modbus_set_socket(3)

1MODBUS_SET_SOCKET(3)           Libmodbus Manual           MODBUS_SET_SOCKET(3)
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NAME

6       modbus_set_socket - set socket of the context
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SYNOPSIS

9       void modbus_set_socket(modbus_t *ctx, int socket);
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DESCRIPTION

12       The modbus_set_socket() function shall set the socket or file
13       descriptor in the libmodbus context. This function is useful for
14       managing multiple client connections to the same server.
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RETURN VALUE

17       There is no return values.
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EXAMPLE

20           ctx = modbus_new_tcp("127.0.0.1", 1502);
21           server_socket = modbus_tcp_listen(ctx, NB_CONNECTION);
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23           FD_ZERO(&rdset);
24           FD_SET(server_socket, &rdset);
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26           /* .... */
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28           if (FD_ISSET(master_socket, &rdset)) {
29               modbus_set_socket(ctx, master_socket);
30               rc = modbus_receive(ctx, query);
31               if (rc != -1) {
32                   modbus_reply(ctx, query, rc, mb_mapping);
33               }
34           }
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AUTHORS

40       The libmodbus documentation was written by Stéphane Raimbault
41       <stephane.raimbault@gmail.com[1]>
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NOTES

44        1. stephane.raimbault@gmail.com
45           mailto:stephane.raimbault@gmail.com
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49libmodbus 3.0.8                   07/31/2019              MODBUS_SET_SOCKET(3)