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