net: Refer to correct man page in stringify_port().

[paraslash.git] / net.c

diff --git a/net.c b/net.c
index e1951e5e8d87501b1ef9096d3f3df64117e904f0..1c0e7ffa13cec1043babf65bf3a951656dabad8c 100644 (file)
--- a/net.c
+++ b/net.c
@@ -18,6 +18,13 @@
 #include "list.h"
 #include "fd.h"
 
+/* Whether the given address conforms to the IPv4 address format. */
+static inline bool is_valid_ipv4_address(const char *address)
+{
+       struct in_addr test_it;
+       return inet_pton(AF_INET, address, &test_it) != 0;
+}
+
 /**
  * Parse and validate IPv4 address/netmask string.
  *
@@ -77,6 +84,13 @@ static bool is_v4_dot_quad(const char *address)
        return result;
 }
 
+/* Whether a string conforms to IPv6 address format (RFC 4291). */
+static inline bool is_valid_ipv6_address(const char *address)
+{
+       struct in6_addr test_it;
+       return inet_pton(AF_INET6, address, &test_it) != 0;
+}
+
 /**
  * Perform basic syntax checking on the host-part of an URL:
  *
@@ -205,7 +219,7 @@ char *format_url(const char *url, int default_port)
  * \param transport Transport protocol name (e.g. "udp", "tcp"), or NULL.
  * \return Pointer to static result buffer.
  *
- * \sa getservent(3), services(5), nsswitch.conf(5).
+ * \sa getservbyport(3), services(5), nsswitch.conf(5).
  */
 const char *stringify_port(int port, const char *transport)
 {
@@ -224,6 +238,10 @@ const char *stringify_port(int port, const char *transport)
        return service;
 }
 
+#ifndef SOCK_DCCP
+#define SOCK_DCCP 6 /**< Linux socket type. */
+#endif
+
 /**
  * Determine the socket type for a given layer-4 protocol.
  *
@@ -273,7 +291,12 @@ struct pre_conn_opt {
        struct list_head node;          /**< FIFO, as sockopt order matters. */
 };
 
-/** FIFO list of pre-connection socket options to be set */
+/**
+ * List of pre-connection socket options to be set.
+ *
+ * This list contains transport-layer independent encapsulation of socket
+ * options that need to be registered prior to setting up a connection.
+ */
 struct flowopts {
        struct list_head sockopts;
 };
@@ -286,7 +309,7 @@ struct flowopts {
  */
 struct flowopts *flowopt_new(void)
 {
-       struct flowopts *new = para_malloc(sizeof(*new));
+       struct flowopts *new = alloc(sizeof(*new));
 
        init_list_head(&new->sockopts);
        return new;
@@ -307,7 +330,7 @@ struct flowopts *flowopt_new(void)
 void flowopt_add(struct flowopts *fo, int lev, int opt,
                const char *name, const void *val, int len)
 {
-       struct pre_conn_opt *new = para_malloc(sizeof(*new));
+       struct pre_conn_opt *new = alloc(sizeof(*new));
 
        new->sock_option = opt;
        new->sock_level  = lev;
@@ -317,7 +340,7 @@ void flowopt_add(struct flowopts *fo, int lev, int opt,
                new->opt_val = NULL;
                new->opt_len = 0;
        } else {
-               new->opt_val = para_malloc(len);
+               new->opt_val = alloc(len);
                new->opt_len = len;
                memcpy(new->opt_val, val, len);
        }
@@ -509,7 +532,7 @@ int makesock(unsigned l4type, bool passive, const char *host, uint16_t port_numb
        if (ai)
                freeaddrinfo(ai);
        if (ret < 0) {
-               PARA_ERROR_LOG("can not create %s socket %s#%d.\n",
+               PARA_NOTICE_LOG("can not create %s socket %s#%d.\n",
                layer4_name(l4type), host? host : (passive?
                "[loopback]" : "[localhost]"), port_number);
        }
@@ -801,25 +824,21 @@ int recv_buffer(int fd, char *buf, size_t size)
  * Wrapper around the accept system call.
  *
  * \param fd The listening socket.
- * \param rfds An optional fd_set pointer.
  * \param addr Structure which is filled in with the address of the peer socket.
  * \param size Should contain the size of the structure pointed to by \a addr.
  * \param new_fd Result pointer.
  *
- * Accept incoming connections on \a addr, retry if interrupted. If \a rfds is
- * not \p NULL, return 0 if \a fd is not set in \a rfds without calling accept().
+ * Accept incoming connections on addr, retry if interrupted.
  *
  * \return Negative on errors, zero if no connections are present to be accepted,
  * one otherwise.
  *
  * \sa accept(2).
  */
-int para_accept(int fd, fd_set *rfds, void *addr, socklen_t size, int *new_fd)
+int para_accept(int fd, void *addr, socklen_t size, int *new_fd)
 {
        int ret;
 
-       if (rfds && !FD_ISSET(fd, rfds))
-               return 0;
        do
                ret = accept(fd, (struct sockaddr *) addr, &size);
        while (ret < 0 && errno == EINTR);
@@ -833,6 +852,10 @@ int para_accept(int fd, fd_set *rfds, void *addr, socklen_t size, int *new_fd)
        return -ERRNO_TO_PARA_ERROR(errno);
 }
 
+#ifndef DCCP_SOCKOPT_AVAILABLE_CCIDS
+#define DCCP_SOCKOPT_AVAILABLE_CCIDS 12 /**< List of supported CCIDs. */
+#endif
+
 /**
  * Probe the list of DCCP CCIDs configured on this host.
  * \param ccid_array Pointer to return statically allocated array in.
@@ -847,7 +870,7 @@ int dccp_available_ccids(uint8_t **ccid_array)
        socklen_t nccids = sizeof(ccids);
        int ret, fd;
 
-       ret = fd = makesock(IPPROTO_DCCP, 1, NULL, 0, NULL);
+       ret = fd = makesock(IPPROTO_DCCP, true /* passive */, NULL, 0, NULL);
        if (ret < 0)
                return ret;
 
@@ -865,6 +888,18 @@ int dccp_available_ccids(uint8_t **ccid_array)
        return nccids;
 }
 
+/**
+ * The buffer size of the sun_path component of struct sockaddr_un.
+ *
+ * While glibc doesn't define UNIX_PATH_MAX, it documents it has being limited
+ * to 108 bytes. On NetBSD it is only 104 bytes though. We trust UNIX_PATH_MAX
+ * if it is defined and use the size of the ->sun_path member otherwise. This
+ * should be safe everywhere.
+ */
+#ifndef UNIX_PATH_MAX
+#define UNIX_PATH_MAX (sizeof(((struct sockaddr_un *)0)->sun_path))
+#endif
+
 /*
  * Prepare a structure for AF_UNIX socket addresses.
  *