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#include <stdlib.h>
#include <string.h>
#include "log.h"
#include "sys-socket.h"
#include "mod_proxy_core_address.h"
static proxy_address *proxy_address_init(void) {
proxy_address *address;
address = calloc(1, sizeof(*address));
address->name = buffer_init();
address->used = 0;
return address;
}
static void proxy_address_free(proxy_address *address) {
if (!address) return;
buffer_free(address->name);
free(address);
}
proxy_address_pool *proxy_address_pool_init(void) {
proxy_address_pool *address_pool;
address_pool = calloc(1, sizeof(*address_pool));
return address_pool;
}
void proxy_address_pool_free(proxy_address_pool *address_pool) {
if (!address_pool) return;
ARRAY_STATIC_FREE(address_pool, proxy_address, element, proxy_address_free(element));
free(address_pool);
}
void proxy_address_pool_add(proxy_address_pool *address_pool, proxy_address *address) {
size_t i;
/* check if this address is already known */
for (i = 0; i < address_pool->used; i++) {
proxy_address *pool_address = address_pool->ptr[i];
if (buffer_is_equal(address->name, pool_address->name)) {
/* TRACE("%s is already in the address-pool", SAFE_BUF_STR(address->name)); */
proxy_address_free(address);
return;
}
}
/* TRACE("adding %s to the address-pool", SAFE_BUF_STR(address->name)); */
ARRAY_STATIC_PREPARE_APPEND(address_pool);
address_pool->ptr[address_pool->used++] = address;
}
int proxy_address_pool_add_string(proxy_address_pool *address_pool, buffer *name) {
struct addrinfo *res = NULL, pref, *cur;
int ret;
buffer *hostname = NULL, *port = NULL;
char *colon;
pref.ai_flags = 0;
pref.ai_family = PF_UNSPEC;
pref.ai_socktype = SOCK_STREAM;
pref.ai_protocol = 0;
pref.ai_addrlen = 0;
pref.ai_addr = NULL;
pref.ai_canonname = NULL;
pref.ai_next = NULL;
/* check the address style
*
* unix:/tmp/socket
* www.example.org
* www.example.org:80
* 127.0.0.1
* 127.0.0.1:80
* [::1]:80
* [::1]
*/
if (buffer_is_empty(name)) return -1;
if (0 == strncmp(BUF_STR(name), "unix:", 5)) {
/* a unix domain socket */
#ifdef HAVE_SYS_UN_H
proxy_address *a = proxy_address_init();
/* setup AF_UNIX sockaddr */
a->addr.un.sun_family = AF_UNIX;
strcpy(a->addr.un.sun_path, BUF_STR(name) + 5);
a->addrlen = sizeof(a->addr.un);
/*
#ifdef SUN_LEN
a->addrlen = SUN_LEN(&(a->addr.un));
#else
a->addrlen = (name->used - 5) + sizeof(a->addr.un.sun_family);
#endif
*/
a->state = PROXY_ADDRESS_STATE_ACTIVE;
buffer_copy_string_buffer(a->name, name);
proxy_address_pool_add(address_pool, a);
return 0;
#else
ERROR("unix: scheme is not supported for %s", SAFE_BUF_STR(name));
return -1;
#endif
} else if (name->ptr[0] == '[') {
if (name->ptr[name->used - 1] == ']') {
/* no port-number attached */
hostname = buffer_init();
buffer_copy_string_len(hostname, BUF_STR(name) + 1, name->used - 3);
port = buffer_init_string("80");
} else if (NULL != (colon = strrchr(BUF_STR(name), ':'))) {
/* with port number */
hostname = buffer_init();
buffer_copy_string_len(hostname, BUF_STR(name) + 1, colon - BUF_STR(name) - 2);
port = buffer_init();
buffer_copy_string(port, colon + 1);
} else {
ERROR("this is neither [<ipv6-address>] nor [<ipv6-address>]:<port>: %s", SAFE_BUF_STR(name));
return -1;
}
} else if (name->ptr[name->used - 1] != ']' &&
NULL != (colon = strrchr(BUF_STR(name), ':'))) {
hostname = buffer_init();
buffer_copy_string_len(hostname, BUF_STR(name), colon - BUF_STR(name));
port = buffer_init();
buffer_copy_string(port, colon + 1);
} else {
/* no colon, just a IPv4 address or a domain name */
hostname = buffer_init_string(BUF_STR(name));
port = buffer_init_string("80");
}
/* TRACE("resolving %s on port %s", SAFE_BUF_STR(hostname), SAFE_BUF_STR(port)); */
if (0 != (ret = getaddrinfo(BUF_STR(hostname), BUF_STR(port), &pref, &res))) {
ERROR("getaddrinfo failed: %s", gai_strerror(ret));
buffer_free(hostname);
buffer_free(port);
return -1;
}
buffer_free(hostname);
buffer_free(port);
for (cur = res; cur; cur = cur->ai_next) {
proxy_address *a = proxy_address_init();
memcpy(&(a->addr), cur->ai_addr, cur->ai_addrlen);
a->addrlen = cur->ai_addrlen;
a->state = PROXY_ADDRESS_STATE_ACTIVE;
buffer_prepare_copy(a->name, 128);
switch (cur->ai_family) {
#ifdef HAVE_IPV6
case AF_INET6:
a->name->ptr[0] = '[';
inet_ntop(cur->ai_family, &(a->addr.ipv6.sin6_addr), a->name->ptr + 1, a->name->size - 2);
a->name->used = strlen(a->name->ptr) + 1;
buffer_append_string_len(a->name, CONST_STR_LEN("]:"));
buffer_append_long(a->name, ntohs(a->addr.ipv6.sin6_port));
break;
#endif
case AF_INET:
inet_ntop(cur->ai_family, &(a->addr.ipv4.sin_addr), a->name->ptr, a->name->size - 1);
a->name->used = strlen(a->name->ptr) + 1;
buffer_append_string_len(a->name, CONST_STR_LEN(":"));
buffer_append_long(a->name, ntohs(a->addr.ipv4.sin_port));
break;
default:
ERROR("unknown address-family: %d", cur->ai_family);
return -1;
}
proxy_address_pool_add(address_pool, a);
}
freeaddrinfo(res);
return 0;
}
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