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Unified Diff: fusl/src/network/lookup_serv.c

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: fusl/src/network/lookup_serv.c
diff --git a/fusl/src/network/lookup_serv.c b/fusl/src/network/lookup_serv.c
new file mode 100644
index 0000000000000000000000000000000000000000..66ebaea25a3fb492e0b9b35d9b803154beaba473
--- /dev/null
+++ b/fusl/src/network/lookup_serv.c
@@ -0,0 +1,113 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "lookup.h"
+#include "stdio_impl.h"
+
+int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int proto, int socktype, int flags)
+{
+ char line[128];
+ int cnt = 0;
+ char *p, *z = "";
+ unsigned long port = 0;
+
+ switch (socktype) {
+ case SOCK_STREAM:
+ switch (proto) {
+ case 0:
+ proto = IPPROTO_TCP;
+ case IPPROTO_TCP:
+ break;
+ default:
+ return EAI_SERVICE;
+ }
+ break;
+ case SOCK_DGRAM:
+ switch (proto) {
+ case 0:
+ proto = IPPROTO_UDP;
+ case IPPROTO_UDP:
+ break;
+ default:
+ return EAI_SERVICE;
+ }
+ case 0:
+ break;
+ default:
+ if (name) return EAI_SERVICE;
+ buf[0].port = 0;
+ buf[0].proto = proto;
+ buf[0].socktype = socktype;
+ return 1;
+ }
+
+ if (name) {
+ if (!*name) return EAI_SERVICE;
+ port = strtoul(name, &z, 10);
+ }
+ if (!*z) {
+ if (port > 65535) return EAI_SERVICE;
+ if (proto != IPPROTO_UDP) {
+ buf[cnt].port = port;
+ buf[cnt].socktype = SOCK_STREAM;
+ buf[cnt++].proto = IPPROTO_TCP;
+ }
+ if (proto != IPPROTO_TCP) {
+ buf[cnt].port = port;
+ buf[cnt].socktype = SOCK_DGRAM;
+ buf[cnt++].proto = IPPROTO_UDP;
+ }
+ return cnt;
+ }
+
+ if (flags & AI_NUMERICSERV) return EAI_SERVICE;
+
+ size_t l = strlen(name);
+
+ unsigned char _buf[1032];
+ FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
+ if (!f) switch (errno) {
+ case ENOENT:
+ case ENOTDIR:
+ case EACCES:
+ return EAI_SERVICE;
+ default:
+ return EAI_SYSTEM;
+ }
+
+ while (fgets(line, sizeof line, f) && cnt < MAXSERVS) {
+ if ((p=strchr(line, '#'))) *p++='\n', *p=0;
+
+ /* Find service name */
+ for(p=line; (p=strstr(p, name)); p++) {
+ if (p>line && !isspace(p[-1])) continue;
+ if (p[l] && !isspace(p[l])) continue;
+ break;
+ }
+ if (!p) continue;
+
+ /* Skip past canonical name at beginning of line */
+ for (p=line; *p && !isspace(*p); p++);
+
+ port = strtoul(p, &z, 10);
+ if (port > 65535 || z==p) continue;
+ if (!strncmp(z, "/udp", 4)) {
+ if (proto == IPPROTO_TCP) continue;
+ buf[cnt].port = port;
+ buf[cnt].socktype = SOCK_DGRAM;
+ buf[cnt++].proto = IPPROTO_UDP;
+ }
+ if (!strncmp(z, "/tcp", 4)) {
+ if (proto == IPPROTO_UDP) continue;
+ buf[cnt].port = port;
+ buf[cnt].socktype = SOCK_STREAM;
+ buf[cnt++].proto = IPPROTO_TCP;
+ }
+ }
+ __fclose_ca(f);
+ return cnt > 0 ? cnt : EAI_SERVICE;
+}
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