#include <stdlib.h>
-#include <stdio.h>
-#include <netdb.h>
-#include <netinet/in.h>
#include <sys/socket.h>
-#include <unistd.h>
-#include <string.h>
-#include <ctype.h>
-#include "__dns.h"
-#include "stdio_impl.h"
-
-static int is_valid(const char *host)
-{
- const unsigned char *s;
- if (strlen(host)-1 > 254 || mbstowcs(0, host, 0) > 255) return 0;
- for (s=(void *)host; *s>=0x80 || *s=='.' || *s=='-' || isalnum(*s); s++);
- return !*s;
-}
-
-#if 0
-static int have_af(int family)
-{
- struct sockaddr_in6 sin6 = { .sin6_family = family };
- socklen_t sl = family == AF_INET
- ? sizeof(struct sockaddr_in)
- : sizeof(struct sockaddr_in6);
- int sock = socket(family, SOCK_STREAM, 0);
- int have = !bind(sock, (void *)&sin6, sl);
- close(sock);
- return have;
-}
-#endif
-
-#include <stdlib.h>
+#include <netinet/in.h>
#include <netdb.h>
-
-union sa {
- struct sockaddr_in sin;
- struct sockaddr_in6 sin6;
-};
-
-struct aibuf {
- struct addrinfo ai;
- union sa sa;
-};
-
-/* Extra slots needed for storing canonical name */
-#define EXTRA ((256+sizeof(struct aibuf)-1)/sizeof(struct aibuf))
+#include <string.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <endian.h>
+#include <errno.h>
+#include "lookup.h"
int getaddrinfo(const char *restrict host, const char *restrict serv, const struct addrinfo *restrict hint, struct addrinfo **restrict res)
{
- int flags = hint ? hint->ai_flags : 0;
- int family = hint ? hint->ai_family : AF_UNSPEC;
- int type = hint ? hint->ai_socktype : 0;
- int proto = hint ? hint->ai_protocol : 0;
- unsigned long port = 0;
- struct aibuf *buf;
- union sa sa = {{0}};
- unsigned char reply[1024];
- int i, j;
- char line[512];
- FILE *f, _f;
- unsigned char _buf[1024];
- char *z;
- int result;
- int cnt;
-
- if (host && strlen(host)>255) return EAI_NONAME;
- if (serv && strlen(serv)>32) return EAI_SERVICE;
-
- if (type && !proto)
- proto = type==SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP;
- if (!type && proto)
- type = proto==IPPROTO_UDP ? SOCK_DGRAM : SOCK_STREAM;
-
- if (serv) {
- if (!*serv) return EAI_SERVICE;
- port = strtoul(serv, &z, 10);
- if (!*z && port > 65535) return EAI_SERVICE;
- if (!port) {
- size_t servlen = strlen(serv);
- char *end = line;
-
- if (flags & AI_NUMERICSERV) return EAI_SERVICE;
-
- f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
- if (!f) return EAI_SERVICE;
- while (fgets(line, sizeof line, f)) {
- if (strncmp(line, serv, servlen) || !isspace(line[servlen]))
- continue;
- port = strtoul(line+servlen, &end, 10);
- if (strncmp(end, proto==IPPROTO_UDP ? "/udp" : "/tcp", 4))
- continue;
- break;
- }
- __fclose_ca(f);
- if (feof(f)) return EAI_SERVICE;
+ struct service ports[MAXSERVS];
+ struct address addrs[MAXADDRS];
+ char canon[256], *outcanon;
+ int nservs, naddrs, nais, canon_len, i, j, k;
+ int family = AF_UNSPEC, flags = 0, proto = 0, socktype = 0;
+ int no_family = 0;
+ struct aibuf *out;
+
+ if (!host && !serv) return EAI_NONAME;
+
+ if (hint) {
+ family = hint->ai_family;
+ flags = hint->ai_flags;
+ proto = hint->ai_protocol;
+ socktype = hint->ai_socktype;
+
+ const int mask = AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST |
+ AI_V4MAPPED | AI_ALL | AI_ADDRCONFIG | AI_NUMERICSERV;
+ if ((flags & mask) != flags)
+ return EAI_BADFLAGS;
+
+ switch (family) {
+ case AF_INET:
+ case AF_INET6:
+ case AF_UNSPEC:
+ break;
+ default:
+ return EAI_FAMILY;
}
- port = htons(port);
}
- if (!host) {
- if (family == AF_UNSPEC) family = AF_INET;
- buf = calloc(sizeof *buf, 1+EXTRA);
- if (!buf) return EAI_MEMORY;
- buf->ai.ai_protocol = proto;
- buf->ai.ai_socktype = type;
- buf->ai.ai_addr = (void *)&buf->sa;
- buf->ai.ai_addrlen = family==AF_INET6 ? sizeof sa.sin6 : sizeof sa.sin;
- buf->ai.ai_family = family;
- buf->sa.sin.sin_family = family;
- buf->sa.sin.sin_port = port;
- if (!(flags & AI_PASSIVE)) {
- if (family == AF_INET) {
- 0[(uint8_t*)&buf->sa.sin.sin_addr.s_addr]=127;
- 3[(uint8_t*)&buf->sa.sin.sin_addr.s_addr]=1;
- } else buf[0].sa.sin6.sin6_addr.s6_addr[15] = 1;
+ if (flags & AI_ADDRCONFIG) {
+ /* Define the "an address is configured" condition for address
+ * families via ability to create a socket for the family plus
+ * routability of the loopback address for the family. */
+ static const struct sockaddr_in lo4 = {
+ .sin_family = AF_INET, .sin_port = 65535,
+ .sin_addr.s_addr = __BYTE_ORDER == __BIG_ENDIAN
+ ? 0x7f000001 : 0x0100007f
+ };
+ static const struct sockaddr_in6 lo6 = {
+ .sin6_family = AF_INET6, .sin6_port = 65535,
+ .sin6_addr = IN6ADDR_LOOPBACK_INIT
+ };
+ int tf[2] = { AF_INET, AF_INET6 };
+ const void *ta[2] = { &lo4, &lo6 };
+ socklen_t tl[2] = { sizeof lo4, sizeof lo6 };
+ for (i=0; i<2; i++) {
+ if (family==tf[1-i]) continue;
+ int s = socket(tf[i], SOCK_CLOEXEC|SOCK_DGRAM,
+ IPPROTO_UDP);
+ if (s>=0) {
+ int cs;
+ pthread_setcancelstate(
+ PTHREAD_CANCEL_DISABLE, &cs);
+ int r = connect(s, ta[i], tl[i]);
+ int saved_errno = errno;
+ pthread_setcancelstate(cs, 0);
+ close(s);
+ if (!r) continue;
+ errno = saved_errno;
+ }
+ switch (errno) {
+ case EADDRNOTAVAIL:
+ case EAFNOSUPPORT:
+ case EHOSTUNREACH:
+ case ENETDOWN:
+ case ENETUNREACH:
+ break;
+ default:
+ return EAI_SYSTEM;
+ }
+ if (family == tf[i]) no_family = 1;
+ family = tf[1-i];
}
- *res = &buf->ai;
- return 0;
- }
-
- if (!*host) return EAI_NONAME;
-
- /* Try as a numeric address */
- if (__ipparse(&sa, family, host) >= 0) {
- buf = calloc(sizeof *buf, 1+EXTRA);
- if (!buf) return EAI_MEMORY;
- family = sa.sin.sin_family;
- buf->ai.ai_protocol = proto;
- buf->ai.ai_socktype = type;
- buf->ai.ai_addr = (void *)&buf->sa;
- buf->ai.ai_addrlen = family==AF_INET6 ? sizeof sa.sin6 : sizeof sa.sin;
- buf->ai.ai_family = family;
- buf->ai.ai_canonname = (char *)host;
- buf->sa = sa;
- buf->sa.sin.sin_port = port;
- *res = &buf->ai;
- return 0;
- }
-
- if (flags & AI_NUMERICHOST) return EAI_NONAME;
-
- f = __fopen_rb_ca("/etc/hosts", &_f, _buf, sizeof _buf);
- if (f) while (fgets(line, sizeof line, f)) {
- char *p;
- size_t l = strlen(host);
-
- if ((p=strchr(line, '#'))) *p++='\n', *p=0;
- for(p=line+1; (p=strstr(p, host)) &&
- (!isspace(p[-1]) || !isspace(p[l])); p++);
- if (!p) continue;
- __fclose_ca(f);
-
- /* Isolate IP address to parse */
- for (p=line; *p && !isspace(*p); p++);
- *p++ = 0;
- if (__ipparse(&sa, family, line) < 0) return EAI_NONAME;
-
- /* Allocate and fill result buffer */
- buf = calloc(sizeof *buf, 1+EXTRA);
- if (!buf) return EAI_MEMORY;
- family = sa.sin.sin_family;
- buf->ai.ai_protocol = proto;
- buf->ai.ai_socktype = type;
- buf->ai.ai_addr = (void *)&buf->sa;
- buf->ai.ai_addrlen = family==AF_INET6 ? sizeof sa.sin6 : sizeof sa.sin;
- buf->ai.ai_family = family;
- buf->sa = sa;
- buf->sa.sin.sin_port = port;
-
- /* Extract first name as canonical name */
- for (; *p && isspace(*p); p++);
- buf->ai.ai_canonname = (void *)(buf+1);
- snprintf(buf->ai.ai_canonname, 256, "%s", p);
- for (p=buf->ai.ai_canonname; *p && !isspace(*p); p++);
- *p = 0;
- if (!is_valid(buf->ai.ai_canonname))
- buf->ai.ai_canonname = 0;
-
- *res = &buf->ai;
- return 0;
}
- if (f) __fclose_ca(f);
-#if 0
- f = __fopen_rb_ca("/etc/resolv.conf", &_f, _buf, sizeof _buf);
- if (f) while (fgets(line, sizeof line, f)) {
- if (!isspace(line[10]) || (strncmp(line, "search", 6)
- && strncmp(line, "domain", 6))) continue;
- }
- if (f) __fclose_ca(f);
-#endif
+ nservs = __lookup_serv(ports, serv, proto, socktype, flags);
+ if (nservs < 0) return nservs;
- /* Perform one or more DNS queries for host */
- memset(reply, 0, sizeof reply);
- result = __dns_query(reply, host, family, 0);
- if (result < 0) return result;
+ naddrs = __lookup_name(addrs, canon, host, family, flags);
+ if (naddrs < 0) return naddrs;
- cnt = __dns_count_addrs(reply, result);
- if (cnt <= 0) return EAI_NONAME;
+ if (no_family) return EAI_NODATA;
- buf = calloc(sizeof *buf, cnt+EXTRA);
- if (!buf) return EAI_MEMORY;
+ nais = nservs * naddrs;
+ canon_len = strlen(canon);
+ out = calloc(1, nais * sizeof(*out) + canon_len + 1);
+ if (!out) return EAI_MEMORY;
- i = 0;
- if (family != AF_INET6) {
- j = __dns_get_rr(&buf[i].sa.sin.sin_addr, sizeof *buf, 4, cnt-i, reply, RR_A, 0);
- while (j--) buf[i++].sa.sin.sin_family = AF_INET;
+ if (canon_len) {
+ outcanon = (void *)&out[nais];
+ memcpy(outcanon, canon, canon_len+1);
+ } else {
+ outcanon = 0;
}
- if (family != AF_INET) {
- j = __dns_get_rr(&buf[i].sa.sin6.sin6_addr, sizeof *buf, 16, cnt-i, reply, RR_AAAA, 0);
- while (j--) buf[i++].sa.sin.sin_family = AF_INET6;
- }
- if (result>1) {
- j = __dns_get_rr(&buf[i].sa.sin.sin_addr, sizeof *buf, 4, cnt-i, reply+512, RR_A, 0);
- while (j--) buf[i++].sa.sin.sin_family = AF_INET;
- j = __dns_get_rr(&buf[i].sa.sin6.sin6_addr, sizeof *buf, 16, cnt-i, reply+512, RR_AAAA, 0);
- while (j--) buf[i++].sa.sin.sin_family = AF_INET6;
- }
-
- if (__dns_get_rr((void *)&buf[cnt], 0, 256, 1, reply, RR_CNAME, 1) < 0)
- strcpy((void *)&buf[cnt], host);
- for (i=0; i<cnt; i++) {
- buf[i].ai.ai_protocol = proto;
- buf[i].ai.ai_socktype = type;
- buf[i].ai.ai_addr = (void *)&buf[i].sa;
- buf[i].ai.ai_addrlen = buf[i].sa.sin.sin_family==AF_INET6
- ? sizeof sa.sin6 : sizeof sa.sin;
- buf[i].ai.ai_family = buf[i].sa.sin.sin_family;
- buf[i].sa.sin.sin_port = port;
- buf[i].ai.ai_next = &buf[i+1].ai;
- buf[i].ai.ai_canonname = (void *)&buf[cnt];
+ for (k=i=0; i<naddrs; i++) for (j=0; j<nservs; j++, k++) {
+ out[k].slot = k;
+ out[k].ai = (struct addrinfo){
+ .ai_family = addrs[i].family,
+ .ai_socktype = ports[j].socktype,
+ .ai_protocol = ports[j].proto,
+ .ai_addrlen = addrs[i].family == AF_INET
+ ? sizeof(struct sockaddr_in)
+ : sizeof(struct sockaddr_in6),
+ .ai_addr = (void *)&out[k].sa,
+ .ai_canonname = outcanon };
+ if (k) out[k-1].ai.ai_next = &out[k].ai;
+ switch (addrs[i].family) {
+ case AF_INET:
+ out[k].sa.sin.sin_family = AF_INET;
+ out[k].sa.sin.sin_port = htons(ports[j].port);
+ memcpy(&out[k].sa.sin.sin_addr, &addrs[i].addr, 4);
+ break;
+ case AF_INET6:
+ out[k].sa.sin6.sin6_family = AF_INET6;
+ out[k].sa.sin6.sin6_port = htons(ports[j].port);
+ out[k].sa.sin6.sin6_scope_id = addrs[i].scopeid;
+ memcpy(&out[k].sa.sin6.sin6_addr, &addrs[i].addr, 16);
+ break;
+ }
}
- buf[cnt-1].ai.ai_next = 0;
- *res = &buf->ai;
-
+ out[0].ref = nais;
+ *res = &out->ai;
return 0;
}
projects / musl / blobdiff