diff options
Diffstat (limited to 'ext/socket/lib/socket.rb')
| -rw-r--r-- | ext/socket/lib/socket.rb | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/ext/socket/lib/socket.rb b/ext/socket/lib/socket.rb index eecdc7d4b8..de542223c6 100644 --- a/ext/socket/lib/socket.rb +++ b/ext/socket/lib/socket.rb @@ -333,9 +333,10 @@ class BasicSocket < IO # _flags_ is zero or more of the +MSG_+ options. # The result, _mesg_, is the data received. # - # When recvfrom(2) returns 0, Socket#recv_nonblock returns - # an empty string as data. - # The meaning depends on the socket: EOF on TCP, empty packet on UDP, etc. + # When recvfrom(2) returns 0, Socket#recv_nonblock returns nil. + # In most cases it means the connection was closed, but for UDP connections + # it may mean an empty packet was received, as the underlying API makes + # it impossible to distinguish these two cases. # # === Parameters # * +maxlen+ - the number of bytes to receive from the socket @@ -480,9 +481,10 @@ class Socket < BasicSocket # The second element, _sender_addrinfo_, contains protocol-specific address # information of the sender. # - # When recvfrom(2) returns 0, Socket#recvfrom_nonblock returns - # an empty string as data. - # The meaning depends on the socket: EOF on TCP, empty packet on UDP, etc. + # When recvfrom(2) returns 0, Socket#recv_nonblock returns nil. + # In most cases it means the connection was closed, but for UDP connections + # it may mean an empty packet was received, as the underlying API makes + # it impossible to distinguish these two cases. # # === Parameters # * +maxlen+ - the maximum number of bytes to receive from the socket @@ -1229,9 +1231,10 @@ class UDPSocket < IPSocket # The first element of the results, _mesg_, is the data received. # The second element, _sender_inet_addr_, is an array to represent the sender address. # - # When recvfrom(2) returns 0, - # Socket#recvfrom_nonblock returns an empty string as data. - # It means an empty packet. + # When recvfrom(2) returns 0, Socket#recv_nonblock returns nil. + # In most cases it means the connection was closed, but it may also mean + # an empty packet was received, as the underlying API makes + # it impossible to distinguish these two cases. # # === Parameters # * +maxlen+ - the number of bytes to receive from the socket |