[fusl] clang-format fusl

fusl/src/network/getnameinfo.c

 #include <netdb.h>
 #include <limits.h>
 #include <string.h>
 #include <stdio.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <net/if.h>
 #include <ctype.h>
 #include "lookup.h"
 #include "stdio_impl.h"
 
-int __dns_parse(const unsigned char *, int, int (*)(void *, int, const void *, int, const void *), void *);
-int __dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
-int __res_mkquery(int, const char *, int, int, const unsigned char *, int, const unsigned char*, unsigned char *, int);
-int __res_send(const unsigned char *, int, unsigned char *, int);
+int __dns_parse(const unsigned char*,
+                int,
+                int (*)(void*, int, const void*, int, const void*),
+                void*);
+int __dn_expand(const unsigned char*,
+                const unsigned char*,
+                const unsigned char*,
+                char*,
+                int);
+int __res_mkquery(int,
+                  const char*,
+                  int,
+                  int,
+                  const unsigned char*,
+                  int,
+                  const unsigned char*,
+                  unsigned char*,
+                  int);
+int __res_send(const unsigned char*, int, unsigned char*, int);
 
 #define PTR_MAX (64 + sizeof ".in-addr.arpa")
 #define RR_PTR 12
 
-static char *itoa(char *p, unsigned x) {
-        p += 3*sizeof(int);
-        *--p = 0;
-        do {
-                *--p = '0' + x % 10;
-                x /= 10;
-        } while (x);
-        return p;
-}
-
-static void mkptr4(char *s, const unsigned char *ip)
-{
-        sprintf(s, "%d.%d.%d.%d.in-addr.arpa",
-                ip[3], ip[2], ip[1], ip[0]);
-}
-
-static void mkptr6(char *s, const unsigned char *ip)
-{
-        static const char xdigits[] = "0123456789abcdef";
-        int i;
-        for (i=15; i>=0; i--) {
-                *s++ = xdigits[ip[i]&15]; *s++ = '.';
-                *s++ = xdigits[ip[i]>>4]; *s++ = '.';
-        }
-        strcpy(s, "ip6.arpa");
-}
-
-static void reverse_hosts(char *buf, const unsigned char *a, unsigned scopeid, int family)
-{
-        char line[512], *p, *z;
-        unsigned char _buf[1032], atmp[16];
-        struct address iplit;
-        FILE _f, *f = __fopen_rb_ca("/etc/hosts", &_f, _buf, sizeof _buf);
-        if (!f) return;
-        if (family == AF_INET) {
-                memcpy(atmp+12, a, 4);
-                memcpy(atmp, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
-                a = atmp;
-        }
-        while (fgets(line, sizeof line, f)) {
-                if ((p=strchr(line, '#'))) *p++='\n', *p=0;
-
-                for (p=line; *p && !isspace(*p); p++);
-                *p++ = 0;
-                if (__lookup_ipliteral(&iplit, line, AF_UNSPEC)<=0)
-                        continue;
-
-                if (iplit.family == AF_INET) {
-                        memcpy(iplit.addr+12, iplit.addr, 4);
-                        memcpy(iplit.addr, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
-                        iplit.scopeid = 0;
-                }
-
-                if (memcmp(a, iplit.addr, 16) || iplit.scopeid != scopeid)
-                        continue;
-                        
-                for (; *p && isspace(*p); p++);
-                for (z=p; *z && !isspace(*z); z++);
-                *z = 0;
-                if (z-p < 256) {
-                        memcpy(buf, p, z-p+1);
-                        break;
-                }
-        }
-        __fclose_ca(f);
-}
-
-static void reverse_services(char *buf, int port, int dgram)
-{
-        unsigned long svport;
-        char line[128], *p, *z;
-        unsigned char _buf[1032];
-        FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
-        if (!f) return;
-        while (fgets(line, sizeof line, f)) {
-                if ((p=strchr(line, '#'))) *p++='\n', *p=0;
-
-                for (p=line; *p && !isspace(*p); p++);
-                if (!*p) continue;
-                *p++ = 0;
-                svport = strtoul(p, &z, 10);
-
-                if (svport != port || z==p) continue;
-                if (dgram && strncmp(z, "/udp", 4)) continue;
-                if (!dgram && strncmp(z, "/tcp", 4)) continue;
-                if (p-line > 32) continue;
-
-                memcpy(buf, line, p-line);
-                break;
-        }
-        __fclose_ca(f);
-}
-
-static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet)
-{
-        if (rr != RR_PTR) return 0;
-        if (__dn_expand(packet, (const unsigned char *)packet + 512,
-            data, c, 256) <= 0)
-                *(char *)c = 0;
-        return 0;
-        
-}
-
-int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl,
-        char *restrict node, socklen_t nodelen,
-        char *restrict serv, socklen_t servlen,
-        int flags)
-{
-        char ptr[PTR_MAX];
-        char buf[256], num[3*sizeof(int)+1];
-        int af = sa->sa_family;
-        unsigned char *a;
-        unsigned scopeid;
-
-        switch (af) {
-        case AF_INET:
-                a = (void *)&((struct sockaddr_in *)sa)->sin_addr;
-                if (sl < sizeof(struct sockaddr_in)) return EAI_FAMILY;
-                mkptr4(ptr, a);
-                scopeid = 0;
-                break;
-        case AF_INET6:
-                a = (void *)&((struct sockaddr_in6 *)sa)->sin6_addr;
-                if (sl < sizeof(struct sockaddr_in6)) return EAI_FAMILY;
-                if (memcmp(a, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12))
-                        mkptr6(ptr, a);
-                else
-                        mkptr4(ptr, a+12);
-                scopeid = ((struct sockaddr_in6 *)sa)->sin6_scope_id;
-                break;
-        default:
-                return EAI_FAMILY;
-        }
-
-        if (node && nodelen) {
-                buf[0] = 0;
-                if (!(flags & NI_NUMERICHOST)) {
-                        reverse_hosts(buf, a, scopeid, af);
-                }
-                if (!*buf && !(flags & NI_NUMERICHOST)) {
-                        unsigned char query[18+PTR_MAX], reply[512];
-                        int qlen = __res_mkquery(0, ptr, 1, RR_PTR,
-                                0, 0, 0, query, sizeof query);
-                        int rlen = __res_send(query, qlen, reply, sizeof reply);
-                        buf[0] = 0;
-                        if (rlen > 0)
-                                __dns_parse(reply, rlen, dns_parse_callback, buf);
-                }
-                if (!*buf) {
-                        if (flags & NI_NAMEREQD) return EAI_NONAME;
-                        inet_ntop(af, a, buf, sizeof buf);
-                        if (scopeid) {
-                                char *p = 0, tmp[IF_NAMESIZE+1];
-                                if (!(flags & NI_NUMERICSCOPE) &&
-                                    (IN6_IS_ADDR_LINKLOCAL(a) ||
-                                     IN6_IS_ADDR_MC_LINKLOCAL(a)))
-                                        p = if_indextoname(scopeid, tmp+1);
-                                if (!p)
-                                        p = itoa(num, scopeid);
-                                *--p = '%';
-                                strcat(buf, p);
-                        }
-                }
-                if (strlen(buf) >= nodelen) return EAI_OVERFLOW;
-                strcpy(node, buf);
-        }
-
-        if (serv && servlen) {
-                char *p = buf;
-                int port = ntohs(((struct sockaddr_in *)sa)->sin_port);
-                buf[0] = 0;
-                if (!(flags & NI_NUMERICSERV))
-                        reverse_services(buf, port, flags & NI_DGRAM);
-                if (!*p)
-                        p = itoa(num, port);
-                if (strlen(p) >= servlen)
-                        return EAI_OVERFLOW;
-                strcpy(serv, p);
-        }
-
-        return 0;
-}
+static char* itoa(char* p, unsigned x) {
+  p += 3 * sizeof(int);
+  *--p = 0;
+  do {
+    *--p = '0' + x % 10;
+    x /= 10;
+  } while (x);
+  return p;
+}
+
+static void mkptr4(char* s, const unsigned char* ip) {
+  sprintf(s, "%d.%d.%d.%d.in-addr.arpa", ip[3], ip[2], ip[1], ip[0]);
+}
+
+static void mkptr6(char* s, const unsigned char* ip) {
+  static const char xdigits[] = "0123456789abcdef";
+  int i;
+  for (i = 15; i >= 0; i--) {
+    *s++ = xdigits[ip[i] & 15];
+    *s++ = '.';
+    *s++ = xdigits[ip[i] >> 4];
+    *s++ = '.';
+  }
+  strcpy(s, "ip6.arpa");
+}
+
+static void reverse_hosts(char* buf,
+                          const unsigned char* a,
+                          unsigned scopeid,
+                          int family) {
+  char line[512], *p, *z;
+  unsigned char _buf[1032], atmp[16];
+  struct address iplit;
+  FILE _f, *f = __fopen_rb_ca("/etc/hosts", &_f, _buf, sizeof _buf);
+  if (!f)
+    return;
+  if (family == AF_INET) {
+    memcpy(atmp + 12, a, 4);
+    memcpy(atmp, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+    a = atmp;
+  }
+  while (fgets(line, sizeof line, f)) {
+    if ((p = strchr(line, '#')))
+      *p++ = '\n', *p = 0;
+
+    for (p = line; *p && !isspace(*p); p++)
+      ;
+    *p++ = 0;
+    if (__lookup_ipliteral(&iplit, line, AF_UNSPEC) <= 0)
+      continue;
+
+    if (iplit.family == AF_INET) {
+      memcpy(iplit.addr + 12, iplit.addr, 4);
+      memcpy(iplit.addr, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12);
+      iplit.scopeid = 0;
+    }
+
+    if (memcmp(a, iplit.addr, 16) || iplit.scopeid != scopeid)
+      continue;
+
+    for (; *p && isspace(*p); p++)
+      ;
+    for (z = p; *z && !isspace(*z); z++)
+      ;
+    *z = 0;
+    if (z - p < 256) {
+      memcpy(buf, p, z - p + 1);
+      break;
+    }
+  }
+  __fclose_ca(f);
+}
+
+static void reverse_services(char* buf, int port, int dgram) {
+  unsigned long svport;
+  char line[128], *p, *z;
+  unsigned char _buf[1032];
+  FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
+  if (!f)
+    return;
+  while (fgets(line, sizeof line, f)) {
+    if ((p = strchr(line, '#')))
+      *p++ = '\n', *p = 0;
+
+    for (p = line; *p && !isspace(*p); p++)
+      ;
+    if (!*p)
+      continue;
+    *p++ = 0;
+    svport = strtoul(p, &z, 10);
+
+    if (svport != port || z == p)
+      continue;
+    if (dgram && strncmp(z, "/udp", 4))
+      continue;
+    if (!dgram && strncmp(z, "/tcp", 4))
+      continue;
+    if (p - line > 32)
+      continue;
+
+    memcpy(buf, line, p - line);
+    break;
+  }
+  __fclose_ca(f);
+}
+
+static int dns_parse_callback(void* c,
+                              int rr,
+                              const void* data,
+                              int len,
+                              const void* packet) {
+  if (rr != RR_PTR)
+    return 0;
+  if (__dn_expand(packet, (const unsigned char*)packet + 512, data, c, 256) <=
+      0)
+    *(char*)c = 0;
+  return 0;
+}
+
+int getnameinfo(const struct sockaddr* restrict sa,
+                socklen_t sl,
+                char* restrict node,
+                socklen_t nodelen,
+                char* restrict serv,
+                socklen_t servlen,
+                int flags) {
+  char ptr[PTR_MAX];
+  char buf[256], num[3 * sizeof(int) + 1];
+  int af = sa->sa_family;
+  unsigned char* a;
+  unsigned scopeid;
+
+  switch (af) {
+    case AF_INET:
+      a = (void*)&((struct sockaddr_in*)sa)->sin_addr;
+      if (sl < sizeof(struct sockaddr_in))
+        return EAI_FAMILY;
+      mkptr4(ptr, a);
+      scopeid = 0;
+      break;
+    case AF_INET6:
+      a = (void*)&((struct sockaddr_in6*)sa)->sin6_addr;
+      if (sl < sizeof(struct sockaddr_in6))
+        return EAI_FAMILY;
+      if (memcmp(a, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12))
+        mkptr6(ptr, a);
+      else
+        mkptr4(ptr, a + 12);
+      scopeid = ((struct sockaddr_in6*)sa)->sin6_scope_id;
+      break;
+    default:
+      return EAI_FAMILY;
+  }
+
+  if (node && nodelen) {
+    buf[0] = 0;
+    if (!(flags & NI_NUMERICHOST)) {
+      reverse_hosts(buf, a, scopeid, af);
+    }
+    if (!*buf && !(flags & NI_NUMERICHOST)) {
+      unsigned char query[18 + PTR_MAX], reply[512];
+      int qlen = __res_mkquery(0, ptr, 1, RR_PTR, 0, 0, 0, query, sizeof query);
+      int rlen = __res_send(query, qlen, reply, sizeof reply);
+      buf[0] = 0;
+      if (rlen > 0)
+        __dns_parse(reply, rlen, dns_parse_callback, buf);
+    }
+    if (!*buf) {
+      if (flags & NI_NAMEREQD)
+        return EAI_NONAME;
+      inet_ntop(af, a, buf, sizeof buf);
+      if (scopeid) {
+        char *p = 0, tmp[IF_NAMESIZE + 1];
+        if (!(flags & NI_NUMERICSCOPE) &&
+            (IN6_IS_ADDR_LINKLOCAL(a) || IN6_IS_ADDR_MC_LINKLOCAL(a)))
+          p = if_indextoname(scopeid, tmp + 1);
+        if (!p)
+          p = itoa(num, scopeid);
+        *--p = '%';
+        strcat(buf, p);
+      }
+    }
+    if (strlen(buf) >= nodelen)
+      return EAI_OVERFLOW;
+    strcpy(node, buf);
+  }
+
+  if (serv && servlen) {
+    char* p = buf;
+    int port = ntohs(((struct sockaddr_in*)sa)->sin_port);
+    buf[0] = 0;
+    if (!(flags & NI_NUMERICSERV))
+      reverse_services(buf, port, flags & NI_DGRAM);
+    if (!*p)
+      p = itoa(num, port);
+    if (strlen(p) >= servlen)
+      return EAI_OVERFLOW;
+    strcpy(serv, p);
+  }
+
+  return 0;
+}