Difference between revisions of "Connect"
(New page: '''connect (HLCALL 0x3E0F)''' - initiate a connection on a socket == Synopsis == ''Assembly language'' ld a, (sock_fd) ld de, DEST_IP_BUF ld bc, DEST_PORT ld hl, CONNECT call HLCAL...) |
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The '''connect()''' call connects the socket referred to by the file descriptor sockfd to the address specified in serv_addr. The only address format currently supported is the struct sockaddr_in IPv4 address and port. | The '''connect()''' call connects the socket referred to by the file descriptor sockfd to the address specified in serv_addr. The only address format currently supported is the struct sockaddr_in IPv4 address and port. | ||
When using the assembly language call, the DE register pair points to the remote host's IPv4 address, | When using the assembly language call, the DE register pair points to the start of the 4 byte buffer in memory containing the remote host's IPv4 address, as a 4 byte big endian value. The BC register pair contains the 16 bit port number for the remote host. The connect call translates the port number into network byte order; BC should contain the port number in the normal Z80 little endian format. | ||
== Return value == | == Return value == | ||
Latest revision as of 21:41, 19 June 2008
connect (HLCALL 0x3E0F) - initiate a connection on a socket
Synopsis
Assembly language
ld a, (sock_fd) ld de, DEST_IP_BUF ld bc, DEST_PORT ld hl, CONNECT call HLCALL
C
#include <sys/types.h> #include <sys/socket.h> int connect(int sockfd, struct sockaddr *serv_addr, socklen_t addrlen);
Description
The connect() call connects the socket referred to by the file descriptor sockfd to the address specified in serv_addr. The only address format currently supported is the struct sockaddr_in IPv4 address and port.
When using the assembly language call, the DE register pair points to the start of the 4 byte buffer in memory containing the remote host's IPv4 address, as a 4 byte big endian value. The BC register pair contains the 16 bit port number for the remote host. The connect call translates the port number into network byte order; BC should contain the port number in the normal Z80 little endian format.
Return value
On success, the C connect() call returns 0, and on error, returns -1.
The assembly language call returns with the accumulator set to zero on success. On error, the carry flag is set and the accumulator is set to the error number.