{"id":143,"date":"2010-04-17T23:15:52","date_gmt":"2010-04-18T08:15:52","guid":{"rendered":"\/blog\/?p=143"},"modified":"2023-09-21T09:39:19","modified_gmt":"2023-09-21T00:39:19","slug":"unix-socket-faq","status":"publish","type":"post","link":"https:\/\/hasu0707.duckdns.org\/blog\/?p=143","title":{"rendered":"UNIX Socket FAQ"},"content":{"rendered":"\n
    \n
  1. \uc77c\ubc18 \uc815\ubcf4\uc640 \uac1c\ub150<\/A> \n
      \n
    1. \uc774 FAQ\uc5d0 \ub300\ud558\uc5ec<\/A> \n
    2. \ub204\uad6c\ub97c \uc704\ud55c FAQ \uc778\uac00?<\/A> \n
    3. \uc18c\ucf13\uc740 \ubb34\uc5c7\uc778\uac00?<\/A> \n
    4. \uc18c\ucf13\uc740 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uac00?<\/A> \n
    5. \ucc45\uc5d0 \uc788\ub294 \uc18c\uc2a4\ucf54\ub4dc\ub97c \uad6c\ud560 \uc218 \uc788\ub294\ub370\uac00 \uc788\ub294\uac00?<\/A> \n
    6. \ub610 \ub2e4\ub978 \uc815\ubcf4\ub4e4\uc740 \uc5b4\ub514\uc5d0\uc11c \uad6c\ud560 \uc218 \uc788\ub294\uac00?<\/A> <\/LI><\/OL>\n
    7. \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84 \uc591\ucabd\uc5d0 \uad00\ud55c \uc9c8\ubb38 (TCP\/SOCK_STREAM) <\/A>\n
        \n
      1. \uc5b8\uc81c \uc0c1\ub300\ubc29\ucabd \uc18c\ucf13\uc774 \ub04a\uacbc\ub294\uc9c0 \uc54c \uc218 \uc788\ub294 \ubc29\ubc95\uc774 \uc788\ub294\uac00?<\/A> \n
      2. bind()\uc758 \ub450 \ubc88\uc9f8 \ud30c\ub77c\uba54\ud130\ub294 \ubb34\uc5c7\uc778\uac00?<\/A> \n
      3. \uc8fc\uc5b4\uc9c4 \uc11c\ube44\uc2a4\uc758 port\ubc88\ud638\ub97c \uc5bb\ub294 \ubc29\ubc95\uc740?<\/A> \n
      4. bind() \uac00 \uc2e4\ud328 \ud588\uc744 \ub54c \uc18c\ucf13 \ub514\uc2a4\ud06c\ub9bd\ud130\ub97c \uac00\uc9c0\uace0 \ud560 \uc218 \uc788\ub294 \uc77c\uc740?<\/A> \n
      5. \uc815\ud655\ud558\uac8c \uc18c\ucf13\uc744 \ub2eb\ub294 \ubc29\ubc95\uc740 \ubb34\uc5c7\uc778\uac00?<\/A> \n
      6. \uc5b8\uc81c shutdown()\uc744 \uc368\uc57c \ud558\ub294\uac00?<\/A> \n
      7. TIME_WAIT \uc0c1\ud0dc\uc5d0 \ub300\ud574 \uc124\uba85\ud574 \ub2ec\ub77c.<\/A> \n
      8. \uc0c1\ub300\ubc29\ucabd\uc774 \uc8fd\uc5c8\ub294\uc9c0 \uc54c\uc544 \ub0b4\ub294\ub370 \uc65c \uc774\ub807\uac8c \uc624\ub798 \uac78\ub9ac\ub098?<\/A> \n
      9. select(), non-blocking I\/O \uadf8\ub9ac\uace0 SIGIO\uc758 \uc787\uc810\ub4e4\uc740 \ubb34\uc5c7\uc778\uac00?<\/A> \n
      10. read()\uac00 EPROTO \ub97c \ub9ac\ud134\ud588\ub2e4. \ubb34\uc5c7\uc778\uac00?<\/A> \n
      11. \uc18c\ucf13 \ubc84\ud37c\uc5d0 \uc788\ub294 \ub0b4\uc6a9\uc744 \uac15\uc81c\ub85c \uc804\ub2ec \ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc740 \uc5c6\ub098?<\/A> \n
      12. \uc18c\ucf13 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \uc704\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac\uac00 \uc788\ub294\uac00?<\/A> \n
      13. select\ub294 \ub370\uc774\ud130\uac00 \uc788\ub2e4\uace0 \ud558\ub294\ub370 \uc77d\uc73c\uba74 0\uc744 \ub9ac\ud134\ud55c\ub2e4?<\/A> \n
      14. select() \uc640 poll()\uc758 \ucc28\uc774\uc810\uc740 \ubb34\uc5c7\uc778\uac00?<\/A> \n
      15. \uc5b4\ub5bb\uac8c [this]\ub97c \uc18c\ucf13\uc744 \ud1b5\ud574 \ubcf4\ub0bc \uc218 \uc788\ub294\uac00?<\/A> \n
      16. TCP_NODELAY\ub294 \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ud558\ub294\uac00?<\/A> \n
      17. Nagle \uc54c\uace0\ub9ac\uc998\uc740 \uc5b4\ub5a4\uc77c\uc744 \ud558\ub294 \uac83\uc778\uac00?<\/A> \n
      18. read() \uc640 recv()\uc758 \ucc28\uc774\uc810\uc740?<\/A> \n
      19. send()\/write() \uac00 SIGPIPE \uc2e0\ud638\ub97c \uc0dd\uc131\ud560 \uc218 \uc788\ub358\ub370. \uc774 \uc2e0\ud638\ub97c \ubb34\uc2dc\ud558\uac70\ub098 EPIPE\uc624\ub958\uc5d0 \ub300\ud55c \uac80\uc0ac\ub97c \ud558\uc9c0 \uc54a\uace0 \ub2e4\ub978 \ucc98\ub9ac\ub97c \ud588\uc744\ub54c\uc758 \uc5b4\ub5a4 \uc787\uc810\uc774 \uc788\ub294\uac00? \uc2dc\uadf8\ub110\uc744 \uc7a1\ub294 \uc7a1\ub294 \ud568\uc218 \uc5d0 \ub118\uaca8\uc9c0\ub294 \uc5b4\ub5a4 \uc720\uc6a9\ud55c \ud30c\ub77c\ubbf8\ud130\uac00 \uc788\ub294\uac00?<\/A> \n
      20. chroot()\ud6c4\uc5d0 socket()\uc774 \uc2e4\ud328\ud588\ub2e4. \uc65c \uadf8\ub7f0\uac00?<\/A> \n
      21. \uc18c\ucf13 \ud638\ucd9c\ub85c \ubd80\ud130 \uc804\ub2ec\ub418\ub294 EINTR\uc744 \uc720\uc9c0\ud574\uc57c \ud558\ub294 \uc774\uc720\ub294 \ubb34\uc5c7\uc778\uac00?<\/A> \n
      22. \uc5b8\uc81c \ub098\uc758 \ud504\ub85c\uadf8\ub7a8\uc774 SIGPIPE \uc2e0\ud638\ub97c \ubc1b\uac8c \ub418\ub294\uac00?<\/A> \n
      23. \uc18c\ucf13 \uc608\uc678\ub294 \uc788\ub294\uac00? out-of-band\ub370\uc774\ud0c0\ub780 \ubb34\uc5c7\uc778\uac00?<\/A> \n
      24. \uc5b4\ub5bb\uac8c \uc644\uc804\ud55c \ub0b4 \uc2dc\uc2a4\ud15c\uc758 \ud638\uc2a4\ud2b8\uc774\ub984\uc778 (FQDN)\uc744 \uc5bb\uc744 \uc218 \uc788\ub294\uac00?<\/A><\/LI><\/OL>\n
      25. \ud074\ub77c\uc774\uc5b8\ud2b8 \uc5b4\ud50c\ub9ac\ucf00\uc774\uc158 \ub9cc\ub4e4\uae30 (TCP\/SOCK_STREAM)<\/A> \n
          \n
        1. \ubb38\uc790\uc5f4\uc744 \uc778\ud130\ub137 \uc8fc\uc18c\ub85c \ubc14\uafb8\ub294 \ubc29\ubc95\uc740?<\/A> \n
        2. firewall\uacfc proxy\uc11c\ubc84\ub97c \ud1b5\ud574\uc11c \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \uc791\ub3d9\ud558\ub3c4\ub85d \ud558\ub824\uba74 \uc5b4\ub5bb\uac8c \ud558\ub294\uac00?<\/A> \n
        3. \uc5b4\ub5bb\uac8c \uc11c\ubc84\uac00 accept()\ud558\uc9c0\uc54a\uc558\ub294\ub370\ub3c4 connect()\uac00 \uc131\uacf5\ud560 \uc218 \uc788\ub294\uac00?<\/A> \n
        4. \ud558\ub098\uc758 \uc11c\ubc84 \uc774\uc0c1\uc744 \uc0ac\uc6a9\ud558\uace0 \uc788\uc744 \ub54c \uc65c \uc11c\ubc84 \uc8fc\uc18c\ub97c \uac00\ub054 \uc783\uc5b4 \ubc84\ub9ac\ub294\uac00?<\/A> \n
        5. connect()\ub97c \uc704\ud55c \ud0c0\uc784\uc544\uc6c3\uc2dc\uac04\uc744 \uc124\uc815\ud560 \uc218 \uc788\ub294\uac00?<\/A> \n
        6. \ud074\ub77c\uc774\uc5b8\ud2b8 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \ud3ec\ud2b8\ubc88\ud638\ub97c \uac16\uae30 \uc704\ud574 bind()\ub97c \uc368\uc57c \ud558\ub294\uac00 \uc544\ub2c8\uba74 \uc2dc\uc2a4\ud15c\uc774 connect()\ud638\ucd9c\uc5d0\uc11c \uc120\ud0dd\ud558\ub3c4\ub85d \ud574\uc57c \ud558\ub294\uac00?<\/A> \n
        7. \uc65c \uc11c\ubc84\uac00 \ub3d9\uc791\ud558\uace0 \uc788\uc9c0 \uc54a\uc744 \ub54c \"connection refused\"\ub77c\ub294 \uba54\uc2dc\uc9c0\uac00 \ub098\uc624\ub294\uac00?<\/A> \n
        8. \uc18c\ucf13\uc744 \ud1b5\ud574 \ub4e4\uc5b4\uc624\ub294 \uc815\ubcf4\uc758 \uc591\uc744 \ubaa8\ub97c \uacbd\uc6b0 \uc5b4\ub5bb\uac8c \ud574\uc57c \ud558\ub294\uac00? \ub3d9\uc801 \ubc84\ud37c\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc774 \uc788\ub294\uac00?<\/A><\/LI><\/OL>\n
        9. \uc11c\ubc84 \ub9cc\ub4e4\uae30 (TCP\/SOCK_STREAM)<\/A> \n
            \n
          1. bind()\ud560 \ub54c \"address already in use\" \uba54\uc2dc\uc9c0\uac00 \ub098\uc654\ub294\ub370 \ubb34\uc2a8\uc758\ubbf8\uc778\uac00?<\/A> \n
          2. \uc65c \uc18c\ucf13\uc744 \ub2eb\uc744 \uc218 \uc5c6\ub294\uac00?<\/A> \n
          3. \ub0b4 \uc11c\ubc84\ub97c \ub370\ubaac\uc73c\ub85c \ub9cc\ub4e4\ub824\uba74?<\/A> \n
          4. \ud55c\ubc88\uc5d0 \uc5ec\ub7ec \ud3ec\ud2b8\ub85c\ubd80\ud130 listen\ud560 \uc218 \uc788\ub294\uac00?<\/A> \n
          5. SO_REUSEADDR \uac00 \uc815\ud655\ud788 \ubb50\ud558\ub294 \uac83\uc778\uac00?<\/A> \n
          6. SO_LINGER \uac00 \uc815\ud655\ud788 \ubb50\ud558\ub294 \uac83\uc778\uac00?<\/A> \n
          7. SO_KEEPALIVE \uac00 \uc815\ud655\ud788 \ubb50\ud558\ub294 \uac83\uc778\uac00?<\/A> \n
          8. \ud3ec\ud2b8 \ubc88\ud638\ub97c 1024 \uc774\ud558\ub85c bind()\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc740?<\/A> \n
          9. \ud074\ub77c\uc774\uc5b8\ud2b8\uc758 \uc8fc\uc18c\uc640 \ud638\uc2a4\ud2b8 \uc774\ub984\uc744 \uc54c\uc544\ub0b4\ub294 \ubc29\ubc95\uc740?<\/A> \n
          10. \ub098\uc758 \uc11c\ubc84\ub97c \uc704\ud55c \ud3ec\ud2b8\ubc88\ud638\ub97c \uc5b4\ub5bb\uac8c \uc120\ud0dd \ud574\uc57c \ud558\ub294\uac00?<\/A> \n
          11. SO_REUSEADDR \uc640 SO_REUSEPORT \uc758 \ucc28\uc774\ub294 \ubb34\uc5c7\uc778\uac00?<\/A> \n
          12. multi-homed server\ub97c \ub9cc\ub4dc\ub294 \ubc29\ubc95\uc740?<\/A> \n
          13. \ud55c \ubc88\uc5d0 \ud55c \uae00\uc9dc\uc2dd \uc77d\ub294 \ubc29\ubc95\uc740?<\/A> \n
          14. \uc11c\ubc84\uc5d0\uc11c exec()\ub97c \uc2e4\ud589\ud558\uace0 \uadf8\uac83\uc5d0 \uc18c\ucf13 I\/O\ub97c attach\uc2dc\ud0a4\ub824\uace0 \ud558\uace0 \uc788\ub2e4. \uadf8\ub7f0\ub370 \uadf8\uac83\uc744 \ud1b5\ud558\uc5ec \ubaa8\ub4e0 \uadf8 \ub370\uc774\ud130\ub97c \uc5bb\uc9c0 \ubabb\ud558\uace0 \uc788\ub2e4. \uc65c \uadf8\ub7f0\uac00?<\/A><\/LI><\/OL>\n
          15. UDP\/SOCK_DGRAM \uc5b4\ud50c\ub9ac\ucf00\uc774\uc158 \uc791\uc131 <\/A>\n
              \n
            1. TCP\ub300\uc2e0\uc5d0 UDP\ub294 \uc5b8\uc81c \uc0ac\uc6a9\ud558\ub294\uac00?<\/A> \n
            2. \"connected\" \uc18c\ucf13\uacfc \"unconnected\"\uc18c\ucf13\uc758 \ucc28\uc774\ub294 \ubb34\uc5c7\uc778\uac00?<\/A> \n
            3. connect() \ud638\ucd9c\uc774 \uc18c\ucf13\uc758 \uc218\uc2e0\uc5d0 \uc601\ud5a5\uc744 \uc8fc\ub294\uac00?<\/A> \n
            4. \"connected\" UPD \uc18c\ucf13\uc73c\ub85c\ubd80\ud130 \uc5b4\ub5bb\uac8c \ud558\uba74 ICMP error\ub97c \uc77d\uc744 \uc218 \uc788\ub294\uac00?<\/A> \n
            5. \uc5b4\ub5bb\uac8c UDP\uba54\uc2dc\uc9c0\uac00 \uc218\uc2e0 \ub418\uc5c8\ub2e4\ub294 \uac83\uc744 \ud655\uc2e0 \ud560 \uc218 \uc788\ub294\uac00?<\/A> \n
            6. UDP \uba54\uc2dc\uc9c0\uac00 \uc21c\uc11c\ub300\ub85c \ub3c4\ucc29\ud588\uc74c\uc744 \ud655\uc2e0\ud560 \uc218 \uc788\ub294\uac00?<\/A> \n
            7. \uc5bc\ub9c8\ub098 \uc790\uc8fc un-ack\ub41c \uba54\uc2dc\uc9c0\uc5d0\ub300\ud574\uc11c \uc7ac\uc804\uc1a1 \ud574\uc57c \ud558\ub294\uac00?<\/A> \n
            8. How come only the first part of my datagram is getting
              through?<\/A><\/LI><\/OL>\n
            9. \uace0\uae09 \uc18c\ucf13 \ud504\ub85c\uadf8\ub798\ubc0d <\/A>\n
                \n
              1. \ud604\uc7ac\uc758 \uc18c\ucf13 \ud504\ub85c\uadf8\ub7a8\uc744 \ube44\ube14\ub85d\ud0b9 \ubaa8\ub4dc\ub85c \ubc14\uafb8\ub294 \ubc29\ubc95\uc740?<\/A> \n
              2. connect()\uc758 \ud0c0\uc784\uc544\uc6c3\uc744 \uc124\uc815\ud558\ub294 \ubc29\ubc95\uc740? <\/A><\/LI><\/OL>\n
              3. \uc608\uc81c \uc18c\uc2a4 \ucf54\ub4dc<\/A>
                <\/LI><\/OL>\n","protected":false},"excerpt":{"rendered":"

                \uc77c\ubc18 \uc815\ubcf4\uc640 \uac1c\ub150 \uc774 FAQ\uc5d0 \ub300\ud558\uc5ec \ub204\uad6c\ub97c \uc704\ud55c FAQ \uc778\uac00? \uc18c\ucf13\uc740 \ubb34\uc5c7\uc778\uac00? \uc18c\ucf13\uc740 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uac00? \ucc45\uc5d0 \uc788\ub294 \uc18c\uc2a4\ucf54\ub4dc\ub97c \uad6c\ud560 \uc218 \uc788\ub294\ub370\uac00 \uc788\ub294\uac00? \ub610 \ub2e4\ub978 \uc815\ubcf4\ub4e4\uc740 \uc5b4\ub514\uc5d0\uc11c \uad6c\ud560 \uc218 \uc788\ub294\uac00? \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84 \uc591\ucabd\uc5d0 \uad00\ud55c \uc9c8\ubb38 (TCP\/SOCK_STREAM) \uc5b8\uc81c \uc0c1\ub300\ubc29\ucabd \uc18c\ucf13\uc774 \ub04a\uacbc\ub294\uc9c0 \uc54c \uc218 \uc788\ub294 \ubc29\ubc95\uc774 \uc788\ub294\uac00? bind()\uc758 \ub450 \ubc88\uc9f8 \ud30c\ub77c\uba54\ud130\ub294 \ubb34\uc5c7\uc778\uac00? \uc8fc\uc5b4\uc9c4 \uc11c\ube44\uc2a4\uc758 port\ubc88\ud638\ub97c \uc5bb\ub294 \ubc29\ubc95\uc740? bind() […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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