main part of the native protocol

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@31 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/util.c

@@ -0,0 +1,62 @@
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include <fcntl.h>
+
+#include "util.h"
+
+void make_nonblock_fd(int fd) {
+    int v;
+
+    if ((v = fcntl(fd, F_GETFL)) >= 0)
+        if (!(v & O_NONBLOCK))
+            fcntl(fd, F_SETFL, v|O_NONBLOCK);
+}
+
+void peer_to_string(char *c, size_t l, int fd) {
+    struct stat st;
+
+    assert(c && l && fd >= 0);
+    
+    if (fstat(fd, &st) < 0) {
+        snprintf(c, l, "Invalid client fd");
+        return;
+    }
+
+    if (S_ISSOCK(st.st_mode)) {
+        union {
+            struct sockaddr sa;
+            struct sockaddr_in in;
+            struct sockaddr_un un;
+        } sa;
+        socklen_t sa_len = sizeof(sa);
+        
+        if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
+
+            if (sa.sa.sa_family == AF_INET) {
+                uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
+                
+                snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
+                         ip >> 24,
+                         (ip >> 16) & 0xFF,
+                         (ip >> 8) & 0xFF,
+                         ip & 0xFF,
+                         ntohs(sa.in.sin_port));
+                return;
+            } else if (sa.sa.sa_family == AF_LOCAL) {
+                snprintf(c, l, "UNIX client for %s", sa.un.sun_path);
+                return;
+            }
+
+        }
+        snprintf(c, l, "Unknown network client");
+        return;
+    } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
+        snprintf(c, l, "STDIN/STDOUT client");
+        return;
+    }
+
+    snprintf(c, l, "Unknown client");
+}