blob: 6568cecb730dd8e51b926057f0a4140176000e77 [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
static ngx_int_t ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u);
static ngx_int_t ngx_parse_inet_url(ngx_pool_t *pool, ngx_url_t *u);
/* AF_INET only */
in_addr_t
ngx_inet_addr(u_char *text, size_t len)
{
u_char *p, c;
in_addr_t addr;
ngx_uint_t octet, n;
addr = 0;
octet = 0;
n = 0;
for (p = text; p < text + len; p++) {
c = *p;
if (c >= '0' && c <= '9') {
octet = octet * 10 + (c - '0');
continue;
}
if (c == '.' && octet < 256) {
addr = (addr << 8) + octet;
octet = 0;
n++;
continue;
}
return INADDR_NONE;
}
if (n != 3) {
return INADDR_NONE;
}
if (octet < 256) {
addr = (addr << 8) + octet;
return htonl(addr);
}
return INADDR_NONE;
}
/* AF_INET only */
size_t
ngx_sock_ntop(struct sockaddr *sa, u_char *text, size_t len)
{
u_char *p;
struct sockaddr_in *sin;
if (sa->sa_family == AF_INET) {
sin = (struct sockaddr_in *) sa;
p = (u_char *) &sin->sin_addr;
return ngx_snprintf(text, len, "%ud.%ud.%ud.%ud",
p[0], p[1], p[2], p[3])
- text;
}
return 0;
}
size_t
ngx_inet_ntop(int family, void *addr, u_char *text, size_t len)
{
u_char *p;
if (family == AF_INET) {
p = (u_char *) addr;
return ngx_snprintf(text, len, "%ud.%ud.%ud.%ud",
p[0], p[1], p[2], p[3])
- text;
}
return 0;
}
/* AF_INET only */
ngx_int_t
ngx_ptocidr(ngx_str_t *text, void *cidr)
{
u_char *addr, *mask, *last;
ngx_int_t shift;
ngx_inet_cidr_t *in_cidr;
in_cidr = cidr;
addr = text->data;
last = addr + text->len;
mask = ngx_strlchr(addr, last, '/');
in_cidr->addr = ngx_inet_addr(addr, (mask ? mask : last) - addr);
if (in_cidr->addr == INADDR_NONE) {
return NGX_ERROR;
}
if (mask == NULL) {
in_cidr->mask = 0xffffffff;
return NGX_OK;
}
mask++;
shift = ngx_atoi(mask, last - mask);
if (shift == NGX_ERROR) {
return NGX_ERROR;
}
if (shift == 0) {
/* the x86 compilers use the shl instruction that shifts by modulo 32 */
in_cidr->mask = 0;
if (in_cidr->addr == 0) {
return NGX_OK;
}
return NGX_DONE;
}
in_cidr->mask = htonl((ngx_uint_t) (0 - (1 << (32 - shift))));
if (in_cidr->addr == (in_cidr->addr & in_cidr->mask)) {
return NGX_OK;
}
in_cidr->addr &= in_cidr->mask;
return NGX_DONE;
}
ngx_int_t
ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u)
{
u_char *p;
p = u->url.data;
if (ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) {
return ngx_parse_unix_domain_url(pool, u);
}
if ((p[0] == ':' || p[0] == '/') && !u->listen) {
u->err = "invalid host";
return NGX_ERROR;
}
return ngx_parse_inet_url(pool, u);
}
static ngx_int_t
ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u)
{
#if (NGX_HAVE_UNIX_DOMAIN)
u_char *path, *uri, *last;
size_t len;
struct sockaddr_un *saun;
len = u->url.len;
path = u->url.data;
path += 5;
len -= 5;
if (u->uri_part) {
last = path + len;
uri = ngx_strlchr(path, last, ':');
if (uri) {
len = uri - path;
uri++;
u->uri.len = last - uri;
u->uri.data = uri;
}
}
if (len == 0) {
u->err = "no path in the unix domain socket";
return NGX_ERROR;
}
u->host.len = len++;
u->host.data = path;
u->family = AF_UNIX;
if (len > sizeof(saun->sun_path)) {
u->err = "too long path in the unix domain socket";
return NGX_ERROR;
}
u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t));
if (u->addrs == NULL) {
return NGX_ERROR;
}
saun = ngx_pcalloc(pool, sizeof(struct sockaddr_un));
if (saun == NULL) {
return NGX_ERROR;
}
u->naddrs = 1;
saun->sun_family = AF_UNIX;
(void) ngx_cpystrn((u_char *) saun->sun_path, path, len);
u->addrs[0].sockaddr = (struct sockaddr *) saun;
u->addrs[0].socklen = sizeof(struct sockaddr_un);
u->addrs[0].name.len = len + 4;
u->addrs[0].name.data = u->url.data;
return NGX_OK;
#else
u->err = "the unix domain sockets are not supported on this platform";
return NGX_ERROR;
#endif
}
static ngx_int_t
ngx_parse_inet_url(ngx_pool_t *pool, ngx_url_t *u)
{
u_char *p, *host, *port, *last, *uri;
size_t len;
ngx_int_t n;
struct hostent *h;
u->family = AF_INET;
host = u->url.data;
last = host + u->url.len;
port = ngx_strlchr(host, last, ':');
uri = ngx_strlchr(port ? port : host, last, '/');
if (uri) {
if (u->listen || !u->uri_part) {
u->err = "invalid host";
return NGX_ERROR;
}
u->uri.len = last - uri;
u->uri.data = uri;
last = uri;
}
if (port) {
port++;
len = last - port;
if (len == 0) {
u->err = "invalid port";
return NGX_ERROR;
}
n = ngx_atoi(port, len);
if (n < 1 || n > 65536) {
u->err = "invalid port";
return NGX_ERROR;
}
u->port = (in_port_t) n;
u->port_text.len = len;
u->port_text.data = port;
last = port - 1;
} else {
if (uri == NULL) {
if (u->listen) {
/* test value as port only */
n = ngx_atoi(host, last - host);
if (n != NGX_ERROR) {
if (n < 1 || n > 65536) {
u->err = "invalid port";
return NGX_ERROR;
}
u->port = (in_port_t) n;
u->port_text.len = last - host;
u->port_text.data = host;
return NGX_OK;
}
}
}
u->no_port = 1;
}
len = last - host;
if (len == 0) {
u->err = "no host";
return NGX_ERROR;
}
if (len == 1 && *host == '*') {
len = 0;
}
u->host.len = len;
u->host.data = host;
if (u->no_resolve) {
return NGX_OK;
}
if (len++) {
p = ngx_alloc(len, pool->log);
if (p == NULL) {
return NGX_ERROR;
}
(void) ngx_cpystrn(p, host, len);
u->addr.in_addr = inet_addr((const char *) p);
if (u->addr.in_addr == INADDR_NONE) {
h = gethostbyname((const char *) p);
if (h == NULL || h->h_addr_list[0] == NULL) {
ngx_free(p);
u->err = "host not found";
return NGX_ERROR;
}
u->addr.in_addr = *(in_addr_t *) (h->h_addr_list[0]);
}
ngx_free(p);
} else {
u->addr.in_addr = INADDR_ANY;
}
if (u->no_port) {
u->port = u->default_port;
}
if (u->listen) {
return NGX_OK;
}
if (ngx_inet_resolve_host(pool, u) != NGX_OK) {
return NGX_ERROR;
}
return NGX_OK;
}
ngx_int_t
ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u)
{
u_char *p, *host;
size_t len;
in_addr_t in_addr;
ngx_uint_t i;
struct hostent *h;
struct sockaddr_in *sin;
host = ngx_alloc(u->host.len + 1, pool->log);
if (host == NULL) {
return NGX_ERROR;
}
(void) ngx_cpystrn(host, u->host.data, u->host.len + 1);
/* AF_INET only */
in_addr = inet_addr((char *) host);
if (in_addr == INADDR_NONE) {
h = gethostbyname((char *) host);
ngx_free(host);
if (h == NULL || h->h_addr_list[0] == NULL) {
u->err = "host not found";
return NGX_ERROR;
}
if (u->one_addr == 0) {
for (i = 0; h->h_addr_list[i] != NULL; i++) { /* void */ }
} else {
i = 1;
}
/* MP: ngx_shared_palloc() */
u->addrs = ngx_pcalloc(pool, i * sizeof(ngx_peer_addr_t));
if (u->addrs == NULL) {
return NGX_ERROR;
}
u->naddrs = i;
for (i = 0; h->h_addr_list[i] != NULL; i++) {
sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in));
if (sin == NULL) {
return NGX_ERROR;
}
sin->sin_family = AF_INET;
sin->sin_port = htons(u->port);
sin->sin_addr.s_addr = *(in_addr_t *) (h->h_addr_list[i]);
u->addrs[i].sockaddr = (struct sockaddr *) sin;
u->addrs[i].socklen = sizeof(struct sockaddr_in);
len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1;
p = ngx_pnalloc(pool, len);
if (p == NULL) {
return NGX_ERROR;
}
len = ngx_sock_ntop((struct sockaddr *) sin, p, len);
u->addrs[i].name.len = ngx_sprintf(&p[len], ":%d", u->port) - p;
u->addrs[i].name.data = p;
}
} else {
ngx_free(host);
/* MP: ngx_shared_palloc() */
u->addrs = ngx_pcalloc(pool, sizeof(ngx_peer_addr_t));
if (u->addrs == NULL) {
return NGX_ERROR;
}
sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in));
if (sin == NULL) {
return NGX_ERROR;
}
u->naddrs = 1;
sin->sin_family = AF_INET;
sin->sin_port = htons(u->port);
sin->sin_addr.s_addr = in_addr;
u->addrs[0].sockaddr = (struct sockaddr *) sin;
u->addrs[0].socklen = sizeof(struct sockaddr_in);
p = ngx_pnalloc(pool, u->host.len + sizeof(":65536") - 1);
if (p == NULL) {
return NGX_ERROR;
}
u->addrs[0].name.len = ngx_sprintf(p, "%V:%d", &u->host, u->port) - p;
u->addrs[0].name.data = p;
}
return NGX_OK;
}