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/*
* Copyright (C) 2006-2008 Stig Venaas <venaas@uninett.no>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include "debug.h"
#include "util.h"
char *stringcopy(const char *s, int len) {
char *r;
if (!len)
len = strlen(s);
r = malloc(len + 1);
if (!r)
debug(DBG_ERR, "stringcopy: malloc failed");
memcpy(r, s, len);
r[len] = '\0';
return r;
}
void printfchars(char *prefixfmt, char *prefix, char *charfmt, char *chars, int len) {
int i;
unsigned char *s = (unsigned char *)chars;
if (prefix)
printf(prefixfmt ? prefixfmt : "%s: ", prefix);
for (i = 0; i < len; i++)
printf(charfmt ? charfmt : "%c", s[i]);
printf("\n");
}
uint16_t port_get(struct sockaddr *sa) {
switch (sa->sa_family) {
case AF_INET:
return ntohs(((struct sockaddr_in *)sa)->sin_port);
case AF_INET6:
return ntohs(((struct sockaddr_in6 *)sa)->sin6_port);
}
return 0;
}
void port_set(struct sockaddr *sa, uint16_t port) {
switch (sa->sa_family) {
case AF_INET:
((struct sockaddr_in *)sa)->sin_port = htons(port);
break;
case AF_INET6:
((struct sockaddr_in6 *)sa)->sin6_port = htons(port);
break;
}
}
int addr_equal(struct sockaddr *a, struct sockaddr *b) {
switch (a->sa_family) {
case AF_INET:
return !memcmp(&((struct sockaddr_in*)a)->sin_addr,
&((struct sockaddr_in*)b)->sin_addr,
sizeof(struct in_addr));
case AF_INET6:
return IN6_ARE_ADDR_EQUAL(&((struct sockaddr_in6*)a)->sin6_addr,
&((struct sockaddr_in6*)b)->sin6_addr);
default:
/* Must not reach */
return 0;
}
}
struct sockaddr *addr_copy(struct sockaddr *in) {
struct sockaddr *out = NULL;
switch (in->sa_family) {
case AF_INET:
out = malloc(sizeof(struct sockaddr_in));
if (out) {
memset(out, 0, sizeof(struct sockaddr_in));
((struct sockaddr_in *)out)->sin_addr = ((struct sockaddr_in *)in)->sin_addr;
}
break;
case AF_INET6:
out = malloc(sizeof(struct sockaddr_in6));
if (out) {
memset(out, 0, sizeof(struct sockaddr_in6));
((struct sockaddr_in6 *)out)->sin6_addr = ((struct sockaddr_in6 *)in)->sin6_addr;
}
break;
}
out->sa_family = in->sa_family;
return out;
}
char *addr2string(struct sockaddr *addr) {
struct sockaddr_in6 *sa6;
struct sockaddr_in sa4;
static char addr_buf[2][INET6_ADDRSTRLEN];
static int i = 0;
i = !i;
if (addr->sa_family == AF_INET6) {
sa6 = (struct sockaddr_in6 *)addr;
if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
sa4.sin_port = sa6->sin6_port;
memcpy(&sa4.sin_addr, &sa6->sin6_addr.s6_addr[12], 4);
addr = (struct sockaddr *)&sa4;
}
}
if (getnameinfo(addr, SOCKADDRP_SIZE(addr), addr_buf[i], sizeof(addr_buf[i]),
NULL, 0, NI_NUMERICHOST)) {
debug(DBG_WARN, "getnameinfo failed");
return "getnameinfo_failed";
}
return addr_buf[i];
}
int connectport(int type, char *host, char *port) {
struct addrinfo hints, *res0, *res;
int s = -1;
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = type;
hints.ai_family = AF_UNSPEC;
if (getaddrinfo(host, port, &hints, &res0) != 0) {
debug(DBG_ERR, "connectport: can't resolve host %s port %s", host, port);
return -1;
}
for (res = res0; res; res = res->ai_next) {
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
debug(DBG_WARN, "connectport: socket failed");
continue;
}
if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
break;
debug(DBG_WARN, "connectport: connect failed");
close(s);
s = -1;
}
freeaddrinfo(res0);
return s;
}
int bindtoaddr(struct addrinfo *addrinfo, int family, int reuse, int v6only) {
int s, on = 1;
struct addrinfo *res;
for (res = addrinfo; res; res = res->ai_next) {
if (family != AF_UNSPEC && family != res->ai_family)
continue;
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
debug(DBG_WARN, "bindtoaddr: socket failed");
continue;
}
if (reuse)
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
#ifdef IPV6_V6ONLY
if (v6only)
setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
#endif
if (!bind(s, res->ai_addr, res->ai_addrlen))
return s;
debug(DBG_WARN, "bindtoaddr: bind failed");
close(s);
}
return -1;
}
int connecttcp(struct addrinfo *addrinfo, struct addrinfo *src) {
int s;
struct addrinfo *res;
s = -1;
for (res = addrinfo; res; res = res->ai_next) {
s = bindtoaddr(src, res->ai_family, 1, 1);
if (s < 0) {
debug(DBG_WARN, "connecttoserver: socket failed");
continue;
}
if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
break;
debug(DBG_WARN, "connecttoserver: connect failed");
close(s);
s = -1;
}
return s;
}
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