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Dario Rodriguez authored on 18/08/2020 20:31:28
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+/* |
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+ * socklib.h |
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+ * |
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+ * Handy functions for IPv4 socket sonnections. |
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+ * |
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+ * Limitations: |
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+ * These are for the simplest case, as the recommended approach |
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+ * is to integrate the sock_connect() timeout inside the main |
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+ * loop as to don't be blocking. |
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+ * |
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+ * Documentation used: |
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+ * http://www.beej.us/guide/bgnet/output/html/multipage/getaddrinfoman.html |
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+ * |
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+ * Author: Dario Rodriguez dario@softhome.net |
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+ * This file is licensed under the terms of the GNU LGPL v2+ |
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+ */ |
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+ |
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+#ifndef SOCKLIB_H |
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+#define SOCKLIB_H |
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+#include <sys/select.h> /* fd_set */ |
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+ |
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+typedef void sselect; |
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+ |
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+char *ipv4_genip(char *hostname, long *resulthostsize); |
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+int ipv4_genport(char *portname, int fallback); |
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+int ipv4_preconnect(char *host, long hostsize, int port); /* setup socket, set non-blocking, connect(2) call */ |
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+int ipv4_connect(int fd, long timeoutmsec); /* tests writeability */ |
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+int ipv4_postconnect(int fd); /* hopefully connect(2) suceeded, set blocking */ |
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+int ipv4_server(int port); |
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+int ipv4_serverbinded(char *host, long hostsize, int port); |
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+int sock_accept(int fd); |
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+int sock_getinfo(int fd, int *iplen, char *ip, int *port); /* ip must be at least 16 bytes to have room for an ipv6 address */ |
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+int sock_queued(int fd); |
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+int sock_setblocking(int fd, int block); |
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+int sock_readable(int fd); |
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+ |
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+sselect *sselect_init(void); |
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+void sselect_free(sselect *ssel); |
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+int sselect_reset(sselect *ssel); |
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+int sselect_addread(sselect *ssel, int fd, void *userptr); |
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+int sselect_addwrite(sselect *ssel, int fd, void *userptr); |
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+int sselect_delread(sselect *ssel, int fd); |
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+int sselect_delwrite(sselect *ssel, int fd); |
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+int sselect_wait(sselect *ssel, int ms); |
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+int sselect_getread(sselect *ssel, int *fds, int sizefds); |
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+int sselect_getwrite(sselect *ssel, int *fds, int sizefds); |
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+void *sselect_getuserptr(sselect *ssel, int fd); |
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+ |
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+/* advanced sselect functions */ |
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+int sselect_getreadfiltered(sselect *ssel, fd_set *filter, int *fds, int sizefds); |
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+int sselect_getwritefiltered(sselect *ssel, fd_set *filter, int *fds, int sizefds); |
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+ |
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+/* socket configuration functions */ |
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+void sock_setfast(int fd); /* mark as low-bandwidth interactive stream */ |
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+void sock_setunsafe(int fd); /* for server sockets, configure reuseaddress, linger: only suitable for intranet usage */ |
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+void sock_setsafe(int fd); /* for non-server sockets, configure reuseaddress, linger: make them suitable for internet usage */ |
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+ |
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+#endif |