amxp_connections.c

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#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
 
#include <string.h>
 
#include <amxc/amxc_macros.h>
#include <amxc/amxc.h>
#include <amxp/amxp_signal.h>
#include <amxp/amxp_connection.h>
 
static amxc_llist_t listeners;
static amxc_llist_t connections;
 
static amxp_connection_t* amxp_connection_get_internal(amxc_llist_t* list,
                                                       int fd) {
    amxp_connection_t* con = NULL;
 
    amxc_llist_for_each(it, list) {
        con = amxc_llist_it_get_data(it, amxp_connection_t, it);
        if(con->fd == fd) {
            break;
        }
        con = NULL;
    }
 
    return con;
}
 
static int amxp_can_add_connection(int fd,
                                   uint32_t type) {
    int retval = -1;
    amxp_connection_t* con = NULL;
 
    if(type == AMXP_CONNECTION_LISTEN) {
        con = amxp_connection_get_internal(&listeners, fd);
    } else {
        con = amxp_connection_get_internal(&connections, fd);
    }
 
    retval = con == NULL ? 0 : -1;
 
    return retval;
}
 
static int amxp_connection_add_impl(amxp_connection_t* con,
                                    amxp_fd_cb_t reader) {
    int retval = -1;
    amxc_var_t var_fd;
 
    amxc_var_init(&var_fd);
    amxc_var_set(fd_t, &var_fd, con->fd);
 
    con->reader = reader;
    if(con->type == AMXP_CONNECTION_LISTEN) {
        amxc_llist_append(&listeners, &con->it);
        amxp_sigmngr_trigger_signal(NULL, "listen-added", &var_fd);
    } else {
        amxc_llist_append(&connections, &con->it);
        amxp_sigmngr_trigger_signal(NULL, "connection-added", &var_fd);
    }
 
    retval = 0;
 
    amxc_var_clean(&var_fd);
    return retval;
}
 
static void amxp_connection_free(amxc_llist_it_t* it) {
    amxp_connection_t* con = amxc_llist_it_get_data(it, amxp_connection_t, it);
    free(con->uri);
    free(con);
}
 
int amxp_connection_add(int fd,
                        amxp_fd_cb_t reader,
                        const char* uri,
                        uint32_t type,
                        void* priv) {
    int retval = -1;
    amxp_connection_t* con = NULL;
 
    when_null(reader, exit);
    when_true(fd < 0, exit);
 
    retval = amxp_can_add_connection(fd, type);
    when_failed(retval, exit);
 
    retval = -1;
    con = (amxp_connection_t*) calloc(1, sizeof(amxp_connection_t));
    when_null(con, exit);
 
    con->uri = uri == NULL ? NULL : strdup(uri);
    con->fd = fd;
    con->priv = priv;
    con->type = type;
 
    retval = amxp_connection_add_impl(con, reader);
 
exit:
    if(retval != 0) {
        free(con);
    }
    return retval;
}
 
int amxp_connection_wait_write(int fd,
                               amxp_fd_cb_t can_write_cb) {
    int retval = -1;
    amxp_connection_t* con = NULL;
    amxc_var_t var_fd;
    const char* signal = "connection-wait-write";
 
    amxc_var_init(&var_fd);
    when_true(fd < 0, exit);
    when_null(can_write_cb, exit);
 
    con = amxp_connection_get_internal(&connections, fd);
    when_null(con, exit);
 
    amxc_var_set(fd_t, &var_fd, fd);
    amxp_sigmngr_trigger_signal(NULL, signal, &var_fd);
    con->can_write = can_write_cb;
 
    retval = 0;
 
exit:
    amxc_var_clean(&var_fd);
    return retval;
}
 
int amxp_connection_remove(int fd) {
    int retval = -1;
    amxp_connection_t* con = NULL;
    amxc_var_t var_fd;
    const char* signal = "connection-deleted";
 
    amxc_var_init(&var_fd);
 
    con = amxp_connection_get_internal(&connections, fd);
    if(con == NULL) {
        signal = "listen-deleted";
        con = amxp_connection_get_internal(&listeners, fd);
    }
    when_null(con, exit);
 
    amxc_var_set(fd_t, &var_fd, fd);
    amxp_sigmngr_trigger_signal(NULL, signal, &var_fd);
    amxc_llist_it_clean(&con->it, amxp_connection_free);
 
    retval = 0;
 
exit:
    amxc_var_clean(&var_fd);
    return retval;
}
 
amxp_connection_t* amxp_connection_get(int fd) {
    amxp_connection_t* con = NULL;
 
    con = amxp_connection_get_internal(&connections, fd);
    if(con != NULL) {
        goto exit;
    }
    con = amxp_connection_get_internal(&listeners, fd);
 
exit:
    return con;
}
 
amxp_connection_t* amxp_connection_get_first(uint32_t type) {
    amxp_connection_t* con = NULL;
 
    amxc_llist_for_each(it, &connections) {
        con = amxc_llist_it_get_data(it, amxp_connection_t, it);
        if(con->type == type) {
            break;
        }
        con = NULL;
    }
 
    return con;
}
 
amxp_connection_t* amxp_connection_get_next(amxp_connection_t* con,
                                            uint32_t type) {
    amxc_llist_it_t* it = NULL;
    when_null(con, exit);
    when_true(con->it.llist != &connections, exit);
 
    it = amxc_llist_it_get_next(&con->it);
    con = NULL;
    while(it) {
        con = amxc_llist_it_get_data(it, amxp_connection_t, it);
        if(con->type == type) {
            break;
        }
        con = NULL;
        it = amxc_llist_it_get_next(it);
    }
 
exit:
    return con;
}
 
int amxp_connection_set_el_data(int fd,
                                void* el_data) {
    int retval = -1;
    amxp_connection_t* con = NULL;
 
    con = amxp_connection_get_internal(&connections, fd);
    if(con == NULL) {
        con = amxp_connection_get_internal(&listeners, fd);
    }
 
    when_null(con, exit);
    con->el_data = el_data;
 
    retval = 0;
 
exit:
    return retval;
}
 
amxc_llist_t* amxp_connection_get_connections(void) {
    return &connections;
}
 
amxc_llist_t* amxp_connection_get_listeners(void) {
    return &listeners;
}
 
DESTRUCTOR static void amxp_connection_cleanup(void) {
    amxc_llist_clean(&connections, amxp_connection_free);
    amxc_llist_clean(&listeners, amxp_connection_free);
}