);
if (!str)
return NULL;
va_start(ap, fmt);
len = vsnprintf(str, len, fmt, ap);
va_end(ap);
if (len < 0) {
xfree(str);
return NULL;
}
if (rlen)
*rlen = len;
return str;
}
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