Mercurial > hg > nginx
view src/core/ngx_inet.c @ 8794:ba5977b38b2e quic
HTTP/3: reordered H3_MISSING_SETTINGS and H3_FRAME_UNEXPECTED.
The quic-http-34 is ambiguous as to what error should be generated for the
first frame in control stream:
Each side MUST initiate a single control stream at the beginning of
the connection and send its SETTINGS frame as the first frame on this
stream. If the first frame of the control stream is any other frame
type, this MUST be treated as a connection error of type
H3_MISSING_SETTINGS.
If a DATA frame is received on a control stream, the recipient MUST
respond with a connection error of type H3_FRAME_UNEXPECTED.
If a HEADERS frame is received on a control stream, the recipient MUST
respond with a connection error of type H3_FRAME_UNEXPECTED.
Previously, H3_FRAME_UNEXPECTED had priority, but now H3_MISSING_SETTINGS has.
The arguments in the spec sound more compelling for H3_MISSING_SETTINGS.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Fri, 11 Jun 2021 10:56:51 +0300 |
parents | d9c3917c7f90 |
children |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #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); static ngx_int_t ngx_parse_inet6_url(ngx_pool_t *pool, ngx_url_t *u); static ngx_int_t ngx_inet_add_addr(ngx_pool_t *pool, ngx_url_t *u, struct sockaddr *sockaddr, socklen_t socklen, ngx_uint_t total); 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'); if (octet > 255) { return INADDR_NONE; } continue; } if (c == '.') { addr = (addr << 8) + octet; octet = 0; n++; continue; } return INADDR_NONE; } if (n == 3) { addr = (addr << 8) + octet; return htonl(addr); } return INADDR_NONE; } #if (NGX_HAVE_INET6) ngx_int_t ngx_inet6_addr(u_char *p, size_t len, u_char *addr) { u_char c, *zero, *digit, *s, *d; size_t len4; ngx_uint_t n, nibbles, word; if (len == 0) { return NGX_ERROR; } zero = NULL; digit = NULL; len4 = 0; nibbles = 0; word = 0; n = 8; if (p[0] == ':') { p++; len--; } for (/* void */; len; len--) { c = *p++; if (c == ':') { if (nibbles) { digit = p; len4 = len; *addr++ = (u_char) (word >> 8); *addr++ = (u_char) (word & 0xff); if (--n) { nibbles = 0; word = 0; continue; } } else { if (zero == NULL) { digit = p; len4 = len; zero = addr; continue; } } return NGX_ERROR; } if (c == '.' && nibbles) { if (n < 2 || digit == NULL) { return NGX_ERROR; } word = ngx_inet_addr(digit, len4 - 1); if (word == INADDR_NONE) { return NGX_ERROR; } word = ntohl(word); *addr++ = (u_char) ((word >> 24) & 0xff); *addr++ = (u_char) ((word >> 16) & 0xff); n--; break; } if (++nibbles > 4) { return NGX_ERROR; } if (c >= '0' && c <= '9') { word = word * 16 + (c - '0'); continue; } c |= 0x20; if (c >= 'a' && c <= 'f') { word = word * 16 + (c - 'a') + 10; continue; } return NGX_ERROR; } if (nibbles == 0 && zero == NULL) { return NGX_ERROR; } *addr++ = (u_char) (word >> 8); *addr++ = (u_char) (word & 0xff); if (--n) { if (zero) { n *= 2; s = addr - 1; d = s + n; while (s >= zero) { *d-- = *s--; } ngx_memzero(zero, n); return NGX_OK; } } else { if (zero == NULL) { return NGX_OK; } } return NGX_ERROR; } #endif size_t ngx_sock_ntop(struct sockaddr *sa, socklen_t socklen, u_char *text, size_t len, ngx_uint_t port) { u_char *p; #if (NGX_HAVE_INET6 || NGX_HAVE_UNIX_DOMAIN) size_t n; #endif struct sockaddr_in *sin; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif #if (NGX_HAVE_UNIX_DOMAIN) struct sockaddr_un *saun; #endif switch (sa->sa_family) { case AF_INET: sin = (struct sockaddr_in *) sa; p = (u_char *) &sin->sin_addr; if (port) { p = ngx_snprintf(text, len, "%ud.%ud.%ud.%ud:%d", p[0], p[1], p[2], p[3], ntohs(sin->sin_port)); } else { p = ngx_snprintf(text, len, "%ud.%ud.%ud.%ud", p[0], p[1], p[2], p[3]); } return (p - text); #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) sa; n = 0; if (port) { text[n++] = '['; } n = ngx_inet6_ntop(sin6->sin6_addr.s6_addr, &text[n], len); if (port) { n = ngx_sprintf(&text[1 + n], "]:%d", ntohs(sin6->sin6_port)) - text; } return n; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: saun = (struct sockaddr_un *) sa; /* on Linux sockaddr might not include sun_path at all */ if (socklen <= (socklen_t) offsetof(struct sockaddr_un, sun_path)) { p = ngx_snprintf(text, len, "unix:%Z"); } else { n = ngx_strnlen((u_char *) saun->sun_path, socklen - offsetof(struct sockaddr_un, sun_path)); p = ngx_snprintf(text, len, "unix:%*s%Z", n, saun->sun_path); } /* we do not include trailing zero in address length */ return (p - text - 1); #endif default: return 0; } } size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len) { u_char *p; switch (family) { case AF_INET: p = addr; return ngx_snprintf(text, len, "%ud.%ud.%ud.%ud", p[0], p[1], p[2], p[3]) - text; #if (NGX_HAVE_INET6) case AF_INET6: return ngx_inet6_ntop(addr, text, len); #endif default: return 0; } } #if (NGX_HAVE_INET6) size_t ngx_inet6_ntop(u_char *p, u_char *text, size_t len) { u_char *dst; size_t max, n; ngx_uint_t i, zero, last; if (len < NGX_INET6_ADDRSTRLEN) { return 0; } zero = (ngx_uint_t) -1; last = (ngx_uint_t) -1; max = 1; n = 0; for (i = 0; i < 16; i += 2) { if (p[i] || p[i + 1]) { if (max < n) { zero = last; max = n; } n = 0; continue; } if (n++ == 0) { last = i; } } if (max < n) { zero = last; max = n; } dst = text; n = 16; if (zero == 0) { if ((max == 5 && p[10] == 0xff && p[11] == 0xff) || (max == 6) || (max == 7 && p[14] != 0 && p[15] != 1)) { n = 12; } *dst++ = ':'; } for (i = 0; i < n; i += 2) { if (i == zero) { *dst++ = ':'; i += (max - 1) * 2; continue; } dst = ngx_sprintf(dst, "%xd", p[i] * 256 + p[i + 1]); if (i < 14) { *dst++ = ':'; } } if (n == 12) { dst = ngx_sprintf(dst, "%ud.%ud.%ud.%ud", p[12], p[13], p[14], p[15]); } return dst - text; } #endif ngx_int_t ngx_ptocidr(ngx_str_t *text, ngx_cidr_t *cidr) { u_char *addr, *mask, *last; size_t len; ngx_int_t shift; #if (NGX_HAVE_INET6) ngx_int_t rc; ngx_uint_t s, i; #endif addr = text->data; last = addr + text->len; mask = ngx_strlchr(addr, last, '/'); len = (mask ? mask : last) - addr; cidr->u.in.addr = ngx_inet_addr(addr, len); if (cidr->u.in.addr != INADDR_NONE) { cidr->family = AF_INET; if (mask == NULL) { cidr->u.in.mask = 0xffffffff; return NGX_OK; } #if (NGX_HAVE_INET6) } else if (ngx_inet6_addr(addr, len, cidr->u.in6.addr.s6_addr) == NGX_OK) { cidr->family = AF_INET6; if (mask == NULL) { ngx_memset(cidr->u.in6.mask.s6_addr, 0xff, 16); return NGX_OK; } #endif } else { return NGX_ERROR; } mask++; shift = ngx_atoi(mask, last - mask); if (shift == NGX_ERROR) { return NGX_ERROR; } switch (cidr->family) { #if (NGX_HAVE_INET6) case AF_INET6: if (shift > 128) { return NGX_ERROR; } addr = cidr->u.in6.addr.s6_addr; mask = cidr->u.in6.mask.s6_addr; rc = NGX_OK; for (i = 0; i < 16; i++) { s = (shift > 8) ? 8 : shift; shift -= s; mask[i] = (u_char) (0xffu << (8 - s)); if (addr[i] != (addr[i] & mask[i])) { rc = NGX_DONE; addr[i] &= mask[i]; } } return rc; #endif default: /* AF_INET */ if (shift > 32) { return NGX_ERROR; } if (shift) { cidr->u.in.mask = htonl((uint32_t) (0xffffffffu << (32 - shift))); } else { /* x86 compilers use a shl instruction that shifts by modulo 32 */ cidr->u.in.mask = 0; } if (cidr->u.in.addr == (cidr->u.in.addr & cidr->u.in.mask)) { return NGX_OK; } cidr->u.in.addr &= cidr->u.in.mask; return NGX_DONE; } } ngx_int_t ngx_cidr_match(struct sockaddr *sa, ngx_array_t *cidrs) { #if (NGX_HAVE_INET6) u_char *p; #endif in_addr_t inaddr; ngx_cidr_t *cidr; ngx_uint_t family, i; #if (NGX_HAVE_INET6) ngx_uint_t n; struct in6_addr *inaddr6; #endif #if (NGX_SUPPRESS_WARN) inaddr = 0; #if (NGX_HAVE_INET6) inaddr6 = NULL; #endif #endif family = sa->sa_family; if (family == AF_INET) { inaddr = ((struct sockaddr_in *) sa)->sin_addr.s_addr; } #if (NGX_HAVE_INET6) else if (family == AF_INET6) { inaddr6 = &((struct sockaddr_in6 *) sa)->sin6_addr; if (IN6_IS_ADDR_V4MAPPED(inaddr6)) { family = AF_INET; p = inaddr6->s6_addr; inaddr = p[12] << 24; inaddr += p[13] << 16; inaddr += p[14] << 8; inaddr += p[15]; inaddr = htonl(inaddr); } } #endif for (cidr = cidrs->elts, i = 0; i < cidrs->nelts; i++) { if (cidr[i].family != family) { goto next; } switch (family) { #if (NGX_HAVE_INET6) case AF_INET6: for (n = 0; n < 16; n++) { if ((inaddr6->s6_addr[n] & cidr[i].u.in6.mask.s6_addr[n]) != cidr[i].u.in6.addr.s6_addr[n]) { goto next; } } break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: break; #endif default: /* AF_INET */ if ((inaddr & cidr[i].u.in.mask) != cidr[i].u.in.addr) { goto next; } break; } return NGX_OK; next: continue; } return NGX_DECLINED; } ngx_int_t ngx_parse_addr(ngx_pool_t *pool, ngx_addr_t *addr, u_char *text, size_t len) { in_addr_t inaddr; ngx_uint_t family; struct sockaddr_in *sin; #if (NGX_HAVE_INET6) struct in6_addr inaddr6; struct sockaddr_in6 *sin6; /* * prevent MSVC8 warning: * potentially uninitialized local variable 'inaddr6' used */ ngx_memzero(&inaddr6, sizeof(struct in6_addr)); #endif inaddr = ngx_inet_addr(text, len); if (inaddr != INADDR_NONE) { family = AF_INET; len = sizeof(struct sockaddr_in); #if (NGX_HAVE_INET6) } else if (ngx_inet6_addr(text, len, inaddr6.s6_addr) == NGX_OK) { family = AF_INET6; len = sizeof(struct sockaddr_in6); #endif } else { return NGX_DECLINED; } addr->sockaddr = ngx_pcalloc(pool, len); if (addr->sockaddr == NULL) { return NGX_ERROR; } addr->sockaddr->sa_family = (u_char) family; addr->socklen = len; switch (family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) addr->sockaddr; ngx_memcpy(sin6->sin6_addr.s6_addr, inaddr6.s6_addr, 16); break; #endif default: /* AF_INET */ sin = (struct sockaddr_in *) addr->sockaddr; sin->sin_addr.s_addr = inaddr; break; } return NGX_OK; } ngx_int_t ngx_parse_addr_port(ngx_pool_t *pool, ngx_addr_t *addr, u_char *text, size_t len) { u_char *p, *last; size_t plen; ngx_int_t rc, port; rc = ngx_parse_addr(pool, addr, text, len); if (rc != NGX_DECLINED) { return rc; } last = text + len; #if (NGX_HAVE_INET6) if (len && text[0] == '[') { p = ngx_strlchr(text, last, ']'); if (p == NULL || p == last - 1 || *++p != ':') { return NGX_DECLINED; } text++; len -= 2; } else #endif { p = ngx_strlchr(text, last, ':'); if (p == NULL) { return NGX_DECLINED; } } p++; plen = last - p; port = ngx_atoi(p, plen); if (port < 1 || port > 65535) { return NGX_DECLINED; } len -= plen + 1; rc = ngx_parse_addr(pool, addr, text, len); if (rc != NGX_OK) { return rc; } ngx_inet_set_port(addr->sockaddr, (in_port_t) port); return NGX_OK; } ngx_int_t ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u) { u_char *p; size_t len; p = u->url.data; len = u->url.len; if (len >= 5 && ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) { return ngx_parse_unix_domain_url(pool, u); } if (len && p[0] == '[') { return ngx_parse_inet6_url(pool, u); } 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; if (len > sizeof(saun->sun_path)) { u->err = "too long path in the unix domain socket"; return NGX_ERROR; } u->socklen = sizeof(struct sockaddr_un); saun = (struct sockaddr_un *) &u->sockaddr; saun->sun_family = AF_UNIX; (void) ngx_cpystrn((u_char *) saun->sun_path, path, len); u->addrs = ngx_pcalloc(pool, sizeof(ngx_addr_t)); if (u->addrs == NULL) { return NGX_ERROR; } saun = ngx_pcalloc(pool, sizeof(struct sockaddr_un)); if (saun == NULL) { return NGX_ERROR; } u->family = AF_UNIX; 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 *host, *port, *last, *uri, *args, *dash; size_t len; ngx_int_t n; struct sockaddr_in *sin; u->socklen = sizeof(struct sockaddr_in); sin = (struct sockaddr_in *) &u->sockaddr; sin->sin_family = AF_INET; u->family = AF_INET; host = u->url.data; last = host + u->url.len; port = ngx_strlchr(host, last, ':'); uri = ngx_strlchr(host, last, '/'); args = ngx_strlchr(host, last, '?'); 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; if (u->listen) { dash = ngx_strlchr(port, last, '-'); if (dash) { dash++; n = ngx_atoi(dash, last - dash); if (n < 1 || n > 65535) { u->err = "invalid port"; return NGX_ERROR; } u->last_port = (in_port_t) n; len = dash - port - 1; } } n = ngx_atoi(port, len); if (n < 1 || n > 65535) { u->err = "invalid port"; return NGX_ERROR; } if (u->last_port && n > u->last_port) { u->err = "invalid port range"; return NGX_ERROR; } u->port = (in_port_t) n; sin->sin_port = htons((in_port_t) n); u->port_text.len = last - port; u->port_text.data = port; last = port - 1; } else { if (uri == NULL) { if (u->listen) { /* test value as port only */ len = last - host; dash = ngx_strlchr(host, last, '-'); if (dash) { dash++; n = ngx_atoi(dash, last - dash); if (n == NGX_ERROR) { goto no_port; } if (n < 1 || n > 65535) { u->err = "invalid port"; } else { u->last_port = (in_port_t) n; } len = dash - host - 1; } n = ngx_atoi(host, len); if (n != NGX_ERROR) { if (u->err) { return NGX_ERROR; } if (n < 1 || n > 65535) { u->err = "invalid port"; return NGX_ERROR; } if (u->last_port && n > u->last_port) { u->err = "invalid port range"; return NGX_ERROR; } u->port = (in_port_t) n; sin->sin_port = htons((in_port_t) n); sin->sin_addr.s_addr = INADDR_ANY; u->port_text.len = last - host; u->port_text.data = host; u->wildcard = 1; return ngx_inet_add_addr(pool, u, &u->sockaddr.sockaddr, u->socklen, 1); } } } no_port: u->err = NULL; u->no_port = 1; u->port = u->default_port; sin->sin_port = htons(u->default_port); u->last_port = 0; } 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_inet_add_addr(pool, u, &u->sockaddr.sockaddr, u->socklen, 1); } 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; } return ngx_inet_add_addr(pool, u, &u->sockaddr.sockaddr, u->socklen, 1); } 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); u->wildcard = ngx_inet_wildcard(&u->sockaddr.sockaddr); return NGX_OK; } static ngx_int_t ngx_parse_inet6_url(ngx_pool_t *pool, ngx_url_t *u) { #if (NGX_HAVE_INET6) u_char *p, *host, *port, *last, *uri, *dash; size_t len; ngx_int_t n; struct sockaddr_in6 *sin6; u->socklen = sizeof(struct sockaddr_in6); sin6 = (struct sockaddr_in6 *) &u->sockaddr; sin6->sin6_family = AF_INET6; host = u->url.data + 1; last = u->url.data + u->url.len; p = ngx_strlchr(host, last, ']'); if (p == NULL) { u->err = "invalid host"; return NGX_ERROR; } port = p + 1; uri = ngx_strlchr(port, 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 < last) { if (*port != ':') { u->err = "invalid host"; return NGX_ERROR; } port++; len = last - port; if (u->listen) { dash = ngx_strlchr(port, last, '-'); if (dash) { dash++; n = ngx_atoi(dash, last - dash); if (n < 1 || n > 65535) { u->err = "invalid port"; return NGX_ERROR; } u->last_port = (in_port_t) n; len = dash - port - 1; } } n = ngx_atoi(port, len); if (n < 1 || n > 65535) { u->err = "invalid port"; return NGX_ERROR; } if (u->last_port && n > u->last_port) { u->err = "invalid port range"; return NGX_ERROR; } u->port = (in_port_t) n; sin6->sin6_port = htons((in_port_t) n); u->port_text.len = last - port; u->port_text.data = port; } else { u->no_port = 1; u->port = u->default_port; sin6->sin6_port = htons(u->default_port); } len = p - host; if (len == 0) { u->err = "no host"; return NGX_ERROR; } u->host.len = len + 2; u->host.data = host - 1; if (ngx_inet6_addr(host, len, sin6->sin6_addr.s6_addr) != NGX_OK) { u->err = "invalid IPv6 address"; return NGX_ERROR; } if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { u->wildcard = 1; } u->family = AF_INET6; return ngx_inet_add_addr(pool, u, &u->sockaddr.sockaddr, u->socklen, 1); #else u->err = "the INET6 sockets are not supported on this platform"; return NGX_ERROR; #endif } #if (NGX_HAVE_GETADDRINFO && NGX_HAVE_INET6) ngx_int_t ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u) { u_char *host; ngx_uint_t n; struct addrinfo hints, *res, *rp; 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); ngx_memzero(&hints, sizeof(struct addrinfo)); hints.ai_family = AF_UNSPEC; hints.ai_socktype = SOCK_STREAM; #ifdef AI_ADDRCONFIG hints.ai_flags = AI_ADDRCONFIG; #endif if (getaddrinfo((char *) host, NULL, &hints, &res) != 0) { u->err = "host not found"; ngx_free(host); return NGX_ERROR; } ngx_free(host); for (n = 0, rp = res; rp != NULL; rp = rp->ai_next) { switch (rp->ai_family) { case AF_INET: case AF_INET6: break; default: continue; } n++; } if (n == 0) { u->err = "host not found"; goto failed; } /* MP: ngx_shared_palloc() */ for (rp = res; rp != NULL; rp = rp->ai_next) { switch (rp->ai_family) { case AF_INET: case AF_INET6: break; default: continue; } if (ngx_inet_add_addr(pool, u, rp->ai_addr, rp->ai_addrlen, n) != NGX_OK) { goto failed; } } freeaddrinfo(res); return NGX_OK; failed: freeaddrinfo(res); return NGX_ERROR; } #else /* !NGX_HAVE_GETADDRINFO || !NGX_HAVE_INET6 */ ngx_int_t ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u) { u_char *host; ngx_uint_t i, n; struct hostent *h; struct sockaddr_in sin; /* AF_INET only */ ngx_memzero(&sin, sizeof(struct sockaddr_in)); sin.sin_family = AF_INET; sin.sin_addr.s_addr = ngx_inet_addr(u->host.data, u->host.len); if (sin.sin_addr.s_addr == INADDR_NONE) { 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); h = gethostbyname((char *) host); ngx_free(host); if (h == NULL || h->h_addr_list[0] == NULL) { u->err = "host not found"; return NGX_ERROR; } for (n = 0; h->h_addr_list[n] != NULL; n++) { /* void */ } /* MP: ngx_shared_palloc() */ for (i = 0; i < n; i++) { sin.sin_addr.s_addr = *(in_addr_t *) (h->h_addr_list[i]); if (ngx_inet_add_addr(pool, u, (struct sockaddr *) &sin, sizeof(struct sockaddr_in), n) != NGX_OK) { return NGX_ERROR; } } } else { /* MP: ngx_shared_palloc() */ if (ngx_inet_add_addr(pool, u, (struct sockaddr *) &sin, sizeof(struct sockaddr_in), 1) != NGX_OK) { return NGX_ERROR; } } return NGX_OK; } #endif /* NGX_HAVE_GETADDRINFO && NGX_HAVE_INET6 */ static ngx_int_t ngx_inet_add_addr(ngx_pool_t *pool, ngx_url_t *u, struct sockaddr *sockaddr, socklen_t socklen, ngx_uint_t total) { u_char *p; size_t len; ngx_uint_t i, nports; ngx_addr_t *addr; struct sockaddr *sa; nports = u->last_port ? u->last_port - u->port + 1 : 1; if (u->addrs == NULL) { u->addrs = ngx_palloc(pool, total * nports * sizeof(ngx_addr_t)); if (u->addrs == NULL) { return NGX_ERROR; } } for (i = 0; i < nports; i++) { sa = ngx_pcalloc(pool, socklen); if (sa == NULL) { return NGX_ERROR; } ngx_memcpy(sa, sockaddr, socklen); ngx_inet_set_port(sa, u->port + i); switch (sa->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: len = NGX_INET6_ADDRSTRLEN + sizeof("[]:65536") - 1; break; #endif default: /* AF_INET */ len = NGX_INET_ADDRSTRLEN + sizeof(":65535") - 1; } p = ngx_pnalloc(pool, len); if (p == NULL) { return NGX_ERROR; } len = ngx_sock_ntop(sa, socklen, p, len, 1); addr = &u->addrs[u->naddrs++]; addr->sockaddr = sa; addr->socklen = socklen; addr->name.len = len; addr->name.data = p; } return NGX_OK; } ngx_int_t ngx_cmp_sockaddr(struct sockaddr *sa1, socklen_t slen1, struct sockaddr *sa2, socklen_t slen2, ngx_uint_t cmp_port) { struct sockaddr_in *sin1, *sin2; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin61, *sin62; #endif #if (NGX_HAVE_UNIX_DOMAIN) size_t len; struct sockaddr_un *saun1, *saun2; #endif if (sa1->sa_family != sa2->sa_family) { return NGX_DECLINED; } switch (sa1->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin61 = (struct sockaddr_in6 *) sa1; sin62 = (struct sockaddr_in6 *) sa2; if (cmp_port && sin61->sin6_port != sin62->sin6_port) { return NGX_DECLINED; } if (ngx_memcmp(&sin61->sin6_addr, &sin62->sin6_addr, 16) != 0) { return NGX_DECLINED; } break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: saun1 = (struct sockaddr_un *) sa1; saun2 = (struct sockaddr_un *) sa2; if (slen1 < slen2) { len = slen1 - offsetof(struct sockaddr_un, sun_path); } else { len = slen2 - offsetof(struct sockaddr_un, sun_path); } if (len > sizeof(saun1->sun_path)) { len = sizeof(saun1->sun_path); } if (ngx_memcmp(&saun1->sun_path, &saun2->sun_path, len) != 0) { return NGX_DECLINED; } break; #endif default: /* AF_INET */ sin1 = (struct sockaddr_in *) sa1; sin2 = (struct sockaddr_in *) sa2; if (cmp_port && sin1->sin_port != sin2->sin_port) { return NGX_DECLINED; } if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { return NGX_DECLINED; } break; } return NGX_OK; } in_port_t ngx_inet_get_port(struct sockaddr *sa) { struct sockaddr_in *sin; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif switch (sa->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) sa; return ntohs(sin6->sin6_port); #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: return 0; #endif default: /* AF_INET */ sin = (struct sockaddr_in *) sa; return ntohs(sin->sin_port); } } void ngx_inet_set_port(struct sockaddr *sa, in_port_t port) { struct sockaddr_in *sin; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif switch (sa->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) sa; sin6->sin6_port = htons(port); break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: break; #endif default: /* AF_INET */ sin = (struct sockaddr_in *) sa; sin->sin_port = htons(port); break; } } ngx_uint_t ngx_inet_wildcard(struct sockaddr *sa) { struct sockaddr_in *sin; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif switch (sa->sa_family) { case AF_INET: sin = (struct sockaddr_in *) sa; if (sin->sin_addr.s_addr == INADDR_ANY) { return 1; } break; #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) sa; if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { return 1; } break; #endif } return 0; }