// u.url = “80”;
// u.listen = 1;
// u.default_port = 80;
static ngx_int_t
ngx_parse_inet_url(ngx_pool_t *pool, ngx_url_t *u)
{
u_char *p, *host, *port, *last, *uri, *args;
size_t len;
ngx_int_t n;
struct sockaddr_in *sin;
#if (NGX_HAVE_INET6)
struct sockaddr_in6 *sin6;
#endif
u->socklen = sizeof(struct sockaddr_in);
sin = (struct sockaddr_in *) &u->sockaddr;
sin->sin_family = AF_INET;// IPV4类型
u->family = AF_INET;
host = u->url.data; // “80”
last = host + u->url.len; // host的最后字符的位置
port = ngx_strlchr(host, last, :); // 找到port, 这里为 NULL
uri = ngx_strlchr(host, last, /); // 找到uri,这里为 NULL
args = ngx_strlchr(host, last, ?); // 找到参数args,这里为 NULL
if (args) {
if (uri == NULL || args < uri) {
uri = args;
}
}
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 (uri < port) {
port = NULL;
}
}
if (port) {
port++;
len = last – port;
n = ngx_atoi(port, len);
if (n < 1 || n > 65535) {
u->err = “invalid port”;
return NGX_ERROR;
}
u->port = (in_port_t) n;
sin->sin_port = htons((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 > 65535) {
u->err = “invalid port”;
return NGX_ERROR;
}
u->port = (in_port_t) n;
sin->sin_port = htons((in_port_t) n);
u->port_text.len = last – host;
u->port_text.data = host;
u->wildcard = 1;
return NGX_OK;
}
}
}
u->no_port = 1;
u->port = u->default_port;
sin->sin_port = htons(u->default_port);
}
len = last – host;
if (len == 0) {
u->err = “no host”;
return NGX_ERROR;
}
u->host.len = len;
u->host.data = host;
if (u->listen && len == 1 && *host == *) {
sin->sin_addr.s_addr = INADDR_ANY;
u->wildcard = 1;
return NGX_OK;
}
sin->sin_addr.s_addr = ngx_inet_addr(host, len);
if (sin->sin_addr.s_addr != INADDR_NONE) {
if (sin->sin_addr.s_addr == INADDR_ANY) {
u->wildcard = 1;
}
u->naddrs = 1;
u->addrs = ngx_pcalloc(pool, sizeof(ngx_addr_t));
if (u->addrs == NULL) {
return NGX_ERROR;
}
sin = ngx_pcalloc(pool, sizeof(struct sockaddr_in));
if (sin == NULL) {
return NGX_ERROR;
}
ngx_memcpy(sin, &u->sockaddr, sizeof(struct sockaddr_in));
u->addrs[0].sockaddr = (struct sockaddr *) sin;
u->addrs[0].socklen = sizeof(struct sockaddr_in);
p = ngx_pnalloc(pool, u->host.len + sizeof(“:65535”) – 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;
}
if (u->no_resolve) {
return NGX_OK;
}
if (ngx_inet_resolve_host(pool, u) != NGX_OK) {
return NGX_ERROR;
}
u->family = u->addrs[0].sockaddr->sa_family;
u->socklen = u->addrs[0].socklen;
ngx_memcpy(&u->sockaddr, u->addrs[0].sockaddr, u->addrs[0].socklen);
switch (u->family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) &u->sockaddr;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
u->wildcard = 1;
}
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) &u->sockaddr;
if (sin->sin_addr.s_addr == INADDR_ANY) {
u->wildcard = 1;
}
break;
}
return NGX_OK;
}